Switch to trusted publishing (#431 )

Unconditional function for empty generating mock (#430 )
Bump Nerdbank.GitVersioning from 3.8.38-alpha to 3.8.118 (#428 )
2025-10-05 12:08:46 +00:00 · 2025-10-03 09:37:32 +00:00 · 2025-09-30 21:52:59 +00:00 · 2025-09-29 23:52:31 +01:00 · 2025-09-28 01:31:56 +00:00 · 2025-09-21 01:31:20 +00:00
111 changed files with 114338 additions and 5843 deletions
--- a/.config/dotnet-tools.json
+++ b/.config/dotnet-tools.json
@@ -3,13 +3,13 @@
  "isRoot": true,
  "tools": {
    "fantomas": {
-      "version": "6.3.3",
+      "version": "7.0.3",
      "commands": [
        "fantomas"
      ]
    },
    "fsharp-analyzers": {
-      "version": "0.25.0",
+      "version": "0.32.1",
      "commands": [
        "fsharp-analyzers"
      ]
--- a/.envrc
+++ b/.envrc
@@ -1 +1,23 @@
 use flake
+DOTNET_PATH=$(readlink "$(which dotnet)")
+SETTINGS_FILE=$(find . -maxdepth 1 -type f -name '*.sln.DotSettings.user')
+MSBUILD=$(realpath "$(find "$(dirname "$DOTNET_PATH")/../share/dotnet/sdk" -maxdepth 2 -type f -name MSBuild.dll)")
+if [ -f "$SETTINGS_FILE" ] ; then
+    xmlstarlet ed --inplace \
+    -N wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation" \
+    -N x="http://schemas.microsoft.com/winfx/2006/xaml" \
+    -N s="clr-namespace:System;assembly=mscorlib" \
+    -N ss="urn:shemas-jetbrains-com:settings-storage-xaml" \
+    --update "//s:String[@x:Key='/Default/Environment/Hierarchy/Build/BuildTool/DotNetCliExePath/@EntryValue']" \
+    --value "$(realpath "$(dirname "$DOTNET_PATH")/../share/dotnet/dotnet")" \
+    "$SETTINGS_FILE"
+
+    xmlstarlet ed --inplace \
+    -N wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation" \
+    -N x="http://schemas.microsoft.com/winfx/2006/xaml" \
+    -N s="clr-namespace:System;assembly=mscorlib" \
+    -N ss="urn:shemas-jetbrains-com:settings-storage-xaml" \
+    --update "//s:String[@x:Key='/Default/Environment/Hierarchy/Build/BuildTool/CustomBuildToolPath/@EntryValue']" \
+    --value "$MSBUILD" \
+    "$SETTINGS_FILE"
+fi
--- a/.fantomasignore
+++ b/.fantomasignore
@@ -0,0 +1 @@
+.direnv/
--- a/.github/workflows/dotnet.yaml
+++ b/.github/workflows/dotnet.yaml
@@ -1,3 +1,4 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/github-workflow.json
 name: .NET

 on:
@@ -24,11 +25,11 @@ jobs:
    runs-on: ubuntu-latest

    steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
      with:
        fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
    - name: Install Nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@v31
      with:
        extra_nix_config: |
          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -45,11 +46,11 @@ jobs:
      security-events: write
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
        with:
          fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -64,35 +65,58 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
      - name: Build
        run: nix build
+      - name: Reproducibility check
+        run: nix build --rebuild

  check-dotnet-format:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
      - name: Run Fantomas
        run: nix run .#fantomas -- --check .

+  check-accurate-generations:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+        with:
+          fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+        with:
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+      - name: Whitespace change
+        run: "echo ' ' >> ConsumePlugin/List.fs"
+      - name: Generate code
+        run: nix develop --command dotnet build
+      - name: Run Fantomas
+        run: nix run .#fantomas -- .
+      - name: Verify there is no diff
+        run: git diff --name-only --no-color --exit-code
+
  check-nix-format:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -105,7 +129,7 @@ jobs:
    steps:
      - uses: actions/checkout@master
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -118,7 +142,7 @@ jobs:
    steps:
      - uses: actions/checkout@master
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -128,11 +152,11 @@ jobs:
  nuget-pack:
    runs-on: ubuntu-latest
    steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v5
      with:
        fetch-depth: 0 # so that NerdBank.GitVersioning has access to history
    - name: Install Nix
-      uses: cachix/install-nix-action@v26
+      uses: cachix/install-nix-action@v31
      with:
        extra_nix_config: |
          access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
@@ -158,7 +182,7 @@ jobs:
    runs-on: ubuntu-latest
    steps:
      - name: Download NuGet artifact (plugin)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
        with:
          name: nuget-package-plugin
          path: packed-plugin
@@ -166,7 +190,7 @@ jobs:
        # Verify that there is exactly one nupkg in the artifact that would be NuGet published
        run: if [[ $(find packed-plugin -maxdepth 1 -name 'WoofWare.Myriad.Plugins.*.nupkg' -printf c | wc -c) -ne "1" ]]; then exit 1; fi
      - name: Download NuGet artifact (attributes)
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v5
        with:
          name: nuget-package-attribute
          path: packed-attribute
@@ -174,40 +198,167 @@ jobs:
        # Verify that there is exactly one nupkg in the artifact that would be NuGet published
        run: if [[ $(find packed-attribute -maxdepth 1 -name 'WoofWare.Myriad.Plugins.Attributes.*.nupkg' -printf c | wc -c) -ne "1" ]]; then exit 1; fi

+  github-release-dry-run:
+    strategy:
+      matrix:
+        artifact:
+        - nuget-package-plugin
+        - nuget-package-attribute
+    runs-on: ubuntu-latest
+    needs: [nuget-pack]
+    steps:
+      - uses: actions/checkout@v5
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
+        with:
+          name: ${{ matrix.artifact }}
+      - name: Compute package path
+        id: compute-path
+        run: |
+          find . -maxdepth 1 -type f -name 'WoofWare.Myriad.*.nupkg' -exec sh -c 'echo "output=$(basename "$1")" >> $GITHUB_OUTPUT' shell {} \;
+      - name: Compute tag name
+        id: compute-tag
+        env:
+          NUPKG_PATH: ${{ steps.compute-path.outputs.output }}
+        run: echo "output=$(basename "$NUPKG_PATH" .nupkg)" >> $GITHUB_OUTPUT
+      - name: Tag and release
+        uses: G-Research/common-actions/github-release@19d7281a0f9f83e13c78f99a610dbc80fc59ba3b
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          target-commitish: ${{ github.sha }}
+          tag: ${{ steps.compute-tag.outputs.output }}
+          binary-contents: ${{ steps.compute-path.outputs.output }}
+          dry-run: true
+
  all-required-checks-complete:
-    needs: [check-dotnet-format, check-nix-format, build, build-nix, linkcheck, flake-check, analyzers, nuget-pack, expected-pack]
+    needs: [check-dotnet-format, check-nix-format, check-accurate-generations, build, build-nix, linkcheck, flake-check, analyzers, nuget-pack, expected-pack, github-release-dry-run]
+    if: ${{ always() }}
    runs-on: ubuntu-latest
    steps:
-      - run: echo "All required checks complete."
+      - uses: G-Research/common-actions/check-required-lite@2b7dc49cb14f3344fbe6019c14a31165e258c059
+        with:
+          needs-context: ${{ toJSON(needs) }}

-  nuget-publish:
+  attestation-attribute:
+    runs-on: ubuntu-latest
+    needs: [all-required-checks-complete]
+    if: ${{ !github.event.repository.fork && github.ref == 'refs/heads/main' }}
+    permissions:
+      id-token: write
+      attestations: write
+      contents: read
+    steps:
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
+        with:
+          name: nuget-package-attribute
+          path: packed
+      - name: Attest Build Provenance
+        uses: actions/attest-build-provenance@977bb373ede98d70efdf65b84cb5f73e068dcc2a # v3.0.0
+        with:
+          subject-path: "packed/*.nupkg"
+
+  attestation-plugin:
+    runs-on: ubuntu-latest
+    needs: [all-required-checks-complete]
+    if: ${{ !github.event.repository.fork && github.ref == 'refs/heads/main' }}
+    permissions:
+      id-token: write
+      attestations: write
+      contents: read
+    steps:
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
+        with:
+          name: nuget-package-plugin
+          path: packed
+      - name: Attest Build Provenance
+        uses: actions/attest-build-provenance@977bb373ede98d70efdf65b84cb5f73e068dcc2a # v3.0.0
+        with:
+          subject-path: "packed/*.nupkg"
+
+  nuget-publish-attribute:
    runs-on: ubuntu-latest
    if: ${{ !github.event.repository.fork && github.ref == 'refs/heads/main' }}
    needs: [all-required-checks-complete]
    environment: main-deploy
+    permissions:
+      id-token: write
+      attestations: write
+      contents: read
    steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
      - name: Install Nix
-        uses: cachix/install-nix-action@v26
+        uses: cachix/install-nix-action@v31
        with:
          extra_nix_config: |
            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
-      - name: Download NuGet artifact (plugin)
-        uses: actions/download-artifact@v4
-        with:
-          name: nuget-package-plugin
-          path: packed-plugin
-      - name: Publish to NuGet (plugin)
-        run: nix develop --command dotnet nuget push "packed-plugin/WoofWare.Myriad.Plugins.*.nupkg" --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
-      - name: Download NuGet artifact (attribute)
-        uses: actions/download-artifact@v4
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
        with:
          name: nuget-package-attribute
-          path: packed-attribute
-      - name: Publish to NuGet (attribute)
-        run: nix develop --command dotnet nuget push "packed-attribute/WoofWare.Myriad.Plugins.Attributes.*.nupkg" --api-key ${{ secrets.NUGET_API_KEY }} --source https://api.nuget.org/v3/index.json --skip-duplicate
+          path: packed
+      - name: Identify `dotnet`
+        id: dotnet-identify
+        run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
+      - name: Obtain NuGet key
+        uses: NuGet/login@d22cc5f58ff5b88bf9bd452535b4335137e24544
+        id: login
+        with:
+            user: ${{ secrets.NUGET_USER }}
+      - name: Publish to NuGet
+        id: publish-success
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
+        with:
+          package-name: WoofWare.Myriad.Plugins.Attributes
+          nuget-key: ${{ steps.login.outputs.NUGET_API_KEY }}
+          nupkg-dir: packed/
+          dotnet: ${{ steps.dotnet-identify.outputs.dotnet }}

-  github-release-plugin:
+  nuget-publish-plugin:
+    runs-on: ubuntu-latest
+    if: ${{ !github.event.repository.fork && github.ref == 'refs/heads/main' }}
+    needs: [all-required-checks-complete]
+    environment: main-deploy
+    permissions:
+      id-token: write
+      attestations: write
+      contents: read
+    steps:
+      - uses: actions/checkout@v5
+      - name: Install Nix
+        uses: cachix/install-nix-action@v31
+        with:
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
+        with:
+          name: nuget-package-plugin
+          path: packed
+      - name: Identify `dotnet`
+        id: dotnet-identify
+        run: nix develop --command bash -c 'echo "dotnet=$(which dotnet)" >> $GITHUB_OUTPUT'
+      - name: Obtain NuGet key
+        uses: NuGet/login@d22cc5f58ff5b88bf9bd452535b4335137e24544
+        id: login
+        with:
+            user: ${{ secrets.NUGET_USER }}
+      - name: Publish to NuGet
+        id: publish-success
+        uses: G-Research/common-actions/publish-nuget@2b7dc49cb14f3344fbe6019c14a31165e258c059
+        with:
+          package-name: WoofWare.Myriad.Plugins
+          nuget-key: ${{ steps.login.outputs.NUGET_API_KEY }}
+          nupkg-dir: packed/
+          dotnet: ${{ steps.dotnet-identify.outputs.dotnet }}
+
+  github-release:
+    strategy:
+      matrix:
+        artifact:
+        - nuget-package-attribute
+        - nuget-package-plugin
    runs-on: ubuntu-latest
    if: ${{ !github.event.repository.fork && github.ref == 'refs/heads/main' }}
    needs: [all-required-checks-complete]
@@ -215,16 +366,24 @@ jobs:
    permissions:
      contents: write
    steps:
-      - uses: actions/checkout@v4
-      - name: Download NuGet artifact (plugin)
-        uses: actions/download-artifact@v4
+      - uses: actions/checkout@v5
+      - name: Download NuGet artifact
+        uses: actions/download-artifact@v5
        with:
-          name: nuget-package-plugin
-      - name: Download NuGet artifact (attribute)
-        uses: actions/download-artifact@v4
-        with:
-          name: nuget-package-attribute
-      - name: Tag and release plugin
+          name: ${{ matrix.artifact }}
+      - name: Compute package path
+        id: compute-path
+        run: |
+          find . -maxdepth 1 -type f -name 'WoofWare.Myriad.*.nupkg' -exec sh -c 'echo "output=$(basename "$1")" >> $GITHUB_OUTPUT' shell {} \;
+      - name: Compute tag name
+        id: compute-tag
        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: sh .github/workflows/tag.sh
+          NUPKG_PATH: ${{ steps.compute-path.outputs.output }}
+        run: echo "output=$(basename "$NUPKG_PATH" .nupkg)" >> $GITHUB_OUTPUT
+      - name: Tag and release
+        uses: G-Research/common-actions/github-release@19d7281a0f9f83e13c78f99a610dbc80fc59ba3b
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          target-commitish: ${{ github.sha }}
+          tag: ${{ steps.compute-tag.outputs.output }}
+          binary-contents: ${{ steps.compute-path.outputs.output }}
--- a/.github/workflows/flake_update.yaml
+++ b/.github/workflows/flake_update.yaml
@@ -0,0 +1,57 @@
+# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/github-workflow.json
+name: Weekly Nix Flake Update
+
+on:
+  schedule:
+    - cron: '0 0 * * 0'  # Runs at 00:00 every Sunday
+  workflow_dispatch:  # Allows manual triggering
+
+jobs:
+  update-nix-flake:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v5
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Update Nix flake
+        run: 'nix flake update'
+
+      - name: Build fetch-deps
+        run: 'nix build ".#default.fetch-deps"'
+
+      - name: Run fetch-deps
+        run: |
+            set -o pipefail
+            ./result nix/deps.json
+
+      - name: Format
+        run: 'nix develop --command alejandra .'
+
+      - name: Create token
+        id: generate-token
+        uses: actions/create-github-app-token@v2
+        with:
+          # https://github.com/actions/create-github-app-token/issues/136
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.APP_PRIVATE_KEY }}
+
+      - name: Raise pull request
+        uses: Smaug123/commit-action@d34807f26cb52c7a05bbd80efe9f964cdf29bc87
+        id: cpr
+        with:
+            bearer-token: ${{ steps.generate-token.outputs.token }}
+            pr-title: "Upgrade Nix flake and deps"
+            branch-name: "auto-pr"
+
+      - name: Enable Pull Request Automerge
+        if: ${{ steps.cpr.outputs.pull-request-number }}
+        uses: peter-evans/enable-pull-request-automerge@v3
+        with:
+          token: ${{ steps.generate-token.outputs.token }}
+          pull-request-number: ${{ steps.cpr.outputs.pull-request-number }}
+          merge-method: squash
--- a/.github/workflows/tag.sh
+++ b/.github/workflows/tag.sh
@@ -1,17 +0,0 @@
-#!/bin/sh
-
-find . -maxdepth 1 -type f -name '*.nupkg' -exec sh -c 'tag=$(basename "$1" .nupkg); git tag "$tag"; git push origin "$tag"' shell {} \;
-
-export TAG
-TAG=$(find . -maxdepth 1 -type f -name 'WoofWare.Myriad.Plugins.*.nupkg' -exec sh -c 'basename "$1" .nupkg' shell {} \; | grep -v Attributes)
-
-case "$TAG" in
-  *"
-"*)
-    echo "Error: TAG contains a newline; multiple plugins found."
-    exit 1
-    ;;
-esac
-
-# target_commitish empty indicates the repo default branch
-curl -L -X POST -H "Accept: application/vnd.github+json" -H "Authorization: Bearer $GITHUB_TOKEN" -H "X-GitHub-Api-Version: 2022-11-28" https://api.github.com/repos/Smaug123/WoofWare.Myriad/releases -d '{"tag_name":"'"$TAG"'","target_commitish":"","name":"'"$TAG"'","draft":false,"prerelease":false,"generate_release_notes":false}'
--- a/.gitignore
+++ b/.gitignore
@@ -1,12 +1,14 @@
-bin/
-obj/
-/packages/
-riderModule.iml
-/_ReSharper.Caches/
-.idea/
-*.sln.DotSettings.user
-.DS_Store
-result
-.analyzerpackages/
-analysis.sarif
-.direnv/
+bin/
+obj/
+/packages/
+riderModule.iml
+/_ReSharper.Caches/
+.idea/
+*.sln.DotSettings.user
+.DS_Store
+result
+.analyzerpackages/
+analysis.sarif
+.direnv/
+.venv/
+.vs/
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,76 @@
 Notable changes are recorded here.

-# WoofWare.Myriad.Plugins 1.4 -> 2.0
+# WoofWare.Myriad.Plugins 8.1.1
+
+Adds `GenerateCapturingMock`, which is `GenerateMock` but additionally records the calls made to each function.
+
+# WoofWare.Myriad.Plugins 8.0.3
+
+The RestEase-style HTTP client generator now automatically adds the `application/json` content type header to requests which are POSTing a body that is known to be JSON-serialised.
+You can override this by setting the `[<RestEase.Header ("Content-Type", "desired content type")>]` header manually on any affected member.
+
+# WoofWare.Myriad.Plugins 7.0.1
+
+All generators should now be compatible with `<Nullable>enable</Nullable>`.
+
+**Please test the results and let me know of unexpected failures.**
+There are a number of heuristics in this code, because:
+
+* `System.Text.Json.Nodes` is an unfathomably weird API which simply requires us to make educated guesses about whether a user-provided type is supposed to be nullable, despite this being irrelevant to the operation of `System.Text.Json`;
+* Some types (like `Uri` and `String`) have `ToString` methods which can't return `null`, but in general `Object.ToString` can of course return `null`, and as far as I can tell there is simply no way to know from the source alone whether a given type will have a nullable `ToString`.
+
+# WoofWare.Myriad.Plugins 6.0.1
+
+The `ArgParser` generator's type signatures have changed.
+The `parse'` method no longer takes `getEnvironmentVariable : string -> string`; it's now `getEnvironmentVariable : string -> string option`.
+This is to permit satisfying the `<Nullable>enable</Nullable>` compiler setting.
+If you're calling `parse'`, give it `Environment.GetEnvironmentVariable >> Option.ofObj` instead.
+
+# WoofWare.Myriad.Plugins 5.0.1
+
+We now enforce non-nullability on more types during JSON parse.
+We have always expected you to consume nullable types wrapped in an `option`, but now we enforce this in more cases by throwing `ArgumentNullException`.
+
+# WoofWare.Myriad.Plugins 3.0.1
+
+Semantics of `HttpClient`'s URI component composition changed:
+we now implicitly insert `/` characters after `[<BaseAddress>]` and `[<BasePath>]`, so that URI composition doesn't silently drop the last component if you didn't put a slash there.
+
+# WoofWare.Myriad.Plugins 2.3.9
+
+`JsonParse` and `JsonSerialize` now interpret `[<JsonExtensionData>]`, which must be on a `Dictionary<string, _>`; this collects any extra components that were present on the JSON object.
+
+# WoofWare.Myriad.Plugins 2.2.1, WoofWare.Myriad.Plugins.Attributes 3.2.1
+
+New generator: `ArgParser`, a basic reflection-free argument parser.
+
+# WoofWare.Myriad.Plugins 2.1.45, WoofWare.Myriad.Plugins.Attributes 3.1.7
+
+The NuGet packages are now attested to through [GitHub Attestations](https://github.blog/2024-05-02-introducing-artifact-attestations-now-in-public-beta/).
+You can run `gh attestation verify ~/.nuget/packages/woofware.myriad.plugins/2.1.45/woofware.myriad.plugins.2.1.45.nupkg -o Smaug123`, for example, to verify with GitHub that the GitHub Actions pipeline on this repository produced a nupkg file with the same hash as the one you were served from NuGet.
+
+# WoofWare.Myriad.Plugins 2.1.33
+
+`JsonParse` can now deserialize the discriminated unions which `JsonSerialize` wrote out.
+
+# WoofWare.Myriad.Plugins 2.1.32, WoofWare.Myriad.Plugins.Attributes 3.1.4
+
+`JsonSerialize` can now serialize many discriminated unions.
+(This operation is inherently opinionated, because JSON does not model discriminated unions.)
+
+# WoofWare.Myriad.Plugins 2.1.20, WoofWare.Myriad.Plugins.Attributes 3.0.1
+
+We now bundle copies of the RestEase attributes in `WoofWare.Myriad.Plugins.Attributes`, in case you don't want to take a dependency on RestEase.
+
+# WoofWare.Myriad.Plugins 2.1.15
+
+The `GenerateMock` generator now permits a limited amount of inheritance in the record we're mocking out (specifically, `IDisposable`).
+
+# WoofWare.Myriad.Plugins 2.1.8
+
+No change to the packages, but this is when we started creating and tagging GitHub releases, which are a better source of truth than this file.
+
+# WoofWare.Myriad.Plugins 2.0

 This transition split the attributes (e.g. `[<JsonParseAttribute>]`) into their own assembly, WoofWare.Myriad.Plugins.Attributes.
 The new assembly has minimal dependencies, so you may safely use it from your own code.
--- a/ConsumePlugin/Args.fs
+++ b/ConsumePlugin/Args.fs
@@ -0,0 +1,237 @@
+namespace ConsumePlugin
+
+open System
+open System.IO
+open WoofWare.Myriad.Plugins
+
+[<ArgParser>]
+type BasicNoPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        Rest : int list
+    }
+
+[<ArgParser>]
+type Basic =
+    {
+        [<ArgumentHelpText "This is a foo!">]
+        Foo : int
+        Bar : string
+        Baz : bool
+        [<ArgumentHelpText "Here's where the rest of the args go">]
+        [<PositionalArgs>]
+        Rest : string list
+    }
+
+[<ArgParser>]
+type BasicWithIntPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        [<PositionalArgs>]
+        Rest : int list
+    }
+
+[<ArgParser>]
+type LoadsOfTypes =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        SomeFile : FileInfo
+        SomeDirectory : DirectoryInfo
+        SomeList : DirectoryInfo list
+        OptionalThingWithNoDefault : int option
+        [<PositionalArgs>]
+        Positionals : int list
+        [<ArgumentDefaultFunction>]
+        OptionalThing : Choice<bool, bool>
+        [<ArgumentDefaultFunction>]
+        AnotherOptionalThing : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        YetAnotherOptionalThing : Choice<string, string>
+    }
+
+    static member DefaultOptionalThing () = true
+
+    static member DefaultAnotherOptionalThing () = 3
+
+[<ArgParser>]
+type LoadsOfTypesNoPositionals =
+    {
+        Foo : int
+        Bar : string
+        Baz : bool
+        SomeFile : FileInfo
+        SomeDirectory : DirectoryInfo
+        SomeList : DirectoryInfo list
+        OptionalThingWithNoDefault : int option
+        [<ArgumentDefaultFunction>]
+        OptionalThing : Choice<bool, bool>
+        [<ArgumentDefaultFunction>]
+        AnotherOptionalThing : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        YetAnotherOptionalThing : Choice<string, string>
+    }
+
+    static member DefaultOptionalThing () = false
+
+    static member DefaultAnotherOptionalThing () = 3
+
+[<ArgParser true>]
+type DatesAndTimes =
+    {
+        Plain : TimeSpan
+        [<InvariantCulture>]
+        Invariant : TimeSpan
+        [<ParseExact @"hh\:mm\:ss">]
+        [<ArgumentHelpText "An exact time please">]
+        Exact : TimeSpan
+        [<InvariantCulture ; ParseExact @"hh\:mm\:ss">]
+        InvariantExact : TimeSpan
+    }
+
+type ChildRecord =
+    {
+        Thing1 : int
+        Thing2 : string
+    }
+
+[<ArgParser true>]
+type ParentRecord =
+    {
+        Child : ChildRecord
+        AndAnother : bool
+    }
+
+type ChildRecordWithPositional =
+    {
+        Thing1 : int
+        [<PositionalArgs>]
+        Thing2 : Uri list
+    }
+
+[<ArgParser true>]
+type ParentRecordChildPos =
+    {
+        Child : ChildRecordWithPositional
+        AndAnother : bool
+    }
+
+[<ArgParser true>]
+type ParentRecordSelfPos =
+    {
+        Child : ChildRecord
+        [<PositionalArgs>]
+        AndAnother : bool list
+    }
+
+[<ArgParser true>]
+type ChoicePositionals =
+    {
+        [<PositionalArgs>]
+        Args : Choice<string, string> list
+    }
+
+[<ArgParser true>]
+type ContainsBoolEnvVar =
+    {
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        BoolVar : Choice<bool, bool>
+    }
+
+[<RequireQualifiedAccess>]
+module Consts =
+    [<Literal>]
+    let FALSE = false
+
+    [<Literal>]
+    let TRUE = true
+
+type DryRunMode =
+    | [<ArgumentFlag(Consts.FALSE)>] Wet
+    | [<ArgumentFlag true>] Dry
+
+[<ArgParser true>]
+type WithFlagDu =
+    {
+        DryRun : DryRunMode
+    }
+
+[<ArgParser true>]
+type ContainsFlagEnvVar =
+    {
+        // This phrasing is odd, but it's for a test. Nobody's really going to have `--dry-run`
+        // controlled by an env var!
+        [<ArgumentDefaultEnvironmentVariable "CONSUMEPLUGIN_THINGS">]
+        DryRun : Choice<DryRunMode, DryRunMode>
+    }
+
+[<ArgParser true>]
+type ContainsFlagDefaultValue =
+    {
+        [<ArgumentDefaultFunction>]
+        DryRun : Choice<DryRunMode, DryRunMode>
+    }
+
+    static member DefaultDryRun () = DryRunMode.Wet
+
+[<ArgParser true>]
+type ManyLongForms =
+    {
+        [<ArgumentLongForm "do-something-else">]
+        [<ArgumentLongForm "anotherarg">]
+        DoTheThing : string
+
+        [<ArgumentLongForm "turn-it-on">]
+        [<ArgumentLongForm "dont-turn-it-off">]
+        SomeFlag : bool
+    }
+
+[<RequireQualifiedAccess>]
+type private IrrelevantDu =
+    | Foo
+    | Bar
+
+[<ArgParser true>]
+type FlagsIntoPositionalArgs =
+    {
+        A : string
+        [<PositionalArgs true>]
+        GrabEverything : string list
+    }
+
+[<ArgParser true>]
+type FlagsIntoPositionalArgsChoice =
+    {
+        A : string
+        [<PositionalArgs true>]
+        GrabEverything : Choice<string, string> list
+    }
+
+[<ArgParser true>]
+type FlagsIntoPositionalArgsInt =
+    {
+        A : string
+        [<PositionalArgs true>]
+        GrabEverything : int list
+    }
+
+[<ArgParser true>]
+type FlagsIntoPositionalArgsIntChoice =
+    {
+        A : string
+        [<PositionalArgs true>]
+        GrabEverything : Choice<int, int> list
+    }
+
+[<ArgParser true>]
+type FlagsIntoPositionalArgs' =
+    {
+        A : string
+        [<PositionalArgs false>]
+        DontGrabEverything : string list
+    }
--- a/ConsumePlugin/CapturingMockExample.fs
+++ b/ConsumePlugin/CapturingMockExample.fs
@@ -0,0 +1,57 @@
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<GenerateCapturingMock>]
+type IPublicType =
+    abstract Mem1 : foo : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+[<GenerateCapturingMock false>]
+type IPublicTypeInternalFalse =
+    abstract Mem1 : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+[<GenerateCapturingMock>]
+type internal InternalType =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+[<GenerateCapturingMock>]
+type private PrivateType =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+[<GenerateCapturingMock false>]
+type private PrivateTypeInternalFalse =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+[<GenerateCapturingMock>]
+type VeryPublicType<'a, 'b> =
+    abstract Mem1 : 'a -> 'b
+
+[<GenerateCapturingMock>]
+type Curried<'a> =
+    abstract Mem1 : bar : int -> 'a -> string
+    abstract Mem2 : int * string -> baz : 'a -> string
+    abstract Mem3 : quux : (int * string) -> flurb : 'a -> string
+    abstract Mem4 : (int * string) -> ('a * int) -> string
+    abstract Mem5 : x : int * string -> ('a * int) -> string
+    abstract Mem6 : int * string -> y : 'a * int -> string
+
+[<GenerateCapturingMock>]
+type TypeWithInterface =
+    inherit IDisposable
+    abstract Mem1 : string option -> string[] Async
+    abstract Mem2 : unit -> string[] Async
+
+[<GenerateCapturingMock>]
+type TypeWithProperties =
+    inherit IDisposable
+    abstract Mem1 : string option -> string[] Async
+    abstract Prop1 : int
+    abstract Prop2 : unit Async
--- a/ConsumePlugin/CapturingMockExampleNoAttributes.fs
+++ b/ConsumePlugin/CapturingMockExampleNoAttributes.fs
@@ -0,0 +1,41 @@
+namespace SomeNamespace.CapturingMock
+
+open System
+
+type IPublicTypeNoAttr =
+    abstract Mem1 : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+type IPublicTypeInternalFalseNoAttr =
+    abstract Mem1 : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+type internal InternalTypeNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type private PrivateTypeNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type private PrivateTypeInternalFalseNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type VeryPublicTypeNoAttr<'a, 'b> =
+    abstract Mem1 : 'a -> 'b
+
+type CurriedNoAttr<'a> =
+    abstract Mem1 : int -> 'a -> string
+    abstract Mem2 : int * string -> 'a -> string
+    abstract Mem3 : (int * string) -> 'a -> string
+    abstract Mem4 : (int * string) -> ('a * int) -> string
+    abstract Mem5 : x : int * string -> ('a * int) -> string
+    abstract Mem6 : int * string -> y : 'a * int -> string
+
+type TypeWithInterfaceNoAttr =
+    inherit IDisposable
+    abstract Mem1 : string option -> string[] Async
+    abstract Mem2 : unit -> string[] Async
--- a/ConsumePlugin/ConsumePlugin.fsproj
+++ b/ConsumePlugin/ConsumePlugin.fsproj
@@ -1,8 +1,10 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
    <IsPackable>false</IsPackable>
+    <OtherFlags>--reflectionfree $(OtherFlags)</OtherFlags>
+    <Nullable>enable</Nullable>
  </PropertyGroup>
  <ItemGroup>
    <MyriadSdkGenerator Include="$(MSBuildThisFileDirectory)..\WoofWare.Myriad.Plugins\bin\$(Configuration)\net6.0\WoofWare.Myriad.Plugins.dll"/>
@@ -31,6 +33,38 @@
    <Compile Include="GeneratedMock.fs">
      <MyriadFile>MockExample.fs</MyriadFile>
    </Compile>
+    <Compile Include="CapturingMockExample.fs" />
+    <Compile Include="GeneratedCapturingMock.fs">
+      <MyriadFile>CapturingMockExample.fs</MyriadFile>
+    </Compile>
+    <Compile Include="MockExampleNoAttributes.fs" />
+    <Compile Include="GeneratedMockNoAttributes.fs">
+      <MyriadFile>MockExampleNoAttributes.fs</MyriadFile>
+      <MyriadParams>
+        <IPublicTypeNoAttr>GenerateMock</IPublicTypeNoAttr>
+        <IPublicTypeInternalFalseNoAttr>GenerateMock(false)</IPublicTypeInternalFalseNoAttr>
+        <InternalTypeNoAttr>GenerateMock</InternalTypeNoAttr>
+        <PrivateTypeNoAttr>GenerateMock</PrivateTypeNoAttr>
+        <PrivateTypeInternalFalseNoAttr>GenerateMock(false)</PrivateTypeInternalFalseNoAttr>
+        <VeryPublicTypeNoAttr>GenerateMock</VeryPublicTypeNoAttr>
+        <CurriedNoAttr>GenerateMock</CurriedNoAttr>
+        <TypeWithInterfaceNoAttr>GenerateMock</TypeWithInterfaceNoAttr>
+      </MyriadParams>
+    </Compile>
+    <Compile Include="CapturingMockExampleNoAttributes.fs" />
+    <Compile Include="GeneratedCapturingMockNoAttributes.fs">
+      <MyriadFile>CapturingMockExampleNoAttributes.fs</MyriadFile>
+      <MyriadParams>
+        <IPublicTypeNoAttr>GenerateCapturingMock</IPublicTypeNoAttr>
+        <IPublicTypeInternalFalseNoAttr>GenerateCapturingMock(false)</IPublicTypeInternalFalseNoAttr>
+        <InternalTypeNoAttr>GenerateCapturingMock</InternalTypeNoAttr>
+        <PrivateTypeNoAttr>GenerateCapturingMock</PrivateTypeNoAttr>
+        <PrivateTypeInternalFalseNoAttr>GenerateCapturingMock(false)</PrivateTypeInternalFalseNoAttr>
+        <VeryPublicTypeNoAttr>GenerateCapturingMock</VeryPublicTypeNoAttr>
+        <CurriedNoAttr>GenerateCapturingMock</CurriedNoAttr>
+        <TypeWithInterfaceNoAttr>GenerateCapturingMock</TypeWithInterfaceNoAttr>
+      </MyriadParams>
+    </Compile>
    <Compile Include="Vault.fs" />
    <Compile Include="GeneratedVault.fs">
      <MyriadFile>Vault.fs</MyriadFile>
@@ -51,14 +85,28 @@
    <Compile Include="ListCata.fs">
      <MyriadFile>List.fs</MyriadFile>
    </Compile>
+    <Compile Include="Args.fs" />
+    <Compile Include="GeneratedArgs.fs">
+      <MyriadFile>Args.fs</MyriadFile>
+    </Compile>
+    <None Include="swagger-gitea.json" />
+    <Compile Include="GeneratedSwaggerGitea.fs">
+      <MyriadFile>swagger-gitea.json</MyriadFile>
+      <MyriadParams>
+        <GenerateMockInternal>true</GenerateMockInternal>
+        <ClassName>Gitea</ClassName>
+      </MyriadParams>
+    </Compile>
+    <Compile Include="Generated2SwaggerGitea.fs">
+      <MyriadFile>GeneratedSwaggerGitea.fs</MyriadFile>
+    </Compile>
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="RestEase" Version="1.6.4"/>
    <ProjectReference Include="..\WoofWare.Myriad.Plugins.Attributes\WoofWare.Myriad.Plugins.Attributes.fsproj" />
-    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj"/>
-    <PackageReference Include="Myriad.Sdk" Version="0.8.3"/>
-    <PackageReference Include="Myriad.Core" Version="0.8.3"/>
+    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj" PrivateAssets="all" />
+    <PackageReference Include="Myriad.Sdk" Version="0.8.3" PrivateAssets="all" />
  </ItemGroup>

 </Project>
--- a/ConsumePlugin/FSharpForFunAndProfitCata.fs
+++ b/ConsumePlugin/FSharpForFunAndProfitCata.fs
@@ -30,6 +30,12 @@ type ChocolateType =
    | Milk
    | SeventyPercent

+    override this.ToString () =
+        match this with
+        | ChocolateType.Dark -> "Dark"
+        | ChocolateType.Milk -> "Milk"
+        | ChocolateType.SeventyPercent -> "SeventyPercent"
+
 type Chocolate =
    {
        chocType : ChocolateType
@@ -43,6 +49,12 @@ type WrappingPaperStyle =
    | HappyHolidays
    | SolidColor

+    override this.ToString () =
+        match this with
+        | WrappingPaperStyle.HappyBirthday -> "HappyBirthday"
+        | WrappingPaperStyle.HappyHolidays -> "HappyHolidays"
+        | WrappingPaperStyle.SolidColor -> "SolidColor"
+
 [<CreateCatamorphism "GiftCata">]
 type Gift =
    | Book of Book
--- a/ConsumePlugin/Generated2SwaggerGitea.fs
+++ b/ConsumePlugin/Generated2SwaggerGitea.fs
--- a/ConsumePlugin/GeneratedArgs.fs
+++ b/ConsumePlugin/GeneratedArgs.fs
--- a/ConsumePlugin/GeneratedCapturingMock.fs
+++ b/ConsumePlugin/GeneratedCapturingMock.fs
@@ -0,0 +1,562 @@
+//------------------------------------------------------------------------------
+//        This code was generated by myriad.
+//        Changes to this file will be lost when the code is regenerated.
+//------------------------------------------------------------------------------
+
+
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal PublicTypeMockCalls =
+    /// All the calls made to a PublicTypeMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+            Mem3 : ResizeArray<int * System.Threading.CancellationToken option>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal PublicTypeMock =
+    {
+        Calls : PublicTypeMockCalls.Calls
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * System.Threading.CancellationToken option -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PublicTypeMock =
+        {
+            Calls = PublicTypeMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicType with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+
+        member this.Mem3 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem3 (fun _ -> this.Calls.Mem3.Add (arg_0_0, arg_0_1))
+            this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module public PublicTypeInternalFalseMockCalls =
+    /// All the calls made to a PublicTypeInternalFalseMock mock
+    type public Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+            Mem3 : ResizeArray<int * System.Threading.CancellationToken option>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type public PublicTypeInternalFalseMock =
+    {
+        Calls : PublicTypeInternalFalseMockCalls.Calls
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * System.Threading.CancellationToken option -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PublicTypeInternalFalseMock =
+        {
+            Calls = PublicTypeInternalFalseMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicTypeInternalFalse with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+
+        member this.Mem3 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem3 (fun _ -> this.Calls.Mem3.Add (arg_0_0, arg_0_1))
+            this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal InternalTypeMockCalls =
+    /// All the calls made to a InternalTypeMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal InternalTypeMock =
+    {
+        Calls : InternalTypeMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : InternalTypeMock =
+        {
+            Calls = InternalTypeMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface InternalType with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal PrivateTypeMockCalls =
+    /// All the calls made to a PrivateTypeMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type private PrivateTypeMock =
+    {
+        Calls : PrivateTypeMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PrivateTypeMock =
+        {
+            Calls = PrivateTypeMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateType with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal PrivateTypeInternalFalseMockCalls =
+    /// All the calls made to a PrivateTypeInternalFalseMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type private PrivateTypeInternalFalseMock =
+    {
+        Calls : PrivateTypeInternalFalseMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PrivateTypeInternalFalseMock =
+        {
+            Calls = PrivateTypeInternalFalseMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateTypeInternalFalse with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal VeryPublicTypeMockCalls =
+    /// All the calls made to a VeryPublicTypeMock mock
+    type internal Calls<'a, 'b> =
+        {
+            Mem1 : ResizeArray<'a>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls<'a, 'b> =
+            {
+                Mem1 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal VeryPublicTypeMock<'a, 'b> =
+    {
+        Calls : VeryPublicTypeMockCalls.Calls<'a, 'b>
+        Mem1 : 'a -> 'b
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : VeryPublicTypeMock<'a, 'b> =
+        {
+            Calls = VeryPublicTypeMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+        }
+
+    interface VeryPublicType<'a, 'b> with
+        member this.Mem1 arg_0_0 =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0))
+            this.Mem1 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal CurriedMockCalls =
+    /// A single call to the Mem1 method
+    type internal Mem1Call<'a> =
+        {
+            bar : int
+            Arg1 : 'a
+        }
+
+    /// A single call to the Mem2 method
+    type internal Mem2Call<'a> =
+        {
+            Arg0 : int * string
+            baz : 'a
+        }
+
+    /// A single call to the Mem3 method
+    type internal Mem3Call<'a> =
+        {
+            quux : (int * string)
+            flurb : 'a
+        }
+
+    /// A single call to the Mem4 method
+    type internal Mem4Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// A single call to the Mem5 method
+    type internal Mem5Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// A single call to the Mem6 method
+    type internal Mem6Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// All the calls made to a CurriedMock mock
+    type internal Calls<'a> =
+        {
+            Mem1 : ResizeArray<Mem1Call<'a>>
+            Mem2 : ResizeArray<Mem2Call<'a>>
+            Mem3 : ResizeArray<Mem3Call<'a>>
+            Mem4 : ResizeArray<Mem4Call<'a>>
+            Mem5 : ResizeArray<Mem5Call<'a>>
+            Mem6 : ResizeArray<Mem6Call<'a>>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls<'a> =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+                Mem4 = ResizeArray ()
+                Mem5 = ResizeArray ()
+                Mem6 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal CurriedMock<'a> =
+    {
+        Calls : CurriedMockCalls.Calls<'a>
+        Mem1 : int -> 'a -> string
+        Mem2 : int * string -> 'a -> string
+        Mem3 : (int * string) -> 'a -> string
+        Mem4 : (int * string) -> ('a * int) -> string
+        Mem5 : int * string -> ('a * int) -> string
+        Mem6 : int * string -> 'a * int -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : CurriedMock<'a> =
+        {
+            Calls = CurriedMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+            Mem4 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem4"))
+            Mem5 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem5"))
+            Mem6 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem6"))
+        }
+
+    interface Curried<'a> with
+        member this.Mem1 arg_0_0 arg_1_0 =
+            lock
+                this.Calls.Mem1
+                (fun _ ->
+                    this.Calls.Mem1.Add
+                        {
+                            bar = arg_0_0
+                            Arg1 = arg_1_0
+                        }
+                )
+
+            this.Mem1 (arg_0_0) (arg_1_0)
+
+        member this.Mem2 (arg_0_0, arg_0_1) arg_1_0 =
+            lock
+                this.Calls.Mem2
+                (fun _ ->
+                    this.Calls.Mem2.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            baz = arg_1_0
+                        }
+                )
+
+            this.Mem2 (arg_0_0, arg_0_1) (arg_1_0)
+
+        member this.Mem3 arg_0_0 arg_1_0 =
+            lock
+                this.Calls.Mem3
+                (fun _ ->
+                    this.Calls.Mem3.Add
+                        {
+                            quux = arg_0_0
+                            flurb = arg_1_0
+                        }
+                )
+
+            this.Mem3 (arg_0_0) (arg_1_0)
+
+        member this.Mem4 ((arg_0_0, arg_0_1)) ((arg_1_0, arg_1_1)) =
+            lock
+                this.Calls.Mem4
+                (fun _ ->
+                    this.Calls.Mem4.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem4 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem5 (arg_0_0, arg_0_1) ((arg_1_0, arg_1_1)) =
+            lock
+                this.Calls.Mem5
+                (fun _ ->
+                    this.Calls.Mem5.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem5 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1) =
+            lock
+                this.Calls.Mem6
+                (fun _ ->
+                    this.Calls.Mem6.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal TypeWithInterfaceMockCalls =
+    /// All the calls made to a TypeWithInterfaceMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string option>
+            Mem2 : ResizeArray<unit>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal TypeWithInterfaceMock =
+    {
+        Calls : TypeWithInterfaceMockCalls.Calls
+        /// Implementation of IDisposable.Dispose
+        Dispose : unit -> unit
+        Mem1 : string option -> string[] Async
+        Mem2 : unit -> string[] Async
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : TypeWithInterfaceMock =
+        {
+            Calls = TypeWithInterfaceMockCalls.Calls.Empty ()
+            Dispose = (fun () -> ())
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface TypeWithInterface with
+        member this.Mem1 arg_0_0 =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0))
+            this.Mem1 (arg_0_0)
+
+        member this.Mem2 () =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (()))
+            this.Mem2 (())
+
+    interface System.IDisposable with
+        member this.Dispose () : unit = this.Dispose ()
+namespace SomeNamespace.CapturingMock
+
+open System
+open WoofWare.Myriad.Plugins
+
+[<RequireQualifiedAccess>]
+module internal TypeWithPropertiesMockCalls =
+    /// All the calls made to a TypeWithPropertiesMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string option>
+            Prop1 : ResizeArray<unit>
+            Prop2 : ResizeArray<unit>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Prop1 = ResizeArray ()
+                Prop2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal TypeWithPropertiesMock =
+    {
+        Calls : TypeWithPropertiesMockCalls.Calls
+        /// Implementation of IDisposable.Dispose
+        Dispose : unit -> unit
+        Mem1 : string option -> string[] Async
+        Prop1 : unit -> int
+        Prop2 : unit -> unit Async
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : TypeWithPropertiesMock =
+        {
+            Calls = TypeWithPropertiesMockCalls.Calls.Empty ()
+            Dispose = (fun () -> ())
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Prop1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Prop1"))
+            Prop2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Prop2"))
+        }
+
+    interface TypeWithProperties with
+        member this.Mem1 arg_0_0 =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0))
+            this.Mem1 (arg_0_0)
+
+        member this.Prop1 = this.Prop1 ()
+        member this.Prop2 = this.Prop2 ()
+
+    interface System.IDisposable with
+        member this.Dispose () : unit = this.Dispose ()
--- a/ConsumePlugin/GeneratedCapturingMockNoAttributes.fs
+++ b/ConsumePlugin/GeneratedCapturingMockNoAttributes.fs
@@ -0,0 +1,500 @@
+//------------------------------------------------------------------------------
+//        This code was generated by myriad.
+//        Changes to this file will be lost when the code is regenerated.
+//------------------------------------------------------------------------------
+
+
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal PublicTypeNoAttrMockCalls =
+    /// All the calls made to a PublicTypeNoAttrMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+            Mem3 : ResizeArray<int * System.Threading.CancellationToken option>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal PublicTypeNoAttrMock =
+    {
+        Calls : PublicTypeNoAttrMockCalls.Calls
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * System.Threading.CancellationToken option -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PublicTypeNoAttrMock =
+        {
+            Calls = PublicTypeNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+
+        member this.Mem3 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem3 (fun _ -> this.Calls.Mem3.Add (arg_0_0, arg_0_1))
+            this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module public PublicTypeInternalFalseNoAttrMockCalls =
+    /// All the calls made to a PublicTypeInternalFalseNoAttrMock mock
+    type public Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+            Mem3 : ResizeArray<int * System.Threading.CancellationToken option>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type public PublicTypeInternalFalseNoAttrMock =
+    {
+        Calls : PublicTypeInternalFalseNoAttrMockCalls.Calls
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * System.Threading.CancellationToken option -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PublicTypeInternalFalseNoAttrMock =
+        {
+            Calls = PublicTypeInternalFalseNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicTypeInternalFalseNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+
+        member this.Mem3 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem3 (fun _ -> this.Calls.Mem3.Add (arg_0_0, arg_0_1))
+            this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal InternalTypeNoAttrMockCalls =
+    /// All the calls made to a InternalTypeNoAttrMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal InternalTypeNoAttrMock =
+    {
+        Calls : InternalTypeNoAttrMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : InternalTypeNoAttrMock =
+        {
+            Calls = InternalTypeNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface InternalTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal PrivateTypeNoAttrMockCalls =
+    /// All the calls made to a PrivateTypeNoAttrMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type private PrivateTypeNoAttrMock =
+    {
+        Calls : PrivateTypeNoAttrMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PrivateTypeNoAttrMock =
+        {
+            Calls = PrivateTypeNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal PrivateTypeInternalFalseNoAttrMockCalls =
+    /// All the calls made to a PrivateTypeInternalFalseNoAttrMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string * int>
+            Mem2 : ResizeArray<string>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type private PrivateTypeInternalFalseNoAttrMock =
+    {
+        Calls : PrivateTypeInternalFalseNoAttrMockCalls.Calls
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : PrivateTypeInternalFalseNoAttrMock =
+        {
+            Calls = PrivateTypeInternalFalseNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateTypeInternalFalseNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0, arg_0_1))
+            this.Mem1 (arg_0_0, arg_0_1)
+
+        member this.Mem2 arg_0_0 =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (arg_0_0))
+            this.Mem2 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal VeryPublicTypeNoAttrMockCalls =
+    /// All the calls made to a VeryPublicTypeNoAttrMock mock
+    type internal Calls<'a, 'b> =
+        {
+            Mem1 : ResizeArray<'a>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls<'a, 'b> =
+            {
+                Mem1 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal VeryPublicTypeNoAttrMock<'a, 'b> =
+    {
+        Calls : VeryPublicTypeNoAttrMockCalls.Calls<'a, 'b>
+        Mem1 : 'a -> 'b
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : VeryPublicTypeNoAttrMock<'a, 'b> =
+        {
+            Calls = VeryPublicTypeNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+        }
+
+    interface VeryPublicTypeNoAttr<'a, 'b> with
+        member this.Mem1 arg_0_0 =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0))
+            this.Mem1 (arg_0_0)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal CurriedNoAttrMockCalls =
+    /// A single call to the Mem1 method
+    type internal Mem1Call<'a> =
+        {
+            Arg0 : int
+            Arg1 : 'a
+        }
+
+    /// A single call to the Mem2 method
+    type internal Mem2Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a
+        }
+
+    /// A single call to the Mem3 method
+    type internal Mem3Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a
+        }
+
+    /// A single call to the Mem4 method
+    type internal Mem4Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// A single call to the Mem5 method
+    type internal Mem5Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// A single call to the Mem6 method
+    type internal Mem6Call<'a> =
+        {
+            Arg0 : int * string
+            Arg1 : 'a * int
+        }
+
+    /// All the calls made to a CurriedNoAttrMock mock
+    type internal Calls<'a> =
+        {
+            Mem1 : ResizeArray<Mem1Call<'a>>
+            Mem2 : ResizeArray<Mem2Call<'a>>
+            Mem3 : ResizeArray<Mem3Call<'a>>
+            Mem4 : ResizeArray<Mem4Call<'a>>
+            Mem5 : ResizeArray<Mem5Call<'a>>
+            Mem6 : ResizeArray<Mem6Call<'a>>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls<'a> =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+                Mem3 = ResizeArray ()
+                Mem4 = ResizeArray ()
+                Mem5 = ResizeArray ()
+                Mem6 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal CurriedNoAttrMock<'a> =
+    {
+        Calls : CurriedNoAttrMockCalls.Calls<'a>
+        Mem1 : int -> 'a -> string
+        Mem2 : int * string -> 'a -> string
+        Mem3 : (int * string) -> 'a -> string
+        Mem4 : (int * string) -> ('a * int) -> string
+        Mem5 : int * string -> ('a * int) -> string
+        Mem6 : int * string -> 'a * int -> string
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : CurriedNoAttrMock<'a> =
+        {
+            Calls = CurriedNoAttrMockCalls.Calls.Empty ()
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+            Mem4 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem4"))
+            Mem5 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem5"))
+            Mem6 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem6"))
+        }
+
+    interface CurriedNoAttr<'a> with
+        member this.Mem1 arg_0_0 arg_1_0 =
+            lock
+                this.Calls.Mem1
+                (fun _ ->
+                    this.Calls.Mem1.Add
+                        {
+                            Arg0 = arg_0_0
+                            Arg1 = arg_1_0
+                        }
+                )
+
+            this.Mem1 (arg_0_0) (arg_1_0)
+
+        member this.Mem2 (arg_0_0, arg_0_1) arg_1_0 =
+            lock
+                this.Calls.Mem2
+                (fun _ ->
+                    this.Calls.Mem2.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0
+                        }
+                )
+
+            this.Mem2 (arg_0_0, arg_0_1) (arg_1_0)
+
+        member this.Mem3 ((arg_0_0, arg_0_1)) arg_1_0 =
+            lock
+                this.Calls.Mem3
+                (fun _ ->
+                    this.Calls.Mem3.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0
+                        }
+                )
+
+            this.Mem3 (arg_0_0, arg_0_1) (arg_1_0)
+
+        member this.Mem4 ((arg_0_0, arg_0_1)) ((arg_1_0, arg_1_1)) =
+            lock
+                this.Calls.Mem4
+                (fun _ ->
+                    this.Calls.Mem4.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem4 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem5 (arg_0_0, arg_0_1) ((arg_1_0, arg_1_1)) =
+            lock
+                this.Calls.Mem5
+                (fun _ ->
+                    this.Calls.Mem5.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem5 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1) =
+            lock
+                this.Calls.Mem6
+                (fun _ ->
+                    this.Calls.Mem6.Add
+                        {
+                            Arg0 = arg_0_0, arg_0_1
+                            Arg1 = arg_1_0, arg_1_1
+                        }
+                )
+
+            this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+namespace SomeNamespace.CapturingMock
+
+open System
+
+[<RequireQualifiedAccess>]
+module internal TypeWithInterfaceNoAttrMockCalls =
+    /// All the calls made to a TypeWithInterfaceNoAttrMock mock
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<string option>
+            Mem2 : ResizeArray<unit>
+        }
+
+        /// A fresh calls object which has not yet had any calls made.
+        static member Empty () : Calls =
+            {
+                Mem1 = ResizeArray ()
+                Mem2 = ResizeArray ()
+            }
+
+/// Mock record type for an interface
+type internal TypeWithInterfaceNoAttrMock =
+    {
+        Calls : TypeWithInterfaceNoAttrMockCalls.Calls
+        /// Implementation of IDisposable.Dispose
+        Dispose : unit -> unit
+        Mem1 : string option -> string[] Async
+        Mem2 : unit -> string[] Async
+    }
+
+    /// An implementation where every non-unit method throws.
+    static member Empty () : TypeWithInterfaceNoAttrMock =
+        {
+            Calls = TypeWithInterfaceNoAttrMockCalls.Calls.Empty ()
+            Dispose = (fun () -> ())
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface TypeWithInterfaceNoAttr with
+        member this.Mem1 arg_0_0 =
+            lock this.Calls.Mem1 (fun _ -> this.Calls.Mem1.Add (arg_0_0))
+            this.Mem1 (arg_0_0)
+
+        member this.Mem2 () =
+            lock this.Calls.Mem2 (fun _ -> this.Calls.Mem2.Add (()))
+            this.Mem2 (())
+
+    interface System.IDisposable with
+        member this.Dispose () : unit = this.Dispose ()
--- a/ConsumePlugin/GeneratedCatamorphism.fs
+++ b/ConsumePlugin/GeneratedCatamorphism.fs
@@ -7,6 +7,7 @@



+
 namespace ConsumePlugin

 open WoofWare.Myriad.Plugins
@@ -92,13 +93,13 @@ module TreeCata =
                let arg0_0 = treeStack.[treeStack.Count - 1]
                treeStack.RemoveAt (treeStack.Count - 1)
                cata.TreeBuilder.Parent arg0_0 |> treeBuilderStack.Add
-            | Instruction.Tree_Pair (arg2_0) ->
+            | Instruction.Tree_Pair arg2_0 ->
                let arg0_0 = treeStack.[treeStack.Count - 1]
                treeStack.RemoveAt (treeStack.Count - 1)
                let arg1_0 = treeStack.[treeStack.Count - 1]
                treeStack.RemoveAt (treeStack.Count - 1)
                cata.Tree.Pair arg0_0 arg1_0 arg2_0 |> treeStack.Add
-            | Instruction.Tree_Sequential (arg0_0) ->
+            | Instruction.Tree_Sequential arg0_0 ->
                let arg0_0_len = arg0_0

                let arg0_0 =
--- a/ConsumePlugin/GeneratedFileSystem.fs
+++ b/ConsumePlugin/GeneratedFileSystem.fs
@@ -7,6 +7,7 @@



+
 namespace ConsumePlugin

 open WoofWare.Myriad.Plugins
@@ -31,7 +32,7 @@ module FileSystemItemCata =
    [<RequireQualifiedAccess>]
    type private Instruction =
        | Process__FileSystemItem of FileSystemItem
-        | FileSystemItem_Directory of string * int * int
+        | FileSystemItem_Directory of name : string * dirSize : int * contents : int

    let private loop (cata : FileSystemCata<'FileSystemItem>) (instructions : ResizeArray<Instruction>) =
        let fileSystemItemStack = ResizeArray<'FileSystemItem> ()
@@ -106,7 +107,7 @@ module GiftCata =
        | Process__Gift of Gift
        | Gift_Wrapped of WrappingPaperStyle
        | Gift_Boxed
-        | Gift_WithACard of string
+        | Gift_WithACard of message : string

    let private loop (cata : GiftCata<'Gift>) (instructions : ResizeArray<Instruction>) =
        let giftStack = ResizeArray<'Gift> ()
@@ -129,7 +130,7 @@ module GiftCata =
                | Gift.WithACard (arg0_0, message) ->
                    instructions.Add (Instruction.Gift_WithACard (message))
                    instructions.Add (Instruction.Process__Gift arg0_0)
-            | Instruction.Gift_Wrapped (arg1_0) ->
+            | Instruction.Gift_Wrapped arg1_0 ->
                let arg0_0 = giftStack.[giftStack.Count - 1]
                giftStack.RemoveAt (giftStack.Count - 1)
                cata.Gift.Wrapped arg0_0 arg1_0 |> giftStack.Add
@@ -137,7 +138,7 @@ module GiftCata =
                let arg0_0 = giftStack.[giftStack.Count - 1]
                giftStack.RemoveAt (giftStack.Count - 1)
                cata.Gift.Boxed arg0_0 |> giftStack.Add
-            | Instruction.Gift_WithACard (message) ->
+            | Instruction.Gift_WithACard message ->
                let arg0_0 = giftStack.[giftStack.Count - 1]
                giftStack.RemoveAt (giftStack.Count - 1)
                cata.Gift.WithACard arg0_0 message |> giftStack.Add
--- a/ConsumePlugin/GeneratedJson.fs
+++ b/ConsumePlugin/GeneratedJson.fs
@@ -5,122 +5,241 @@



+namespace ConsumePlugin
+
+open System.Text.Json.Serialization
+
+/// Module containing JSON serializing methods for the InternalTypeNotExtensionSerial type
+[<RequireQualifiedAccess ; CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
+module internal InternalTypeNotExtensionSerial =
+    /// Serialize to a JSON node
+    let toJsonNode (input : InternalTypeNotExtensionSerial) : System.Text.Json.Nodes.JsonNode =
+        let node = System.Text.Json.Nodes.JsonObject ()
+
+        do
+            node.Add (
+                (Literals.something),
+                (input.InternalThing2
+                 |> (fun field ->
+                     let field = System.Text.Json.Nodes.JsonValue.Create<string> field
+
+                     (match field with
+                      | null ->
+                          raise (
+                              System.ArgumentNullException
+                                  "Expected type string to be non-null, but received a null value when serialising"
+                          )
+                      | field -> field)
+                 ))
+            )
+
+        node :> _
+namespace ConsumePlugin
+
+open System.Text.Json.Serialization
+
+/// Module containing JSON serializing extension members for the InternalTypeExtension type
+[<AutoOpen>]
+module internal InternalTypeExtensionJsonSerializeExtension =
+    /// Extension methods for JSON parsing
+    type InternalTypeExtension with
+
+        /// Serialize to a JSON node
+        static member toJsonNode (input : InternalTypeExtension) : System.Text.Json.Nodes.JsonNode =
+            let node = System.Text.Json.Nodes.JsonObject ()
+
+            do
+                node.Add (
+                    (Literals.something),
+                    (input.ExternalThing
+                     |> (fun field ->
+                         let field = System.Text.Json.Nodes.JsonValue.Create<string> field
+
+                         (match field with
+                          | null ->
+                              raise (
+                                  System.ArgumentNullException
+                                      "Expected type string to be non-null, but received a null value when serialising"
+                              )
+                          | field -> field)
+                     ))
+                )
+
+            node :> _
+
 namespace ConsumePlugin

 /// Module containing JSON parsing methods for the InnerType type
-[<RequireQualifiedAccess>]
-[<CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
+[<RequireQualifiedAccess ; CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
 module InnerType =
    /// Parse from a JSON node.
    let jsonParse (node : System.Text.Json.Nodes.JsonNode) : InnerType =
-        let Thing =
-            (match node.[(Literals.something)] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ((Literals.something))
-                     )
-                 )
-             | v -> v)
-                .AsValue()
-                .GetValue<string> ()
+        let arg_0 =
+            match node.[(Literals.something)] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ((Literals.something))
+                    )
+                )
+            | Some node -> node.AsValue().GetValue<System.String> ()

        {
-            Thing = Thing
+            Thing = arg_0
        }
 namespace ConsumePlugin

 /// Module containing JSON parsing methods for the JsonRecordType type
-[<RequireQualifiedAccess>]
-[<CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
+[<RequireQualifiedAccess ; CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
 module JsonRecordType =
    /// Parse from a JSON node.
    let jsonParse (node : System.Text.Json.Nodes.JsonNode) : JsonRecordType =
-        let F =
-            (match node.["f"] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ("f")
-                     )
-                 )
-             | v -> v)
-                .AsArray ()
-            |> Seq.map (fun elt -> elt.AsValue().GetValue<int> ())
-            |> Array.ofSeq
-
-        let E =
-            (match node.["e"] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ("e")
-                     )
-                 )
-             | v -> v)
-                .AsArray ()
-            |> Seq.map (fun elt -> elt.AsValue().GetValue<string> ())
-            |> Array.ofSeq
-
-        let D =
-            InnerType.jsonParse (
-                match node.["d"] with
-                | null ->
-                    raise (
-                        System.Collections.Generic.KeyNotFoundException (
-                            sprintf "Required key '%s' not found on JSON object" ("d")
-                        )
+        let arg_5 =
+            match node.["f"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("f")
                    )
-                | v -> v
-            )
+                )
+            | Some node ->
+                node.AsArray ()
+                |> Seq.map (fun elt ->
+                    (match elt with
+                     | null ->
+                         raise (
+                             System.ArgumentNullException
+                                 "Expected element of array (element type int32) to be non-null, but found a null element"
+                         )
+                     | elt -> elt.AsValue().GetValue<System.Int32> ())
+                )
+                |> Array.ofSeq

-        let C =
-            (match node.["hi"] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ("hi")
-                     )
-                 )
-             | v -> v)
-                .AsArray ()
-            |> Seq.map (fun elt -> elt.AsValue().GetValue<int> ())
-            |> List.ofSeq
+        let arg_4 =
+            match node.["e"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("e")
+                    )
+                )
+            | Some node ->
+                node.AsArray ()
+                |> Seq.map (fun elt ->
+                    (match elt with
+                     | null ->
+                         raise (
+                             System.ArgumentNullException
+                                 "Expected element of array (element type string) to be non-null, but found a null element"
+                         )
+                     | elt -> elt.AsValue().GetValue<System.String> ())
+                )
+                |> Array.ofSeq

-        let B =
-            (match node.["another-thing"] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ("another-thing")
-                     )
-                 )
-             | v -> v)
-                .AsValue()
-                .GetValue<string> ()
+        let arg_3 =
+            match node.["d"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("d")
+                    )
+                )
+            | Some node -> InnerType.jsonParse node

-        let A =
-            (match node.["a"] with
-             | null ->
-                 raise (
-                     System.Collections.Generic.KeyNotFoundException (
-                         sprintf "Required key '%s' not found on JSON object" ("a")
-                     )
-                 )
-             | v -> v)
-                .AsValue()
-                .GetValue<int> ()
+        let arg_2 =
+            match node.["hi"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("hi")
+                    )
+                )
+            | Some node ->
+                node.AsArray ()
+                |> Seq.map (fun elt ->
+                    (match elt with
+                     | null ->
+                         raise (
+                             System.ArgumentNullException
+                                 "Expected element of array (element type int32) to be non-null, but found a null element"
+                         )
+                     | elt -> elt.AsValue().GetValue<System.Int32> ())
+                )
+                |> List.ofSeq
+
+        let arg_1 =
+            match node.["another-thing"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("another-thing")
+                    )
+                )
+            | Some node -> node.AsValue().GetValue<System.String> ()
+
+        let arg_0 =
+            match node.["a"] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ("a")
+                    )
+                )
+            | Some node -> node.AsValue().GetValue<System.Int32> ()

        {
-            A = A
-            B = B
-            C = C
-            D = D
-            E = E
-            F = F
+            A = arg_0
+            B = arg_1
+            C = arg_2
+            D = arg_3
+            E = arg_4
+            F = arg_5
        }
 namespace ConsumePlugin

+/// Module containing JSON parsing methods for the InternalTypeNotExtension type
+[<RequireQualifiedAccess ; CompilationRepresentation(CompilationRepresentationFlags.ModuleSuffix)>]
+module internal InternalTypeNotExtension =
+    /// Parse from a JSON node.
+    let jsonParse (node : System.Text.Json.Nodes.JsonNode) : InternalTypeNotExtension =
+        let arg_0 =
+            match node.[(Literals.something)] |> Option.ofObj with
+            | None ->
+                raise (
+                    System.Collections.Generic.KeyNotFoundException (
+                        sprintf "Required key '%s' not found on JSON object" ((Literals.something))
+                    )
+                )
+            | Some node -> node.AsValue().GetValue<System.String> ()
+
+        {
+            InternalThing = arg_0
+        }
+namespace ConsumePlugin
+
+/// Module containing JSON parsing extension members for the InternalTypeExtension type
+[<AutoOpen>]
+module internal InternalTypeExtensionJsonParseExtension =
+    /// Extension methods for JSON parsing
+    type InternalTypeExtension with
+
+        /// Parse from a JSON node.
+        static member jsonParse (node : System.Text.Json.Nodes.JsonNode) : InternalTypeExtension =
+            let arg_0 =
+                match node.[(Literals.something)] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ((Literals.something))
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.String> ()
+
+            {
+                ExternalThing = arg_0
+            }
+namespace ConsumePlugin
+
 /// Module containing JSON parsing extension members for the ToGetExtensionMethod type
 [<AutoOpen>]
 module ToGetExtensionMethodJsonParseExtension =
@@ -129,58 +248,236 @@ module ToGetExtensionMethodJsonParseExtension =

        /// Parse from a JSON node.
        static member jsonParse (node : System.Text.Json.Nodes.JsonNode) : ToGetExtensionMethod =
-            let Sailor =
-                (match node.["sailor"] with
-                 | null ->
-                     raise (
-                         System.Collections.Generic.KeyNotFoundException (
-                             sprintf "Required key '%s' not found on JSON object" ("sailor")
-                         )
-                     )
-                 | v -> v)
-                    .AsValue()
-                    .GetValue<float> ()
+            let arg_20 =
+                match node.["whiskey"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("whiskey")
+                        )
+                    )
+                | Some node -> System.Numerics.BigInteger.Parse (node.ToJsonString ())

-            let Soldier =
-                (match node.["soldier"] with
-                 | null ->
-                     raise (
-                         System.Collections.Generic.KeyNotFoundException (
-                             sprintf "Required key '%s' not found on JSON object" ("soldier")
-                         )
-                     )
-                 | v -> v)
-                    .AsValue()
-                    .GetValue<string> ()
-                |> System.Uri
+            let arg_19 =
+                match node.["victor"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("victor")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Char> ()

-            let Tailor =
-                (match node.["tailor"] with
-                 | null ->
-                     raise (
-                         System.Collections.Generic.KeyNotFoundException (
-                             sprintf "Required key '%s' not found on JSON object" ("tailor")
-                         )
-                     )
-                 | v -> v)
-                    .AsValue()
-                    .GetValue<int> ()
+            let arg_18 =
+                match node.["uniform"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("uniform")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Decimal> ()

-            let Tinker =
-                (match node.["tinker"] with
-                 | null ->
-                     raise (
-                         System.Collections.Generic.KeyNotFoundException (
-                             sprintf "Required key '%s' not found on JSON object" ("tinker")
-                         )
-                     )
-                 | v -> v)
-                    .AsValue()
-                    .GetValue<string> ()
+            let arg_17 =
+                match node.["tango"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("tango")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.SByte> ()
+
+            let arg_16 =
+                match node.["quebec"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("quebec")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Byte> ()
+
+            let arg_15 =
+                match node.["papa"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("papa")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Byte> ()
+
+            let arg_14 =
+                match node.["oscar"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("oscar")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.SByte> ()
+
+            let arg_13 =
+                match node.["november"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("november")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.UInt16> ()
+
+            let arg_12 =
+                match node.["mike"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("mike")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Int16> ()
+
+            let arg_11 =
+                match node.["lima"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("lima")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.UInt32> ()
+
+            let arg_10 =
+                match node.["kilo"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("kilo")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Int32> ()
+
+            let arg_9 =
+                match node.["juliette"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("juliette")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.UInt32> ()
+
+            let arg_8 =
+                match node.["india"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("india")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Int32> ()
+
+            let arg_7 =
+                match node.["hotel"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("hotel")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.UInt64> ()
+
+            let arg_6 =
+                match node.["golf"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("golf")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Int64> ()
+
+            let arg_5 =
+                match node.["foxtrot"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("foxtrot")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Double> ()
+
+            let arg_4 =
+                match node.["echo"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("echo")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Single> ()
+
+            let arg_3 =
+                match node.["delta"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("delta")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Single> ()
+
+            let arg_2 =
+                match node.["charlie"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("charlie")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.Double> ()
+
+            let arg_1 =
+                match node.["bravo"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("bravo")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<string> () |> System.Uri
+
+            let arg_0 =
+                match node.["alpha"] |> Option.ofObj with
+                | None ->
+                    raise (
+                        System.Collections.Generic.KeyNotFoundException (
+                            sprintf "Required key '%s' not found on JSON object" ("alpha")
+                        )
+                    )
+                | Some node -> node.AsValue().GetValue<System.String> ()

            {
-                Tinker = Tinker
-                Tailor = Tailor
-                Soldier = Soldier
-                Sailor = Sailor
+                Alpha = arg_0
+                Bravo = arg_1
+                Charlie = arg_2
+                Delta = arg_3
+                Echo = arg_4
+                Foxtrot = arg_5
+                Golf = arg_6
+                Hotel = arg_7
+                India = arg_8
+                Juliette = arg_9
+                Kilo = arg_10
+                Lima = arg_11
+                Mike = arg_12
+                November = arg_13
+                Oscar = arg_14
+                Papa = arg_15
+                Quebec = arg_16
+                Tango = arg_17
+                Uniform = arg_18
+                Victor = arg_19
+                Whiskey = arg_20
            }
--- a/ConsumePlugin/GeneratedMock.fs
+++ b/ConsumePlugin/GeneratedMock.fs
@@ -19,9 +19,9 @@ type internal PublicTypeMock =
    /// An implementation where every method throws.
    static member Empty : PublicTypeMock =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem3 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
        }

    interface IPublicType with
@@ -44,9 +44,9 @@ type public PublicTypeInternalFalseMock =
    /// An implementation where every method throws.
    static member Empty : PublicTypeInternalFalseMock =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem3 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
        }

    interface IPublicTypeInternalFalse with
@@ -68,8 +68,8 @@ type internal InternalTypeMock =
    /// An implementation where every method throws.
    static member Empty : InternalTypeMock =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
        }

    interface InternalType with
@@ -90,8 +90,8 @@ type private PrivateTypeMock =
    /// An implementation where every method throws.
    static member Empty : PrivateTypeMock =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
        }

    interface PrivateType with
@@ -112,8 +112,8 @@ type private PrivateTypeInternalFalseMock =
    /// An implementation where every method throws.
    static member Empty : PrivateTypeInternalFalseMock =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
        }

    interface PrivateTypeInternalFalse with
@@ -133,7 +133,7 @@ type internal VeryPublicTypeMock<'a, 'b> =
    /// An implementation where every method throws.
    static member Empty () : VeryPublicTypeMock<'a, 'b> =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
        }

    interface VeryPublicType<'a, 'b> with
@@ -157,12 +157,12 @@ type internal CurriedMock<'a> =
    /// An implementation where every method throws.
    static member Empty () : CurriedMock<'a> =
        {
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem3 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem4 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem5 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem6 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+            Mem4 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem4"))
+            Mem5 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem5"))
+            Mem6 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem6"))
        }

    interface Curried<'a> with
@@ -195,9 +195,9 @@ type internal TypeWithInterfaceMock =
    /// An implementation where every method throws.
    static member Empty : TypeWithInterfaceMock =
        {
-            Dispose = (fun _ -> ())
-            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
-            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Dispose = (fun () -> ())
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
        }

    interface TypeWithInterface with
@@ -206,3 +206,34 @@ type internal TypeWithInterfaceMock =

    interface System.IDisposable with
        member this.Dispose () : unit = this.Dispose ()
+namespace SomeNamespace
+
+open System
+open WoofWare.Myriad.Plugins
+
+/// Mock record type for an interface
+type internal TypeWithPropertiesMock =
+    {
+        /// Implementation of IDisposable.Dispose
+        Dispose : unit -> unit
+        Prop1 : unit -> int
+        Prop2 : unit -> unit Async
+        Mem1 : string option -> string[] Async
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : TypeWithPropertiesMock =
+        {
+            Dispose = (fun () -> ())
+            Prop1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Prop1"))
+            Prop2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Prop2"))
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+        }
+
+    interface TypeWithProperties with
+        member this.Mem1 arg_0_0 = this.Mem1 (arg_0_0)
+        member this.Prop1 = this.Prop1 ()
+        member this.Prop2 = this.Prop2 ()
+
+    interface System.IDisposable with
+        member this.Dispose () : unit = this.Dispose ()
--- a/ConsumePlugin/GeneratedMockNoAttributes.fs
+++ b/ConsumePlugin/GeneratedMockNoAttributes.fs
@@ -0,0 +1,200 @@
+//------------------------------------------------------------------------------
+//        This code was generated by myriad.
+//        Changes to this file will be lost when the code is regenerated.
+//------------------------------------------------------------------------------
+
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type internal PublicTypeNoAttrMock =
+    {
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * option<System.Threading.CancellationToken> -> string
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : PublicTypeNoAttrMock =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) = this.Mem1 (arg_0_0, arg_0_1)
+        member this.Mem2 arg_0_0 = this.Mem2 (arg_0_0)
+        member this.Mem3 (arg_0_0, arg_0_1) = this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type public PublicTypeInternalFalseNoAttrMock =
+    {
+        Mem1 : string * int -> string list
+        Mem2 : string -> int
+        Mem3 : int * option<System.Threading.CancellationToken> -> string
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : PublicTypeInternalFalseNoAttrMock =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+        }
+
+    interface IPublicTypeInternalFalseNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) = this.Mem1 (arg_0_0, arg_0_1)
+        member this.Mem2 arg_0_0 = this.Mem2 (arg_0_0)
+        member this.Mem3 (arg_0_0, arg_0_1) = this.Mem3 (arg_0_0, arg_0_1)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type internal InternalTypeNoAttrMock =
+    {
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : InternalTypeNoAttrMock =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface InternalTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) = this.Mem1 (arg_0_0, arg_0_1)
+        member this.Mem2 arg_0_0 = this.Mem2 (arg_0_0)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type private PrivateTypeNoAttrMock =
+    {
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : PrivateTypeNoAttrMock =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateTypeNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) = this.Mem1 (arg_0_0, arg_0_1)
+        member this.Mem2 arg_0_0 = this.Mem2 (arg_0_0)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type private PrivateTypeInternalFalseNoAttrMock =
+    {
+        Mem1 : string * int -> unit
+        Mem2 : string -> int
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : PrivateTypeInternalFalseNoAttrMock =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface PrivateTypeInternalFalseNoAttr with
+        member this.Mem1 (arg_0_0, arg_0_1) = this.Mem1 (arg_0_0, arg_0_1)
+        member this.Mem2 arg_0_0 = this.Mem2 (arg_0_0)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type internal VeryPublicTypeNoAttrMock<'a, 'b> =
+    {
+        Mem1 : 'a -> 'b
+    }
+
+    /// An implementation where every method throws.
+    static member Empty () : VeryPublicTypeNoAttrMock<'a, 'b> =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+        }
+
+    interface VeryPublicTypeNoAttr<'a, 'b> with
+        member this.Mem1 arg_0_0 = this.Mem1 (arg_0_0)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type internal CurriedNoAttrMock<'a> =
+    {
+        Mem1 : int -> 'a -> string
+        Mem2 : int * string -> 'a -> string
+        Mem3 : (int * string) -> 'a -> string
+        Mem4 : (int * string) -> ('a * int) -> string
+        Mem5 : int * string -> ('a * int) -> string
+        Mem6 : int * string -> 'a * int -> string
+    }
+
+    /// An implementation where every method throws.
+    static member Empty () : CurriedNoAttrMock<'a> =
+        {
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+            Mem3 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem3"))
+            Mem4 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem4"))
+            Mem5 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem5"))
+            Mem6 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem6"))
+        }
+
+    interface CurriedNoAttr<'a> with
+        member this.Mem1 arg_0_0 arg_1_0 = this.Mem1 (arg_0_0) (arg_1_0)
+        member this.Mem2 (arg_0_0, arg_0_1) arg_1_0 = this.Mem2 (arg_0_0, arg_0_1) (arg_1_0)
+        member this.Mem3 ((arg_0_0, arg_0_1)) arg_1_0 = this.Mem3 (arg_0_0, arg_0_1) (arg_1_0)
+
+        member this.Mem4 ((arg_0_0, arg_0_1)) ((arg_1_0, arg_1_1)) =
+            this.Mem4 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem5 (arg_0_0, arg_0_1) ((arg_1_0, arg_1_1)) =
+            this.Mem5 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+
+        member this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1) =
+            this.Mem6 (arg_0_0, arg_0_1) (arg_1_0, arg_1_1)
+namespace SomeNamespace
+
+open System
+
+/// Mock record type for an interface
+type internal TypeWithInterfaceNoAttrMock =
+    {
+        /// Implementation of IDisposable.Dispose
+        Dispose : unit -> unit
+        Mem1 : string option -> string[] Async
+        Mem2 : unit -> string[] Async
+    }
+
+    /// An implementation where every method throws.
+    static member Empty : TypeWithInterfaceNoAttrMock =
+        {
+            Dispose = (fun () -> ())
+            Mem1 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem1"))
+            Mem2 = (fun _ -> raise (System.NotImplementedException "Unimplemented mock function: Mem2"))
+        }
+
+    interface TypeWithInterfaceNoAttr with
+        member this.Mem1 arg_0_0 = this.Mem1 (arg_0_0)
+        member this.Mem2 () = this.Mem2 (())
+
+    interface System.IDisposable with
+        member this.Dispose () : unit = this.Dispose ()
--- a/ConsumePlugin/GeneratedPureGymDto.fs
+++ b/ConsumePlugin/GeneratedPureGymDto.fs
--- a/ConsumePlugin/GeneratedRestClient.fs
+++ b/ConsumePlugin/GeneratedRestClient.fs
--- a/ConsumePlugin/GeneratedSerde.fs
+++ b/ConsumePlugin/GeneratedSerde.fs
--- a/ConsumePlugin/GeneratedSwaggerGitea.fs
+++ b/ConsumePlugin/GeneratedSwaggerGitea.fs
--- a/ConsumePlugin/GeneratedVault.fs
+++ b/ConsumePlugin/GeneratedVault.fs
--- a/ConsumePlugin/JsonRecord.fs
+++ b/ConsumePlugin/JsonRecord.fs
@@ -29,13 +29,52 @@ type JsonRecordType =
        F : int[]
    }

+[<WoofWare.Myriad.Plugins.JsonParse>]
+type internal InternalTypeNotExtension =
+    {
+        [<JsonPropertyName(Literals.something)>]
+        InternalThing : string
+    }
+
+[<WoofWare.Myriad.Plugins.JsonSerialize>]
+type internal InternalTypeNotExtensionSerial =
+    {
+        [<JsonPropertyName(Literals.something)>]
+        InternalThing2 : string
+    }
+
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+type internal InternalTypeExtension =
+    {
+        [<JsonPropertyName(Literals.something)>]
+        ExternalThing : string
+    }
+
 [<WoofWare.Myriad.Plugins.JsonParse true>]
 type ToGetExtensionMethod =
    {
-        Tinker : string
-        Tailor : int
-        Soldier : System.Uri
-        Sailor : float
+        Alpha : string
+        Bravo : System.Uri
+        Charlie : float
+        Delta : float32
+        Echo : single
+        Foxtrot : double
+        Golf : int64
+        Hotel : uint64
+        India : int
+        Juliette : uint
+        Kilo : int32
+        Lima : uint32
+        Mike : int16
+        November : uint16
+        Oscar : int8
+        Papa : uint8
+        Quebec : byte
+        Tango : sbyte
+        Uniform : decimal
+        Victor : char
+        Whiskey : bigint
    }

 [<RequireQualifiedAccess>]
--- a/ConsumePlugin/ListCata.fs
+++ b/ConsumePlugin/ListCata.fs
@@ -7,6 +7,7 @@



+
 namespace ConsumePlugin

 open WoofWare.Myriad.Plugins
@@ -31,7 +32,7 @@ module MyListCata =
    [<RequireQualifiedAccess>]
    type private Instruction<'a> =
        | Process__MyList of MyList<'a>
-        | MyList_Cons of 'a
+        | MyList_Cons of head : 'a

    let private loop (cata : MyListCata<'a, 'MyList>) (instructions : ResizeArray<Instruction<'a>>) =
        let myListStack = ResizeArray<'MyList> ()
@@ -50,7 +51,7 @@ module MyListCata =
                               }) ->
                    instructions.Add (Instruction.MyList_Cons (head))
                    instructions.Add (Instruction.Process__MyList tail)
-            | Instruction.MyList_Cons (head) ->
+            | Instruction.MyList_Cons head ->
                let tail = myListStack.[myListStack.Count - 1]
                myListStack.RemoveAt (myListStack.Count - 1)
                cata.MyList.Cons head tail |> myListStack.Add
@@ -103,7 +104,7 @@ module MyList2Cata =
                | MyList2.Cons (arg0_0, arg1_0) ->
                    instructions.Add (Instruction.MyList2_Cons (arg0_0))
                    instructions.Add (Instruction.Process__MyList2 arg1_0)
-            | Instruction.MyList2_Cons (arg0_0) ->
+            | Instruction.MyList2_Cons arg0_0 ->
                let arg1_0 = myList2Stack.[myList2Stack.Count - 1]
                myList2Stack.RemoveAt (myList2Stack.Count - 1)
                cata.MyList2.Cons arg0_0 arg1_0 |> myList2Stack.Add
--- a/ConsumePlugin/MockExample.fs
+++ b/ConsumePlugin/MockExample.fs
@@ -48,3 +48,10 @@ type TypeWithInterface =
    inherit IDisposable
    abstract Mem1 : string option -> string[] Async
    abstract Mem2 : unit -> string[] Async
+
+[<GenerateMock>]
+type TypeWithProperties =
+    inherit IDisposable
+    abstract Mem1 : string option -> string[] Async
+    abstract Prop1 : int
+    abstract Prop2 : unit Async
--- a/ConsumePlugin/MockExampleNoAttributes.fs
+++ b/ConsumePlugin/MockExampleNoAttributes.fs
@@ -0,0 +1,41 @@
+namespace SomeNamespace
+
+open System
+
+type IPublicTypeNoAttr =
+    abstract Mem1 : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+type IPublicTypeInternalFalseNoAttr =
+    abstract Mem1 : string * int -> string list
+    abstract Mem2 : string -> int
+    abstract Mem3 : x : int * ?ct : System.Threading.CancellationToken -> string
+
+type internal InternalTypeNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type private PrivateTypeNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type private PrivateTypeInternalFalseNoAttr =
+    abstract Mem1 : string * int -> unit
+    abstract Mem2 : string -> int
+
+type VeryPublicTypeNoAttr<'a, 'b> =
+    abstract Mem1 : 'a -> 'b
+
+type CurriedNoAttr<'a> =
+    abstract Mem1 : int -> 'a -> string
+    abstract Mem2 : int * string -> 'a -> string
+    abstract Mem3 : (int * string) -> 'a -> string
+    abstract Mem4 : (int * string) -> ('a * int) -> string
+    abstract Mem5 : x : int * string -> ('a * int) -> string
+    abstract Mem6 : int * string -> y : 'a * int -> string
+
+type TypeWithInterfaceNoAttr =
+    inherit IDisposable
+    abstract Mem1 : string option -> string[] Async
+    abstract Mem2 : unit -> string[] Async
--- a/ConsumePlugin/PureGymDto.fs
+++ b/ConsumePlugin/PureGymDto.fs
@@ -19,13 +19,16 @@ type GymAccessOptions =
        QrCodeAccess : bool
    }

+[<Measure>]
+type measure
+
 [<WoofWare.Myriad.Plugins.JsonParse>]
 type GymLocation =
    {
        [<JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)>]
        Longitude : float
        [<JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)>]
-        Latitude : float
+        Latitude : float<measure>
    }

 [<WoofWare.Myriad.Plugins.JsonParse>]
--- a/ConsumePlugin/RecordFile.fs
+++ b/ConsumePlugin/RecordFile.fs
@@ -1,9 +1,5 @@
 namespace ConsumePlugin

-type ParseState =
-    | AwaitingKey
-    | AwaitingValue of string
-
 /// My whatnot
 [<WoofWare.Myriad.Plugins.RemoveOptions>]
 type RecordType =
--- a/ConsumePlugin/RestApiExample.fs
+++ b/ConsumePlugin/RestApiExample.fs
@@ -17,6 +17,9 @@ type IPureGymApi =
    [<Get "v1/gyms/{gym_id}/attendance">]
    abstract GetGymAttendance : [<Path "gym_id">] gymId : int * ?ct : CancellationToken -> Task<GymAttendance>

+    [<Get "v1/gyms/{gym_id}/attendance">]
+    abstract GetGymAttendance' : [<Path("gym_id")>] gymId : int * ?ct : CancellationToken -> Task<GymAttendance>
+
    [<RestEase.GetAttribute "v1/member">]
    abstract GetMember : ?ct : CancellationToken -> Member Task

@@ -38,6 +41,10 @@ type IPureGymApi =
    abstract GetSessions :
        [<Query>] fromDate : DateOnly * [<Query>] toDate : DateOnly * ?ct : CancellationToken -> Task<Sessions>

+    [<Get "/v2/gymSessions/member?foo=1">]
+    abstract GetSessionsWithQuery :
+        [<Query>] fromDate : DateOnly * [<Query>] toDate : DateOnly * ?ct : CancellationToken -> Task<Sessions>
+
    // An example from RestEase's own docs
    [<Post "users/new">]
    abstract CreateUserString : [<Body>] user : string * ?ct : CancellationToken -> Task<string>
@@ -115,21 +122,62 @@ type internal IApiWithoutBaseAddress =
    [<Get "endpoint/{param}">]
    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>

-// TODO: implement BasePath support
-
 [<WoofWare.Myriad.Plugins.HttpClient>]
 [<BasePath "foo">]
 type IApiWithBasePath =
-    [<Get "endpoint/{param}">]
+    // Example where we use the bundled attributes rather than RestEase's
+    [<WoofWare.Myriad.Plugins.RestEase.Get "endpoint/{param}">]
    abstract GetPathParam : [<Path "param">] parameter : string * ?cancellationToken : CancellationToken -> Task<string>

 [<WoofWare.Myriad.Plugins.HttpClient>]
-[<BaseAddress "https://whatnot.com">]
+[<BaseAddress "https://whatnot.com/thing">]
 [<BasePath "foo">]
 type IApiWithBasePathAndAddress =
    [<Get "endpoint/{param}">]
    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>

+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BasePath "/foo">]
+type IApiWithAbsoluteBasePath =
+    // Example where we use the bundled attributes rather than RestEase's
+    [<WoofWare.Myriad.Plugins.RestEase.Get "endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?cancellationToken : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BaseAddress "https://whatnot.com/thing">]
+[<BasePath "/foo">]
+type IApiWithAbsoluteBasePathAndAddress =
+    [<Get "endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BasePath "foo">]
+type IApiWithBasePathAndAbsoluteEndpoint =
+    // Example where we use the bundled attributes rather than RestEase's
+    [<WoofWare.Myriad.Plugins.RestEase.Get "/endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?cancellationToken : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BaseAddress "https://whatnot.com/thing">]
+[<BasePath "foo">]
+type IApiWithBasePathAndAddressAndAbsoluteEndpoint =
+    [<Get "/endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BasePath "/foo">]
+type IApiWithAbsoluteBasePathAndAbsoluteEndpoint =
+    // Example where we use the bundled attributes rather than RestEase's
+    [<WoofWare.Myriad.Plugins.RestEase.Get "/endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?cancellationToken : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<BaseAddress "https://whatnot.com/thing">]
+[<BasePath "/foo">]
+type IApiWithAbsoluteBasePathAndAddressAndAbsoluteEndpoint =
+    [<Get "/endpoint/{param}">]
+    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>
+
 [<WoofWare.Myriad.Plugins.HttpClient>]
 [<Header("Header-Name", "Header-Value")>]
 type IApiWithHeaders =
@@ -140,4 +188,50 @@ type IApiWithHeaders =
    abstract SomeOtherHeader : int

    [<Get "endpoint/{param}">]
+    [<Header("Something-Else", "val")>]
    abstract GetPathParam : [<Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+[<WoofWare.Myriad.Plugins.RestEase.Header("Header-Name", "Header-Value")>]
+type IApiWithHeaders2 =
+    [<WoofWare.Myriad.Plugins.RestEase.Header "X-Foo">]
+    abstract SomeHeader : string
+
+    [<WoofWare.Myriad.Plugins.RestEase.Header "Authorization">]
+    abstract SomeOtherHeader : int
+
+    [<Get "endpoint/{param}">]
+    abstract GetPathParam :
+        [<WoofWare.Myriad.Plugins.RestEase.Path "param">] parameter : string * ?ct : CancellationToken -> Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+type IClientWithJsonBody =
+    // As a POST request of a JSON-serialised body, we automatically set Content-Type: application/json.
+    [<Post "endpoint/{param}">]
+    abstract GetPathParam :
+        [<RestEase.Path "param">] parameter : string *
+        [<WoofWare.Myriad.Plugins.RestEase.Body>] mem : PureGym.Member *
+        ?ct : CancellationToken ->
+            Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+type IClientWithJsonBodyOverridden =
+    // As a POST request of a JSON-serialised body, we *would* automatically set Content-Type: application/json,
+    // but this method has overridden it.
+    [<Post "endpoint/{param}">]
+    [<Header("Content-Type", "application/ecmascript")>]
+    abstract GetPathParam :
+        [<RestEase.Path "param">] parameter : string *
+        [<WoofWare.Myriad.Plugins.RestEase.Body>] mem : PureGym.Member *
+        ?ct : CancellationToken ->
+            Task<string>
+
+[<WoofWare.Myriad.Plugins.HttpClient>]
+type IClientWithStringBody =
+    // As a POST request of a bare string body, we don't override the Content-Type.
+    [<Post "endpoint/{param}">]
+    abstract GetPathParam :
+        [<RestEase.Path "param">] parameter : string *
+        [<WoofWare.Myriad.Plugins.RestEase.Body>] mem : string *
+        ?ct : CancellationToken ->
+            Task<string>
--- a/ConsumePlugin/SerializationAndDeserialization.fs
+++ b/ConsumePlugin/SerializationAndDeserialization.fs
@@ -16,6 +16,15 @@ type InnerTypeWithBoth =
        ConcreteDict : Dictionary<string, InnerTypeWithBoth>
    }

+[<WoofWare.Myriad.Plugins.JsonParse true>]
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+type SomeEnum =
+    | Blah = 1
+    | Thing = 0
+
+[<Measure>]
+type measure
+
 [<WoofWare.Myriad.Plugins.JsonParse true>]
 [<WoofWare.Myriad.Plugins.JsonSerialize true>]
 type JsonRecordTypeWithBoth =
@@ -25,5 +34,61 @@ type JsonRecordTypeWithBoth =
        C : int list
        D : InnerTypeWithBoth
        E : string array
-        F : int[]
+        Arr : int[]
+        Byte : byte<measure>
+        Sbyte : sbyte<measure>
+        I : int<measure>
+        I32 : int32<measure>
+        I64 : int64<measure>
+        U : uint<measure>
+        U32 : uint32<measure>
+        U64 : uint64<measure>
+        F : float<measure>
+        F32 : float32<measure>
+        Single : single<measure>
+        IntMeasureOption : int<measure> option
+        IntMeasureNullable : int<measure> Nullable
+        Enum : SomeEnum
+        Timestamp : DateTimeOffset
+        Unit : unit
+    }
+
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+type FirstDu =
+    | EmptyCase
+    | Case1 of data : string
+    | Case2 of record : JsonRecordTypeWithBoth * i : int
+
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+type HeaderAndValue =
+    {
+        Header : string
+        Value : string
+    }
+
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+type Foo =
+    {
+        Message : HeaderAndValue option
+    }
+
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+type CollectRemaining =
+    {
+        Message : HeaderAndValue option
+        [<JsonExtensionData>]
+        Rest : Dictionary<string, System.Text.Json.Nodes.JsonNode>
+    }
+
+[<WoofWare.Myriad.Plugins.JsonSerialize true>]
+[<WoofWare.Myriad.Plugins.JsonParse true>]
+type OuterCollectRemaining =
+    {
+        [<JsonExtensionData>]
+        Others : Dictionary<string, int>
+        Remaining : CollectRemaining
    }
--- a/ConsumePlugin/Vault.fs
+++ b/ConsumePlugin/Vault.fs
@@ -76,3 +76,33 @@ type IVaultClient =

    [<Get "v1/auth/jwt/login">]
    abstract GetJwt : role : string * jwt : string * ?ct : CancellationToken -> Task<JwtVaultResponse>
+
+[<WoofWare.Myriad.Plugins.HttpClient false>]
+type IVaultClientNonExtensionMethod =
+    [<Get "v1/{mountPoint}/{path}">]
+    abstract GetSecret :
+        jwt : JwtVaultResponse *
+        [<Path "path">] path : string *
+        [<Path "mountPoint">] mountPoint : string *
+        ?ct : CancellationToken ->
+            Task<JwtSecretResponse>
+
+    [<Get "v1/auth/jwt/login">]
+    abstract GetJwt : role : string * jwt : string * ?ct : CancellationToken -> Task<JwtVaultResponse>
+
+[<WoofWare.Myriad.Plugins.HttpClient(true)>]
+type IVaultClientExtensionMethod =
+    [<Get "v1/{mountPoint}/{path}">]
+    abstract GetSecret :
+        jwt : JwtVaultResponse *
+        [<Path "path">] path : string *
+        [<Path "mountPoint">] mountPoint : string *
+        ?ct : CancellationToken ->
+            Task<JwtSecretResponse>
+
+    [<Get "v1/auth/jwt/login">]
+    abstract GetJwt : role : string * jwt : string * ?ct : CancellationToken -> Task<JwtVaultResponse>
+
+[<RequireQualifiedAccess>]
+type VaultClientExtensionMethod =
+    static member thisClashes = 99
--- a/ConsumePlugin/swagger-gitea.json
+++ b/ConsumePlugin/swagger-gitea.json
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -10,19 +10,10 @@
    <WarnOn>FS3388,FS3559</WarnOn>
  </PropertyGroup>
  <ItemGroup>
-    <PackageReference Include="Nerdbank.GitVersioning" Version="3.6.133" PrivateAssets="all"/>
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All"/>
-    <SourceLinkGitHubHost Include="github.com" ContentUrl="https://raw.githubusercontent.com"/>
+    <PackageReference Include="Nerdbank.GitVersioning" Version="3.8.118" PrivateAssets="all" />
+    <SourceLinkGitHubHost Include="github.com" ContentUrl="https://raw.githubusercontent.com" />
  </ItemGroup>
-  <!--
-    SourceLink doesn't support F# deterministic builds out of the box,
-    so tell SourceLink that our source root is going to be remapped.
-  -->
-  <Target Name="MapSourceRoot" BeforeTargets="_GenerateSourceLinkFile" Condition="'$(SourceRootMappedPathsFeatureSupported)' != 'true'">
-    <ItemGroup>
-      <SourceRoot Update="@(SourceRoot)">
-        <MappedPath>Z:\CheckoutRoot\WoofWare.Myriad\</MappedPath>
-      </SourceRoot>
-    </ItemGroup>
-  </Target>
+  <PropertyGroup Condition="'$(GITHUB_ACTION)' != ''">
+    <ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+  </PropertyGroup>
 </Project>
--- a/README.md
+++ b/README.md
@@ -8,23 +8,22 @@

 Some helpers in [Myriad](https://github.com/MoiraeSoftware/myriad/) which might be useful.

-These are currently somewhat experimental, and I personally am their primary customer.
-The `RemoveOptions` generator in particular is extremely half-baked.
+Currently implemented:
+
+* `JsonParse` (to stamp out `jsonParse : JsonNode -> 'T` methods).
+* `JsonSerialize` (to stamp out `toJsonNode : 'T -> JsonNode` methods).
+* `HttpClient` (to stamp out a [RestEase](https://github.com/canton7/RestEase)-style HTTP client).
+* `GenerateMock` and `GenerateCapturingMock` (to stamp out a record type corresponding to an interface, like a compile-time [Foq](https://github.com/fsprojects/Foq)).
+* `ArgParser` (to stamp out a basic argument parser).
+* `SwaggerClient` (to stamp out an HTTP client for a Swagger API).
+* `CreateCatamorphism` (to stamp out a non-stack-overflowing [catamorphism](https://fsharpforfunandprofit.com/posts/recursive-types-and-folds/) for a discriminated union).
+* `RemoveOptions` (to strip `option` modifiers from a type) - this one is particularly half-baked!

 If you would like to ensure that your particular use-case remains unbroken, please do contribute tests to this repository.
 The `ConsumePlugin` assembly contains a number of invocations of these source generators,
 so you just need to add copies of your types to that assembly to ensure that I will at least notice if I break the build;
 and if you add tests to `WoofWare.Myriad.Plugins.Test` then I will also notice if I break the runtime semantics of the generated code.

-Currently implemented:
-
-* `JsonParse` (to stamp out `jsonParse : JsonNode -> 'T` methods);
-* `JsonSerialize` (to stamp out `toJsonNode : 'T -> JsonNode` methods);
-* `RemoveOptions` (to strip `option` modifiers from a type).
-* `HttpClient` (to stamp out a [RestEase](https://github.com/canton7/RestEase)-style HTTP client).
-* `GenerateMock` (to stamp out a record type corresponding to an interface).
-* `CreateCatamorphism` (to stamp out a non-stack-overflowing [catamorphism](https://fsharpforfunandprofit.com/posts/recursive-types-and-folds/) for a discriminated union).
-
 ## `JsonParse`

 Takes records like this:
@@ -137,12 +136,15 @@ module InnerTypeWithBoth =
                        ret.Add (key.ToString (), System.Text.Json.Nodes.JsonValue.Create<Uri> value)

                    ret
-                ) input.Map
+                ) input.ReadOnlyDict
            )

        node
 ```

+Also includes an *opinionated* serializer for discriminated unions.
+(Any such serializer must be opinionated, because JSON does not natively model DUs.)
+
 As in `JsonParse`, you can optionally supply the boolean `true` to the attribute,
 which will cause Myriad to stamp out an extension method rather than a module with the same name as the type.

@@ -150,6 +152,160 @@ The same limitations generally apply to `JsonSerialize` as do to `JsonParse`.

 For an example of using both `JsonParse` and `JsonSerialize` together with complex types, see [the type definitions](./ConsumePlugin/SerializationAndDeserialization.fs) and [tests](./WoofWare.Myriad.Plugins.Test/TestJsonSerialize/TestJsonSerde.fs).

+## `ArgParser`
+
+Takes a record like this:
+
+```fsharp
+type DryRunMode =
+    | [<ArgumentFlag true> Dry
+    | [<ArgumentFlag false> Wet
+
+[<ArgParser>]
+type Foo =
+    {
+        [<ArgumentHelpText "Enable the frobnicator">]
+        SomeFlag : bool
+        A : int option
+        [<ArgumentDefaultFunction>]
+        B : Choice<int, int>
+        [<ArgumentDefaultEnvironmentVariable "MY_ENV_VAR">]
+        BWithEnv : Choice<int, int>
+        [<ArgumentDefaultFunction>]
+        DryRun : DryRunMode
+        [<ArgumentLongForm "longer-form-replaces-c">]
+        C : float list
+        // optionally:
+        [<PositionalArgs>]
+        Rest : string list // or e.g. `int list` if you want them parsed into a type too
+    }
+    static member DefaultB () = 4
+    static member DefaultDryRun () = DryRunMode.Wet
+```
+
+and stamps out a basic `parse` method of this signature:
+
+```fsharp
+[<RequireQualifiedAccess>]
+module Foo =
+    // in case you want to test it
+    let parse' (getEnvVar : string -> string) (args : string list) : Foo = ...
+    // the one we expect you actually want to use
+    let parse (args : string list) : Foo = ...
+```
+
+Default arguments are handled as `Choice<'a, 'a>`:
+you get a `Choice1Of2` if the user provided the input, or a `Choice2Of2` if the parser filled in your specified default value.
+
+You can control `TimeSpan` and friends with the `[<InvariantCulture>]` and `[<ParseExact @"hh\:mm\:ss">]` attributes.
+
+You can generate extension methods for the type, instead of a module with the type's name, using `[<ArgParser (* isExtensionMethod = *) true>]`.
+
+If `--help` appears in a position where the parser is expecting a key (e.g. in the first position, or after a `--foo=bar`), the parser fails with help text.
+The parser also makes a limited effort to supply help text when encountering an invalid parse.
+
+### What's the point?
+
+I got fed up of waiting for us to find time to rewrite the in-house one at work.
+That one has a bunch of nice compositional properties, which my version lacks:
+I can basically only deal with primitive types, and e.g. you can't stack records and discriminated unions inside each other.
+
+But I *do* want an F#-native argument parser suitable for AOT-compilation.
+
+Why not [Argu](https://fsprojects.github.io/Argu/)?
+Answer: I got annoyed with having to construct my records by hand even after Argu returned and said the parsing was all "done".
+
+### Limitations
+
+This is very bare-bones, but do raise GitHub issues if you like (or if you find cases where the parser does the wrong thing).
+
+* Help is signalled by throwing an exception, so you'll get an unsightly stack trace and a nonzero exit code.
+* Help doesn't take into account any arguments the user has entered. Ideally you'd get contextual information like an identification of which args the user has supplied at the point where the parse failed or help was requested.
+* I don't handle very many types, and in particular a real arg parser would handle DUs and records with nesting.
+* I don't try very hard to find a valid parse. It may well be possible to find a case where I fail to parse despite there existing a valid parse.
+* There's no subcommand support (you'll have to do that yourself).
+
+It should work fine if you just want to compose a few primitive types, though.
+
+## `SwaggerClient`
+
+Takes a JSON-schema definition of a [Swagger API](https://swagger.io/), and stamps out a client like this:
+
+```fsharp
+/// A type which was defined in the Swagger spec
+[<JsonParse true ; JsonSerialize true>]
+type SwaggerType1 =
+    {
+        [<System.Text.Json.Serialization.JsonExtensionData>]
+        AdditionalProperties : System.Collections.Generic.Dictionary<string, System.Text.Json.Nodes.JsonNode>
+        Message : string
+    }
+
+/// Documentation from the Swagger spec
+[<HttpClient false ; RestEase.BasePath "/api/v1">]
+type IGitea =
+    /// Returns the Person actor for a user
+    [<RestEase.Get "/activitypub/user/{username}">]
+    abstract ActivitypubPerson :
+        [<RestEase.Path "username">] username : string * ?ct : System.Threading.CancellationToken ->
+            ActivityPub System.Threading.Tasks.Task
+```
+
+Notice that we automatically decorate the type with our `[<HttpClient>]` attribute, so if you choose to do so, you can chain another Myriad generated file off this one and you'll get a RestEase-style client stamped out.
+(See below, searching on the string `"Generated2SwaggerGitea.fs"`, for an example.)
+
+You don't need to `Content Include` or `EmbeddedResource Include` the JSON schema.
+`None Include` will do; we only need the source to be available at build time.
+
+You *do* need to include the following configuration:
+
+```xml
+<Compile Include="GeneratedClient.fs">
+  <!-- This bit is normal: -->
+  <MyriadFile>swagger.json</MyriadFile>
+  <!-- This bit is new and required! -->
+  <MyriadParams>
+    <ClassName>GiteaClient</ClassName>
+    <!-- Optionally: -->
+    <GenerateMock>true</GenerateMock>
+  </MyriadParams>
+</Compile>
+```
+
+The `<ClassName />` key tells us what to name the resulting interface (it gets an `I` prepended for you).
+You can optionally also set `<GenerateMockVisibility>v</GenerateMockVisibility>` to add the `[<GenerateMock>]` attribute to the type
+(where `v` should be `internal` or `public`, indicating "resulting mock type is internal" vs "is public"),
+so that the following manoeuvre will result in a generated mock:
+
+```xml
+<None Include="swagger-gitea.json" />
+<Compile Include="GeneratedSwaggerGitea.fs">
+  <MyriadFile>swagger-gitea.json</MyriadFile>
+  <MyriadParams>
+    <GenerateMockVisibility>public</GenerateMockVisibility>
+    <ClassName>Gitea</ClassName>
+  </MyriadParams>
+</Compile>
+<Compile Include="Generated2SwaggerGitea.fs">
+  <MyriadFile>GeneratedSwaggerGitea.fs</MyriadFile>
+</Compile>
+```
+
+(Note that you do have to create the `GeneratedSwaggerGitea.fs` file manually before code generation happens. Myriad will throw if that file isn't there, because `Generated2SwaggerGitea.fs` depends on it so Myriad wants to compute its hash. Just make an empty file.)
+
+### What's the point?
+
+[`SwaggerProvider`](https://github.com/fsprojects/SwaggerProvider) is *absolutely magical*, but it's kind of witchcraft.
+I fear no man, but that thing… it scares me.
+
+Also, builds using `SwaggerProvider` appear to be inherently nondeterministic, even if the data source doesn't change.
+
+## Limitations
+
+Swagger API specs appear to be pretty cowboy in the wild.
+I try to cope with invalid schemas I have seen, but I can't guarantee I do so correctly.
+Definitely do perform integration tests and let me know of weird specs you encounter, and bits of the (very extensive) Swagger spec I have omitted!
+
 ## `RemoveOptions`

 Takes a record like this:
@@ -284,9 +440,9 @@ There are also some design decisions:
  so arguments are forced to be tupled.
 * The `[<Optional>]` attribute is not supported and will probably not be supported, because I consider it to be cursed.

-## `GenerateMock`
+## `GenerateMock` and `GenerateCapturingMock`

-Takes a type like this:
+`GenerateMock` takes a type like this:

 ```fsharp
 [<GenerateMock>]
@@ -316,6 +472,59 @@ type internal PublicTypeMock =
        member this.Mem2 (arg0) = this.Mem2 (arg0)
 ```

+`GenerateCapturingMock` additionally captures the calls made to each function (except for `Dispose`).
+It takes a type like this:
+
+```fsharp
+[<GenerateCapturingMock>]
+type IPublicType =
+    abstract Mem1 : string * int -> thing : bool -> string list
+    abstract Mem2 : baz : string -> unit -> int
+```
+
+and stamps out types like this:
+
+```fsharp
+[<RequireQualifiedAccess>]
+module internal PublicTypeCalls =
+    type internal Mem1Call =
+        {
+            Arg0 : string * int
+            thing : bool
+        }
+
+    type internal Calls =
+        {
+            Mem1 : ResizeArray<Mem1Call>
+            Mem2 : ResizeArray<string>
+        }
+
+        static member Empty () = { Mem1 = ResizeArray () ; Mem2 = ResizeArray () }
+
+/// Mock record type for an interface
+type internal PublicTypeMock =
+    {
+        Mem1 : string * int -> bool -> string list
+        Mem2 : string -> int
+        Calls : PublicTypeCalls.Calls
+    }
+
+    static member Empty : PublicTypeMock =
+        {
+            Mem1 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Mem2 = (fun x -> raise (System.NotImplementedException "Unimplemented mock function"))
+            Calls = PublicTypeMockCalls.Calls.Empty ()
+        }
+
+    interface IPublicType with
+        member this.Mem1 (arg0, arg1) =
+            lock this.Calls.Mem1 (fun () -> this.Calls.Mem1.Add { Arg0 = arg0 ; thing = arg1 })
+            this.Mem1 (arg0, arg1)
+        member this.Mem2 (arg0) =
+            lock this.Calls.Mem2 (fun () -> this.Calls.Mem2.Add arg0)
+            this.Mem2 (arg0)
+```
+
 ### What's the point?

 Reflective mocking libraries like [Foq](https://github.com/fsprojects/Foq) in my experience are a rich source of flaky tests.
@@ -327,6 +536,36 @@ thereby allowing the programmer to use F#'s record-update syntax.

 * You may supply an `isInternal : bool` argument to the attribute. By default, we make the resulting record type at most internal (never public), since this is intended only to be used in tests; but you can instead make it public with `[<GenerateMock false>]`.

+### Gotchas (GenerateCapturingMock)
+
+We use the same name for the record field as the implementing interface member:
+
+```fsharp
+type FooMock =
+    {
+        Field : string -> unit
+    }
+    interface IFoo with
+        member _.Field x = ...
+```
+
+If you have an object of type `FooMock` in scope, you'll get the *record field*, not the *interface member*.
+You need to cast it to `IFoo` before using it (or pass it into a function which takes an `IFoo`):
+
+```fsharp
+let thing = FooMock.Empty () // of type FooMock
+thing.Field "hello" // the wrong one! bypasses the IFoo implementation which captures calls
+
+// correct:
+let thing' = FooMock.Empty ()
+let thing = thing' :> IFoo
+thing.Field "hello" // the right one: this call does get recorded in the mock, because this is the interface member
+
+// also correct, but beware because it leaves the chance of the above footgun lying around for later:
+let thing = FooMock.Empty () // of type FooMock
+doTheThing thing // where doTheThing : IFoo -> unit
+```
+
 ## `CreateCatamorphism`

 Takes a collection of mutually recursive discriminated unions:
@@ -413,13 +652,13 @@ For example, [PureGymDto.fs](./ConsumePlugin/PureGymDto.fs) is a real-world set
 * In your `.fsproj` file, define a helper variable so that subsequent steps don't all have to be kept in sync:
    ```xml
    <PropertyGroup>
-      <WoofWareMyriadPluginVersion>2.0.1</WoofWareMyriadPluginVersion>
+      <WoofWareMyriadPluginVersion>9.0.1</WoofWareMyriadPluginVersion>
    </PropertyGroup>
    ```
 * Take a reference on `WoofWare.Myriad.Plugins.Attributes` (which has no other dependencies), to obtain access to the attributes which the generator will recognise:
    ```xml
    <ItemGroup>
-        <PackageReference Include="WoofWare.Myriad.Plugins.Attributes" Version="2.0.2" />
+        <PackageReference Include="WoofWare.Myriad.Plugins.Attributes" Version="3.7.2" />
    </ItemGroup>
    ```
 * Take a reference (with private assets, to prevent these from propagating to your own assembly) on `WoofWare.Myriad.Plugins`, to obtain the plugins which Myriad will run, and on `Myriad.Sdk`, to obtain the Myriad binary itself:
@@ -448,6 +687,36 @@ For example, this specifies that Myriad is to use the contents of `Client.fs` to
 </ItemGroup>
 ```

+## Alternative use without the attributes
+
+You can avoid taking a reference on the `WoofWare.Myriad.Plugins.Attributes` assembly, instead putting all the configuration into the project file.
+This is implemented for everything except the SwaggerClientGenerator.
+
+```xml
+<Project>
+  <ItemGroup>
+    <Compile Include="Client.fs" />
+    <Compile Include="GeneratedClient.fs">
+        <MyriadFile>Client.fs</MyriadFile>
+        <MyriadParams>
+          <MyTypeName1>GenerateMock(false)!JsonParse</MyTypeName1>
+          <SomeOtherTypeName>GenerateMock</SomeOtherTypeName>
+        </MyriadParams>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="WoofWare.Myriad.Plugins" Version="$(WoofWareMyriadPluginVersion)" PrivateAssets="all" />
+    <PackageReference Include="Myriad.Sdk" Version="0.8.3" PrivateAssets="all" />
+  </ItemGroup>
+</Project>
+```
+
+That is, you specify a `!`-delimited list of the attributes you *would* apply to the type.
+Supply "arguments" to the attribute name in the project file as you would to the attribute itself.
+
+(Yes, this is indeed incredibly cumbersome, and you're not interested in the reasons it's all so mad!
+I'm hopefully going to get round to writing a more powerful source generation system which won't have these limitations.)
+
 ### Myriad Gotchas

 * MsBuild doesn't always realise that it needs to invoke Myriad during rebuild.
@@ -461,3 +730,7 @@ For example, this specifies that Myriad is to use the contents of `Client.fs` to
  You should probably add these files to your [fantomasignore](https://github.com/fsprojects/fantomas/blob/a999b77ca5a024fbc3409955faac797e29b39d27/docs/docs/end-users/IgnoreFiles.md)
  if you use Fantomas to format your repo;
  the alternative is to manually reformat every time Myriad changes the generated files.
+
+# Licence
+
+The code is MIT-licenced, except for the Swagger API examples in WoofWare.Myriad.Plugins.Test, which are [CC-BY 4.0](https://creativecommons.org/licenses/by/4.0/), copyright 2023 by the OpenAPI Initiative, and obtained from https://learn.openapis.org/examples/ with no changes made.
--- a/WoofWare.Myriad.Plugins.Attributes/ArgParserAttributes.fs
+++ b/WoofWare.Myriad.Plugins.Attributes/ArgParserAttributes.fs
@@ -0,0 +1,102 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+
+/// Attribute indicating a record type to which the "build arg parser" Myriad
+/// generator should apply during build.
+///
+/// If you supply isExtensionMethod = true, you will get extension methods.
+/// These can only be consumed from F#, but the benefit is that they don't use up the module name
+/// (since by default we create a module called "{TypeName}").
+type ArgParserAttribute (isExtensionMethod : bool) =
+    inherit Attribute ()
+
+    /// The default value of `isExtensionMethod`, the optional argument to the ArgParserAttribute constructor.
+    static member DefaultIsExtensionMethod = false
+
+    /// Shorthand for the "isExtensionMethod = false" constructor; see documentation there for details.
+    new () = ArgParserAttribute ArgParserAttribute.DefaultIsExtensionMethod
+
+/// Attribute indicating that this field shall accumulate all unmatched args,
+/// as well as any that appear after a bare `--`.
+///
+/// Set `includeFlagLike = true` to include args that begin `--` in the
+/// positional args.
+/// (By default, `includeFlagLike = false` and we throw when encountering
+/// an argument which looks like a flag but which we don't recognise.)
+/// We will still interpret `--help` as requesting help, unless it comes after
+/// a standalone `--` separator.
+///
+/// If the type of the PositionalArgs field is `Choice<'a, 'a>`, then we will
+/// tell you whether each arg came before or after a standalone `--` separator.
+/// For example, `MyApp foo bar -- baz` with PositionalArgs of `Choice<string, string>`
+/// would yield `Choice1Of2 foo, Choice1Of2 bar, Choice2Of2 baz`.
+type PositionalArgsAttribute (includeFlagLike : bool) =
+    inherit Attribute ()
+
+    /// The default value of `isExtensionMethod`, the optional argument to the ArgParserAttribute constructor.
+    static member DefaultIncludeFlagLike = false
+
+    /// Shorthand for the "includeFlagLike = false" constructor; see documentation there for details.
+    new () = PositionalArgsAttribute PositionalArgsAttribute.DefaultIncludeFlagLike
+
+/// Attribute indicating that this field shall have a default value derived
+/// from calling an appropriately named static method on the type.
+///
+/// This attribute can only be placed on fields of type `Choice<_, _>` where both type parameters
+/// are the same.
+/// After a successful parse, the value is Choice1Of2 if the user supplied an input,
+/// or Choice2Of2 if the input was obtained by calling the default function.
+///
+/// The static method we call for field `FieldName : 'a` is `DefaultFieldName : unit -> 'a`.
+type ArgumentDefaultFunctionAttribute () =
+    inherit Attribute ()
+
+/// Attribute indicating that this field shall have a default value derived
+/// from an environment variable (whose name you give in the attribute constructor).
+///
+/// This attribute can only be placed on fields of type `Choice<_, _>` where both type parameters
+/// are the same.
+/// After a successful parse, the value is Choice1Of2 if the user supplied an input,
+/// or Choice2Of2 if the input was obtained by pulling a value from `Environment.GetEnvironmentVariable`.
+type ArgumentDefaultEnvironmentVariableAttribute (envVar : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field shall have the given help text, when `--help` is invoked
+/// or when a parse error causes us to print help text.
+type ArgumentHelpTextAttribute (helpText : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field should be parsed with a ParseExact method on its type.
+/// For example, on a TimeSpan field, with [<ArgumentParseExact @"hh\:mm\:ss">], we will call
+/// `TimeSpan.ParseExact (s, @"hh\:mm\:ss", CultureInfo.CurrentCulture).
+type ParseExactAttribute (format : string) =
+    inherit Attribute ()
+
+/// Attribute indicating that this field should be parsed in the invariant culture, rather than the
+/// default current culture.
+/// For example, on a TimeSpan field, with [<InvariantCulture>] and [<ArgumentParseExact @"hh\:mm\:ss">], we will call
+/// `TimeSpan.ParseExact (s, @"hh\:mm\:ss", CultureInfo.InvariantCulture).
+type InvariantCultureAttribute () =
+    inherit Attribute ()
+
+/// Attribute placed on a field of a two-case no-data discriminated union, indicating that this is "basically a bool".
+/// For example: `type DryRun = | [<ArgumentFlag true>] Dry | [<ArgumentFlag false>] Wet`
+/// A record with `{ DryRun : DryRun }` will then be parsed like `{ DryRun : bool }` (so the user supplies `--dry-run`),
+/// but that you get this strongly-typed value directly in the code (so you `match args.DryRun with | DryRun.Dry ...`).
+///
+/// You must put this attribute on both cases of the discriminated union, with opposite values in each case.
+type ArgumentFlagAttribute (flagValue : bool) =
+    inherit Attribute ()
+
+/// Attribute placed on a field of a record to specify a different long form from the default. If you place this
+/// attribute, you won't get the default: ArgFoo would normally be expressed as `--arg-foo`, but if you instead
+/// say `[<ArgumentLongForm "thingy-blah">]` or `[<ArgumentLongForm "thingy">]`, you instead use `--thingy-blah`
+/// or `--thingy` respectively.
+///
+/// You can place this argument multiple times.
+///
+/// Omit the initial `--` that you expect the user to type.
+[<AttributeUsage(AttributeTargets.Field, AllowMultiple = true)>]
+type ArgumentLongForm (s : string) =
+    inherit Attribute ()
--- a/WoofWare.Myriad.Plugins.Attributes/Attributes.fs
+++ b/WoofWare.Myriad.Plugins.Attributes/Attributes.fs
@@ -14,6 +14,9 @@ type RemoveOptionsAttribute () =
 /// but where each method is represented as a record field, so you can use
 /// record update syntax to easily specify partially-implemented mock objects.
 /// You may optionally specify `isInternal = false` to get a mock with the public visibility modifier.
+///
+/// The default implementation of each field throws (except for default implementations of IDisposable, which are
+/// no-ops).
 type GenerateMockAttribute (isInternal : bool) =
    inherit Attribute ()
    /// The default value of `isInternal`, the optional argument to the GenerateMockAttribute constructor.
@@ -22,6 +25,26 @@ type GenerateMockAttribute (isInternal : bool) =
    /// Shorthand for the "isExtensionMethod = false" constructor; see documentation there for details.
    new () = GenerateMockAttribute GenerateMockAttribute.DefaultIsInternal

+/// Attribute indicating an interface type for which the "Generate Capturing Mock" Myriad
+/// generator should apply during build.
+/// This generator creates a record which implements the interface,
+/// but where each method is represented as a record field, so you can use
+/// record update syntax to easily specify partially-implemented mock objects.
+/// You may optionally specify `isInternal = false` to get a mock with the public visibility modifier.
+///
+/// The default implementation of each field throws.
+///
+/// The generated interface methods capture all calls made to them, before passing through to the relevant
+/// field of the mock record; the calls can be accessed later through the `Calls` field of the generated
+/// mock record.
+type GenerateCapturingMockAttribute (isInternal : bool) =
+    inherit Attribute ()
+    /// The default value of `isInternal`, the optional argument to the GenerateCapturingMockAttribute constructor.
+    static member DefaultIsInternal = true
+
+    /// Shorthand for the "isExtensionMethod = false" constructor; see documentation there for details.
+    new () = GenerateCapturingMockAttribute GenerateCapturingMockAttribute.DefaultIsInternal
+
 /// Attribute indicating a record type to which the "Add JSON serializer" Myriad
 /// generator should apply during build.
 /// The purpose of this generator is to create methods (possibly extension methods) of the form
@@ -60,8 +83,17 @@ type JsonParseAttribute (isExtensionMethod : bool) =
 /// generator should apply during build.
 /// This generator is intended to replicate much of the functionality of RestEase,
 /// i.e. to stamp out HTTP REST clients from interfaces defining the API.
-type HttpClientAttribute () =
+///
+/// If you supply isExtensionMethod = true, you will get extension methods.
+/// These can only be consumed from F#, but the benefit is that they don't use up the module name
+/// (since by default we create a module called "{TypeName}").
+type HttpClientAttribute (isExtensionMethod : bool) =
    inherit Attribute ()
+    /// The default value of `isExtensionMethod`, the optional argument to the HttpClientAttribute constructor.
+    static member DefaultIsExtensionMethod = false
+
+    /// Shorthand for the "isExtensionMethod = false" constructor; see documentation there for details.
+    new () = HttpClientAttribute HttpClientAttribute.DefaultIsExtensionMethod

 /// Attribute indicating a DU type to which the "create catamorphism" Myriad
 /// generator should apply during build.
--- a/WoofWare.Myriad.Plugins.Attributes/RestEase.fs
+++ b/WoofWare.Myriad.Plugins.Attributes/RestEase.fs
@@ -0,0 +1,84 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+
+/// Module containing duplicates of the supported RestEase attributes, in case you don't want
+/// to take a dependency on RestEase.
+[<RequireQualifiedAccess>]
+module RestEase =
+    /// Indicates that a method represents an HTTP Get query to the specified endpoint.
+    type GetAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Post query to the specified endpoint.
+    type PostAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Delete query to the specified endpoint.
+    type DeleteAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Head query to the specified endpoint.
+    type HeadAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Options query to the specified endpoint.
+    type OptionsAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Put query to the specified endpoint.
+    type PutAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Patch query to the specified endpoint.
+    type PatchAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that a method represents an HTTP Trace query to the specified endpoint.
+    type TraceAttribute (path : string) =
+        inherit Attribute ()
+
+    /// Indicates that this argument to a method is interpolated into the HTTP request at runtime
+    /// by setting a query parameter (with the given name) to the value of the annotated argument.
+    type QueryAttribute (paramName : string) =
+        inherit Attribute ()
+
+    /// Indicates that this interface represents a REST client which accesses an API whose paths are
+    /// all relative to the given address.
+    ///
+    /// We will essentially unconditionally append a slash to this for you, on the grounds that you probably don't
+    /// intend the base path *itself* to be an endpoint.
+    type BaseAddressAttribute (addr : string) =
+        inherit Attribute ()
+
+    /// Indicates that this interface member causes the interface to set a header with the given name,
+    /// whose value is obtained whenever required by a fresh call to the interface member.
+    type HeaderAttribute (header : string, value : string option) =
+        inherit Attribute ()
+        new (header : string) = HeaderAttribute (header, None)
+        new (header : string, value : string) = HeaderAttribute (header, Some value)
+
+    /// Indicates that this argument to a method is interpolated into the request path at runtime
+    /// by writing it into the templated string that specifies the HTTP query e.g. in the `[<Get "/foo/{template}">]`.
+    type PathAttribute (path : string option) =
+        inherit Attribute ()
+        new (path : string) = PathAttribute (Some path)
+        new () = PathAttribute None
+
+    /// Indicates that this argument to a method is passed to the remote API by being serialised into the request
+    /// body.
+    type BodyAttribute () =
+        inherit Attribute ()
+
+    /// This is interpolated into every URL, between the BaseAddress and the path specified by e.g. [<Get>].
+    /// Note that if the [<Get>]-specified path starts with a slash, the BasePath is ignored, because then [<Get>]
+    /// is considered to be relative to the URL root (i.e. the host part of the BaseAddress).
+    /// Similarly, if the [<BasePath>] starts with a slash, then any path component of the BaseAddress is ignored.
+    ///
+    /// We will essentially unconditionally append a slash to this for you, on the grounds that you probably don't
+    /// intend the base path *itself* to be an endpoint.
+    ///
+    /// Can contain {placeholders}; hopefully your methods define values for those placeholders with [<Path>]
+    /// attributes!
+    type BasePathAttribute (path : string) =
+        inherit Attribute ()
--- a/WoofWare.Myriad.Plugins.Attributes/SurfaceBaseline.txt
+++ b/WoofWare.Myriad.Plugins.Attributes/SurfaceBaseline.txt
@@ -1,12 +1,37 @@
+WoofWare.Myriad.Plugins.ArgParserAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgParserAttribute..ctor [constructor]: bool
+WoofWare.Myriad.Plugins.ArgParserAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.ArgParserAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
+WoofWare.Myriad.Plugins.ArgParserAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentDefaultEnvironmentVariableAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentDefaultFunctionAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.ArgumentFlagAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentFlagAttribute..ctor [constructor]: bool
+WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentHelpTextAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.ArgumentLongForm inherit System.Attribute
+WoofWare.Myriad.Plugins.ArgumentLongForm..ctor [constructor]: string
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.CreateCatamorphismAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.GenerateCapturingMockAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.GenerateCapturingMockAttribute..ctor [constructor]: bool
+WoofWare.Myriad.Plugins.GenerateCapturingMockAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.GenerateCapturingMockAttribute.DefaultIsInternal [static property]: [read-only] bool
+WoofWare.Myriad.Plugins.GenerateCapturingMockAttribute.get_DefaultIsInternal [static method]: unit -> bool
 WoofWare.Myriad.Plugins.GenerateMockAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.GenerateMockAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.GenerateMockAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.GenerateMockAttribute.DefaultIsInternal [static property]: [read-only] bool
 WoofWare.Myriad.Plugins.GenerateMockAttribute.get_DefaultIsInternal [static method]: unit -> bool
 WoofWare.Myriad.Plugins.HttpClientAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.HttpClientAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.HttpClientAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.HttpClientAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpClientAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.InvariantCultureAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.InvariantCultureAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonParseAttribute inherit System.Attribute
 WoofWare.Myriad.Plugins.JsonParseAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.JsonParseAttribute..ctor [constructor]: unit
@@ -17,5 +42,45 @@ WoofWare.Myriad.Plugins.JsonSerializeAttribute..ctor [constructor]: bool
 WoofWare.Myriad.Plugins.JsonSerializeAttribute..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonSerializeAttribute.DefaultIsExtensionMethod [static property]: [read-only] bool
 WoofWare.Myriad.Plugins.JsonSerializeAttribute.get_DefaultIsExtensionMethod [static method]: unit -> bool
+WoofWare.Myriad.Plugins.ParseExactAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.ParseExactAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.PositionalArgsAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.PositionalArgsAttribute..ctor [constructor]: bool
+WoofWare.Myriad.Plugins.PositionalArgsAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.PositionalArgsAttribute.DefaultIncludeFlagLike [static property]: [read-only] bool
+WoofWare.Myriad.Plugins.PositionalArgsAttribute.get_DefaultIncludeFlagLike [static method]: unit -> bool
 WoofWare.Myriad.Plugins.RemoveOptionsAttribute inherit System.Attribute
-WoofWare.Myriad.Plugins.RemoveOptionsAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RemoveOptionsAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RestEase inherit obj
+WoofWare.Myriad.Plugins.RestEase+BaseAddressAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+BaseAddressAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+BasePathAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+BasePathAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+BodyAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+BodyAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RestEase+DeleteAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+DeleteAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+GetAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+GetAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+HeadAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+HeadAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+HeaderAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+HeaderAttribute..ctor [constructor]: (string, string option)
+WoofWare.Myriad.Plugins.RestEase+HeaderAttribute..ctor [constructor]: (string, string)
+WoofWare.Myriad.Plugins.RestEase+HeaderAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+OptionsAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+OptionsAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+PatchAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+PatchAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+PathAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+PathAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+PathAttribute..ctor [constructor]: string option
+WoofWare.Myriad.Plugins.RestEase+PathAttribute..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RestEase+PostAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+PostAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+PutAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+PutAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+QueryAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+QueryAttribute..ctor [constructor]: string
+WoofWare.Myriad.Plugins.RestEase+TraceAttribute inherit System.Attribute
+WoofWare.Myriad.Plugins.RestEase+TraceAttribute..ctor [constructor]: string
--- a/WoofWare.Myriad.Plugins.Attributes/Test/TestSurface.fs
+++ b/WoofWare.Myriad.Plugins.Attributes/Test/TestSurface.fs
@@ -11,11 +11,9 @@ module TestSurface =
    [<Test>]
    let ``Ensure API surface has not been modified`` () = ApiSurface.assertIdentical assembly

-    (*
    [<Test>]
    let ``Check version against remote`` () =
        MonotonicVersion.validate assembly "WoofWare.Myriad.Plugins.Attributes"
-    *)

    [<Test ; Explicit>]
    let ``Update API surface`` () =
--- a/WoofWare.Myriad.Plugins.Attributes/Test/WoofWare.Myriad.Plugins.Attributes.Test.fsproj
+++ b/WoofWare.Myriad.Plugins.Attributes/Test/WoofWare.Myriad.Plugins.Attributes.Test.fsproj
@@ -1,10 +1,15 @@
 <Project Sdk="Microsoft.NET.Sdk">

    <PropertyGroup>
-        <TargetFramework>net8.0</TargetFramework>
+      <TargetFramework>net9.0</TargetFramework>

-        <IsPackable>false</IsPackable>
-        <IsTestProject>true</IsTestProject>
+      <IsPackable>false</IsPackable>
+      <IsTestProject>true</IsTestProject>
+      <!--
+        Known high severity vulnerability
+        I have not yet seen a single instance where I care about this warning
+      -->
+      <NoWarn>$(NoWarn),NU1903</NoWarn>
    </PropertyGroup>

    <ItemGroup>
@@ -12,10 +17,10 @@
    </ItemGroup>

    <ItemGroup>
-        <PackageReference Include="ApiSurface" Version="4.0.33" />
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0"/>
-        <PackageReference Include="NUnit" Version="4.1.0"/>
-        <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
+        <PackageReference Include="ApiSurface" Version="5.0.1" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1"/>
+        <PackageReference Include="NUnit" Version="4.3.2"/>
+        <PackageReference Include="NUnit3TestAdapter" Version="5.0.0"/>
    </ItemGroup>

    <ItemGroup>
--- a/WoofWare.Myriad.Plugins.Attributes/WoofWare.Myriad.Plugins.Attributes.fsproj
+++ b/WoofWare.Myriad.Plugins.Attributes/WoofWare.Myriad.Plugins.Attributes.fsproj
@@ -19,6 +19,8 @@

  <ItemGroup>
    <Compile Include="Attributes.fs"/>
+    <Compile Include="ArgParserAttributes.fs" />
+    <Compile Include="RestEase.fs" />
    <EmbeddedResource Include="version.json"/>
    <EmbeddedResource Include="SurfaceBaseline.txt"/>
    <None Include="..\README.md">
--- a/WoofWare.Myriad.Plugins.Attributes/version.json
+++ b/WoofWare.Myriad.Plugins.Attributes/version.json
@@ -1,7 +1,15 @@
 {
-  "version": "2.2",
+  "version": "3.7",
  "publicReleaseRefSpec": [
    "^refs/heads/main$"
  ],
-  "pathFilters": null
-}
+  "pathFilters": [
+    ":/README.md",
+    ":/LICENSE",
+    ":/WoofWare.Myriad.Plugins/logo.png",
+    ":/Directory.Build.props",
+    ":/global.json",
+    "./",
+    ":^Test"
+  ]
+}
--- a/WoofWare.Myriad.Plugins.Test/Assembly.fs
+++ b/WoofWare.Myriad.Plugins.Test/Assembly.fs
@@ -0,0 +1,22 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open System.IO
+open System.Reflection
+
+[<RequireQualifiedAccess>]
+module Assembly =
+
+    let getEmbeddedResource (assembly : Assembly) (name : string) : string =
+        let names = assembly.GetManifestResourceNames ()
+
+        let names =
+            names |> Seq.filter (fun s -> s.EndsWith (name, StringComparison.Ordinal))
+
+        use s =
+            names
+            |> Seq.exactlyOne
+            |> assembly.GetManifestResourceStream
+            |> fun s -> new StreamReader (s)
+
+        s.ReadToEnd ()
--- a/WoofWare.Myriad.Plugins.Test/PureGymDtos.fs
+++ b/WoofWare.Myriad.Plugins.Test/PureGymDtos.fs
@@ -58,7 +58,7 @@ module PureGymDtos =
        [
            """{"latitude": 1.0, "longitude": 3.0}""",
            {
-                GymLocation.Latitude = 1.0
+                GymLocation.Latitude = 1.0<measure>
                Longitude = 3.0
            }
        ]
@@ -96,7 +96,7 @@ module PureGymDtos =
                Location =
                    {
                        Longitude = -0.110252
-                        Latitude = 51.480401
+                        Latitude = 51.480401<measure>
                    }
                TimeZone = "Europe/London"
                ReopenDate = "2021-04-12T00:00:00+01 Europe/London"
--- a/WoofWare.Myriad.Plugins.Test/TestArgParser/TestArgParser.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestArgParser/TestArgParser.fs
@@ -0,0 +1,706 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open System.Threading
+open NUnit.Framework
+open FsUnitTyped
+open ConsumePlugin
+open FsCheck
+
+[<TestFixture>]
+module TestArgParser =
+
+    [<TestCase true>]
+    [<TestCase false>]
+    let ``Positionals get parsed: they don't have to be strings`` (sep : bool) =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let property
+            (fooSep : bool)
+            (barSep : bool)
+            (bazSep : bool)
+            (pos0 : int list)
+            (pos1 : int list)
+            (pos2 : int list)
+            (pos3 : int list)
+            (pos4 : int list)
+            =
+            let args =
+                [
+                    yield! pos0 |> List.map string<int>
+                    if fooSep then
+                        yield "--foo=3"
+                    else
+                        yield "--foo"
+                        yield "3"
+                    yield! pos1 |> List.map string<int>
+                    if barSep then
+                        yield "--bar=4"
+                    else
+                        yield "--bar"
+                        yield "4"
+                    yield! pos2 |> List.map string<int>
+                    if bazSep then
+                        yield "--baz=true"
+                    else
+                        yield "--baz"
+                        yield "true"
+                    yield! pos3 |> List.map string<int>
+                    if sep then
+                        yield "--"
+                    yield! pos4 |> List.map string<int>
+                ]
+
+            BasicWithIntPositionals.parse' getEnvVar args
+            |> shouldEqual
+                {
+                    Foo = 3
+                    Bar = "4"
+                    Baz = true
+                    Rest = pos0 @ pos1 @ pos2 @ pos3 @ pos4
+                }
+
+        Check.QuickThrowOnFailure property
+
+    [<Test>]
+    let ``Arg-like thing appearing before double dash`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            None
+
+        let args = [ "--foo=3" ; "--non-existent" ; "--bar=4" ; "--baz=true" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        envCalls.Value |> shouldEqual 0
+
+        exc.Message
+        |> shouldEqual
+            """Unable to process supplied arg --non-existent. Help text follows.
+--foo  int32 : This is a foo!
+--bar  string
+--baz  bool
+--rest  string (positional args) (can be repeated) : Here's where the rest of the args go"""
+
+    [<Test>]
+    let ``Can supply positional args with key`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            None
+
+        let property (args : (int * bool) list) (afterDoubleDash : int list option) =
+            let flatArgs =
+                args
+                |> List.collect (fun (value, sep) ->
+                    if sep then
+                        [ $"--rest=%i{value}" ]
+                    else
+                        [ "--rest" ; string<int> value ]
+                )
+                |> fun l -> l @ [ "--foo=3" ; "--bar=4" ; "--baz=true" ]
+
+            let flatArgs, expected =
+                match afterDoubleDash with
+                | None -> flatArgs, List.map fst args
+                | Some rest -> flatArgs @ [ "--" ] @ (List.map string<int> rest), List.map fst args @ rest
+
+            BasicWithIntPositionals.parse' getEnvVar flatArgs
+            |> shouldEqual
+                {
+                    Foo = 3
+                    Bar = "4"
+                    Baz = true
+                    Rest = expected
+                }
+
+        Check.QuickThrowOnFailure property
+        envCalls.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Consume multiple occurrences of required arg`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            None
+
+        let args = [ "--foo=3" ; "--rest" ; "7" ; "--bar=4" ; "--baz=true" ; "--rest=8" ]
+
+        let result = BasicNoPositionals.parse' getEnvVar args
+
+        envCalls.Value |> shouldEqual 0
+
+        result
+        |> shouldEqual
+            {
+                Foo = 3
+                Bar = "4"
+                Baz = true
+                Rest = [ 7 ; 8 ]
+            }
+
+    [<Test>]
+    let ``Gracefully handle invalid multiple occurrences of required arg`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            None
+
+        let args = [ "--foo=3" ; "--foo" ; "9" ; "--bar=4" ; "--baz=true" ; "--baz=false" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        envCalls.Value |> shouldEqual 0
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Argument '--foo' was supplied multiple times: 3 and 9
+Argument '--baz' was supplied multiple times: True and false"""
+
+    [<Test>]
+    let ``Args appearing after double dash are positional`` () =
+        let envCalls = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envCalls |> ignore<int>
+            None
+
+        let args = [ "--" ; "--foo=3" ; "--bar=4" ; "--baz=true" ]
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar args |> ignore<Basic>)
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Required argument '--foo' received no value
+Required argument '--bar' received no value
+Required argument '--baz' received no value"""
+
+        envCalls.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Help text`` () =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            Some "hi!"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> Basic.parse' getEnvVar [ "--help" ] |> ignore<Basic>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--foo  int32 : This is a foo!
+--bar  string
+--baz  bool
+--rest  string (positional args) (can be repeated) : Here's where the rest of the args go"""
+
+    [<Test>]
+    let ``Help text, with default values`` () =
+        let envVars = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment envVars |> ignore<int>
+            None
+
+        let exc =
+            Assert.Throws<exn> (fun () -> LoadsOfTypes.parse' getEnvVar [ "--help" ] |> ignore<LoadsOfTypes>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--foo  int32
+--bar  string
+--baz  bool
+--some-file  FileInfo
+--some-directory  DirectoryInfo
+--some-list  DirectoryInfo (can be repeated)
+--optional-thing-with-no-default  int32 (optional)
+--optional-thing  bool (default value: True)
+--another-optional-thing  int32 (default value: 3)
+--yet-another-optional-thing  string (default value populated from env var CONSUMEPLUGIN_THINGS)
+--positionals  int32 (positional args) (can be repeated)"""
+
+        envVars.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Default values`` () =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            Some "hi!"
+
+        let args =
+            [
+                "--foo"
+                "3"
+                "--bar=some string"
+                "--baz"
+                "--some-file=/path/to/file"
+                "--some-directory"
+                "/a/dir"
+                "--another-optional-thing"
+                "3000"
+            ]
+
+        let result = LoadsOfTypes.parse' getEnvVar args
+
+        result.OptionalThing |> shouldEqual (Choice2Of2 true)
+        result.OptionalThingWithNoDefault |> shouldEqual None
+        result.AnotherOptionalThing |> shouldEqual (Choice1Of2 3000)
+        result.YetAnotherOptionalThing |> shouldEqual (Choice2Of2 "hi!")
+
+    [<Test>]
+    let ``ParseExact and help`` () =
+        let count = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment count |> ignore<int>
+            None
+
+        let exc =
+            Assert.Throws<exn> (fun () -> DatesAndTimes.parse' getEnvVar [ "--help" ] |> ignore<DatesAndTimes>)
+
+        exc.Message
+        |> shouldEqual
+            @"Help text requested.
+--plain  TimeSpan
+--invariant  TimeSpan
+--exact  TimeSpan : An exact time please [Parse format (.NET): hh\:mm\:ss]
+--invariant-exact  TimeSpan : [Parse format (.NET): hh\:mm\:ss]"
+
+        count.Value |> shouldEqual 0
+
+    [<Test>]
+    let rec ``TimeSpans and their attributes`` () =
+        let count = ref 0
+
+        let getEnvVar (_ : string) =
+            Interlocked.Increment count |> ignore<int>
+            None
+
+        let parsed =
+            DatesAndTimes.parse'
+                getEnvVar
+                [
+                    "--exact=11:34:00"
+                    "--plain=1"
+                    "--invariant=23:59"
+                    "--invariant-exact=23:59:00"
+                ]
+
+        parsed.Plain |> shouldEqual (TimeSpan (1, 0, 0, 0))
+        parsed.Invariant |> shouldEqual (TimeSpan (23, 59, 00))
+        parsed.Exact |> shouldEqual (TimeSpan (11, 34, 00))
+        parsed.InvariantExact |> shouldEqual (TimeSpan (23, 59, 00))
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                DatesAndTimes.parse'
+                    getEnvVar
+                    [
+                        "--exact=11:34:00"
+                        "--plain=1"
+                        "--invariant=23:59"
+                        "--invariant-exact=23:59"
+                    ]
+                |> ignore<DatesAndTimes>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Input string was not in a correct format. (at arg --invariant-exact=23:59)
+Required argument '--invariant-exact' received no value"""
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                DatesAndTimes.parse'
+                    getEnvVar
+                    [
+                        "--exact=11:34"
+                        "--plain=1"
+                        "--invariant=23:59"
+                        "--invariant-exact=23:59:00"
+                    ]
+                |> ignore<DatesAndTimes>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Errors during parse!
+Input string was not in a correct format. (at arg --exact=11:34)
+Required argument '--exact' received no value"""
+
+        count.Value |> shouldEqual 0
+
+    [<Test>]
+    let ``Can consume stacked record without positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecord.parse' getEnvVar [ "--and-another=true" ; "--thing1=9" ; "--thing2=a thing!" ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "a thing!"
+                    }
+                AndAnother = true
+            }
+
+    [<Test>]
+    let ``Can consume stacked record, child has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordChildPos.parse'
+                getEnvVar
+                [
+                    "--and-another=true"
+                    "--thing1=9"
+                    "--thing2=https://example.com"
+                    "--thing2=http://example.com"
+                ]
+
+        parsed.AndAnother |> shouldEqual true
+        parsed.Child.Thing1 |> shouldEqual 9
+
+        parsed.Child.Thing2
+        |> List.map (fun (x : Uri) -> x.ToString ())
+        |> shouldEqual [ "https://example.com/" ; "http://example.com/" ]
+
+    [<Test>]
+    let ``Can consume stacked record, child has no positionals, parent has positionals`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let parsed =
+            ParentRecordSelfPos.parse'
+                getEnvVar
+                [
+                    "--and-another=true"
+                    "--and-another=false"
+                    "--and-another=true"
+                    "--thing1=9"
+                    "--thing2=some"
+                ]
+
+        parsed
+        |> shouldEqual
+            {
+                Child =
+                    {
+                        Thing1 = 9
+                        Thing2 = "some"
+                    }
+                AndAnother = [ true ; false ; true ]
+            }
+
+    [<Test>]
+    let ``Help text for stacked records`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ParentRecordSelfPos.parse' getEnvVar [ "--help" ] |> ignore<ParentRecordSelfPos>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--thing1  int32
+--thing2  string
+--and-another  bool (positional args) (can be repeated)"""
+
+    [<Test>]
+    let ``Positionals are tagged with Choice`` () =
+        let getEnvVar (_ : string) = failwith "should not call"
+
+        ChoicePositionals.parse' getEnvVar [ "a" ; "b" ; "--" ; "--c" ; "--help" ]
+        |> shouldEqual
+            {
+                Args = [ Choice1Of2 "a" ; Choice1Of2 "b" ; Choice2Of2 "--c" ; Choice2Of2 "--help" ]
+            }
+
+    let boolCases =
+        [
+            "1", true
+            "0", false
+            "true", true
+            "false", false
+            "TRUE", true
+            "FALSE", false
+        ]
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof (boolCases))>]
+    let ``Bool env vars can be populated`` (envValue : string, boolValue : bool) =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            Some envValue
+
+        ContainsBoolEnvVar.parse' getEnvVar []
+        |> shouldEqual
+            {
+                BoolVar = Choice2Of2 boolValue
+            }
+
+    [<Test>]
+    let ``Bools can be treated with arity 0`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsBoolEnvVar.parse' getEnvVar [ "--bool-var" ]
+        |> shouldEqual
+            {
+                BoolVar = Choice1Of2 true
+            }
+
+    [<TestCaseSource(nameof boolCases)>]
+    let ``Flag DUs can be parsed from env var`` (envValue : string, boolValue : bool) =
+        let getEnvVar (s : string) =
+            s |> shouldEqual "CONSUMEPLUGIN_THINGS"
+            Some envValue
+
+        let boolValue = if boolValue then DryRunMode.Dry else DryRunMode.Wet
+
+        ContainsFlagEnvVar.parse' getEnvVar []
+        |> shouldEqual
+            {
+                DryRun = Choice2Of2 boolValue
+            }
+
+    let dryRunData =
+        [
+            [ "--dry-run" ], DryRunMode.Dry
+            [ "--dry-run" ; "true" ], DryRunMode.Dry
+            [ "--dry-run=true" ], DryRunMode.Dry
+            [ "--dry-run" ; "True" ], DryRunMode.Dry
+            [ "--dry-run=True" ], DryRunMode.Dry
+            [ "--dry-run" ; "false" ], DryRunMode.Wet
+            [ "--dry-run=false" ], DryRunMode.Wet
+            [ "--dry-run" ; "False" ], DryRunMode.Wet
+            [ "--dry-run=False" ], DryRunMode.Wet
+        ]
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof dryRunData)>]
+    let ``Flag DUs can be parsed`` (args : string list, expected : DryRunMode) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagEnvVar.parse' getEnvVar args
+        |> shouldEqual
+            {
+                DryRun = Choice1Of2 expected
+            }
+
+    [<TestCaseSource(nameof dryRunData)>]
+    let ``Flag DUs can be parsed, ArgumentDefaultFunction`` (args : string list, expected : DryRunMode) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagDefaultValue.parse' getEnvVar args
+        |> shouldEqual
+            {
+                DryRun = Choice1Of2 expected
+            }
+
+    [<Test>]
+    let ``Flag DUs can be given a default value`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ContainsFlagDefaultValue.parse' getEnvVar []
+        |> shouldEqual
+            {
+                DryRun = Choice2Of2 DryRunMode.Wet
+            }
+
+    [<Test>]
+    let ``Help text for flag DU`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ContainsFlagDefaultValue.parse' getEnvVar [ "--help" ]
+                |> ignore<ContainsFlagDefaultValue>
+            )
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--dry-run  bool (default value: false)"""
+
+    [<Test>]
+    let ``Help text for flag DU, non default`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> WithFlagDu.parse' getEnvVar [ "--help" ] |> ignore<WithFlagDu>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--dry-run  bool"""
+
+    let longFormCases =
+        let doTheThing =
+            [
+                [ "--do-something-else=foo" ]
+                [ "--anotherarg=foo" ]
+                [ "--do-something-else" ; "foo" ]
+                [ "--anotherarg" ; "foo" ]
+            ]
+
+        let someFlag =
+            [
+                [ "--turn-it-on" ], true
+                [ "--dont-turn-it-off" ], true
+                [ "--turn-it-on=true" ], true
+                [ "--dont-turn-it-off=true" ], true
+                [ "--turn-it-on=false" ], false
+                [ "--dont-turn-it-off=false" ], false
+                [ "--turn-it-on" ; "true" ], true
+                [ "--dont-turn-it-off" ; "true" ], true
+                [ "--turn-it-on" ; "false" ], false
+                [ "--dont-turn-it-off" ; "false" ], false
+            ]
+
+        List.allPairs doTheThing someFlag
+        |> List.map (fun (doTheThing, (someFlag, someFlagResult)) ->
+            let args = doTheThing @ someFlag
+
+            let expected =
+                {
+                    DoTheThing = "foo"
+                    SomeFlag = someFlagResult
+                }
+
+            args, expected
+        )
+        |> List.map TestCaseData
+
+    [<TestCaseSource(nameof longFormCases)>]
+    let ``Long-form args`` (args : string list, expected : ManyLongForms) =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        ManyLongForms.parse' getEnvVar args |> shouldEqual expected
+
+    [<Test>]
+    let ``Long-form args can't be referred to by their original name`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                ManyLongForms.parse' getEnvVar [ "--do-the-thing=foo" ] |> ignore<ManyLongForms>
+            )
+
+        exc.Message
+        |> shouldEqual """Unable to process argument --do-the-thing=foo as key --do-the-thing and value foo"""
+
+    [<Test>]
+    let ``Long-form args help text`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () -> ManyLongForms.parse' getEnvVar [ "--help" ] |> ignore<ManyLongForms>)
+
+        exc.Message
+        |> shouldEqual
+            """Help text requested.
+--do-something-else / --anotherarg  string
+--turn-it-on / --dont-turn-it-off  bool"""
+
+    [<Test>]
+    let ``Can collect *all* non-help args into positional args with includeFlagLike`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        FlagsIntoPositionalArgs.parse' getEnvVar [ "--a" ; "foo" ; "--b=false" ; "--c" ; "hi" ; "--" ; "--help" ]
+        |> shouldEqual
+            {
+                A = "foo"
+                GrabEverything = [ "--b=false" ; "--c" ; "hi" ; "--help" ]
+            }
+
+        // Users might consider this eccentric!
+        // But we're only a simple arg parser; we don't look around to see whether this is "almost"
+        // a valid parse.
+        FlagsIntoPositionalArgs.parse' getEnvVar [ "--a" ; "--b=false" ; "--c" ; "hi" ; "--" ; "--help" ]
+        |> shouldEqual
+            {
+                A = "--b=false"
+                GrabEverything = [ "--c" ; "hi" ; "--help" ]
+            }
+
+    [<Test>]
+    let ``Can collect non-help args into positional args with Choice`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        FlagsIntoPositionalArgsChoice.parse' getEnvVar [ "--a" ; "foo" ; "--b=false" ; "--c" ; "hi" ; "--" ; "--help" ]
+        |> shouldEqual
+            {
+                A = "foo"
+                GrabEverything =
+                    [
+                        Choice1Of2 "--b=false"
+                        Choice1Of2 "--c"
+                        Choice1Of2 "hi"
+                        Choice2Of2 "--help"
+                    ]
+            }
+
+    [<Test>]
+    let ``Can collect non-help args into positional args, and we parse on the way`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        FlagsIntoPositionalArgsInt.parse' getEnvVar [ "3" ; "--a" ; "foo" ; "5" ; "--" ; "98" ]
+        |> shouldEqual
+            {
+                A = "foo"
+                GrabEverything = [ 3 ; 5 ; 98 ]
+            }
+
+    [<Test>]
+    let ``Can collect non-help args into positional args with Choice, and we parse on the way`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        FlagsIntoPositionalArgsIntChoice.parse' getEnvVar [ "3" ; "--a" ; "foo" ; "5" ; "--" ; "98" ]
+        |> shouldEqual
+            {
+                A = "foo"
+                GrabEverything = [ Choice1Of2 3 ; Choice1Of2 5 ; Choice2Of2 98 ]
+            }
+
+    [<Test>]
+    let ``Can refuse to collect non-help args with PositionalArgs false`` () =
+        let getEnvVar (_ : string) = failwith "do not call"
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                FlagsIntoPositionalArgs'.parse'
+                    getEnvVar
+                    [ "--a" ; "foo" ; "--b=false" ; "--c" ; "hi" ; "--" ; "--help" ]
+                |> ignore<FlagsIntoPositionalArgs'>
+            )
+
+        exc.Message
+        |> shouldEqual """Unable to process argument --b=false as key --b and value false"""
+
+        let exc =
+            Assert.Throws<exn> (fun () ->
+                FlagsIntoPositionalArgs'.parse' getEnvVar [ "--a" ; "--b=false" ; "--c=hi" ; "--" ; "--help" ]
+                |> ignore<FlagsIntoPositionalArgs'>
+            )
+
+        // Again perhaps eccentric!
+        // Again, we don't try to detect that the user has missed out the desired argument to `--a`.
+        exc.Message
+        |> shouldEqual """Unable to process argument --c=hi as key --c and value hi"""
--- a/WoofWare.Myriad.Plugins.Test/TestCapturingMockGenerator/TestCapturingMockGenerator.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestCapturingMockGenerator/TestCapturingMockGenerator.fs
@@ -0,0 +1,72 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open SomeNamespace.CapturingMock
+open NUnit.Framework
+open FsUnitTyped
+
+[<TestFixture>]
+module TestCapturingMockGenerator =
+
+    [<Test>]
+    let ``Example of use: IPublicType`` () =
+        let mock : IPublicType =
+            { PublicTypeMock.Empty () with
+                Mem1 = fun (s, count) -> List.replicate count s
+            }
+            :> _
+
+        let _ =
+            Assert.Throws<NotImplementedException> (fun () -> mock.Mem2 "hi" |> ignore<int>)
+
+        mock.Mem1 ("hi", 3) |> shouldEqual [ "hi" ; "hi" ; "hi" ]
+
+    [<Test>]
+    let ``Example of use: curried args`` () =
+        let mock : Curried<_> =
+            { CurriedMock.Empty () with
+                Mem1 = fun i c -> Array.replicate i c |> String
+                Mem2 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+                Mem3 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+            }
+            :> _
+
+        mock.Mem1 3 'a' |> shouldEqual "aaa"
+        mock.Mem2 (3, "hi") 'a' |> shouldEqual "hiahiahi"
+        mock.Mem3 (3, "hi") 'a' |> shouldEqual "hiahiahi"
+
+    [<Test>]
+    let ``Example of use: properties`` () =
+        let mock : TypeWithProperties =
+            { TypeWithPropertiesMock.Empty () with
+                Mem1 = fun i -> async { return Option.toArray i }
+                Prop1 = fun () -> 44
+            }
+            :> _
+
+        mock.Mem1 (Some "hi") |> Async.RunSynchronously |> shouldEqual [| "hi" |]
+
+        mock.Prop1 |> shouldEqual 44
+
+    [<Test>]
+    let ``Example of curried use`` () =
+        let mock' =
+            { CurriedMock<string>.Empty () with
+                Mem1 =
+                    fun x y ->
+                        x |> shouldEqual 3
+                        y |> shouldEqual "hello"
+                        "it's me"
+            }
+
+        let mock = mock' :> Curried<_>
+
+        mock.Mem1 3 "hello" |> shouldEqual "it's me"
+
+        lock mock'.Calls.Mem1 (fun () -> Seq.toList mock'.Calls.Mem1)
+        |> List.exactlyOne
+        |> shouldEqual
+            {
+                bar = 3
+                Arg1 = "hello"
+            }
--- a/WoofWare.Myriad.Plugins.Test/TestCapturingMockGenerator/TestCapturingMockGeneratorNoAttr.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestCapturingMockGenerator/TestCapturingMockGeneratorNoAttr.fs
@@ -0,0 +1,36 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open SomeNamespace.CapturingMock
+open NUnit.Framework
+open FsUnitTyped
+
+[<TestFixture>]
+module TestCapturingMockGeneratorNoAttr =
+
+    [<Test>]
+    let ``Example of use: IPublicType`` () =
+        let mock : IPublicTypeNoAttr =
+            { PublicTypeNoAttrMock.Empty () with
+                Mem1 = fun (s, count) -> List.replicate count s
+            }
+            :> _
+
+        let _ =
+            Assert.Throws<NotImplementedException> (fun () -> mock.Mem2 "hi" |> ignore<int>)
+
+        mock.Mem1 ("hi", 3) |> shouldEqual [ "hi" ; "hi" ; "hi" ]
+
+    [<Test>]
+    let ``Example of use: curried args`` () =
+        let mock : CurriedNoAttr<_> =
+            { CurriedNoAttrMock.Empty () with
+                Mem1 = fun i c -> Array.replicate i c |> String
+                Mem2 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+                Mem3 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+            }
+            :> _
+
+        mock.Mem1 3 'a' |> shouldEqual "aaa"
+        mock.Mem2 (3, "hi") 'a' |> shouldEqual "hiahiahi"
+        mock.Mem3 (3, "hi") 'a' |> shouldEqual "hiahiahi"
--- a/WoofWare.Myriad.Plugins.Test/TestCataGenerator/TestGift.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestCataGenerator/TestGift.fs
@@ -43,7 +43,7 @@ module TestGift =
                    member _.WithACard g message =
                        $"%s{g} with a card saying '%s{message}'"

-                    member _.Wrapped g paper = $"%s{g} wrapped in %A{paper} paper"
+                    member _.Wrapped g paper = $"%s{g} wrapped in %O{paper} paper"
                }
        }

--- a/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestBasePath.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestBasePath.fs
@@ -9,18 +9,18 @@ open FsUnitTyped

 [<TestFixture>]
 module TestBasePath =
+    let replyWithUrl (message : HttpRequestMessage) : HttpResponseMessage Async =
+        async {
+            message.Method |> shouldEqual HttpMethod.Get
+            let content = new StringContent (message.RequestUri.ToString ())
+            let resp = new HttpResponseMessage (HttpStatusCode.OK)
+            resp.Content <- content
+            return resp
+        }
+
    [<Test>]
    let ``Base address is respected`` () =
-        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
-            async {
-                message.Method |> shouldEqual HttpMethod.Get
-                let content = new StringContent (message.RequestUri.ToString ())
-                let resp = new HttpResponseMessage (HttpStatusCode.OK)
-                resp.Content <- content
-                return resp
-            }
-
-        use client = HttpClientMock.makeNoUri proc
+        use client = HttpClientMock.makeNoUri replyWithUrl
        let api = PureGymApi.make client

        let observedUri = api.GetPathParam("param").Result
@@ -28,38 +28,28 @@ module TestBasePath =

    [<Test>]
    let ``Without a base address attr but with BaseAddress on client, request goes through`` () =
-        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
-            async {
-                message.Method |> shouldEqual HttpMethod.Get
-                let content = new StringContent (message.RequestUri.ToString ())
-                let resp = new HttpResponseMessage (HttpStatusCode.OK)
-                resp.Content <- content
-                return resp
-            }
-
-        use client = HttpClientMock.make (System.Uri "https://baseaddress.com") proc
+        use client = HttpClientMock.make (Uri "https://baseaddress.com") replyWithUrl
        let api = ApiWithoutBaseAddress.make client

        let observedUri = api.GetPathParam("param").Result
        observedUri |> shouldEqual "https://baseaddress.com/endpoint/param"

    [<Test>]
-    let ``Without a base address attr or BaseAddress on client, request throws`` () =
-        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
-            async {
-                message.Method |> shouldEqual HttpMethod.Get
-                let content = new StringContent (message.RequestUri.ToString ())
-                let resp = new HttpResponseMessage (HttpStatusCode.OK)
-                resp.Content <- content
-                return resp
-            }
+    let ``Base address on client takes precedence`` () =
+        use client = HttpClientMock.make (Uri "https://baseaddress.com") replyWithUrl
+        let api = PureGymApi.make client

-        use client = HttpClientMock.makeNoUri proc
+        let observedUri = api.GetPathParam("param").Result
+        observedUri |> shouldEqual "https://baseaddress.com/endpoint/param"
+
+    [<Test>]
+    let ``Without a base address attr or BaseAddress on client, request throws`` () =
+        use client = HttpClientMock.makeNoUri replyWithUrl
        let api = ApiWithoutBaseAddress.make client

        let observedExc =
            async {
-                let! result = api.GetPathParam ("param") |> Async.AwaitTask |> Async.Catch
+                let! result = api.GetPathParam "param" |> Async.AwaitTask |> Async.Catch

                match result with
                | Choice1Of2 _ -> return failwith "test failure"
@@ -78,3 +68,103 @@ module TestBasePath =
        observedExc.Message
        |> shouldEqual
            "No base address was supplied on the type, and no BaseAddress was on the HttpClient. (Parameter 'BaseAddress')"
+
+    [<Test>]
+    let ``Relative base path, no base address, relative attribute`` () : unit =
+        do
+            use client = HttpClientMock.makeNoUri replyWithUrl
+            let api = ApiWithBasePath.make client
+
+            let exc =
+                Assert.Throws<AggregateException> (fun () -> api.GetPathParam("hi").Result |> ignore<string>)
+
+            exc.InnerException.Message
+            |> shouldEqual
+                "No base address was supplied on the type, and no BaseAddress was on the HttpClient. (Parameter 'BaseAddress')"
+
+        use client = HttpClientMock.make (Uri "https://whatnot.com/thing/") replyWithUrl
+        let api = ApiWithBasePath.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/thing/foo/endpoint/hi"
+
+    [<Test>]
+    let ``Relative base path, base address, relative attribute`` () : unit =
+        use client = HttpClientMock.makeNoUri replyWithUrl
+        let api = ApiWithBasePathAndAddress.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/thing/foo/endpoint/hi"
+
+    [<Test>]
+    let ``Absolute base path, no base address, relative attribute`` () : unit =
+        do
+            use client = HttpClientMock.makeNoUri replyWithUrl
+            let api = ApiWithAbsoluteBasePath.make client
+
+            let exc =
+                Assert.Throws<AggregateException> (fun () -> api.GetPathParam("hi").Result |> ignore<string>)
+
+            exc.InnerException.Message
+            |> shouldEqual
+                "No base address was supplied on the type, and no BaseAddress was on the HttpClient. (Parameter 'BaseAddress')"
+
+        use client = HttpClientMock.make (Uri "https://whatnot.com/thing/") replyWithUrl
+        let api = ApiWithAbsoluteBasePath.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/foo/endpoint/hi"
+
+    [<Test>]
+    let ``Absolute base path, base address, relative attribute`` () : unit =
+        use client = HttpClientMock.makeNoUri replyWithUrl
+        let api = ApiWithAbsoluteBasePathAndAddress.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/foo/endpoint/hi"
+
+    [<Test>]
+    let ``Relative base path, no base address, absolute attribute`` () : unit =
+        do
+            use client = HttpClientMock.makeNoUri replyWithUrl
+            let api = ApiWithBasePathAndAbsoluteEndpoint.make client
+
+            let exc =
+                Assert.Throws<AggregateException> (fun () -> api.GetPathParam("hi").Result |> ignore<string>)
+
+            exc.InnerException.Message
+            |> shouldEqual
+                "No base address was supplied on the type, and no BaseAddress was on the HttpClient. (Parameter 'BaseAddress')"
+
+        use client = HttpClientMock.make (Uri "https://whatnot.com/thing/") replyWithUrl
+        let api = ApiWithBasePathAndAbsoluteEndpoint.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/endpoint/hi"
+
+    [<Test>]
+    let ``Relative base path, base address, absolute attribute`` () : unit =
+        use client = HttpClientMock.makeNoUri replyWithUrl
+        let api = ApiWithBasePathAndAddressAndAbsoluteEndpoint.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/endpoint/hi"
+
+    [<Test>]
+    let ``Absolute base path, no base address, absolute attribute`` () : unit =
+        do
+            use client = HttpClientMock.makeNoUri replyWithUrl
+            let api = ApiWithAbsoluteBasePathAndAbsoluteEndpoint.make client
+
+            let exc =
+                Assert.Throws<AggregateException> (fun () -> api.GetPathParam("hi").Result |> ignore<string>)
+
+            exc.InnerException.Message
+            |> shouldEqual
+                "No base address was supplied on the type, and no BaseAddress was on the HttpClient. (Parameter 'BaseAddress')"
+
+        use client = HttpClientMock.make (Uri "https://whatnot.com/thing/") replyWithUrl
+        let api = ApiWithAbsoluteBasePathAndAbsoluteEndpoint.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/endpoint/hi"
+
+    [<Test>]
+    let ``Absolute base path, base address, absolute attribute`` () : unit =
+        use client = HttpClientMock.makeNoUri replyWithUrl
+        let api = ApiWithAbsoluteBasePathAndAddressAndAbsoluteEndpoint.make client
+        let result = api.GetPathParam("hi").Result
+        result |> shouldEqual "https://whatnot.com/endpoint/hi"
--- a/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestPathParam.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestPathParam.fs
@@ -33,4 +33,4 @@ module TestPathParam =
        let api = PureGymApi.make client

        api.GetPathParam("hello/world?(hi)").Result
-        |> shouldEqual "hello%2fworld%3f(hi)"
+        |> shouldEqual "hello%2Fworld%3F%28hi%29"
--- a/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestPureGymRestApi.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestPureGymRestApi.fs
@@ -89,6 +89,7 @@ module TestPureGymRestApi =
        let api = PureGymApi.make client

        api.GetGymAttendance(requestedGym).Result |> shouldEqual expected
+        api.GetGymAttendance'(requestedGym).Result |> shouldEqual expected

    let memberCases =
        PureGymDtos.memberCases |> List.allPairs baseUris |> List.map TestCaseData
@@ -234,6 +235,33 @@ module TestPureGymRestApi =

        api.GetSessions(startDate, endDate).Result |> shouldEqual expected

+    [<TestCaseSource(nameof sessionsCases)>]
+    let ``Test GetSessionsWithQuery``
+        (baseUri : Uri, (startDate : DateOnly, (endDate : DateOnly, (json : string, expected : Sessions))))
+        =
+        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
+            async {
+                message.Method |> shouldEqual HttpMethod.Get
+
+                // This one is specified as being absolute, in its attribute on the IPureGymApi type
+                let expectedUri =
+                    let fromDate = dateOnlyToString startDate
+                    let toDate = dateOnlyToString endDate
+                    $"https://example.com/v2/gymSessions/member?foo=1&fromDate=%s{fromDate}&toDate=%s{toDate}"
+
+                message.RequestUri.ToString () |> shouldEqual expectedUri
+
+                let content = new StringContent (json)
+                let resp = new HttpResponseMessage (HttpStatusCode.OK)
+                resp.Content <- content
+                return resp
+            }
+
+        use client = HttpClientMock.make baseUri proc
+        let api = PureGymApi.make client
+
+        api.GetSessionsWithQuery(startDate, endDate).Result |> shouldEqual expected
+
    [<Test>]
    let ``URI example`` () =
        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
--- a/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestVariableHeader.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestVariableHeader.fs
@@ -3,10 +3,12 @@ namespace WoofWare.Myriad.Plugins.Test
 open System
 open System.Net
 open System.Net.Http
+open System.Text.Json.Nodes
 open System.Threading
 open NUnit.Framework
 open FsUnitTyped
 open PureGym
+open WoofWare.Expect

 [<TestFixture>]
 module TestVariableHeader =
@@ -50,9 +52,17 @@ module TestVariableHeader =
        someHeaderCount.Value |> shouldEqual 10
        someOtherHeaderCount.Value |> shouldEqual -100

-        api.GetPathParam("param").Result.Split "\n"
-        |> Array.sort
-        |> shouldEqual [| "Authorization: -99" ; "Header-Name: Header-Value" ; "X-Foo: 11" |]
+        expect {
+            snapshotJson
+                @"[
+  ""Authorization: -99"",
+  ""Header-Name: Header-Value"",
+  ""Something-Else: val"",
+  ""X-Foo: 11""
+]"
+
+            return api.GetPathParam("param").Result.Split "\n" |> Array.sort
+        }

        someHeaderCount.Value |> shouldEqual 11
        someOtherHeaderCount.Value |> shouldEqual -99
@@ -96,13 +106,156 @@ module TestVariableHeader =
        someHeaderCount.Value |> shouldEqual 10
        someOtherHeaderCount.Value |> shouldEqual -100

-        api.GetPathParam("param").Result.Split "\n"
-        |> Array.sort
-        |> shouldEqual [| "Authorization: -99" ; "Header-Name: Header-Value" ; "X-Foo: 11" |]
+        expect {
+            snapshotJson
+                @"[
+  ""Authorization: -99"",
+  ""Header-Name: Header-Value"",
+  ""Something-Else: val"",
+  ""X-Foo: 11""
+]"

-        api.GetPathParam("param").Result.Split "\n"
-        |> Array.sort
-        |> shouldEqual [| "Authorization: -98" ; "Header-Name: Header-Value" ; "X-Foo: 12" |]
+            return api.GetPathParam("param").Result.Split "\n" |> Array.sort
+        }
+
+        expect {
+            snapshotJson
+                @"[
+  ""Authorization: -98"",
+  ""Header-Name: Header-Value"",
+  ""Something-Else: val"",
+  ""X-Foo: 12""
+]"
+
+            return api.GetPathParam("param").Result.Split "\n" |> Array.sort
+        }

        someHeaderCount.Value |> shouldEqual 12
        someOtherHeaderCount.Value |> shouldEqual -98
+
+    let pureGymMember =
+        {
+            Id = 3
+            CompoundMemberId = "compound"
+            FirstName = "Patrick"
+            LastName = "Stevens"
+            HomeGymId = 1223
+            HomeGymName = "Arnie's Temple o' Gainz"
+            EmailAddress = "patrick@home"
+            GymAccessPin = "1234"
+            DateOfBirth = DateOnly (1992, 03, 04)
+            MobileNumber = "number"
+            Postcode = "postcode"
+            MembershipName = "member"
+            MembershipLevel = 9999
+            SuspendedReason = -1
+            MemberStatus = 100
+        }
+
+    [<Test>]
+    let ``Content-Type header is automatically inserted`` () =
+        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
+            async {
+                message.Method |> shouldEqual HttpMethod.Post
+
+                message.RequestUri.ToString ()
+                |> shouldEqual "https://example.com/endpoint/param"
+
+                let headers =
+                    [
+                        for h in message.Content.Headers do
+                            yield $"%s{h.Key}: %s{Seq.exactlyOne h.Value}"
+                    ]
+                    |> String.concat "\n"
+
+                let! ct = Async.CancellationToken
+                let! content = message.Content.ReadAsStringAsync ct |> Async.AwaitTask
+                content |> JsonNode.Parse |> Member.jsonParse |> shouldEqual pureGymMember
+
+                let content = new StringContent (headers)
+                let resp = new HttpResponseMessage (HttpStatusCode.OK)
+                resp.Content <- content
+                return resp
+            }
+
+        use client = HttpClientMock.make (Uri "https://example.com") proc
+
+        let api = ClientWithJsonBody.make client
+        let result = api.GetPathParam ("param", pureGymMember) |> _.Result
+
+        expect {
+            snapshot @"Content-Type: application/json; charset=utf-8"
+            return result
+        }
+
+    [<Test>]
+    let ``Content-Type header is respected if overridden`` () =
+        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
+            async {
+                message.Method |> shouldEqual HttpMethod.Post
+
+                message.RequestUri.ToString ()
+                |> shouldEqual "https://example.com/endpoint/param"
+
+                let headers =
+                    [
+                        for h in message.Content.Headers do
+                            yield $"%s{h.Key}: %s{Seq.exactlyOne h.Value}"
+                    ]
+                    |> String.concat "\n"
+
+                let! ct = Async.CancellationToken
+                let! content = message.Content.ReadAsStringAsync ct |> Async.AwaitTask
+                content |> JsonNode.Parse |> Member.jsonParse |> shouldEqual pureGymMember
+
+                let content = new StringContent (headers)
+                let resp = new HttpResponseMessage (HttpStatusCode.OK)
+                resp.Content <- content
+                return resp
+            }
+
+        use client = HttpClientMock.make (Uri "https://example.com") proc
+
+        let api = ClientWithJsonBodyOverridden.make client
+        let result = api.GetPathParam ("param", pureGymMember) |> _.Result
+
+        expect {
+            snapshot @"Content-Type: application/ecmascript; charset=utf-8"
+            return result
+        }
+
+    [<Test>]
+    let ``Content-Type header is the default for strings`` () =
+        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
+            async {
+                message.Method |> shouldEqual HttpMethod.Post
+
+                message.RequestUri.ToString ()
+                |> shouldEqual "https://example.com/endpoint/param"
+
+                let headers =
+                    [
+                        for h in message.Content.Headers do
+                            yield $"%s{h.Key}: %s{Seq.exactlyOne h.Value}"
+                    ]
+                    |> String.concat "\n"
+
+                let! ct = Async.CancellationToken
+                let! content = message.Content.ReadAsStringAsync ct |> Async.AwaitTask
+                content |> shouldEqual "hello!"
+
+                let content = new StringContent (headers)
+                let resp = new HttpResponseMessage (HttpStatusCode.OK)
+                resp.Content <- content
+                return resp
+            }
+
+        use client = HttpClientMock.make (Uri "https://example.com") proc
+
+        let api = ClientWithStringBody.make client
+        let result = api.GetPathParam ("param", "hello!") |> _.Result
+
+        expect {
+            snapshot @"Content-Type: text/plain; charset=utf-8"
+            return result
+        }
--- a/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestVaultClient.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestHttpClient/TestVaultClient.fs
@@ -87,8 +87,10 @@ module TestVaultClient =
    }
 }"""

-    [<Test>]
-    let ``URI example`` () =
+    [<TestCase 1>]
+    [<TestCase 2>]
+    [<TestCase 3>]
+    let ``URI example`` (vaultClientId : int) =
        let proc (message : HttpRequestMessage) : HttpResponseMessage Async =
            async {
                message.Method |> shouldEqual HttpMethod.Get
@@ -112,10 +114,25 @@ module TestVaultClient =
            }

        use client = HttpClientMock.make (Uri "https://my-vault.com") proc
-        let api = VaultClient.make client

-        let vaultResponse = api.GetJwt("role", "jwt").Result
-        let value = api.GetSecret(vaultResponse, "path", "mount").Result
+        let value =
+            match vaultClientId with
+            | 1 ->
+                let api = VaultClient.make client
+                let vaultResponse = api.GetJwt("role", "jwt").Result
+                let value = api.GetSecret(vaultResponse, "path", "mount").Result
+                value
+            | 2 ->
+                let api = VaultClientNonExtensionMethod.make client
+                let vaultResponse = api.GetJwt("role", "jwt").Result
+                let value = api.GetSecret(vaultResponse, "path", "mount").Result
+                value
+            | 3 ->
+                let api = VaultClientExtensionMethod.make client
+                let vaultResponse = api.GetJwt("role", "jwt").Result
+                let value = api.GetSecret(vaultResponse, "path", "mount").Result
+                value
+            | _ -> failwith $"Unrecognised ID: %i{vaultClientId}"

        value.Data
        |> Seq.toList
@@ -168,3 +185,5 @@ module TestVaultClient =
                "key8_1", "https://example.com/data8/1"
                "key8_2", "https://example.com/data8/2"
            ]
+
+    let _canSeePastExtensionMethod = VaultClientExtensionMethod.thisClashes
--- a/WoofWare.Myriad.Plugins.Test/TestJsonParse/TestExtensionMethod.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestJsonParse/TestExtensionMethod.fs
@@ -1,6 +1,7 @@
 namespace WoofWare.Myriad.Plugins.Test

 open System
+open System.Numerics
 open System.Text.Json.Nodes
 open ConsumePlugin
 open NUnit.Framework
@@ -12,15 +13,62 @@ module TestExtensionMethod =
    [<Test>]
    let ``Parse via extension method`` () =
        let json =
-            """{"tinker": "job", "tailor": 3, "soldier": "https://example.com", "sailor": 3.1}"""
+            """{
+    "alpha": "hello!",
+    "bravo": "https://example.com",
+    "charlie": 0.3341,
+    "delta": 110033.4,
+    "echo": -0.000993,
+    "foxtrot": -999999999999,
+    "golf": -123456789101112,
+    "hotel": 18446744073709551615,
+    "india": 99884,
+    "juliette": 12223334,
+    "kilo": -2147483642,
+    "lima": 4294967293,
+    "mike": -32767,
+    "november": 65533,
+    "oscar": -125,
+    "papa": 253,
+    "quebec": 254,
+    "tango": -3,
+    "uniform": 1004443.300988393349583009,
+    "victor": "x",
+    "whiskey": 123456123456123456123456123456123456123456
+}"""
            |> JsonNode.Parse

        let expected =
            {
-                Tinker = "job"
-                Tailor = 3
-                Soldier = Uri "https://example.com"
-                Sailor = 3.1
+                Alpha = "hello!"
+                Bravo = Uri "https://example.com"
+                Charlie = 0.3341
+                Delta = 110033.4f
+                Echo = -0.000993f
+                Foxtrot = -999999999999.0
+                Golf = -123456789101112L
+                Hotel = 18446744073709551615UL
+                India = 99884
+                Juliette = 12223334u
+                Kilo = -2147483642
+                Lima = 4294967293u
+                Mike = -32767s
+                November = 65533us
+                Oscar = -125y
+                Papa = 253uy
+                Quebec = 254uy
+                Tango = -3y
+                Uniform = 1004443.300988393349583009m
+                Victor = 'x'
+                Whiskey =
+                    let mutable i = BigInteger 0
+
+                    for _ = 0 to 6 do
+                        i <- i * BigInteger 1000000 + BigInteger 123456
+
+                    i
            }

-        ToGetExtensionMethod.jsonParse json |> shouldEqual expected
+        let actual = ToGetExtensionMethod.jsonParse json
+
+        actual |> shouldEqual expected
--- a/WoofWare.Myriad.Plugins.Test/TestJsonParse/TestJsonParse.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestJsonParse/TestJsonParse.fs
@@ -7,6 +7,8 @@ open FsUnitTyped

 [<TestFixture>]
 module TestJsonParse =
+    let _canSeePastExtensionMethod = ToGetExtensionMethod.thisModuleWouldClash
+
    [<Test>]
    let ``Single example`` () =
        let s =
@@ -47,3 +49,15 @@ module TestJsonParse =

        let actual = s |> JsonNode.Parse |> InnerType.jsonParse
        actual |> shouldEqual expected
+
+    [<TestCase("thing", SomeEnum.Thing)>]
+    [<TestCase("Thing", SomeEnum.Thing)>]
+    [<TestCase("THING", SomeEnum.Thing)>]
+    [<TestCase("blah", SomeEnum.Blah)>]
+    [<TestCase("Blah", SomeEnum.Blah)>]
+    [<TestCase("BLAH", SomeEnum.Blah)>]
+    let ``Can deserialise enum`` (str : string, expected : SomeEnum) =
+        sprintf "\"%s\"" str
+        |> JsonNode.Parse
+        |> SomeEnum.jsonParse
+        |> shouldEqual expected
--- a/WoofWare.Myriad.Plugins.Test/TestJsonSerialize/TestJsonSerde.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestJsonSerialize/TestJsonSerde.fs
@@ -2,10 +2,9 @@ namespace WoofWare.Myriad.Plugins.Test

 open System
 open System.Collections.Generic
-open System.IO
-open System.Text
-open System.Text.Json
 open System.Text.Json.Nodes
+open FsCheck.FSharp
+open Microsoft.FSharp.Reflection
 open NUnit.Framework
 open FsCheck
 open FsUnitTyped
@@ -16,21 +15,21 @@ module TestJsonSerde =

    let uriGen : Gen<Uri> =
        gen {
-            let! suffix = Arb.generate<int>
+            let! suffix = ArbMap.generate<int> ArbMap.defaults
            return Uri $"https://example.com/%i{suffix}"
        }

    let rec innerGen (count : int) : Gen<InnerTypeWithBoth> =
        gen {
-            let! guid = Arb.generate<Guid>
-            let! mapKeys = Gen.listOf Arb.generate<NonNull<string>>
+            let! guid = ArbMap.generate<Guid> ArbMap.defaults
+            let! mapKeys = Gen.listOf (ArbMap.generate<NonNull<string>> ArbMap.defaults)
            let mapKeys = mapKeys |> List.map _.Get |> List.distinct
            let! mapValues = Gen.listOfLength mapKeys.Length uriGen
            let map = List.zip mapKeys mapValues |> Map.ofList

            let! concreteDictKeys =
                if count > 0 then
-                    Gen.listOf Arb.generate<NonNull<string>>
+                    Gen.listOf (ArbMap.generate<NonNull<string>> ArbMap.defaults)
                else
                    Gen.constant []

@@ -51,13 +50,16 @@ module TestJsonSerde =
                |> List.map KeyValuePair
                |> Dictionary

-            let! readOnlyDictKeys = Gen.listOf Arb.generate<NonNull<string>>
+            let! readOnlyDictKeys = Gen.listOf (ArbMap.generate<NonNull<string>> ArbMap.defaults)
            let readOnlyDictKeys = readOnlyDictKeys |> List.map _.Get |> List.distinct
-            let! readOnlyDictValues = Gen.listOfLength readOnlyDictKeys.Length (Gen.listOf Arb.generate<char>)
+
+            let! readOnlyDictValues =
+                Gen.listOfLength readOnlyDictKeys.Length (Gen.listOf (ArbMap.generate<char> ArbMap.defaults))
+
            let readOnlyDict = List.zip readOnlyDictKeys readOnlyDictValues |> readOnlyDict

            let! dictKeys = Gen.listOf uriGen
-            let! dictValues = Gen.listOfLength dictKeys.Length Arb.generate<bool>
+            let! dictValues = Gen.listOfLength dictKeys.Length (ArbMap.generate<bool> ArbMap.defaults)
            let dict = List.zip dictKeys dictValues |> dict

            return
@@ -72,13 +74,38 @@ module TestJsonSerde =

    let outerGen : Gen<JsonRecordTypeWithBoth> =
        gen {
-            let! a = Arb.generate<int>
-            let! b = Arb.generate<NonNull<string>>
-            let! c = Gen.listOf Arb.generate<int>
+            let! a = ArbMap.generate<int> ArbMap.defaults
+            let! b = ArbMap.generate<NonNull<string>> ArbMap.defaults
+            let! c = Gen.listOf (ArbMap.generate<int> ArbMap.defaults)
            let! depth = Gen.choose (0, 2)
            let! d = innerGen depth
-            let! e = Gen.arrayOf Arb.generate<NonNull<string>>
-            let! f = Gen.arrayOf Arb.generate<int>
+            let! e = Gen.arrayOf (ArbMap.generate<NonNull<string>> ArbMap.defaults)
+            let! arr = Gen.arrayOf (ArbMap.generate<int> ArbMap.defaults)
+            let! byte = ArbMap.generate ArbMap.defaults
+            let! sbyte = ArbMap.generate ArbMap.defaults
+            let! i = ArbMap.generate ArbMap.defaults
+            let! i32 = ArbMap.generate ArbMap.defaults
+            let! i64 = ArbMap.generate ArbMap.defaults
+            let! u = ArbMap.generate ArbMap.defaults
+            let! u32 = ArbMap.generate ArbMap.defaults
+            let! u64 = ArbMap.generate ArbMap.defaults
+
+            let! f =
+                ArbMap.generate ArbMap.defaults
+                |> Gen.filter (fun s -> Double.IsFinite (s / 1.0<measure>))
+
+            let! f32 =
+                ArbMap.generate ArbMap.defaults
+                |> Gen.filter (fun s -> Single.IsFinite (s / 1.0f<measure>))
+
+            let! single =
+                ArbMap.generate ArbMap.defaults
+                |> Gen.filter (fun s -> Single.IsFinite (s / 1.0f<measure>))
+
+            let! intMeasureOption = ArbMap.generate ArbMap.defaults
+            let! intMeasureNullable = ArbMap.generate ArbMap.defaults
+            let! someEnum = Gen.choose (0, 1)
+            let! timestamp = ArbMap.generate ArbMap.defaults

            return
                {
@@ -87,7 +114,23 @@ module TestJsonSerde =
                    C = c
                    D = d
                    E = e |> Array.map _.Get
+                    Arr = arr
+                    Byte = byte
+                    Sbyte = sbyte
+                    I = i
+                    I32 = i32
+                    I64 = i64
+                    U = u
+                    U32 = u32
+                    U64 = u64
                    F = f
+                    F32 = f32
+                    Single = single
+                    IntMeasureOption = intMeasureOption
+                    IntMeasureNullable = intMeasureNullable
+                    Enum = enum<SomeEnum> someEnum
+                    Timestamp = timestamp
+                    Unit = ()
                }
        }

@@ -105,6 +148,82 @@ module TestJsonSerde =

        property |> Prop.forAll (Arb.fromGen outerGen) |> Check.QuickThrowOnFailure

+    [<Test>]
+    let ``Single example of big record`` () =
+        let guid = Guid.Parse "dfe24db5-9f8d-447b-8463-4c0bcf1166d5"
+
+        let data =
+            {
+                A = 3
+                B = "hello!"
+                C = [ 1 ; -9 ]
+                D =
+                    {
+                        Thing = guid
+                        Map = Map.ofList []
+                        ReadOnlyDict = readOnlyDict []
+                        Dict = dict []
+                        ConcreteDict = Dictionary ()
+                    }
+                E = [| "I'm-a-string" |]
+                Arr = [| -18883 ; 9100 |]
+                Byte = 87uy<measure>
+                Sbyte = 89y<measure>
+                I = 199993345<measure>
+                I32 = -485832<measure>
+                I64 = -13458625689L<measure>
+                U = 458582u<measure>
+                U32 = 857362147u<measure>
+                U64 = 1234567892123414596UL<measure>
+                F = 8833345667.1<measure>
+                F32 = 1000.98f<measure>
+                Single = 0.334f<measure>
+                IntMeasureOption = Some 981<measure>
+                IntMeasureNullable = Nullable -883<measure>
+                Enum = enum<SomeEnum> 1
+                Timestamp = DateTimeOffset (2024, 07, 01, 17, 54, 00, TimeSpan.FromHours 1.0)
+                Unit = ()
+            }
+
+        let expected =
+            """{
+    "a": 3,
+    "b": "hello!",
+    "c": [1, -9],
+    "d": {
+      "it\u0027s-a-me": "dfe24db5-9f8d-447b-8463-4c0bcf1166d5",
+      "map": {},
+      "readOnlyDict": {},
+      "dict": {},
+      "concreteDict": {}
+    },
+    "e": ["I\u0027m-a-string"],
+    "arr": [-18883, 9100],
+    "byte": 87,
+    "sbyte": 89,
+    "i": 199993345,
+    "i32": -485832,
+    "i64": -13458625689,
+    "u": 458582,
+    "u32": 857362147,
+    "u64": 1234567892123414596,
+    "f": 8833345667.1,
+    "f32": 1000.98,
+    "single": 0.334,
+    "intMeasureOption": 981,
+    "intMeasureNullable": -883,
+    "enum": 1,
+    "timestamp": "2024-07-01T17:54:00.0000000\u002B01:00",
+    "unit": {}
+}
+"""
+            |> fun s -> s.ToCharArray ()
+            |> Array.filter (fun c -> not (Char.IsWhiteSpace c))
+            |> fun s -> new String (s)
+
+        JsonRecordTypeWithBoth.toJsonNode(data).ToJsonString () |> shouldEqual expected
+        JsonRecordTypeWithBoth.jsonParse (JsonNode.Parse expected) |> shouldEqual data
+
    [<Test>]
    let ``Guids are treated just like strings`` () =
        let guidStr = "b1e7496e-6e79-4158-8579-a01de355d3b2"
@@ -124,3 +243,246 @@ module TestJsonSerde =
        |> shouldEqual (
            sprintf """{"it\u0027s-a-me":"%s","map":{},"readOnlyDict":{},"dict":{},"concreteDict":{}}""" guidStr
        )
+
+    type Generators =
+        static member TestCase () =
+            { new Arbitrary<InnerTypeWithBoth>() with
+                override x.Generator = innerGen 5
+            }
+
+    let sanitiseInner (r : InnerTypeWithBoth) : InnerTypeWithBoth =
+        {
+            Thing = r.Thing
+            Map = r.Map
+            ReadOnlyDict = r.ReadOnlyDict
+            Dict = r.Dict
+            ConcreteDict = r.ConcreteDict
+        }
+
+    let sanitiseRec (r : JsonRecordTypeWithBoth) : JsonRecordTypeWithBoth =
+        { r with
+            B = if isNull r.B then "<null>" else r.B
+            C =
+                if Object.ReferenceEquals (r.C, (null : obj)) then
+                    []
+                else
+                    r.C
+            D = sanitiseInner r.D
+            E = if isNull r.E then [||] else r.E
+            Arr =
+                if Object.ReferenceEquals (r.Arr, (null : obj)) then
+                    [||]
+                else
+                    r.Arr
+        }
+
+    let duGen =
+        gen {
+            let! case = Gen.choose (0, 2)
+
+            match case with
+            | 0 -> return FirstDu.EmptyCase
+            | 1 ->
+                let! s = ArbMap.generate<NonNull<string>> ArbMap.defaults
+                return FirstDu.Case1 s.Get
+            | 2 ->
+                let! i = ArbMap.generate<int> ArbMap.defaults
+                let! record = outerGen
+                return FirstDu.Case2 (record, i)
+            | _ -> return failwith $"unexpected: %i{case}"
+        }
+
+    [<Test>]
+    let ``Discriminated union works`` () =
+        let property (du : FirstDu) : unit =
+            du
+            |> FirstDu.toJsonNode
+            |> fun s -> s.ToJsonString ()
+            |> JsonNode.Parse
+            |> FirstDu.jsonParse
+            |> shouldEqual du
+
+        property |> Prop.forAll (Arb.fromGen duGen) |> Check.QuickThrowOnFailure
+
+    [<Test>]
+    let ``DU generator covers all cases`` () =
+        let cases = FSharpType.GetUnionCases typeof<FirstDu>
+        let counts = Array.zeroCreate<int> cases.Length
+
+        let decompose = FSharpValue.PreComputeUnionTagReader typeof<FirstDu>
+
+        let mutable i = 0
+
+        let property (du : FirstDu) =
+            let tag = decompose du
+            counts.[tag] <- counts.[tag] + 1
+            i <- i + 1
+            true
+
+        Check.One (Config.Quick, Prop.forAll (Arb.fromGen duGen) property)
+
+        for i in counts do
+            i |> shouldBeGreaterThan 0
+
+    let dict<'a, 'b when 'a : equality> (xs : ('a * 'b) seq) : Dictionary<'a, 'b> =
+        let result = Dictionary ()
+
+        for k, v in xs do
+            result.Add (k, v)
+
+        result
+
+    let inline makeJsonArr< ^t, ^u when ^u : (static member op_Implicit : ^t -> JsonNode) and ^u :> JsonNode>
+        (arr : ^t seq)
+        : JsonNode
+        =
+        let result = JsonArray ()
+
+        for a in arr do
+            result.Add a
+
+        result :> JsonNode
+
+    let normalise (d : Dictionary<'a, 'b>) : ('a * 'b) list =
+        d |> Seq.map (fun (KeyValue (a, b)) -> a, b) |> Seq.toList |> List.sortBy fst
+
+    [<Test>]
+    let ``Can collect extension data`` () =
+        let str =
+            """{
+    "message": { "header": "hi", "value": "bye" },
+    "something": 3,
+    "arr": ["egg", "toast"],
+    "str": "whatnot"
+}"""
+            |> JsonNode.Parse
+
+        let expected =
+            {
+                Rest =
+                    [
+                        "something", JsonNode.op_Implicit 3
+                        "arr", makeJsonArr [| "egg" ; "toast" |]
+                        "str", JsonNode.op_Implicit "whatnot"
+                    ]
+                    |> dict
+                Message =
+                    Some
+                        {
+                            Header = "hi"
+                            Value = "bye"
+                        }
+            }
+
+        let actual = CollectRemaining.jsonParse str
+
+        actual.Message |> shouldEqual expected.Message
+
+        normalise actual.Rest
+        |> List.map (fun (k, v) -> k, v.ToJsonString ())
+        |> shouldEqual (normalise expected.Rest |> List.map (fun (k, v) -> k, v.ToJsonString ()))
+
+    [<Test>]
+    let ``Can write out extension data`` () =
+        let expected =
+            """{"message":{"header":"hi","value":"bye"},"something":3,"arr":["egg","toast"],"str":"whatnot"}"""
+
+        let toWrite =
+            {
+                Rest =
+                    [
+                        "something", JsonNode.op_Implicit 3
+                        "arr", makeJsonArr [| "egg" ; "toast" |]
+                        "str", JsonNode.op_Implicit "whatnot"
+                    ]
+                    |> dict
+                Message =
+                    Some
+                        {
+                            Header = "hi"
+                            Value = "bye"
+                        }
+            }
+
+        let actual = CollectRemaining.toJsonNode toWrite |> fun s -> s.ToJsonString ()
+
+        actual |> shouldEqual expected
+
+    [<Test>]
+    let ``Can collect extension data, nested`` () =
+        let str =
+            """{
+  "thing": 99,
+  "baz": -123,
+  "remaining": {
+    "message": { "header": "hi", "value": "bye" },
+    "something": 3,
+    "arr": ["egg", "toast"],
+    "str": "whatnot"
+  }
+}"""
+            |> JsonNode.Parse
+
+        let expected : OuterCollectRemaining =
+            {
+                Remaining =
+                    {
+                        Message =
+                            Some
+                                {
+                                    Header = "hi"
+                                    Value = "bye"
+                                }
+                        Rest =
+                            [
+                                "something", JsonNode.op_Implicit 3
+                                "arr", makeJsonArr [| "egg" ; "toast" |]
+                                "str", JsonNode.op_Implicit "whatnot"
+                            ]
+                            |> dict
+                    }
+                Others = [ "thing", 99 ; "baz", -123 ] |> dict
+            }
+
+        let actual = OuterCollectRemaining.jsonParse str
+
+        normalise actual.Others |> shouldEqual (normalise expected.Others)
+
+        let actual = actual.Remaining
+        let expected = expected.Remaining
+
+        actual.Message |> shouldEqual expected.Message
+
+        normalise actual.Rest
+        |> List.map (fun (k, v) -> k, v.ToJsonString ())
+        |> shouldEqual (normalise expected.Rest |> List.map (fun (k, v) -> k, v.ToJsonString ()))
+
+    [<Test>]
+    let ``Can write out extension data, nested`` () =
+        let expected =
+            """{"thing":99,"baz":-123,"remaining":{"message":{"header":"hi","value":"bye"},"something":3,"arr":["egg","toast"],"str":"whatnot"}}"""
+
+        let toWrite : OuterCollectRemaining =
+            {
+                Others = [ "thing", 99 ; "baz", -123 ] |> dict
+                Remaining =
+                    {
+                        Rest =
+                            [
+                                "something", JsonNode.op_Implicit 3
+                                "arr", makeJsonArr [| "egg" ; "toast" |]
+                                "str", JsonNode.op_Implicit "whatnot"
+                            ]
+                            |> dict
+                        Message =
+                            Some
+                                {
+                                    Header = "hi"
+                                    Value = "bye"
+                                }
+                    }
+            }
+
+        let actual = OuterCollectRemaining.toJsonNode toWrite |> fun s -> s.ToJsonString ()
+
+        actual |> shouldEqual expected
--- a/WoofWare.Myriad.Plugins.Test/TestMockGenerator/TestMockGenerator.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestMockGenerator/TestMockGenerator.fs
@@ -34,3 +34,16 @@ module TestMockGenerator =
        mock.Mem1 3 'a' |> shouldEqual "aaa"
        mock.Mem2 (3, "hi") 'a' |> shouldEqual "hiahiahi"
        mock.Mem3 (3, "hi") 'a' |> shouldEqual "hiahiahi"
+
+    [<Test>]
+    let ``Example of use: properties`` () =
+        let mock : TypeWithProperties =
+            { TypeWithPropertiesMock.Empty with
+                Mem1 = fun i -> async { return Option.toArray i }
+                Prop1 = fun () -> 44
+            }
+            :> _
+
+        mock.Mem1 (Some "hi") |> Async.RunSynchronously |> shouldEqual [| "hi" |]
+
+        mock.Prop1 |> shouldEqual 44
--- a/WoofWare.Myriad.Plugins.Test/TestMockGenerator/TestMockGeneratorNoAttr.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestMockGenerator/TestMockGeneratorNoAttr.fs
@@ -0,0 +1,36 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System
+open SomeNamespace
+open NUnit.Framework
+open FsUnitTyped
+
+[<TestFixture>]
+module TestMockGeneratorNoAttr =
+
+    [<Test>]
+    let ``Example of use: IPublicType`` () =
+        let mock : IPublicTypeNoAttr =
+            { PublicTypeNoAttrMock.Empty with
+                Mem1 = fun (s, count) -> List.replicate count s
+            }
+            :> _
+
+        let _ =
+            Assert.Throws<NotImplementedException> (fun () -> mock.Mem2 "hi" |> ignore<int>)
+
+        mock.Mem1 ("hi", 3) |> shouldEqual [ "hi" ; "hi" ; "hi" ]
+
+    [<Test>]
+    let ``Example of use: curried args`` () =
+        let mock : CurriedNoAttr<_> =
+            { CurriedNoAttrMock.Empty () with
+                Mem1 = fun i c -> Array.replicate i c |> String
+                Mem2 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+                Mem3 = fun (i, s) c -> String.concat $"%c{c}" (List.replicate i s)
+            }
+            :> _
+
+        mock.Mem1 3 'a' |> shouldEqual "aaa"
+        mock.Mem2 (3, "hi") 'a' |> shouldEqual "hiahiahi"
+        mock.Mem3 (3, "hi") 'a' |> shouldEqual "hiahiahi"
--- a/WoofWare.Myriad.Plugins.Test/TestSurface.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestSurface.fs
@@ -12,7 +12,8 @@ module TestSurface =
    let ``Ensure API surface has not been modified`` () = ApiSurface.assertIdentical assembly

    [<Test>]
-    let ``Check version against remote`` () =
+    // https://github.com/nunit/nunit3-vs-adapter/issues/876
+    let CheckVersionAgainstRemote () =
        MonotonicVersion.validate assembly "WoofWare.Myriad.Plugins"

    [<Test ; Explicit>]
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/TestOpenApi3Parse.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/TestOpenApi3Parse.fs
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/TestSwaggerParse.fs
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/TestSwaggerParse.fs
@@ -0,0 +1,84 @@
+namespace WoofWare.Myriad.Plugins.Test
+
+open System.Text.Json.Nodes
+open NUnit.Framework
+open FsUnitTyped
+open WoofWare.Myriad.Plugins.SwaggerV2
+
+[<TestFixture>]
+module TestSwaggerParse =
+    [<Test>]
+    let ``Can parse parameters`` () : unit =
+        let s =
+            """{
+  "tags": [
+    "organization"
+  ],
+  "summary": "Check if a user is a member of an organization",
+  "operationId": "orgIsMember",
+  "parameters": [
+    {
+      "type": "string",
+      "description": "name of the organization",
+      "name": "org",
+      "in": "path",
+      "required": true
+    },
+    {
+      "type": "string",
+      "description": "username of the user",
+      "name": "username",
+      "in": "path",
+      "required": true
+    }
+  ],
+  "responses": {
+    "204": {
+      "description": "user is a member"
+    },
+    "303": {
+      "description": "redirection to /orgs/{org}/public_members/{username}"
+    },
+    "404": {
+      "description": "user is not a member"
+    }
+  }
+}
+"""
+            |> JsonNode.Parse
+
+        s.AsObject ()
+        |> SwaggerEndpoint.Parse
+        |> shouldEqual
+            {
+                Consumes = None
+                Produces = None
+                Tags = [ "organization" ]
+                Summary = "Check if a user is a member of an organization"
+                OperationId = OperationId "orgIsMember"
+                Parameters =
+                    [
+                        {
+                            Type = Definition.String
+                            Description = Some "name of the organization"
+                            Name = "org"
+                            In = ParameterIn.Path "org"
+                            Required = Some true
+                        }
+                        {
+                            Type = Definition.String
+                            Description = Some "username of the user"
+                            Name = "username"
+                            In = ParameterIn.Path "username"
+                            Required = Some true
+                        }
+                    ]
+                    |> Some
+                Responses =
+                    [
+                        204, Definition.Unspecified
+                        303, Definition.Unspecified
+                        404, Definition.Unspecified
+                    ]
+                    |> Map.ofList
+            }
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/api-with-examples.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/api-with-examples.json
@@ -0,0 +1,192 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Simple API overview",
+    "version": "2.0.0"
+  },
+  "paths": {
+    "/": {
+      "get": {
+        "operationId": "listVersionsv2",
+        "summary": "List API versions",
+        "responses": {
+          "200": {
+            "description": "200 response",
+            "content": {
+              "application/json": {
+                "examples": {
+                  "foo": {
+                    "value": {
+                      "versions": [
+                        {
+                          "status": "CURRENT",
+                          "updated": "2011-01-21T11:33:21Z",
+                          "id": "v2.0",
+                          "links": [
+                            {
+                              "href": "http://127.0.0.1:8774/v2/",
+                              "rel": "self"
+                            }
+                          ]
+                        },
+                        {
+                          "status": "EXPERIMENTAL",
+                          "updated": "2013-07-23T11:33:21Z",
+                          "id": "v3.0",
+                          "links": [
+                            {
+                              "href": "http://127.0.0.1:8774/v3/",
+                              "rel": "self"
+                            }
+                          ]
+                        }
+                      ]
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "300": {
+            "description": "300 response",
+            "content": {
+              "application/json": {
+                "examples": {
+                  "foo": {
+                    "value": {
+                      "versions": [
+                        {
+                          "status": "CURRENT",
+                          "updated": "2011-01-21T11:33:21Z",
+                          "id": "v2.0",
+                          "links": [
+                            {
+                              "href": "http://127.0.0.1:8774/v2/",
+                              "rel": "self"
+                            }
+                          ]
+                        },
+                        {
+                          "status": "EXPERIMENTAL",
+                          "updated": "2013-07-23T11:33:21Z",
+                          "id": "v3.0",
+                          "links": [
+                            {
+                              "href": "http://127.0.0.1:8774/v3/",
+                              "rel": "self"
+                            }
+                          ]
+                        }
+                      ]
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/v2": {
+      "get": {
+        "operationId": "getVersionDetailsv2",
+        "summary": "Show API version details",
+        "responses": {
+          "200": {
+            "description": "200 response",
+            "content": {
+              "application/json": {
+                "examples": {
+                  "foo": {
+                    "value": {
+                      "version": {
+                        "status": "CURRENT",
+                        "updated": "2011-01-21T11:33:21Z",
+                        "media-types": [
+                          {
+                            "base": "application/xml",
+                            "type": "application/vnd.openstack.compute+xml;version=2"
+                          },
+                          {
+                            "base": "application/json",
+                            "type": "application/vnd.openstack.compute+json;version=2"
+                          }
+                        ],
+                        "id": "v2.0",
+                        "links": [
+                          {
+                            "href": "http://127.0.0.1:8774/v2/",
+                            "rel": "self"
+                          },
+                          {
+                            "href": "http://docs.openstack.org/api/openstack-compute/2/os-compute-devguide-2.pdf",
+                            "type": "application/pdf",
+                            "rel": "describedby"
+                          },
+                          {
+                            "href": "http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl",
+                            "type": "application/vnd.sun.wadl+xml",
+                            "rel": "describedby"
+                          },
+                          {
+                            "href": "http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl",
+                            "type": "application/vnd.sun.wadl+xml",
+                            "rel": "describedby"
+                          }
+                        ]
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "203": {
+            "description": "203 response",
+            "content": {
+              "application/json": {
+                "examples": {
+                  "foo": {
+                    "value": {
+                      "version": {
+                        "status": "CURRENT",
+                        "updated": "2011-01-21T11:33:21Z",
+                        "media-types": [
+                          {
+                            "base": "application/xml",
+                            "type": "application/vnd.openstack.compute+xml;version=2"
+                          },
+                          {
+                            "base": "application/json",
+                            "type": "application/vnd.openstack.compute+json;version=2"
+                          }
+                        ],
+                        "id": "v2.0",
+                        "links": [
+                          {
+                            "href": "http://23.253.228.211:8774/v2/",
+                            "rel": "self"
+                          },
+                          {
+                            "href": "http://docs.openstack.org/api/openstack-compute/2/os-compute-devguide-2.pdf",
+                            "type": "application/pdf",
+                            "rel": "describedby"
+                          },
+                          {
+                            "href": "http://docs.openstack.org/api/openstack-compute/2/wadl/os-compute-2.wadl",
+                            "type": "application/vnd.sun.wadl+xml",
+                            "rel": "describedby"
+                          }
+                        ]
+                      }
+                    }
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/callback-example.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/callback-example.json
@@ -0,0 +1,82 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Callback Example",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/streams": {
+      "post": {
+        "description": "subscribes a client to receive out-of-band data",
+        "parameters": [
+          {
+            "name": "callbackUrl",
+            "in": "query",
+            "required": true,
+            "description": "the location where data will be sent.  Must be network accessible\nby the source server\n",
+            "schema": {
+              "type": "string",
+              "format": "uri",
+              "example": "https://tonys-server.com"
+            }
+          }
+        ],
+        "responses": {
+          "201": {
+            "description": "subscription successfully created",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "description": "subscription information",
+                  "required": ["subscriptionId"],
+                  "properties": {
+                    "subscriptionId": {
+                      "description": "this unique identifier allows management of the subscription",
+                      "type": "string",
+                      "example": "2531329f-fb09-4ef7-887e-84e648214436"
+                    }
+                  }
+                }
+              }
+            }
+          }
+        },
+        "callbacks": {
+          "onData": {
+            "{$request.query.callbackUrl}/data": {
+              "post": {
+                "requestBody": {
+                  "description": "subscription payload",
+                  "content": {
+                    "application/json": {
+                      "schema": {
+                        "type": "object",
+                        "properties": {
+                          "timestamp": {
+                            "type": "string",
+                            "format": "date-time"
+                          },
+                          "userData": {
+                            "type": "string"
+                          }
+                        }
+                      }
+                    }
+                  }
+                },
+                "responses": {
+                  "202": {
+                    "description": "Your server implementation should return this HTTP status code\nif the data was received successfully\n"
+                  },
+                  "204": {
+                    "description": "Your server should return this HTTP status code if no longer interested\nin further updates\n"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/link-example.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/link-example.json
@@ -0,0 +1,319 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "title": "Link Example",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/2.0/users/{username}": {
+      "get": {
+        "operationId": "getUserByName",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The User",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/user"
+                }
+              }
+            },
+            "links": {
+              "userRepositories": {
+                "$ref": "#/components/links/UserRepositories"
+              }
+            }
+          }
+        }
+      }
+    },
+    "/2.0/repositories/{username}": {
+      "get": {
+        "operationId": "getRepositoriesByOwner",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "repositories owned by the supplied user",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/repository"
+                  }
+                }
+              }
+            },
+            "links": {
+              "userRepository": {
+                "$ref": "#/components/links/UserRepository"
+              }
+            }
+          }
+        }
+      }
+    },
+    "/2.0/repositories/{username}/{slug}": {
+      "get": {
+        "operationId": "getRepository",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "slug",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The repository",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/repository"
+                }
+              }
+            },
+            "links": {
+              "repositoryPullRequests": {
+                "$ref": "#/components/links/RepositoryPullRequests"
+              }
+            }
+          }
+        }
+      }
+    },
+    "/2.0/repositories/{username}/{slug}/pullrequests": {
+      "get": {
+        "operationId": "getPullRequestsByRepository",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "slug",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "state",
+            "in": "query",
+            "schema": {
+              "type": "string",
+              "enum": ["open", "merged", "declined"]
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "an array of pull request objects",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/pullrequest"
+                  }
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/2.0/repositories/{username}/{slug}/pullrequests/{pid}": {
+      "get": {
+        "operationId": "getPullRequestsById",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "slug",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "pid",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "a pull request object",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/pullrequest"
+                }
+              }
+            },
+            "links": {
+              "pullRequestMerge": {
+                "$ref": "#/components/links/PullRequestMerge"
+              }
+            }
+          }
+        }
+      }
+    },
+    "/2.0/repositories/{username}/{slug}/pullrequests/{pid}/merge": {
+      "post": {
+        "operationId": "mergePullRequest",
+        "parameters": [
+          {
+            "name": "username",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "slug",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "pid",
+            "in": "path",
+            "required": true,
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "204": {
+            "description": "the PR was successfully merged"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "links": {
+      "UserRepositories": {
+        "operationId": "getRepositoriesByOwner",
+        "parameters": {
+          "username": "$response.body#/username"
+        }
+      },
+      "UserRepository": {
+        "operationId": "getRepository",
+        "parameters": {
+          "username": "$response.body#/owner/username",
+          "slug": "$response.body#/slug"
+        }
+      },
+      "RepositoryPullRequests": {
+        "operationId": "getPullRequestsByRepository",
+        "parameters": {
+          "username": "$response.body#/owner/username",
+          "slug": "$response.body#/slug"
+        }
+      },
+      "PullRequestMerge": {
+        "operationId": "mergePullRequest",
+        "parameters": {
+          "username": "$response.body#/author/username",
+          "slug": "$response.body#/repository/slug",
+          "pid": "$response.body#/id"
+        }
+      }
+    },
+    "schemas": {
+      "user": {
+        "type": "object",
+        "properties": {
+          "username": {
+            "type": "string"
+          },
+          "uuid": {
+            "type": "string"
+          }
+        }
+      },
+      "repository": {
+        "type": "object",
+        "properties": {
+          "slug": {
+            "type": "string"
+          },
+          "owner": {
+            "$ref": "#/components/schemas/user"
+          }
+        }
+      },
+      "pullrequest": {
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "integer"
+          },
+          "title": {
+            "type": "string"
+          },
+          "repository": {
+            "$ref": "#/components/schemas/repository"
+          },
+          "author": {
+            "$ref": "#/components/schemas/user"
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/non-oauth-scopes.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/non-oauth-scopes.json
@@ -0,0 +1,28 @@
+{
+  "openapi": "3.1.0",
+  "info": {
+    "title": "Non-oAuth Scopes example",
+    "version": "1.0.0"
+  },
+  "paths": {
+    "/users": {
+      "get": {
+        "security": [
+          {
+            "bearerAuth": ["read:users", "public"]
+          }
+        ]
+      }
+    }
+  },
+  "components": {
+    "securitySchemes": {
+      "bearerAuth": {
+        "type": "http",
+        "scheme": "bearer",
+        "bearerFormat": "jwt",
+        "description": "note: non-oauth scopes are not defined at the securityScheme level"
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/petstore-expanded.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/petstore-expanded.json
@@ -0,0 +1,235 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "version": "1.0.0",
+    "title": "Swagger Petstore",
+    "description": "A sample API that uses a petstore as an example to demonstrate features in the OpenAPI 3.0 specification",
+    "termsOfService": "http://swagger.io/terms/",
+    "contact": {
+      "name": "Swagger API Team",
+      "email": "apiteam@swagger.io",
+      "url": "http://swagger.io"
+    },
+    "license": {
+      "name": "Apache 2.0",
+      "url": "https://www.apache.org/licenses/LICENSE-2.0.html"
+    }
+  },
+  "servers": [
+    {
+      "url": "https://petstore.swagger.io/v2"
+    }
+  ],
+  "paths": {
+    "/pets": {
+      "get": {
+        "description": "Returns all pets from the system that the user has access to\nNam sed condimentum est. Maecenas tempor sagittis sapien, nec rhoncus sem sagittis sit amet. Aenean at gravida augue, ac iaculis sem. Curabitur odio lorem, ornare eget elementum nec, cursus id lectus. Duis mi turpis, pulvinar ac eros ac, tincidunt varius justo. In hac habitasse platea dictumst. Integer at adipiscing ante, a sagittis ligula. Aenean pharetra tempor ante molestie imperdiet. Vivamus id aliquam diam. Cras quis velit non tortor eleifend sagittis. Praesent at enim pharetra urna volutpat venenatis eget eget mauris. In eleifend fermentum facilisis. Praesent enim enim, gravida ac sodales sed, placerat id erat. Suspendisse lacus dolor, consectetur non augue vel, vehicula interdum libero. Morbi euismod sagittis libero sed lacinia.\n\nSed tempus felis lobortis leo pulvinar rutrum. Nam mattis velit nisl, eu condimentum ligula luctus nec. Phasellus semper velit eget aliquet faucibus. In a mattis elit. Phasellus vel urna viverra, condimentum lorem id, rhoncus nibh. Ut pellentesque posuere elementum. Sed a varius odio. Morbi rhoncus ligula libero, vel eleifend nunc tristique vitae. Fusce et sem dui. Aenean nec scelerisque tortor. Fusce malesuada accumsan magna vel tempus. Quisque mollis felis eu dolor tristique, sit amet auctor felis gravida. Sed libero lorem, molestie sed nisl in, accumsan tempor nisi. Fusce sollicitudin massa ut lacinia mattis. Sed vel eleifend lorem. Pellentesque vitae felis pretium, pulvinar elit eu, euismod sapien.\n",
+        "operationId": "findPets",
+        "parameters": [
+          {
+            "name": "tags",
+            "in": "query",
+            "description": "tags to filter by",
+            "required": false,
+            "style": "form",
+            "schema": {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            }
+          },
+          {
+            "name": "limit",
+            "in": "query",
+            "description": "maximum number of results to return",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "format": "int32"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "pet response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "$ref": "#/components/schemas/Pet"
+                  }
+                }
+              }
+            }
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "description": "Creates a new pet in the store. Duplicates are allowed",
+        "operationId": "addPet",
+        "requestBody": {
+          "description": "Pet to add to the store",
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/NewPet"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "pet response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pet"
+                }
+              }
+            }
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/pets/{id}": {
+      "get": {
+        "description": "Returns a user based on a single ID, if the user does not have access to the pet",
+        "operationId": "find pet by id",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "description": "ID of pet to fetch",
+            "required": true,
+            "schema": {
+              "type": "integer",
+              "format": "int64"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "pet response",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pet"
+                }
+              }
+            }
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "delete": {
+        "description": "deletes a single pet based on the ID supplied",
+        "operationId": "deletePet",
+        "parameters": [
+          {
+            "name": "id",
+            "in": "path",
+            "description": "ID of pet to delete",
+            "required": true,
+            "schema": {
+              "type": "integer",
+              "format": "int64"
+            }
+          }
+        ],
+        "responses": {
+          "204": {
+            "description": "pet deleted"
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Pet": {
+        "allOf": [
+          {
+            "$ref": "#/components/schemas/NewPet"
+          },
+          {
+            "type": "object",
+            "required": ["id"],
+            "properties": {
+              "id": {
+                "type": "integer",
+                "format": "int64"
+              }
+            }
+          }
+        ]
+      },
+      "NewPet": {
+        "type": "object",
+        "required": ["name"],
+        "properties": {
+          "name": {
+            "type": "string"
+          },
+          "tag": {
+            "type": "string"
+          }
+        }
+      },
+      "Error": {
+        "type": "object",
+        "required": ["code", "message"],
+        "properties": {
+          "code": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/petstore.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/petstore.json
@@ -0,0 +1,177 @@
+{
+  "openapi": "3.0.0",
+  "info": {
+    "version": "1.0.0",
+    "title": "Swagger Petstore",
+    "license": {
+      "name": "MIT"
+    }
+  },
+  "servers": [
+    {
+      "url": "http://petstore.swagger.io/v1"
+    }
+  ],
+  "paths": {
+    "/pets": {
+      "get": {
+        "summary": "List all pets",
+        "operationId": "listPets",
+        "tags": ["pets"],
+        "parameters": [
+          {
+            "name": "limit",
+            "in": "query",
+            "description": "How many items to return at one time (max 100)",
+            "required": false,
+            "schema": {
+              "type": "integer",
+              "maximum": 100,
+              "format": "int32"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "A paged array of pets",
+            "headers": {
+              "x-next": {
+                "description": "A link to the next page of responses",
+                "schema": {
+                  "type": "string"
+                }
+              }
+            },
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pets"
+                }
+              }
+            }
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      },
+      "post": {
+        "summary": "Create a pet",
+        "operationId": "createPets",
+        "tags": ["pets"],
+        "requestBody": {
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/Pet"
+              }
+            }
+          },
+          "required": true
+        },
+        "responses": {
+          "201": {
+            "description": "Null response"
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/pets/{petId}": {
+      "get": {
+        "summary": "Info for a specific pet",
+        "operationId": "showPetById",
+        "tags": ["pets"],
+        "parameters": [
+          {
+            "name": "petId",
+            "in": "path",
+            "required": true,
+            "description": "The id of the pet to retrieve",
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Expected response to a valid request",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Pet"
+                }
+              }
+            }
+          },
+          "default": {
+            "description": "unexpected error",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/Error"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Pet": {
+        "type": "object",
+        "required": ["id", "name"],
+        "properties": {
+          "id": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "name": {
+            "type": "string"
+          },
+          "tag": {
+            "type": "string"
+          }
+        }
+      },
+      "Pets": {
+        "type": "array",
+        "maxItems": 100,
+        "items": {
+          "$ref": "#/components/schemas/Pet"
+        }
+      },
+      "Error": {
+        "type": "object",
+        "required": ["code", "message"],
+        "properties": {
+          "code": {
+            "type": "integer",
+            "format": "int32"
+          },
+          "message": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/tictactoe.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/tictactoe.json
@@ -0,0 +1,261 @@
+{
+  "openapi": "3.1.0",
+  "info": {
+    "title": "Tic Tac Toe",
+    "description": "This API allows writing down marks on a Tic Tac Toe board\nand requesting the state of the board or of individual squares.\n",
+    "version": "1.0.0"
+  },
+  "tags": [
+    {
+      "name": "Gameplay"
+    }
+  ],
+  "paths": {
+    "/board": {
+      "get": {
+        "summary": "Get the whole board",
+        "description": "Retrieves the current state of the board and the winner.",
+        "tags": ["Gameplay"],
+        "operationId": "get-board",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/status"
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "defaultApiKey": []
+          },
+          {
+            "app2AppOauth": ["board:read"]
+          }
+        ]
+      }
+    },
+    "/board/{row}/{column}": {
+      "parameters": [
+        {
+          "$ref": "#/components/parameters/rowParam"
+        },
+        {
+          "$ref": "#/components/parameters/columnParam"
+        }
+      ],
+      "get": {
+        "summary": "Get a single board square",
+        "description": "Retrieves the requested square.",
+        "tags": ["Gameplay"],
+        "operationId": "get-square",
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/mark"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "The provided parameters are incorrect",
+            "content": {
+              "text/html": {
+                "schema": {
+                  "$ref": "#/components/schemas/errorMessage"
+                },
+                "example": "Illegal coordinates"
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "bearerHttpAuthentication": []
+          },
+          {
+            "user2AppOauth": ["board:read"]
+          }
+        ]
+      },
+      "put": {
+        "summary": "Set a single board square",
+        "description": "Places a mark on the board and retrieves the whole board and the winner (if any).",
+        "tags": ["Gameplay"],
+        "operationId": "put-square",
+        "requestBody": {
+          "required": true,
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/mark"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "OK",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/status"
+                }
+              }
+            }
+          },
+          "400": {
+            "description": "The provided parameters are incorrect",
+            "content": {
+              "text/html": {
+                "schema": {
+                  "$ref": "#/components/schemas/errorMessage"
+                },
+                "examples": {
+                  "illegalCoordinates": {
+                    "value": "Illegal coordinates."
+                  },
+                  "notEmpty": {
+                    "value": "Square is not empty."
+                  },
+                  "invalidMark": {
+                    "value": "Invalid Mark (X or O)."
+                  }
+                }
+              }
+            }
+          }
+        },
+        "security": [
+          {
+            "bearerHttpAuthentication": []
+          },
+          {
+            "user2AppOauth": ["board:write"]
+          }
+        ]
+      }
+    }
+  },
+  "components": {
+    "parameters": {
+      "rowParam": {
+        "description": "Board row (vertical coordinate)",
+        "name": "row",
+        "in": "path",
+        "required": true,
+        "schema": {
+          "$ref": "#/components/schemas/coordinate"
+        }
+      },
+      "columnParam": {
+        "description": "Board column (horizontal coordinate)",
+        "name": "column",
+        "in": "path",
+        "required": true,
+        "schema": {
+          "$ref": "#/components/schemas/coordinate"
+        }
+      }
+    },
+    "schemas": {
+      "errorMessage": {
+        "type": "string",
+        "maxLength": 256,
+        "description": "A text message describing an error"
+      },
+      "coordinate": {
+        "type": "integer",
+        "minimum": 1,
+        "maximum": 3,
+        "example": 1
+      },
+      "mark": {
+        "type": "string",
+        "enum": [".", "X", "O"],
+        "description": "Possible values for a board square. `.` means empty square.",
+        "example": "."
+      },
+      "board": {
+        "type": "array",
+        "maxItems": 3,
+        "minItems": 3,
+        "items": {
+          "type": "array",
+          "maxItems": 3,
+          "minItems": 3,
+          "items": {
+            "$ref": "#/components/schemas/mark"
+          }
+        }
+      },
+      "winner": {
+        "type": "string",
+        "enum": [".", "X", "O"],
+        "description": "Winner of the game. `.` means nobody has won yet.",
+        "example": "."
+      },
+      "status": {
+        "type": "object",
+        "properties": {
+          "winner": {
+            "$ref": "#/components/schemas/winner"
+          },
+          "board": {
+            "$ref": "#/components/schemas/board"
+          }
+        }
+      }
+    },
+    "securitySchemes": {
+      "defaultApiKey": {
+        "description": "API key provided in console",
+        "type": "apiKey",
+        "name": "api-key",
+        "in": "header"
+      },
+      "basicHttpAuthentication": {
+        "description": "Basic HTTP Authentication",
+        "type": "http",
+        "scheme": "Basic"
+      },
+      "bearerHttpAuthentication": {
+        "description": "Bearer token using a JWT",
+        "type": "http",
+        "scheme": "Bearer",
+        "bearerFormat": "JWT"
+      },
+      "app2AppOauth": {
+        "type": "oauth2",
+        "flows": {
+          "clientCredentials": {
+            "tokenUrl": "https://learn.openapis.org/oauth/2.0/token",
+            "scopes": {
+              "board:read": "Read the board"
+            }
+          }
+        }
+      },
+      "user2AppOauth": {
+        "type": "oauth2",
+        "flows": {
+          "authorizationCode": {
+            "authorizationUrl": "https://learn.openapis.org/oauth/2.0/auth",
+            "tokenUrl": "https://learn.openapis.org/oauth/2.0/token",
+            "scopes": {
+              "board:read": "Read the board",
+              "board:write": "Write to the board"
+            }
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/uspto.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/uspto.json
@@ -0,0 +1,241 @@
+{
+  "openapi": "3.0.1",
+  "servers": [
+    {
+      "url": "{scheme}://developer.uspto.gov/ds-api",
+      "variables": {
+        "scheme": {
+          "description": "The Data Set API is accessible via https and http",
+          "enum": ["https", "http"],
+          "default": "https"
+        }
+      }
+    }
+  ],
+  "info": {
+    "description": "The Data Set API (DSAPI) allows the public users to discover and search USPTO exported data sets. This is a generic API that allows USPTO users to make any CSV based data files searchable through API. With the help of GET call, it returns the list of data fields that are searchable. With the help of POST call, data can be fetched based on the filters on the field names. Please note that POST call is used to search the actual data. The reason for the POST call is that it allows users to specify any complex search criteria without worry about the GET size limitations as well as encoding of the input parameters.",
+    "version": "1.0.0",
+    "title": "USPTO Data Set API",
+    "contact": {
+      "name": "Open Data Portal",
+      "url": "https://developer.uspto.gov",
+      "email": "developer@uspto.gov"
+    }
+  },
+  "tags": [
+    {
+      "name": "metadata",
+      "description": "Find out about the data sets"
+    },
+    {
+      "name": "search",
+      "description": "Search a data set"
+    }
+  ],
+  "paths": {
+    "/": {
+      "get": {
+        "tags": ["metadata"],
+        "operationId": "list-data-sets",
+        "summary": "List available data sets",
+        "responses": {
+          "200": {
+            "description": "Returns a list of data sets",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "$ref": "#/components/schemas/dataSetList"
+                },
+                "example": {
+                  "total": 2,
+                  "apis": [
+                    {
+                      "apiKey": "oa_citations",
+                      "apiVersionNumber": "v1",
+                      "apiUrl": "https://developer.uspto.gov/ds-api/oa_citations/v1/fields",
+                      "apiDocumentationUrl": "https://developer.uspto.gov/ds-api-docs/index.html?url=https://developer.uspto.gov/ds-api/swagger/docs/oa_citations.json"
+                    },
+                    {
+                      "apiKey": "cancer_moonshot",
+                      "apiVersionNumber": "v1",
+                      "apiUrl": "https://developer.uspto.gov/ds-api/cancer_moonshot/v1/fields",
+                      "apiDocumentationUrl": "https://developer.uspto.gov/ds-api-docs/index.html?url=https://developer.uspto.gov/ds-api/swagger/docs/cancer_moonshot.json"
+                    }
+                  ]
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/{dataset}/{version}/fields": {
+      "get": {
+        "tags": ["metadata"],
+        "summary": "Provides the general information about the API and the list of fields that can be used to query the dataset.",
+        "description": "This GET API returns the list of all the searchable field names that are in the oa_citations. Please see the 'fields' attribute which returns an array of field names. Each field or a combination of fields can be searched using the syntax options shown below.",
+        "operationId": "list-searchable-fields",
+        "parameters": [
+          {
+            "name": "dataset",
+            "in": "path",
+            "description": "Name of the dataset.",
+            "required": true,
+            "example": "oa_citations",
+            "schema": {
+              "type": "string"
+            }
+          },
+          {
+            "name": "version",
+            "in": "path",
+            "description": "Version of the dataset.",
+            "required": true,
+            "example": "v1",
+            "schema": {
+              "type": "string"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "The dataset API for the given version is found and it is accessible to consume.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "The combination of dataset name and version is not found in the system or it is not published yet to be consumed by public.",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "string"
+                }
+              }
+            }
+          }
+        }
+      }
+    },
+    "/{dataset}/{version}/records": {
+      "post": {
+        "tags": ["search"],
+        "summary": "Provides search capability for the data set with the given search criteria.",
+        "description": "This API is based on Solr/Lucene Search. The data is indexed using SOLR. This GET API returns the list of all the searchable field names that are in the Solr Index. Please see the 'fields' attribute which returns an array of field names. Each field or a combination of fields can be searched using the Solr/Lucene Syntax. Please refer https://lucene.apache.org/core/3_6_2/queryparsersyntax.html#Overview for the query syntax. List of field names that are searchable can be determined using above GET api.",
+        "operationId": "perform-search",
+        "parameters": [
+          {
+            "name": "version",
+            "in": "path",
+            "description": "Version of the dataset.",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "default": "v1"
+            }
+          },
+          {
+            "name": "dataset",
+            "in": "path",
+            "description": "Name of the dataset. In this case, the default value is oa_citations",
+            "required": true,
+            "schema": {
+              "type": "string",
+              "default": "oa_citations"
+            }
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "successful operation",
+            "content": {
+              "application/json": {
+                "schema": {
+                  "type": "array",
+                  "items": {
+                    "type": "object",
+                    "additionalProperties": {
+                      "type": "object"
+                    }
+                  }
+                }
+              }
+            }
+          },
+          "404": {
+            "description": "No matching record found for the given criteria."
+          }
+        },
+        "requestBody": {
+          "content": {
+            "application/x-www-form-urlencoded": {
+              "schema": {
+                "type": "object",
+                "properties": {
+                  "criteria": {
+                    "description": "Uses Lucene Query Syntax in the format of propertyName:value, propertyName:[num1 TO num2] and date range format: propertyName:[yyyyMMdd TO yyyyMMdd]. In the response please see the 'docs' element which has the list of record objects. Each record structure would consist of all the fields and their corresponding values.",
+                    "type": "string",
+                    "default": "*:*"
+                  },
+                  "start": {
+                    "description": "Starting record number. Default value is 0.",
+                    "type": "integer",
+                    "default": 0
+                  },
+                  "rows": {
+                    "description": "Specify number of rows to be returned. If you run the search with default values, in the response you will see 'numFound' attribute which will tell the number of records available in the dataset.",
+                    "type": "integer",
+                    "default": 100
+                  }
+                },
+                "required": ["criteria"]
+              }
+            }
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "dataSetList": {
+        "type": "object",
+        "properties": {
+          "total": {
+            "type": "integer"
+          },
+          "apis": {
+            "type": "array",
+            "items": {
+              "type": "object",
+              "properties": {
+                "apiKey": {
+                  "type": "string",
+                  "description": "To be used as a dataset parameter value"
+                },
+                "apiVersionNumber": {
+                  "type": "string",
+                  "description": "To be used as a version parameter value"
+                },
+                "apiUrl": {
+                  "type": "string",
+                  "format": "uriref",
+                  "description": "The URL describing the dataset's fields"
+                },
+                "apiDocumentationUrl": {
+                  "type": "string",
+                  "format": "uriref",
+                  "description": "A URL to the API console for each API"
+                }
+              }
+            }
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/TestSwagger/webhook-example.json
+++ b/WoofWare.Myriad.Plugins.Test/TestSwagger/webhook-example.json
@@ -0,0 +1,47 @@
+{
+  "openapi": "3.1.0",
+  "info": {
+    "title": "Webhook Example",
+    "version": "1.0.0"
+  },
+  "webhooks": {
+    "newPet": {
+      "post": {
+        "requestBody": {
+          "description": "Information about a new pet in the system",
+          "content": {
+            "application/json": {
+              "schema": {
+                "$ref": "#/components/schemas/Pet"
+              }
+            }
+          }
+        },
+        "responses": {
+          "200": {
+            "description": "Return a 200 status to indicate that the data was received successfully"
+          }
+        }
+      }
+    }
+  },
+  "components": {
+    "schemas": {
+      "Pet": {
+        "required": ["id", "name"],
+        "properties": {
+          "id": {
+            "type": "integer",
+            "format": "int64"
+          },
+          "name": {
+            "type": "string"
+          },
+          "tag": {
+            "type": "string"
+          }
+        }
+      }
+    }
+  }
+}
--- a/WoofWare.Myriad.Plugins.Test/WoofWare.Myriad.Plugins.Test.fsproj
+++ b/WoofWare.Myriad.Plugins.Test/WoofWare.Myriad.Plugins.Test.fsproj
@@ -1,14 +1,21 @@
 <Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net9.0</TargetFramework>
    <IsPackable>false</IsPackable>
    <IsTestProject>true</IsTestProject>
+    <!--
+      Known high severity vulnerability
+      I have not yet seen a single instance where I care about this warning
+    -->
+    <NoWarn>$(NoWarn),NU1903</NoWarn>
+    <TestingPlatformDotnetTestSupport>true</TestingPlatformDotnetTestSupport>
  </PropertyGroup>

  <ItemGroup>
-    <Compile Include="HttpClient.fs"/>
-    <Compile Include="PureGymDtos.fs"/>
+    <Compile Include="Assembly.fs" />
+    <Compile Include="HttpClient.fs" />
+    <Compile Include="PureGymDtos.fs" />
    <Compile Include="TestJsonParse\TestJsonParse.fs" />
    <Compile Include="TestJsonParse\TestPureGymJson.fs" />
    <Compile Include="TestJsonParse\TestExtensionMethod.fs" />
@@ -21,29 +28,45 @@
    <Compile Include="TestHttpClient\TestVaultClient.fs" />
    <Compile Include="TestHttpClient\TestVariableHeader.fs" />
    <Compile Include="TestMockGenerator\TestMockGenerator.fs" />
+    <Compile Include="TestMockGenerator\TestMockGeneratorNoAttr.fs" />
+    <Compile Include="TestCapturingMockGenerator\TestCapturingMockGenerator.fs" />
+    <Compile Include="TestCapturingMockGenerator\TestCapturingMockGeneratorNoAttr.fs" />
    <Compile Include="TestJsonSerialize\TestJsonSerde.fs" />
    <Compile Include="TestCataGenerator\TestCataGenerator.fs" />
    <Compile Include="TestCataGenerator\TestDirectory.fs" />
    <Compile Include="TestCataGenerator\TestGift.fs" />
    <Compile Include="TestCataGenerator\TestMyList.fs" />
    <Compile Include="TestCataGenerator\TestMyList2.fs" />
-    <Compile Include="TestRemoveOptions.fs"/>
-    <Compile Include="TestSurface.fs"/>
+    <Compile Include="TestArgParser\TestArgParser.fs" />
+    <Compile Include="TestSwagger\TestSwaggerParse.fs" />
+    <Compile Include="TestSwagger\TestOpenApi3Parse.fs" />
+    <EmbeddedResource Include="TestSwagger\api-with-examples.json" />
+    <EmbeddedResource Include="TestSwagger\callback-example.json" />
+    <EmbeddedResource Include="TestSwagger\link-example.json" />
+    <EmbeddedResource Include="TestSwagger\non-oauth-scopes.json" />
+    <EmbeddedResource Include="TestSwagger\petstore.json" />
+    <EmbeddedResource Include="TestSwagger\petstore-expanded.json" />
+    <EmbeddedResource Include="TestSwagger\tictactoe.json" />
+    <EmbeddedResource Include="TestSwagger\uspto.json" />
+    <EmbeddedResource Include="TestSwagger\webhook-example.json" />
+    <Compile Include="TestRemoveOptions.fs" />
+    <Compile Include="TestSurface.fs" />
    <None Include="../.github/workflows/dotnet.yaml" />
  </ItemGroup>

  <ItemGroup>
-    <PackageReference Include="ApiSurface" Version="4.0.33"/>
-    <PackageReference Include="FsCheck" Version="2.16.6"/>
-    <PackageReference Include="FsUnit" Version="6.0.0"/>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0"/>
-    <PackageReference Include="NUnit" Version="4.1.0"/>
-    <PackageReference Include="NUnit3TestAdapter" Version="4.5.0"/>
+    <PackageReference Include="ApiSurface" Version="5.0.1" />
+    <PackageReference Include="FsCheck" Version="3.3.1" />
+    <PackageReference Include="FsUnit" Version="7.1.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
+    <PackageReference Include="NUnit" Version="4.3.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="5.0.0" />
+    <PackageReference Include="WoofWare.Expect" Version="0.8.2" />
  </ItemGroup>

  <ItemGroup>
-    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj"/>
-    <ProjectReference Include="..\ConsumePlugin\ConsumePlugin.fsproj"/>
+    <ProjectReference Include="..\WoofWare.Myriad.Plugins\WoofWare.Myriad.Plugins.fsproj" />
+    <ProjectReference Include="..\ConsumePlugin\ConsumePlugin.fsproj" />
  </ItemGroup>

 </Project>
--- a/WoofWare.Myriad.Plugins/ArgParserGenerator.fs
+++ b/WoofWare.Myriad.Plugins/ArgParserGenerator.fs
--- a/WoofWare.Myriad.Plugins/AssemblyInfo.fs
+++ b/WoofWare.Myriad.Plugins/AssemblyInfo.fs
@@ -0,0 +1,6 @@
+module internal WoofWare.Myriad.Plugins.AssemblyInfo
+
+open System.Runtime.CompilerServices
+
+[<assembly : InternalsVisibleTo("WoofWare.Myriad.Plugins.Test")>]
+do ()
--- a/WoofWare.Myriad.Plugins/AstHelper.fs
+++ b/WoofWare.Myriad.Plugins/AstHelper.fs
@@ -1,76 +1,8 @@
 namespace WoofWare.Myriad.Plugins

-open System.IO
 open Fantomas.FCS.Syntax
-open Fantomas.FCS.SyntaxTrivia
 open Fantomas.FCS.Text.Range
-open Fantomas.FCS.Xml
-open Myriad.Core.AstExtensions
-
-type internal ParameterInfo =
-    {
-        Attributes : SynAttribute list
-        IsOptional : bool
-        Id : Ident option
-        Type : SynType
-    }
-
-type internal TupledArg =
-    {
-        HasParen : bool
-        Args : ParameterInfo list
-    }
-
-type internal MemberInfo =
-    {
-        ReturnType : SynType
-        Accessibility : SynAccess option
-        /// Each element of this list is a list of args in a tuple, or just one arg if not a tuple.
-        Args : TupledArg list
-        Identifier : Ident
-        Attributes : SynAttribute list
-        XmlDoc : PreXmlDoc option
-        IsInline : bool
-        IsMutable : bool
-    }
-
-[<RequireQualifiedAccess>]
-type internal PropertyAccessors =
-    | Get
-    | Set
-    | GetSet
-
-type internal PropertyInfo =
-    {
-        Type : SynType
-        Accessibility : SynAccess option
-        Attributes : SynAttribute list
-        XmlDoc : PreXmlDoc option
-        Accessors : PropertyAccessors
-        IsInline : bool
-        Identifier : Ident
-    }
-
-type internal InterfaceType =
-    {
-        Attributes : SynAttribute list
-        Name : LongIdent
-        Inherits : SynType list
-        Members : MemberInfo list
-        Properties : PropertyInfo list
-        Generics : SynTyparDecls option
-        Accessibility : SynAccess option
-    }
-
-type internal RecordType =
-    {
-        Name : Ident
-        Fields : SynField seq
-        Members : SynMemberDefns option
-        XmlDoc : PreXmlDoc option
-        Generics : SynTyparDecls option
-        Accessibility : SynAccess option
-    }
+open WoofWare.Whippet.Fantomas

 /// Anything that is part of an ADT.
 /// A record is a product of stuff; this type represents one of those stuffs.
@@ -99,94 +31,23 @@ type internal AdtProduct =
 [<RequireQualifiedAccess>]
 module internal AstHelper =

-    let instantiateRecord (fields : (RecordFieldName * SynExpr option) list) : SynExpr =
-        let fields =
-            fields
-            |> List.map (fun (rfn, synExpr) -> SynExprRecordField (rfn, Some range0, synExpr, None))
-
-        SynExpr.Record (None, None, fields, range0)
+    let isEnum (SynTypeDefn.SynTypeDefn (_, repr, _, _, _, _)) : bool =
+        match repr with
+        | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Enum _, _) -> true
+        | _ -> false

    let defineRecordType (record : RecordType) : SynTypeDefn =
-        let repr =
-            SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (None, Seq.toList record.Fields, range0), range0)
-
        let name =
-            SynComponentInfo.Create (
-                [ record.Name ],
-                ?xmldoc = record.XmlDoc,
-                ?parameters = record.Generics,
-                access = record.Accessibility
-            )
+            SynComponentInfo.create record.Name
+            |> SynComponentInfo.setAccessibility record.TypeAccessibility
+            |> match record.XmlDoc with
+               | None -> id
+               | Some doc -> SynComponentInfo.withDocString doc
+            |> SynComponentInfo.setGenerics record.Generics

-        let trivia : SynTypeDefnTrivia =
-            {
-                LeadingKeyword = SynTypeDefnLeadingKeyword.Type range0
-                EqualsRange = Some range0
-                WithKeyword = Some range0
-            }
-
-        SynTypeDefn (name, repr, defaultArg record.Members SynMemberDefns.Empty, None, range0, trivia)
-
-    let isOptionIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent with
-        | [ i ] when System.String.Equals (i.idText, "option", System.StringComparison.OrdinalIgnoreCase) -> true
-        // TODO: consider Microsoft.FSharp.Option or whatever it is
-        | _ -> false
-
-    let isUnitIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent with
-        | [ i ] when System.String.Equals (i.idText, "unit", System.StringComparison.OrdinalIgnoreCase) -> true
-        | _ -> false
-
-    let isListIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent with
-        | [ i ] when System.String.Equals (i.idText, "list", System.StringComparison.OrdinalIgnoreCase) -> true
-        // TODO: consider FSharpList or whatever it is
-        | _ -> false
-
-    let isArrayIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent with
-        | [ i ] when
-            System.String.Equals (i.idText, "array", System.StringComparison.OrdinalIgnoreCase)
-            || System.String.Equals (i.idText, "[]", System.StringComparison.Ordinal)
-            ->
-            true
-        | _ -> false
-
-    let isResponseIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent |> List.map _.idText with
-        | [ "Response" ]
-        | [ "RestEase" ; "Response" ] -> true
-        | _ -> false
-
-    let isMapIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent |> List.map _.idText with
-        | [ "Map" ] -> true
-        | _ -> false
-
-    let isReadOnlyDictionaryIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent |> List.map _.idText with
-        | [ "IReadOnlyDictionary" ]
-        | [ "Generic" ; "IReadOnlyDictionary" ]
-        | [ "Collections" ; "Generic" ; "IReadOnlyDictionary" ]
-        | [ "System" ; "Collections" ; "Generic" ; "IReadOnlyDictionary" ] -> true
-        | _ -> false
-
-    let isDictionaryIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent |> List.map _.idText with
-        | [ "Dictionary" ]
-        | [ "Generic" ; "Dictionary" ]
-        | [ "Collections" ; "Generic" ; "Dictionary" ]
-        | [ "System" ; "Collections" ; "Generic" ; "Dictionary" ] -> true
-        | _ -> false
-
-    let isIDictionaryIdent (ident : SynLongIdent) : bool =
-        match ident.LongIdent |> List.map _.idText with
-        | [ "IDictionary" ]
-        | [ "Generic" ; "IDictionary" ]
-        | [ "Collections" ; "Generic" ; "IDictionary" ]
-        | [ "System" ; "Collections" ; "Generic" ; "IDictionary" ] -> true
-        | _ -> false
+        SynTypeDefnRepr.recordWithAccess record.ImplAccessibility (Seq.toList record.Fields)
+        |> SynTypeDefn.create name
+        |> SynTypeDefn.withMemberDefns (defaultArg record.Members SynMemberDefns.Empty)

    let rec private extractOpensFromDecl (moduleDecls : SynModuleDecl list) : SynOpenDeclTarget list =
        moduleDecls
@@ -208,12 +69,12 @@ module internal AstHelper =
        | SynType.Paren (inner, _) ->
            let result, _ = convertSigParam inner
            result, true
-        | SynType.LongIdent ident ->
+        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
            {
                Attributes = []
                IsOptional = false
                Id = None
-                Type = SynType.CreateLongIdent ident
+                Type = SynType.createLongIdent ident
            },
            false
        | SynType.SignatureParameter (attrs, opt, id, usedType, _) ->
@@ -231,7 +92,7 @@ module internal AstHelper =
                Attributes = []
                IsOptional = false
                Id = None
-                Type = SynType.Var (typar, range0)
+                Type = SynType.var typar
            },
            false
        | _ -> failwithf "expected SignatureParameter, got: %+A" ty
@@ -260,10 +121,6 @@ module internal AstHelper =
            }
        | _ -> failwithf "Didn't have alternating type-and-star in interface member definition: %+A" tupleType

-    let toFun (inputs : SynType list) (ret : SynType) : SynType =
-        (ret, List.rev inputs)
-        ||> List.fold (fun ty input -> SynType.CreateFun (input, ty))
-
    /// Returns the args (where these are tuple types if curried) in order, and the return type.
    let rec getType (ty : SynType) : (SynType * bool) list * SynType =
        match ty with
@@ -276,7 +133,7 @@ module internal AstHelper =
                | SynType.Paren (argType, _) -> getType argType, true
                | _ -> getType argType, false

-            ((toFun (List.map fst inputArgs) inputRet), hasParen) :: args, ret
+            ((SynType.toFun (List.map fst inputArgs) inputRet), hasParen) :: args, ret
        | _ -> [], ty

    let private parseMember (slotSig : SynValSig) (flags : SynMemberFlags) : Choice<MemberInfo, PropertyInfo> =
@@ -333,7 +190,7 @@ module internal AstHelper =
                                    Attributes = []
                                    IsOptional = false
                                    Id = None
-                                    Type = SynType.CreateLongIdent (SynLongIdent.CreateFromLongIdent ident)
+                                    Type = SynType.createLongIdent ident
                                }
                                |> List.singleton
                        }
@@ -345,7 +202,7 @@ module internal AstHelper =
                                    Attributes = []
                                    IsOptional = false
                                    Id = None
-                                    Type = SynType.Var (typar, range0)
+                                    Type = SynType.var typar
                                }
                                |> List.singleton
                        }
@@ -499,181 +356,3 @@ module internal AstHelper =
                }
            )
        | _ -> failwithf "Failed to get record elements for type that was: %+A" repr
-
-[<AutoOpen>]
-module internal SynTypePatterns =
-    let (|OptionType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ innerType ], _, _, _, _) when AstHelper.isOptionIdent ident ->
-            Some innerType
-        | _ -> None
-
-    let (|UnitType|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident when AstHelper.isUnitIdent ident -> Some ()
-        | _ -> None
-
-    let (|ListType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ innerType ], _, _, _, _) when AstHelper.isListIdent ident ->
-            Some innerType
-        | _ -> None
-
-    let (|ArrayType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ innerType ], _, _, _, _) when AstHelper.isArrayIdent ident ->
-            Some innerType
-        | SynType.Array (1, innerType, _) -> Some innerType
-        | _ -> None
-
-    let (|RestEaseResponseType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ innerType ], _, _, _, _) when AstHelper.isResponseIdent ident ->
-            Some innerType
-        | _ -> None
-
-    let (|DictionaryType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ key ; value ], _, _, _, _) when AstHelper.isDictionaryIdent ident ->
-            Some (key, value)
-        | _ -> None
-
-    let (|IDictionaryType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ key ; value ], _, _, _, _) when AstHelper.isIDictionaryIdent ident ->
-            Some (key, value)
-        | _ -> None
-
-    let (|IReadOnlyDictionaryType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ key ; value ], _, _, _, _) when
-            AstHelper.isReadOnlyDictionaryIdent ident
-            ->
-            Some (key, value)
-        | _ -> None
-
-    let (|MapType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.App (SynType.LongIdent ident, _, [ key ; value ], _, _, _, _) when AstHelper.isMapIdent ident ->
-            Some (key, value)
-        | _ -> None
-
-    /// Returns the string name of the type.
-    let (|PrimitiveType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent with
-            | [ i ] ->
-                [ "string" ; "float" ; "int" ; "bool" ; "char" ]
-                |> List.tryFind (fun s -> s = i.idText)
-            | _ -> None
-        | _ -> None
-
-    let (|String|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent with
-            | [ i ] ->
-                [ "string" ]
-                |> List.tryFind (fun s -> s = i.idText)
-                |> Option.map ignore<string>
-            | _ -> None
-        | _ -> None
-
-    let (|Byte|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent with
-            | [ i ] -> [ "byte" ] |> List.tryFind (fun s -> s = i.idText) |> Option.map ignore<string>
-            | _ -> None
-        | _ -> None
-
-    let (|Guid|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent |> List.map (fun i -> i.idText) with
-            | [ "System" ; "Guid" ]
-            | [ "Guid" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|HttpResponseMessage|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent |> List.map (fun i -> i.idText) with
-            | [ "System" ; "Net" ; "Http" ; "HttpResponseMessage" ]
-            | [ "Net" ; "Http" ; "HttpResponseMessage" ]
-            | [ "Http" ; "HttpResponseMessage" ]
-            | [ "HttpResponseMessage" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|HttpContent|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent |> List.map (fun i -> i.idText) with
-            | [ "System" ; "Net" ; "Http" ; "HttpContent" ]
-            | [ "Net" ; "Http" ; "HttpContent" ]
-            | [ "Http" ; "HttpContent" ]
-            | [ "HttpContent" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|Stream|_|) (fieldType : SynType) : unit option =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent |> List.map (fun i -> i.idText) with
-            | [ "System" ; "IO" ; "Stream" ]
-            | [ "IO" ; "Stream" ]
-            | [ "Stream" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|NumberType|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.LongIdent ident ->
-            match ident.LongIdent with
-            | [ i ] -> [ "string" ; "float" ; "int" ; "bool" ] |> List.tryFind (fun s -> s = i.idText)
-            | _ -> None
-        | _ -> None
-
-    let (|DateOnly|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
-            match ident |> List.map (fun i -> i.idText) with
-            | [ "System" ; "DateOnly" ]
-            | [ "DateOnly" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|DateTime|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
-            match ident |> List.map (fun i -> i.idText) with
-            | [ "System" ; "DateTime" ]
-            | [ "DateTime" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|Uri|_|) (fieldType : SynType) =
-        match fieldType with
-        | SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)) ->
-            match ident |> List.map (fun i -> i.idText) with
-            | [ "System" ; "Uri" ]
-            | [ "Uri" ] -> Some ()
-            | _ -> None
-        | _ -> None
-
-    let (|Task|_|) (fieldType : SynType) : SynType option =
-        match fieldType with
-        | SynType.App (SynType.LongIdent (SynLongIdent.SynLongIdent (ident, _, _)), _, args, _, _, _, _) ->
-            match ident |> List.map (fun i -> i.idText) with
-            | [ "Task" ]
-            | [ "Tasks" ; "Task" ]
-            | [ "Threading" ; "Tasks" ; "Task" ]
-            | [ "System" ; "Threading" ; "Tasks" ; "Task" ] ->
-                match args with
-                | [ arg ] -> Some arg
-                | _ -> failwithf "Expected Task to be applied to exactly one arg, but got: %+A" args
-            | _ -> None
-        | _ -> None
--- a/WoofWare.Myriad.Plugins/CapturingInterfaceMockGenerator.fs
+++ b/WoofWare.Myriad.Plugins/CapturingInterfaceMockGenerator.fs
@@ -0,0 +1,677 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+open Fantomas.FCS.Syntax
+open Fantomas.FCS.Xml
+open WoofWare.Whippet.Fantomas
+
+type internal CapturingInterfaceMockOutputSpec =
+    {
+        IsInternal : bool
+    }
+
+type private CallField =
+    | ArgsObject of Ident * SynTypeDefn * SynTyparDecls option
+    | Original of SynType
+
+[<RequireQualifiedAccess>]
+module internal CapturingInterfaceMockGenerator =
+    open Fantomas.FCS.Text.Range
+
+    [<RequireQualifiedAccess>]
+    type private KnownInheritance = | IDisposable
+
+    /// Expects the input `args` list to have more than one element.
+    let private createTypeForArgs
+        (spec : CapturingInterfaceMockOutputSpec)
+        (memberName : Ident)
+        (generics : SynTyparDecls option)
+        (args : TupledArg list)
+        : Ident * SynTypeDefn
+        =
+        let name = memberName.idText + "Call" |> Ident.create
+
+        let access =
+            if spec.IsInternal then
+                SynAccess.Internal range0
+            else
+                SynAccess.Public range0
+
+        let recordFields =
+            args
+            |> List.mapi (fun i tupledArg ->
+                {
+                    SynFieldData.Ident =
+                        match tupledArg.Args with
+                        | [ arg ] -> arg.Id
+                        | _ -> None
+                        |> Option.defaultValue (Ident.create $"Arg%i{i}")
+                        |> Some
+                    Attrs = []
+                    Type =
+                        tupledArg.Args
+                        |> List.map (fun pi ->
+                            if pi.IsOptional then
+                                pi.Type |> SynType.appPostfix "option"
+                            else
+                                pi.Type
+                        )
+                        |> SynType.tupleNoParen
+                        |> Option.get
+                }
+                |> SynField.make
+            )
+
+        let record =
+            {
+                Name = name
+                Fields = recordFields
+                Members = None
+                XmlDoc = Some (PreXmlDoc.create $"A single call to the %s{memberName.idText} method")
+                Generics = generics
+                TypeAccessibility = Some access
+                ImplAccessibility = None
+                Attributes = []
+            }
+
+        let typeDecl = AstHelper.defineRecordType record
+
+        name, typeDecl
+
+    let private buildType (x : ParameterInfo) : SynType =
+        if x.IsOptional then
+            SynType.appPostfix "option" x.Type
+        else
+            x.Type
+
+    let private constructMemberSinglePlace (tuple : TupledArg) : SynType =
+        tuple.Args
+        |> List.map buildType
+        |> SynType.tupleNoParen
+        |> Option.defaultWith (fun () -> failwith "no-arg functions not supported yet")
+        |> if tuple.HasParen then SynType.paren else id
+
+    let rec private collectGenerics' (ty : SynType) : Ident list =
+        match ty with
+        | SynType.Var (typar = SynTypar (ident = typar)) -> [ typar ]
+        | SynType.HashConstraint (innerType = ty)
+        | SynType.WithGlobalConstraints (typeName = ty)
+        | SynType.Paren (innerType = ty)
+        | SynType.MeasurePower (baseMeasure = ty)
+        | SynType.SignatureParameter (usedType = ty)
+        | SynType.Array (elementType = ty) -> collectGenerics' ty
+        | SynType.StaticConstant _
+        | SynType.StaticConstantNamed _
+        | SynType.StaticConstantExpr _
+        | SynType.FromParseError _
+        | SynType.Anon _
+        | SynType.LongIdent _ -> []
+        | SynType.LongIdentApp (typeArgs = tys)
+        | SynType.App (typeArgs = tys) -> tys |> List.collect collectGenerics'
+        | SynType.Tuple (path = path) ->
+            path
+            |> List.collect (fun seg ->
+                match seg with
+                | SynTupleTypeSegment.Type ty -> collectGenerics' ty
+                | SynTupleTypeSegment.Star _
+                | SynTupleTypeSegment.Slash _ -> []
+            )
+        | SynType.AnonRecd (fields = fields) -> fields |> List.collect (fun (_, ty) -> collectGenerics' ty)
+        | SynType.Fun (argType = t1 ; returnType = t2)
+        | SynType.Or (lhsType = t1 ; rhsType = t2) -> collectGenerics' t1 @ collectGenerics' t2
+
+    let private collectGenerics (ty : SynType) =
+        collectGenerics' ty |> List.distinctBy _.idText
+
+    /// Builds the record field for the mock object, and also if applicable a type representing a single call to
+    /// that object (packaging up the args of the call).
+    let private constructMember (spec : CapturingInterfaceMockOutputSpec) (mem : MemberInfo) : SynField * CallField =
+        let inputType = mem.Args |> List.map constructMemberSinglePlace
+
+        let funcType = SynType.toFun inputType mem.ReturnType
+
+        let field =
+            {
+                Type = funcType
+                Attrs = []
+                Ident = Some mem.Identifier
+            }
+            |> SynField.make
+            |> SynField.withDocString (mem.XmlDoc |> Option.defaultValue PreXmlDoc.Empty)
+
+        let argsType =
+            match mem.Args with
+            | [] -> failwith "expected args in member"
+            | [ ty ] ->
+                ty.Args
+                |> List.map (fun pi ->
+                    if pi.IsOptional then
+                        SynType.appPostfix "option" pi.Type
+                    else
+                        pi.Type
+                )
+                |> SynType.tupleNoParen
+                |> Option.get
+                |> CallField.Original
+            | args ->
+                let genericsUsed =
+                    args
+                    |> List.collect (fun arg -> arg.Args |> List.map _.Type |> List.collect collectGenerics)
+                    |> List.distinctBy _.idText
+
+                let genericsUsed =
+                    match genericsUsed with
+                    | [] -> None
+                    | genericsUsed ->
+                        genericsUsed
+                        |> List.map (fun i ->
+                            SynTyparDecl.SynTyparDecl ([], SynTypar.SynTypar (i, TyparStaticReq.None, false))
+                        )
+                        |> fun l -> SynTyparDecls.PostfixList (l, [], range0)
+                        |> Some
+
+                let name, defn = createTypeForArgs spec mem.Identifier genericsUsed args
+                CallField.ArgsObject (name, defn, genericsUsed)
+
+        field, argsType
+
+    let constructProperty (prop : PropertyInfo) : SynField =
+        {
+            Attrs = []
+            Ident = Some prop.Identifier
+            Type = SynType.toFun [ SynType.unit ] prop.Type
+        }
+        |> SynField.make
+        |> SynField.withDocString (prop.XmlDoc |> Option.defaultValue PreXmlDoc.Empty)
+
+    let createType
+        (spec : CapturingInterfaceMockOutputSpec)
+        (name : string)
+        (interfaceType : InterfaceType)
+        (xmlDoc : PreXmlDoc)
+        : SynModuleDecl option * SynModuleDecl
+        =
+        let fields =
+            interfaceType.Members
+            |> List.map (constructMember spec)
+            |> List.append (
+                interfaceType.Properties
+                |> List.map constructProperty
+                |> List.map (Tuple.withRight (CallField.Original SynType.unit))
+            )
+
+        let inherits =
+            interfaceType.Inherits
+            |> Seq.map (fun ty ->
+                match ty with
+                | SynType.LongIdent (SynLongIdent.SynLongIdent (name, _, _)) ->
+                    match name |> List.map _.idText with
+                    | [] -> failwith "Unexpected empty identifier in inheritance declaration"
+                    | [ "IDisposable" ]
+                    | [ "System" ; "IDisposable" ] -> KnownInheritance.IDisposable
+                    | _ -> failwithf $"Unrecognised inheritance identifier: %+A{name}"
+                | x -> failwithf $"Unrecognised type in inheritance: %+A{x}"
+            )
+            |> Set.ofSeq
+
+        // TODO: for each field, if there are multiple arguments to the member, stamp out a new type to represent them;
+        // then store that type name in this list alongside the field name
+        let fields =
+            fields
+            |> List.map (fun (SynField (idOpt = idOpt) as f, extraType) ->
+                let fieldName =
+                    match idOpt with
+                    | None -> failwith $"unexpectedly got a field with no identifier: %O{f}"
+                    | Some idOpt -> idOpt.idText
+
+                fieldName, (f, extraType)
+            )
+            |> Map.ofList
+
+        let failwithNotImplemented (fieldName : string) =
+            let failString = SynExpr.CreateConst $"Unimplemented mock function: %s{fieldName}"
+
+            SynExpr.createLongIdent [ "System" ; "NotImplementedException" ]
+            |> SynExpr.applyTo failString
+            |> SynExpr.paren
+            |> SynExpr.applyFunction (SynExpr.createIdent "raise")
+            |> SynExpr.createLambda "_"
+
+        let constructorReturnType =
+            match interfaceType.Generics with
+            | None -> SynType.createLongIdent' [ name ]
+            | Some generics ->
+
+            let generics =
+                generics.TyparDecls
+                |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.var typar)
+
+            SynType.app name generics
+
+        let emptyRecordFieldInstantiations =
+            let interfaceExtras =
+                if inherits.Contains KnownInheritance.IDisposable then
+                    let unitFun = SynExpr.createThunk (SynExpr.CreateConst ())
+
+                    [ SynLongIdent.createS "Dispose", unitFun ]
+                else
+                    []
+
+            let originalMembers =
+                fields
+                |> Map.toList
+                |> List.map (fun (fieldName, _) -> SynLongIdent.createS fieldName, failwithNotImplemented fieldName)
+
+            let callsObject =
+                SynLongIdent.createS "Calls",
+                SynExpr.applyFunction
+                    (SynExpr.createLongIdent [ $"%s{name}Calls" ; "Calls" ; "Empty" ])
+                    (SynExpr.CreateConst ())
+
+            callsObject :: interfaceExtras @ originalMembers
+
+        let staticMemberEmpty =
+            SynBinding.basic
+                [ Ident.create "Empty" ]
+                [ SynPat.unit ]
+                (SynExpr.createRecord None emptyRecordFieldInstantiations)
+            |> SynBinding.withXmlDoc (PreXmlDoc.create "An implementation where every non-unit method throws.")
+            |> SynBinding.withReturnAnnotation constructorReturnType
+            |> SynMemberDefn.staticMember
+
+        let recordFields =
+            let extras =
+                if inherits.Contains KnownInheritance.IDisposable then
+                    {
+                        Attrs = []
+                        Ident = Some (Ident.create "Dispose")
+                        Type = SynType.funFromDomain SynType.unit SynType.unit
+                    }
+                    |> SynField.make
+                    |> SynField.withDocString (PreXmlDoc.create "Implementation of IDisposable.Dispose")
+                    |> List.singleton
+                else
+                    []
+
+            let nonExtras =
+                fields |> Map.toSeq |> Seq.map (fun (_, (field, _)) -> field) |> Seq.toList
+
+            let calls =
+                let ty =
+                    match interfaceType.Generics with
+                    | None -> SynType.createLongIdent' [ $"%s{name}Calls" ; "Calls" ]
+                    | Some generics ->
+                        generics.TyparDecls
+                        |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.var typar)
+                        |> SynType.app' (SynType.createLongIdent' [ $"%s{name}Calls" ; "Calls" ])
+
+                {
+                    Attrs = []
+                    Ident = Ident.create "Calls" |> Some
+                    Type = ty
+                }
+                |> SynField.make
+
+            calls :: extras @ nonExtras
+
+        let access =
+            match interfaceType.Accessibility, spec.IsInternal with
+            | Some (SynAccess.Public _), true
+            | None, true -> SynAccess.Internal range0
+            | Some (SynAccess.Public _), false -> SynAccess.Public range0
+            | None, false -> SynAccess.Public range0
+            | Some (SynAccess.Internal _), _ -> SynAccess.Internal range0
+            | Some (SynAccess.Private _), _ -> SynAccess.Private range0
+
+        let accessAtLeastInternal =
+            match access with
+            | SynAccess.Private _ -> SynAccess.Internal range0
+            | access -> access
+
+        let callsObject =
+            let fields' =
+                fields
+                |> Map.toSeq
+                |> Seq.map (fun (fieldName, (_, callType)) ->
+                    match callType with
+                    | CallField.Original ty ->
+                        {
+                            Attrs = []
+                            Ident = Some (fieldName |> Ident.create)
+                            Type = SynType.app "ResizeArray" [ ty ]
+                        }
+                        |> SynField.make
+                    | CallField.ArgsObject (argsObjectName, _, generics) ->
+                        {
+                            Attrs = []
+                            Ident = Some (fieldName |> Ident.create)
+                            Type =
+                                match generics with
+                                | None -> SynType.named argsObjectName.idText
+                                | Some generics ->
+                                    generics.TyparDecls
+                                    |> List.map (fun (SynTyparDecl.SynTyparDecl (_, typar)) -> SynType.var typar)
+                                    |> SynType.app' (SynType.createLongIdent' [ argsObjectName.idText ])
+                                |> List.singleton
+                                |> SynType.app "ResizeArray"
+                        }
+                        |> SynField.make
+                )
+                |> Seq.toList
+
+            let emptyMember =
+                let returnType =
+                    match interfaceType.Generics with
+                    | None -> SynType.named "Calls"
+                    | Some generics ->
+                        let generics =
+                            match generics with
+                            | SynTyparDecls.PostfixList (decls = decls)
+                            | SynTyparDecls.PrefixList (decls = decls) -> decls
+                            | SynTyparDecls.SinglePrefix (decl = decl) -> [ decl ]
+                            |> List.map (fun (SynTyparDecl.SynTyparDecl (_, typar)) -> SynType.var typar)
+
+                        SynType.app "Calls" generics
+
+                fields
+                |> Map.toSeq
+                |> Seq.map (fun (name, _) ->
+                    SynLongIdent.createS name,
+                    SynExpr.applyFunction (SynExpr.createIdent "ResizeArray") (SynExpr.CreateConst ())
+                )
+                |> Seq.toList
+                |> SynExpr.createRecord None
+                |> SynBinding.basic [ Ident.create "Empty" ] [ SynPat.unit ]
+                |> SynBinding.withXmlDoc (PreXmlDoc.create "A fresh calls object which has not yet had any calls made.")
+                |> SynBinding.withReturnAnnotation returnType
+                |> SynMemberDefn.staticMember
+
+            {
+                RecordType.Name = Ident.create "Calls"
+                Fields = fields'
+                Members = Some [ emptyMember ]
+                XmlDoc = PreXmlDoc.create $"All the calls made to a %s{name} mock" |> Some
+                Generics = interfaceType.Generics
+                TypeAccessibility = Some accessAtLeastInternal
+                ImplAccessibility = None
+                Attributes = [ SynAttribute.requireQualifiedAccess ]
+            }
+            |> AstHelper.defineRecordType
+
+        let interfaceMembers =
+            let members =
+                interfaceType.Members
+                |> List.map (fun memberInfo ->
+                    let headArgs =
+                        memberInfo.Args
+                        |> List.mapi (fun i tupledArgs ->
+                            let args =
+                                tupledArgs.Args
+                                |> List.mapi (fun j ty ->
+                                    match ty.Type with
+                                    | UnitType -> SynPat.unit
+                                    | _ -> SynPat.named $"arg_%i{i}_%i{j}"
+                                )
+
+                            match args with
+                            | [] -> failwith "somehow got no args at all"
+                            | [ arg ] -> arg
+                            | args -> SynPat.tuple args
+                            |> fun i -> if tupledArgs.HasParen then SynPat.paren i else i
+                        )
+
+                    let body, addToCalls =
+                        let tupleContents =
+                            memberInfo.Args
+                            |> List.mapi (fun i args ->
+                                args.Args
+                                |> List.mapi (fun j arg ->
+                                    match arg.Type with
+                                    | UnitType -> SynExpr.CreateConst (), arg.Id
+                                    | _ -> SynExpr.createIdent $"arg_%i{i}_%i{j}", arg.Id
+                                )
+                            )
+
+                        let tuples = tupleContents |> List.map (List.map fst >> SynExpr.tuple)
+
+                        match tuples |> List.rev with
+                        | [] -> failwith "expected args but got none"
+                        | last :: rest ->
+
+                        let tuples = (last, rest) ||> List.fold SynExpr.applyTo
+
+                        let body =
+                            tuples
+                            |> SynExpr.applyFunction (
+                                SynExpr.createLongIdent' [ Ident.create "this" ; memberInfo.Identifier ]
+                            )
+
+                        let addToCalls =
+                            match Map.tryFind memberInfo.Identifier.idText fields with
+                            | None ->
+                                failwith
+                                    $"unexpectedly looking up a nonexistent field %s{memberInfo.Identifier.idText}"
+                            | Some (_, result) ->
+                                match result with
+                                | CallField.Original _ -> tuples
+                                | CallField.ArgsObject _ ->
+                                    tupleContents
+                                    |> List.mapi (fun i fields ->
+                                        match fields with
+                                        | [ contents, Some ident ] -> SynLongIdent.create [ ident ], contents
+                                        | [ contents, None ] -> SynLongIdent.createS $"Arg%i{i}", contents
+                                        | _ ->
+                                            SynLongIdent.createS $"Arg%i{i}",
+                                            SynExpr.tupleNoParen (fields |> List.map fst)
+                                    )
+                                    |> SynExpr.createRecord None
+                            |> SynExpr.applyFunction (
+                                SynExpr.createLongIdent [ "this" ; "Calls" ; memberInfo.Identifier.idText ; "Add" ]
+                            )
+                            |> SynExpr.createLambda "_"
+                            |> SynExpr.applyFunction (
+                                SynExpr.createIdent "lock"
+                                |> SynExpr.applyTo (
+                                    SynExpr.createLongIdent [ "this" ; "Calls" ; memberInfo.Identifier.idText ]
+                                )
+                            )
+
+                        body, addToCalls
+
+                    let body = [ addToCalls ; body ] |> SynExpr.sequential
+
+                    SynBinding.basic [ Ident.create "this" ; memberInfo.Identifier ] headArgs body
+                    |> SynMemberDefn.memberImplementation
+                )
+
+            let properties =
+                interfaceType.Properties
+                |> List.map (fun pi ->
+                    SynExpr.createLongIdent' [ Ident.create "this" ; pi.Identifier ]
+                    |> SynExpr.applyTo (SynExpr.CreateConst ())
+                    |> SynBinding.basic [ Ident.create "this" ; pi.Identifier ] []
+                    |> SynMemberDefn.memberImplementation
+                )
+
+            let interfaceName =
+                let baseName = SynType.createLongIdent interfaceType.Name
+
+                match interfaceType.Generics with
+                | None -> baseName
+                | Some generics ->
+                    let generics =
+                        match generics with
+                        | SynTyparDecls.PostfixList (decls, _, _) -> decls
+                        | SynTyparDecls.PrefixList (decls, _) -> decls
+                        | SynTyparDecls.SinglePrefix (decl, _) -> [ decl ]
+                        |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.var typar)
+
+                    SynType.app' baseName generics
+
+            SynMemberDefn.Interface (interfaceName, Some range0, Some (members @ properties), range0)
+
+        let extraInterfaces =
+            inherits
+            |> Seq.map (fun inheritance ->
+                match inheritance with
+                | KnownInheritance.IDisposable ->
+                    let mem =
+                        SynExpr.createLongIdent [ "this" ; "Dispose" ]
+                        |> SynExpr.applyTo (SynExpr.CreateConst ())
+                        |> SynBinding.basic [ Ident.create "this" ; Ident.create "Dispose" ] [ SynPat.unit ]
+                        |> SynBinding.withReturnAnnotation SynType.unit
+                        |> SynMemberDefn.memberImplementation
+
+                    SynMemberDefn.Interface (
+                        SynType.createLongIdent' [ "System" ; "IDisposable" ],
+                        Some range0,
+                        Some [ mem ],
+                        range0
+                    )
+            )
+            |> Seq.toList
+
+        let record =
+            {
+                Name = Ident.create name
+                Fields = recordFields
+                Members = Some ([ staticMemberEmpty ; interfaceMembers ] @ extraInterfaces)
+                XmlDoc = Some xmlDoc
+                Generics = interfaceType.Generics
+                TypeAccessibility = Some access
+                ImplAccessibility = None
+                Attributes = []
+            }
+
+        let typeDecl = AstHelper.defineRecordType record
+
+        let callsModule =
+            let types =
+                fields
+                |> Map.toSeq
+                |> Seq.choose (fun (_, (_, field)) ->
+                    match field with
+                    | CallField.Original _ -> None
+                    | CallField.ArgsObject (_, callType, _) -> Some (SynModuleDecl.Types ([ callType ], range0))
+                )
+                |> Seq.toList
+
+            types @ [ SynModuleDecl.Types ([ callsObject ], range0) ]
+            |> SynModuleDecl.nestedModule (
+                SynComponentInfo.create (Ident.create $"%s{name}Calls")
+                |> SynComponentInfo.withAccessibility accessAtLeastInternal
+                |> SynComponentInfo.addAttributes [ SynAttribute.requireQualifiedAccess ]
+            )
+            |> Some
+
+        (callsModule, SynModuleDecl.Types ([ typeDecl ], range0))
+
+    let createRecord
+        (namespaceId : LongIdent)
+        (opens : SynOpenDeclTarget list)
+        (interfaceType : SynTypeDefn, spec : CapturingInterfaceMockOutputSpec)
+        : SynModuleOrNamespace
+        =
+        let interfaceType = AstHelper.parseInterface interfaceType
+
+        let docString = PreXmlDoc.create "Mock record type for an interface"
+
+        let name =
+            List.last interfaceType.Name
+            |> _.idText
+            |> fun s ->
+                if s.StartsWith 'I' && s.Length > 1 && Char.IsUpper s.[1] then
+                    s.Substring 1
+                else
+                    s
+            |> fun s -> s + "Mock"
+
+        let callsTypes, typeDecl = createType spec name interfaceType docString
+
+        [
+            yield! opens |> List.map SynModuleDecl.openAny
+            match callsTypes with
+            | None -> ()
+            | Some c -> yield c
+            yield typeDecl
+        ]
+        |> SynModuleOrNamespace.createNamespace namespaceId
+
+open Myriad.Core
+
+/// Myriad generator that creates a record which implements the given interface,
+/// but with every field mocked out.
+[<MyriadGenerator("capturing-interface-mock")>]
+type CapturingInterfaceMockGenerator () =
+
+    interface IMyriadGenerator with
+        member _.ValidInputExtensions = [ ".fs" ]
+
+        member _.Generate (context : GeneratorContext) =
+            let targetedTypes =
+                MyriadParamParser.render context.AdditionalParameters
+                |> Map.map (fun _ v -> v.Split '!' |> Array.toList |> List.map DesiredGenerator.Parse)
+
+            let ast, _ =
+                Ast.fromFilename context.InputFilename |> Async.RunSynchronously |> Array.head
+
+            let types = Ast.getTypes ast
+
+            let namespaceAndInterfaces =
+                types
+                |> List.choose (fun (ns, types) ->
+                    types
+                    |> List.choose (fun typeDef ->
+                        match SynTypeDefn.getAttribute typeof<GenerateCapturingMockAttribute>.Name typeDef with
+                        | None ->
+                            let name = SynTypeDefn.getName typeDef |> List.map _.idText |> String.concat "."
+
+                            match Map.tryFind name targetedTypes with
+                            | Some desired ->
+                                desired
+                                |> List.tryPick (fun generator ->
+                                    match generator with
+                                    | DesiredGenerator.CapturingInterfaceMock arg ->
+                                        let spec =
+                                            {
+                                                IsInternal =
+                                                    arg
+                                                    |> Option.defaultValue
+                                                        GenerateCapturingMockAttribute.DefaultIsInternal
+                                            }
+
+                                        Some (typeDef, spec)
+                                    | _ -> None
+                                )
+                            | _ -> None
+
+                        | Some attr ->
+                            let arg =
+                                match SynExpr.stripOptionalParen attr.ArgExpr with
+                                | SynExpr.Const (SynConst.Bool value, _) -> value
+                                | SynExpr.Const (SynConst.Unit, _) -> GenerateCapturingMockAttribute.DefaultIsInternal
+                                | arg ->
+                                    failwith
+                                        $"Unrecognised argument %+A{arg} to [<%s{nameof GenerateCapturingMockAttribute}>]. Literals are not supported. Use `true` or `false` (or unit) only."
+
+                            let spec =
+                                {
+                                    IsInternal = arg
+                                }
+
+                            Some (typeDef, spec)
+                    )
+                    |> function
+                        | [] -> None
+                        | ty -> Some (ns, ty)
+                )
+
+            let opens = AstHelper.extractOpens ast
+
+            let modules =
+                namespaceAndInterfaces
+                |> List.collect (fun (ns, records) ->
+                    records |> List.map (CapturingInterfaceMockGenerator.createRecord ns opens)
+                )
+
+            Output.Ast modules
--- a/WoofWare.Myriad.Plugins/CataGenerator.fs
+++ b/WoofWare.Myriad.Plugins/CataGenerator.fs
--- a/WoofWare.Myriad.Plugins/HttpClientGenerator.fs
+++ b/WoofWare.Myriad.Plugins/HttpClientGenerator.fs
--- a/WoofWare.Myriad.Plugins/HttpMethod.fs
+++ b/WoofWare.Myriad.Plugins/HttpMethod.fs
@@ -0,0 +1,66 @@
+namespace WoofWare.Myriad.Plugins
+
+open System
+
+/// An HTTP method. This is System.Net.Http.HttpMethod, but
+/// a proper discriminated union.
+type HttpMethod =
+    /// HTTP Get
+    | Get
+    /// HTTP Post
+    | Post
+    /// HTTP Delete
+    | Delete
+    /// HTTP Patch
+    | Patch
+    /// HTTP Options
+    | Options
+    /// HTTP Head
+    | Head
+    /// HTTP Put
+    | Put
+    /// HTTP Trace
+    | Trace
+
+    /// Convert to the standard library's enum type.
+    member this.ToDotNet () : System.Net.Http.HttpMethod =
+        match this with
+        | HttpMethod.Get -> System.Net.Http.HttpMethod.Get
+        | HttpMethod.Post -> System.Net.Http.HttpMethod.Post
+        | HttpMethod.Delete -> System.Net.Http.HttpMethod.Delete
+        | HttpMethod.Patch -> System.Net.Http.HttpMethod.Patch
+        | HttpMethod.Options -> System.Net.Http.HttpMethod.Options
+        | HttpMethod.Head -> System.Net.Http.HttpMethod.Head
+        | HttpMethod.Put -> System.Net.Http.HttpMethod.Put
+        | HttpMethod.Trace -> System.Net.Http.HttpMethod.Trace
+
+    /// Human-readable string representation.
+    override this.ToString () : string =
+        match this with
+        | HttpMethod.Get -> "Get"
+        | HttpMethod.Post -> "Post"
+        | HttpMethod.Delete -> "Delete"
+        | HttpMethod.Patch -> "Patch"
+        | HttpMethod.Options -> "Options"
+        | HttpMethod.Head -> "Head"
+        | HttpMethod.Put -> "Put"
+        | HttpMethod.Trace -> "Trace"
+
+    /// Throws on invalid inputs.
+    static member Parse (s : string) : HttpMethod =
+        if String.Equals (s, "get", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Get
+        elif String.Equals (s, "post", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Post
+        elif String.Equals (s, "patch", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Patch
+        elif String.Equals (s, "delete", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Delete
+        elif String.Equals (s, "head", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Head
+        elif String.Equals (s, "options", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Options
+        elif String.Equals (s, "put", StringComparison.OrdinalIgnoreCase) then
+            HttpMethod.Put
+        else
+            failwith $"Unrecognised method: %s{s}"
--- a/WoofWare.Myriad.Plugins/Ident.fs
+++ b/WoofWare.Myriad.Plugins/Ident.fs
@@ -1,14 +0,0 @@
-namespace WoofWare.Myriad.Plugins
-
-open System
-open System.Text
-open Fantomas.FCS.Syntax
-open Myriad.Core
-
-[<RequireQualifiedAccess>]
-module internal Ident =
-    let lowerFirstLetter (x : Ident) : Ident =
-        let result = StringBuilder x.idText.Length
-        result.Append (Char.ToLowerInvariant x.idText.[0]) |> ignore
-        result.Append x.idText.[1..] |> ignore
-        Ident.Create ((result : StringBuilder).ToString ())
--- a/WoofWare.Myriad.Plugins/InterfaceMockGenerator.fs
+++ b/WoofWare.Myriad.Plugins/InterfaceMockGenerator.fs
@@ -2,9 +2,8 @@ namespace WoofWare.Myriad.Plugins

 open System
 open Fantomas.FCS.Syntax
-open Fantomas.FCS.SyntaxTrivia
 open Fantomas.FCS.Xml
-open Myriad.Core
+open WoofWare.Whippet.Fantomas

 type internal GenerateMockOutputSpec =
    {
@@ -14,7 +13,6 @@ type internal GenerateMockOutputSpec =
 [<RequireQualifiedAccess>]
 module internal InterfaceMockGenerator =
    open Fantomas.FCS.Text.Range
-    open Myriad.Core.Ast

    let private getName (SynField (_, _, id, _, _, _, _, _, _)) =
        match id with
@@ -46,116 +44,67 @@ module internal InterfaceMockGenerator =
            )
            |> Set.ofSeq

-        let synValData =
-            {
-                SynMemberFlags.IsInstance = false
-                SynMemberFlags.IsDispatchSlot = false
-                SynMemberFlags.IsOverrideOrExplicitImpl = false
-                SynMemberFlags.IsFinal = false
-                SynMemberFlags.GetterOrSetterIsCompilerGenerated = false
-                SynMemberFlags.MemberKind = SynMemberKind.Member
-            }
+        let failwithFun (SynField (_, _, idOpt, _, _, _, _, _, _)) =
+            let failString =
+                match idOpt with
+                | None -> SynExpr.CreateConst "Unimplemented mock function"
+                | Some ident -> SynExpr.CreateConst $"Unimplemented mock function: %s{ident.idText}"

-        let failwithFun =
-            SynExpr.createLambda
-                "x"
-                (SynExpr.CreateApp (
-                    SynExpr.CreateIdentString "raise",
-                    SynExpr.CreateParen (
-                        SynExpr.CreateApp (
-                            SynExpr.CreateLongIdent (SynLongIdent.Create [ "System" ; "NotImplementedException" ]),
-                            SynExpr.CreateConstString "Unimplemented mock function"
-                        )
-                    )
-                ))
-
-        let constructorIdent =
-            let generics =
-                interfaceType.Generics
-                |> Option.map (fun generics -> SynValTyparDecls (Some generics, false))
-
-            SynPat.LongIdent (
-                SynLongIdent.CreateString "Empty",
-                None,
-                None, // no generics on the "Empty", only on the return type
-                SynArgPats.Pats (
-                    if generics.IsNone then
-                        []
-                    else
-                        [ SynPat.CreateParen (SynPat.CreateConst SynConst.Unit) ]
-                ),
-                None,
-                range0
-            )
+            SynExpr.createLongIdent [ "System" ; "NotImplementedException" ]
+            |> SynExpr.applyTo failString
+            |> SynExpr.paren
+            |> SynExpr.applyFunction (SynExpr.createIdent "raise")
+            |> SynExpr.createLambda "_"

        let constructorReturnType =
            match interfaceType.Generics with
-            | None -> SynType.CreateLongIdent name
+            | None -> SynType.createLongIdent' [ name ]
            | Some generics ->
-                let generics =
-                    generics.TyparDecls
-                    |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.Var (typar, range0))

-                SynType.App (
-                    SynType.CreateLongIdent name,
-                    Some range0,
-                    generics,
-                    List.replicate (generics.Length - 1) range0,
-                    Some range0,
-                    false,
-                    range0
-                )
-            |> SynBindingReturnInfo.Create
+            let generics =
+                generics.TyparDecls
+                |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.var typar)
+
+            SynType.app name generics

        let constructorFields =
            let extras =
                if inherits.Contains KnownInheritance.IDisposable then
-                    let unitFun = SynExpr.createLambda "_" SynExpr.CreateUnit
+                    let unitFun = SynExpr.createThunk (SynExpr.CreateConst ())

-                    [
-                        (SynLongIdent.CreateFromLongIdent [ Ident.Create "Dispose" ], true), Some unitFun
-                    ]
+                    [ SynLongIdent.createS "Dispose", unitFun ]
                else
                    []

            let nonExtras =
                fields
-                |> List.map (fun field -> (SynLongIdent.CreateFromLongIdent [ getName field ], true), Some failwithFun)
+                |> List.map (fun field -> SynLongIdent.createI (getName field), failwithFun field)

            extras @ nonExtras

        let constructor =
-            SynMemberDefn.Member (
-                SynBinding.SynBinding (
-                    None,
-                    SynBindingKind.Normal,
-                    false,
-                    false,
-                    [],
-                    PreXmlDoc.Create " An implementation where every method throws.",
-                    SynValData.SynValData (Some synValData, SynValInfo.Empty, None),
-                    constructorIdent,
-                    Some constructorReturnType,
-                    AstHelper.instantiateRecord constructorFields,
-                    range0,
-                    DebugPointAtBinding.Yes range0,
-                    { SynExpr.synBindingTriviaZero true with
-                        LeadingKeyword = SynLeadingKeyword.StaticMember (range0, range0)
-                    }
-                ),
-                range0
-            )
+            SynBinding.basic
+                [ Ident.create "Empty" ]
+                (if interfaceType.Generics.IsNone then
+                     []
+                 else
+                     [ SynPat.unit ])
+                (SynExpr.createRecord None constructorFields)
+            |> SynBinding.withXmlDoc (PreXmlDoc.create "An implementation where every method throws.")
+            |> SynBinding.withReturnAnnotation constructorReturnType
+            |> SynMemberDefn.staticMember

        let fields =
            let extras =
                if inherits.Contains KnownInheritance.IDisposable then
-                    [
-                        SynField.Create (
-                            SynType.CreateFun (SynType.CreateUnit, SynType.CreateUnit),
-                            Ident.Create "Dispose",
-                            xmldoc = PreXmlDoc.Create " Implementation of IDisposable.Dispose"
-                        )
-                    ]
+                    {
+                        Attrs = []
+                        Ident = Some (Ident.create "Dispose")
+                        Type = SynType.funFromDomain SynType.unit SynType.unit
+                    }
+                    |> SynField.make
+                    |> SynField.withDocString (PreXmlDoc.create "Implementation of IDisposable.Dispose")
+                    |> List.singleton
                else
                    []

@@ -165,47 +114,6 @@ module internal InterfaceMockGenerator =
            let members =
                interfaceType.Members
                |> List.map (fun memberInfo ->
-
-                    let synValData =
-                        SynValData.SynValData (
-                            Some
-                                {
-                                    IsInstance = true
-                                    IsDispatchSlot = false
-                                    IsOverrideOrExplicitImpl = true
-                                    IsFinal = false
-                                    GetterOrSetterIsCompilerGenerated = false
-                                    MemberKind = SynMemberKind.Member
-                                },
-                            valInfo =
-                                SynValInfo.SynValInfo (
-                                    curriedArgInfos =
-                                        [
-                                            yield
-                                                [
-                                                    SynArgInfo.SynArgInfo (
-                                                        attributes = [],
-                                                        optional = false,
-                                                        ident = None
-                                                    )
-                                                ]
-                                            yield!
-                                                memberInfo.Args
-                                                |> List.mapi (fun i arg ->
-                                                    arg.Args
-                                                    |> List.mapi (fun j arg ->
-                                                        match arg.Type with
-                                                        | UnitType -> SynArgInfo.SynArgInfo ([], false, None)
-                                                        | _ -> SynArgInfo.CreateIdString $"arg_%i{i}_%i{j}"
-                                                    )
-                                                )
-                                        ],
-                                    returnInfo =
-                                        SynArgInfo.SynArgInfo (attributes = [], optional = false, ident = None)
-                                ),
-                            thisIdOpt = None
-                        )
-
                    let headArgs =
                        memberInfo.Args
                        |> List.mapi (fun i tupledArgs ->
@@ -213,27 +121,15 @@ module internal InterfaceMockGenerator =
                                tupledArgs.Args
                                |> List.mapi (fun j ty ->
                                    match ty.Type with
-                                    | UnitType -> SynPat.Const (SynConst.Unit, range0)
-                                    | _ -> SynPat.CreateNamed (Ident.Create $"arg_%i{i}_%i{j}")
+                                    | UnitType -> SynPat.unit
+                                    | _ -> SynPat.named $"arg_%i{i}_%i{j}"
                                )

                            match args with
                            | [] -> failwith "somehow got no args at all"
                            | [ arg ] -> arg
-                            | args ->
-                                SynPat.Tuple (false, args, List.replicate (args.Length - 1) range0, range0)
-                                |> SynPat.CreateParen
-                            |> fun i -> if tupledArgs.HasParen then SynPat.Paren (i, range0) else i
-                        )
-
-                    let headPat =
-                        SynPat.LongIdent (
-                            SynLongIdent.CreateFromLongIdent [ Ident.Create "this" ; memberInfo.Identifier ],
-                            None,
-                            None,
-                            SynArgPats.Pats headArgs,
-                            None,
-                            range0
+                            | args -> SynPat.tuple args
+                            |> fun i -> if tupledArgs.HasParen then SynPat.paren i else i
                        )

                    let body =
@@ -243,10 +139,10 @@ module internal InterfaceMockGenerator =
                                args.Args
                                |> List.mapi (fun j arg ->
                                    match arg.Type with
-                                    | UnitType -> SynExpr.CreateConst SynConst.Unit
-                                    | _ -> SynExpr.CreateIdentString $"arg_%i{i}_%i{j}"
+                                    | UnitType -> SynExpr.CreateConst ()
+                                    | _ -> SynExpr.createIdent $"arg_%i{i}_%i{j}"
                                )
-                                |> SynExpr.CreateParenedTuple
+                                |> SynExpr.tuple
                            )

                        match tuples |> List.rev with
@@ -254,42 +150,26 @@ module internal InterfaceMockGenerator =
                        | last :: rest ->

                        (last, rest)
-                        ||> List.fold (fun trail next -> SynExpr.CreateApp (next, trail))
-                        |> fun args ->
-                            SynExpr.CreateApp (
-                                SynExpr.CreateLongIdent (
-                                    SynLongIdent.CreateFromLongIdent [ Ident.Create "this" ; memberInfo.Identifier ]
-                                ),
-                                args
-                            )
+                        ||> List.fold SynExpr.applyTo
+                        |> SynExpr.applyFunction (
+                            SynExpr.createLongIdent' [ Ident.create "this" ; memberInfo.Identifier ]
+                        )

-                    SynMemberDefn.Member (
-                        SynBinding.SynBinding (
-                            None,
-                            SynBindingKind.Normal,
-                            false,
-                            false,
-                            [],
-                            PreXmlDoc.Empty,
-                            synValData,
-                            headPat,
-                            None,
-                            body,
-                            range0,
-                            DebugPointAtBinding.Yes range0,
-                            {
-                                LeadingKeyword = SynLeadingKeyword.Member range0
-                                InlineKeyword = None
-                                EqualsRange = Some range0
-                            }
-                        ),
-                        range0
-                    )
+                    SynBinding.basic [ Ident.create "this" ; memberInfo.Identifier ] headArgs body
+                    |> SynMemberDefn.memberImplementation
+                )
+
+            let properties =
+                interfaceType.Properties
+                |> List.map (fun pi ->
+                    SynExpr.createLongIdent' [ Ident.create "this" ; pi.Identifier ]
+                    |> SynExpr.applyTo (SynExpr.CreateConst ())
+                    |> SynBinding.basic [ Ident.create "this" ; pi.Identifier ] []
+                    |> SynMemberDefn.memberImplementation
                )

            let interfaceName =
-                let baseName =
-                    SynType.CreateLongIdent (SynLongIdent.CreateFromLongIdent interfaceType.Name)
+                let baseName = SynType.createLongIdent interfaceType.Name

                match interfaceType.Generics with
                | None -> baseName
@@ -299,19 +179,11 @@ module internal InterfaceMockGenerator =
                        | SynTyparDecls.PostfixList (decls, _, _) -> decls
                        | SynTyparDecls.PrefixList (decls, _) -> decls
                        | SynTyparDecls.SinglePrefix (decl, _) -> [ decl ]
-                        |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.Var (typar, range0))
+                        |> List.map (fun (SynTyparDecl (_, typar)) -> SynType.var typar)

-                    SynType.App (
-                        baseName,
-                        Some range0,
-                        generics,
-                        List.replicate (generics.Length - 1) range0,
-                        Some range0,
-                        false,
-                        range0
-                    )
+                    SynType.app' baseName generics

-            SynMemberDefn.Interface (interfaceName, Some range0, Some members, range0)
+            SynMemberDefn.Interface (interfaceName, Some range0, Some (members @ properties), range0)

        let access =
            match interfaceType.Accessibility, spec.IsInternal with
@@ -327,83 +199,15 @@ module internal InterfaceMockGenerator =
            |> Seq.map (fun inheritance ->
                match inheritance with
                | KnownInheritance.IDisposable ->
-                    let valData =
-                        SynValData.SynValData (
-                            Some
-                                {
-                                    IsInstance = true
-                                    IsDispatchSlot = false
-                                    IsOverrideOrExplicitImpl = true
-                                    IsFinal = false
-                                    GetterOrSetterIsCompilerGenerated = false
-                                    MemberKind = SynMemberKind.Member
-                                },
-                            valInfo =
-                                SynValInfo.SynValInfo (
-                                    curriedArgInfos =
-                                        [
-                                            yield
-                                                [
-                                                    SynArgInfo.SynArgInfo (
-                                                        attributes = [],
-                                                        optional = false,
-                                                        ident = None
-                                                    )
-                                                ]
-                                        ],
-                                    returnInfo =
-                                        SynArgInfo.SynArgInfo (attributes = [], optional = false, ident = None)
-                                ),
-                            thisIdOpt = None
-                        )
-
-                    let headArgs = [ SynPat.Const (SynConst.Unit, range0) ]
-
-                    let headPat =
-                        SynPat.LongIdent (
-                            SynLongIdent.CreateFromLongIdent [ Ident.Create "this" ; Ident.Create "Dispose" ],
-                            None,
-                            None,
-                            SynArgPats.Pats headArgs,
-                            None,
-                            range0
-                        )
-
-                    let binding =
-                        SynBinding.SynBinding (
-                            None,
-                            SynBindingKind.Normal,
-                            false,
-                            false,
-                            [],
-                            PreXmlDoc.Empty,
-                            valData,
-                            headPat,
-                            Some (
-                                SynBindingReturnInfo.SynBindingReturnInfo (
-                                    SynType.Unit (),
-                                    range0,
-                                    [],
-                                    SynBindingReturnInfoTrivia.Zero
-                                )
-                            ),
-                            SynExpr.CreateApp (
-                                SynExpr.CreateLongIdent (SynLongIdent.Create [ "this" ; "Dispose" ]),
-                                SynExpr.CreateUnit
-                            ),
-                            range0,
-                            DebugPointAtBinding.Yes range0,
-                            {
-                                LeadingKeyword = SynLeadingKeyword.Member range0
-                                InlineKeyword = None
-                                EqualsRange = Some range0
-                            }
-                        )
-
-                    let mem = SynMemberDefn.Member (binding, range0)
+                    let mem =
+                        SynExpr.createLongIdent [ "this" ; "Dispose" ]
+                        |> SynExpr.applyTo (SynExpr.CreateConst ())
+                        |> SynBinding.basic [ Ident.create "this" ; Ident.create "Dispose" ] [ SynPat.unit ]
+                        |> SynBinding.withReturnAnnotation SynType.unit
+                        |> SynMemberDefn.memberImplementation

                    SynMemberDefn.Interface (
-                        SynType.CreateLongIdent (SynLongIdent.Create [ "System" ; "IDisposable" ]),
+                        SynType.createLongIdent' [ "System" ; "IDisposable" ],
                        Some range0,
                        Some [ mem ],
                        range0
@@ -413,12 +217,14 @@ module internal InterfaceMockGenerator =

        let record =
            {
-                Name = Ident.Create name
+                Name = Ident.create name
                Fields = fields
                Members = Some ([ constructor ; interfaceMembers ] @ extraInterfaces)
                XmlDoc = Some xmlDoc
                Generics = interfaceType.Generics
-                Accessibility = Some access
+                TypeAccessibility = Some access
+                ImplAccessibility = None
+                Attributes = []
            }

        let typeDecl = AstHelper.defineRecordType record
@@ -427,36 +233,38 @@ module internal InterfaceMockGenerator =

    let private buildType (x : ParameterInfo) : SynType =
        if x.IsOptional then
-            SynType.App (SynType.CreateLongIdent "option", Some range0, [ x.Type ], [], Some range0, false, range0)
+            SynType.app "option" [ x.Type ]
        else
            x.Type

    let private constructMemberSinglePlace (tuple : TupledArg) : SynType =
-        match tuple.Args |> List.rev |> List.map buildType with
-        | [] -> failwith "no-arg functions not supported yet"
-        | [ x ] -> x
-        | last :: rest ->
-            ([ SynTupleTypeSegment.Type last ], rest)
-            ||> List.fold (fun ty nextArg -> SynTupleTypeSegment.Type nextArg :: SynTupleTypeSegment.Star range0 :: ty)
-            |> fun segs -> SynType.Tuple (false, segs, range0)
-        |> fun ty -> if tuple.HasParen then SynType.Paren (ty, range0) else ty
+        tuple.Args
+        |> List.map buildType
+        |> SynType.tupleNoParen
+        |> Option.defaultWith (fun () -> failwith "no-arg functions not supported yet")
+        |> if tuple.HasParen then SynType.paren else id

    let constructMember (mem : MemberInfo) : SynField =
        let inputType = mem.Args |> List.map constructMemberSinglePlace

-        let funcType = AstHelper.toFun inputType mem.ReturnType
+        let funcType = SynType.toFun inputType mem.ReturnType

-        SynField.SynField (
-            [],
-            false,
-            Some mem.Identifier,
-            funcType,
-            false,
-            mem.XmlDoc |> Option.defaultValue PreXmlDoc.Empty,
-            None,
-            range0,
-            SynFieldTrivia.Zero
-        )
+        {
+            Type = funcType
+            Attrs = []
+            Ident = Some mem.Identifier
+        }
+        |> SynField.make
+        |> SynField.withDocString (mem.XmlDoc |> Option.defaultValue PreXmlDoc.Empty)
+
+    let constructProperty (prop : PropertyInfo) : SynField =
+        {
+            Attrs = []
+            Ident = Some prop.Identifier
+            Type = SynType.toFun [ SynType.unit ] prop.Type
+        }
+        |> SynField.make
+        |> SynField.withDocString (prop.XmlDoc |> Option.defaultValue PreXmlDoc.Empty)

    let createRecord
        (namespaceId : LongIdent)
@@ -465,25 +273,30 @@ module internal InterfaceMockGenerator =
        : SynModuleOrNamespace
        =
        let interfaceType = AstHelper.parseInterface interfaceType
-        let fields = interfaceType.Members |> List.map constructMember
-        let docString = PreXmlDoc.Create " Mock record type for an interface"
+
+        let fields =
+            interfaceType.Members
+            |> List.map constructMember
+            |> List.append (interfaceType.Properties |> List.map constructProperty)
+
+        let docString = PreXmlDoc.create "Mock record type for an interface"

        let name =
            List.last interfaceType.Name
            |> _.idText
            |> fun s ->
                if s.StartsWith 'I' && s.Length > 1 && Char.IsUpper s.[1] then
-                    s.[1..]
+                    s.Substring 1
                else
                    s
            |> fun s -> s + "Mock"

        let typeDecl = createType spec name interfaceType docString fields

-        SynModuleOrNamespace.CreateNamespace (
-            namespaceId,
-            decls = (opens |> List.map SynModuleDecl.CreateOpen) @ [ typeDecl ]
-        )
+        [ yield! opens |> List.map SynModuleDecl.openAny ; yield typeDecl ]
+        |> SynModuleOrNamespace.createNamespace namespaceId
+
+open Myriad.Core

 /// Myriad generator that creates a record which implements the given interface,
 /// but with every field mocked out.
@@ -494,18 +307,42 @@ type InterfaceMockGenerator () =
        member _.ValidInputExtensions = [ ".fs" ]

        member _.Generate (context : GeneratorContext) =
+            let targetedTypes =
+                MyriadParamParser.render context.AdditionalParameters
+                |> Map.map (fun _ v -> v.Split '!' |> Array.toList |> List.map DesiredGenerator.Parse)
+
            let ast, _ =
                Ast.fromFilename context.InputFilename |> Async.RunSynchronously |> Array.head

-            let types = Ast.extractTypeDefn ast
+            let types = Ast.getTypes ast

            let namespaceAndInterfaces =
                types
                |> List.choose (fun (ns, types) ->
                    types
                    |> List.choose (fun typeDef ->
-                        match Ast.getAttribute<GenerateMockAttribute> typeDef with
-                        | None -> None
+                        match SynTypeDefn.getAttribute typeof<GenerateMockAttribute>.Name typeDef with
+                        | None ->
+                            let name = SynTypeDefn.getName typeDef |> List.map _.idText |> String.concat "."
+
+                            match Map.tryFind name targetedTypes with
+                            | Some desired ->
+                                desired
+                                |> List.tryPick (fun generator ->
+                                    match generator with
+                                    | DesiredGenerator.InterfaceMock arg ->
+                                        let spec =
+                                            {
+                                                IsInternal =
+                                                    arg
+                                                    |> Option.defaultValue GenerateMockAttribute.DefaultIsInternal
+                                            }
+
+                                        Some (typeDef, spec)
+                                    | _ -> None
+                                )
+                            | _ -> None
+
                        | Some attr ->
                            let arg =
                                match SynExpr.stripOptionalParen attr.ArgExpr with
--- a/WoofWare.Myriad.Plugins/JsonHelpers.fs
+++ b/WoofWare.Myriad.Plugins/JsonHelpers.fs
@@ -0,0 +1,48 @@
+namespace WoofWare.Myriad.Plugins
+
+open System.Text.Json.Nodes
+
+[<AutoOpen>]
+module internal JsonHelpers =
+    let inline asString (n : JsonNode) (key : string) : string =
+        match n.[key] with
+        | null -> failwith $"Expected node to have a key '%s{key}', but it did not: %s{n.ToJsonString ()}"
+        | s -> s.GetValue<string> ()
+
+    [<RequiresExplicitTypeArguments>]
+    let inline asOpt<'ret> (n : JsonNode) (key : string) : 'ret option =
+        match n.[key] with
+        | null -> None
+        | s -> s.GetValue<'ret> () |> Some
+
+    let inline asObj (n : JsonNode) (key : string) : JsonObject =
+        match n.[key] with
+        | null -> failwith $"Expected node to have a key '%s{key}', but it did not: %s{n.ToJsonString ()}"
+        | o -> o.AsObject ()
+
+    let inline asObjOpt (n : JsonNode) (key : string) : JsonObject option =
+        match n.[key] with
+        | null -> None
+        | o -> o.AsObject () |> Some
+
+    let inline asArr (n : JsonNode) (key : string) : JsonArray =
+        match n.[key] with
+        | null -> failwith $"Expected node to have a key '%s{key}', but it did not: %s{n.ToJsonString ()}"
+        | o -> o.AsArray ()
+
+    let inline asArrOpt (n : JsonNode) (key : string) : JsonArray option =
+        match n.[key] with
+        | null -> None
+        | o -> o.AsArray () |> Some
+
+    [<RequiresExplicitTypeArguments>]
+    let inline asArr'<'v> (n : JsonNode) (key : string) : 'v list =
+        match n.[key] with
+        | null -> failwith $"Expected node to have a key '%s{key}', but it did not: %s{n.ToJsonString ()}"
+        | o -> o.AsArray () |> Seq.map (fun v -> v.GetValue<'v> ()) |> Seq.toList
+
+    [<RequiresExplicitTypeArguments>]
+    let inline asArrOpt'<'v> (n : JsonNode) (key : string) : 'v list option =
+        match n.[key] with
+        | null -> None
+        | o -> o.AsArray () |> Seq.map (fun v -> v.GetValue<'v> ()) |> Seq.toList |> Some
--- a/WoofWare.Myriad.Plugins/JsonParseGenerator.fs
+++ b/WoofWare.Myriad.Plugins/JsonParseGenerator.fs
--- a/WoofWare.Myriad.Plugins/JsonSerializeGenerator.fs
+++ b/WoofWare.Myriad.Plugins/JsonSerializeGenerator.fs
--- a/WoofWare.Myriad.Plugins/List.fs
+++ b/WoofWare.Myriad.Plugins/List.fs
@@ -12,3 +12,12 @@ module private List =
            )

        List.rev xs, List.rev ys
+
+    let allSome<'a> (l : 'a option list) : 'a list option =
+        let rec go acc (l : 'a option list) =
+            match l with
+            | [] -> Some (List.rev acc)
+            | None :: _ -> None
+            | Some head :: tail -> go (head :: acc) tail
+
+        go [] l
--- a/WoofWare.Myriad.Plugins/Measure.fs
+++ b/WoofWare.Myriad.Plugins/Measure.fs
@@ -0,0 +1,24 @@
+namespace WoofWare.Myriad.Plugins
+
+open Fantomas.FCS.Syntax
+open WoofWare.Whippet.Fantomas
+
+[<RequireQualifiedAccess>]
+module internal Measure =
+
+    let getLanguagePrimitivesMeasure (typeName : LongIdent) : SynExpr =
+        match typeName |> List.map _.idText with
+        | [ "System" ; "Single" ] -> [ "LanguagePrimitives" ; "Float32WithMeasure" ]
+        | [ "System" ; "Double" ] -> [ "LanguagePrimitives" ; "FloatWithMeasure" ]
+        | [ "System" ; "Byte" ] -> [ "LanguagePrimitives" ; "ByteWithMeasure" ]
+        | [ "System" ; "SByte" ] -> [ "LanguagePrimitives" ; "SByteWithMeasure" ]
+        | [ "System" ; "Int16" ] -> [ "LanguagePrimitives" ; "Int16WithMeasure" ]
+        | [ "System" ; "Int32" ] -> [ "LanguagePrimitives" ; "Int32WithMeasure" ]
+        | [ "System" ; "Int64" ] -> [ "LanguagePrimitives" ; "Int64WithMeasure" ]
+        | [ "System" ; "UInt16" ] -> [ "LanguagePrimitives" ; "UInt16WithMeasure" ]
+        | [ "System" ; "UInt32" ] -> [ "LanguagePrimitives" ; "UInt32WithMeasure" ]
+        | [ "System" ; "UInt64" ] -> [ "LanguagePrimitives" ; "UInt64WithMeasure" ]
+        | l ->
+            let l = String.concat "." l
+            failwith $"unrecognised type for measure: %s{l}"
+        |> SynExpr.createLongIdent
--- a/WoofWare.Myriad.Plugins/MyriadParamParser.fs
+++ b/WoofWare.Myriad.Plugins/MyriadParamParser.fs
@@ -0,0 +1,42 @@
+namespace WoofWare.Myriad.Plugins
+
+open System.Collections.Generic
+
+[<RequireQualifiedAccess>]
+module internal MyriadParamParser =
+    (*
+      An apparent bug in Myriad's argument parsing means that this:
+
+        <MyriadParams>
+            <Foo>bar</Foo>
+            <Baz>quux</Baz>
+        </MyriadParams>
+
+      leads to this:
+
+        Foo = "bar;Baz=quux"
+
+      I'm not going to put effort into fixing Myriad, though, because I want
+      to build something much more powerful instead.
+    *)
+
+    /// Call this with `context.AdditionalParameters`.
+    let render (pars : IDictionary<string, string>) : Map<string, string> =
+        match pars.Count with
+        | 0 -> Map.empty
+        | 1 ->
+            let (KeyValue (key, value)) = pars |> Seq.exactlyOne
+
+            match value.Split ';' |> Seq.toList with
+            | [] -> failwith "LOGIC ERROR"
+            | value :: rest ->
+                rest
+                |> Seq.map (fun v ->
+                    let split = v.Split '='
+                    split.[0], String.concat "=" split.[1..]
+                )
+                |> Seq.append (Seq.singleton (key, value))
+                |> Map.ofSeq
+        | _ ->
+            // assume the Myriad bug is fixed!
+            pars |> Seq.map (fun (KeyValue (k, v)) -> k, v) |> Map.ofSeq
--- a/WoofWare.Myriad.Plugins/OpenApi3.fs
+++ b/WoofWare.Myriad.Plugins/OpenApi3.fs
--- a/WoofWare.Myriad.Plugins/Parameters.fs
+++ b/WoofWare.Myriad.Plugins/Parameters.fs
@@ -0,0 +1,27 @@
+namespace WoofWare.Myriad.Plugins
+
+type internal DesiredGenerator =
+    | InterfaceMock of isInternal : bool option
+    | CapturingInterfaceMock of isInternal : bool option
+    | JsonParse of extensionMethod : bool option
+    | JsonSerialize of extensionMethod : bool option
+    | HttpClient of extensionMethod : bool option
+
+    static member Parse (s : string) =
+        match s with
+        | "GenerateMock" -> DesiredGenerator.InterfaceMock None
+        | "GenerateMock(true)" -> DesiredGenerator.InterfaceMock (Some true)
+        | "GenerateMock(false)" -> DesiredGenerator.InterfaceMock (Some false)
+        | "GenerateCapturingMock" -> DesiredGenerator.CapturingInterfaceMock None
+        | "GenerateCapturingMock(true)" -> DesiredGenerator.CapturingInterfaceMock (Some true)
+        | "GenerateCapturingMock(false)" -> DesiredGenerator.CapturingInterfaceMock (Some false)
+        | "JsonParse" -> DesiredGenerator.JsonParse None
+        | "JsonParse(true)" -> DesiredGenerator.JsonParse (Some true)
+        | "JsonParse(false)" -> DesiredGenerator.JsonParse (Some false)
+        | "JsonSerialize" -> DesiredGenerator.JsonSerialize None
+        | "JsonSerialize(true)" -> DesiredGenerator.JsonSerialize (Some true)
+        | "JsonSerialize(false)" -> DesiredGenerator.JsonSerialize (Some false)
+        | "HttpClient" -> DesiredGenerator.HttpClient None
+        | "HttpClient(true)" -> DesiredGenerator.HttpClient (Some true)
+        | "HttpClient(false)" -> DesiredGenerator.HttpClient (Some false)
+        | _ -> failwith $"Failed to parse as a generator specification: %s{s}"
--- a/WoofWare.Myriad.Plugins/RemoveOptionsGenerator.fs
+++ b/WoofWare.Myriad.Plugins/RemoveOptionsGenerator.fs
@@ -1,14 +1,13 @@
 namespace WoofWare.Myriad.Plugins

+open System
 open Fantomas.FCS.Syntax
-open Fantomas.FCS.SyntaxTrivia
 open Fantomas.FCS.Xml
-open Myriad.Core
+open WoofWare.Whippet.Fantomas

 [<RequireQualifiedAccess>]
 module internal RemoveOptionsGenerator =
    open Fantomas.FCS.Text.Range
-    open Myriad.Core.Ast

    let private removeOption (s : SynField) : SynField =
        let (SynField.SynField (synAttributeLists,
@@ -39,15 +38,15 @@ module internal RemoveOptionsGenerator =
            trivia
        )

-    // TODO: this option seems a bit odd
    let createType
        (xmlDoc : PreXmlDoc option)
        (accessibility : SynAccess option)
        (generics : SynTyparDecls option)
        (fields : SynField list)
+        : SynModuleDecl
        =
        let fields : SynField list = fields |> List.map removeOption
-        let name = Ident.Create "Short"
+        let name = Ident.create "Short"

        let record =
            {
@@ -56,138 +55,85 @@ module internal RemoveOptionsGenerator =
                Members = None
                XmlDoc = xmlDoc
                Generics = generics
-                Accessibility = accessibility
+                TypeAccessibility = accessibility
+                ImplAccessibility = None
+                Attributes = []
            }

-        let typeDecl = AstHelper.defineRecordType record
+        let typeDecl = RecordType.ToAst record

        SynModuleDecl.Types ([ typeDecl ], range0)

-    let createMaker (withOptionsType : LongIdent) (withoutOptionsType : LongIdent) (fields : SynField list) =
-        let xmlDoc = PreXmlDoc.Create " Remove the optional members of the input."
+    let createMaker (withOptionsType : LongIdent) (withoutOptionsType : Ident) (fields : SynFieldData<Ident> list) =
+        let xmlDoc = PreXmlDoc.create "Remove the optional members of the input."

-        let returnInfo =
-            SynBindingReturnInfo.Create (SynType.LongIdent (SynLongIdent.CreateFromLongIdent withOptionsType))
-
-        let inputArg = Ident.Create "input"
-        let functionName = Ident.Create "shorten"
-
-        let inputVal =
-            SynValData.SynValData (
-                None,
-                SynValInfo.SynValInfo ([ [ SynArgInfo.CreateId functionName ] ], SynArgInfo.Empty),
-                Some inputArg
-            )
+        let inputArg = Ident.create "input"
+        let functionName = Ident.create "shorten"

        let body =
            fields
-            |> List.map (fun (SynField (_, _, id, fieldType, _, _, _, _, _)) ->
-                let id =
-                    match id with
-                    | None -> failwith "Expected record field to have an identifying name"
-                    | Some id -> id
-
+            |> List.map (fun fieldData ->
                let accessor =
-                    SynExpr.LongIdent (false, SynLongIdent ([ inputArg ; id ], [ range0 ], []), None, range0)
+                    SynExpr.LongIdent (
+                        false,
+                        SynLongIdent ([ inputArg ; fieldData.Ident ], [ range0 ], []),
+                        None,
+                        range0
+                    )

                let body =
-                    match fieldType with
+                    match fieldData.Type with
                    | OptionType _ ->
-                        SynExpr.CreateApp (
-                            SynExpr.CreateAppInfix (
-                                SynExpr.LongIdent (
-                                    false,
-                                    SynLongIdent.SynLongIdent (
-                                        [ Ident.Create "op_PipeRight" ],
-                                        [],
-                                        [ Some (IdentTrivia.OriginalNotation "|>") ]
-                                    ),
-                                    None,
-                                    range0
-                                ),
-                                accessor
-                            ),
-                            SynExpr.CreateApp (
-                                SynExpr.CreateLongIdent (SynLongIdent.CreateString "Option.defaultWith"),
-                                SynExpr.CreateLongIdent (
-                                    SynLongIdent.CreateFromLongIdent (
-                                        withoutOptionsType @ [ Ident.Create (sprintf "Default%s" id.idText) ]
-                                    )
-                                )
-                            )
+                        accessor
+                        |> SynExpr.pipeThroughFunction (
+                            SynExpr.applyFunction
+                                (SynExpr.createLongIdent [ "Option" ; "defaultWith" ])
+                                (SynExpr.createLongIdent' (
+                                    [ withoutOptionsType ]
+                                    @ [ Ident.create (sprintf "Default%s" fieldData.Ident.idText) ]
+                                ))
                        )
                    | _ -> accessor

-                (SynLongIdent.CreateFromLongIdent [ id ], true), Some body
+                SynLongIdent.createI fieldData.Ident, body
            )
-            |> AstHelper.instantiateRecord
+            |> SynExpr.createRecord None

-        let pattern =
-            SynPat.LongIdent (
-                SynLongIdent.CreateFromLongIdent [ functionName ],
-                None,
-                None,
-                SynArgPats.Pats
-                    [
-                        SynPat.CreateTyped (
-                            SynPat.CreateNamed inputArg,
-                            SynType.LongIdent (SynLongIdent.CreateFromLongIdent withoutOptionsType)
-                        )
-                        |> SynPat.CreateParen
-                    ],
-                None,
-                range0
-            )
+        SynBinding.basic
+            [ functionName ]
+            [
+                SynPat.named inputArg.idText
+                |> SynPat.annotateType (SynType.LongIdent (SynLongIdent.createI withoutOptionsType))
+            ]
+            body
+        |> SynBinding.withXmlDoc xmlDoc
+        |> SynBinding.withReturnAnnotation (SynType.LongIdent (SynLongIdent.create withOptionsType))
+        |> SynModuleDecl.createLet

-        let binding =
-            SynBinding.Let (
-                isInline = false,
-                isMutable = false,
-                xmldoc = xmlDoc,
-                returnInfo = returnInfo,
-                expr = body,
-                valData = inputVal,
-                pattern = pattern
-            )
+    let createRecordModule (namespaceId : LongIdent) (typeDefn : RecordType) =
+        let fieldData = typeDefn.Fields |> List.map SynField.extractWithIdent

-        SynModuleDecl.CreateLet [ binding ]
+        let decls =
+            [
+                createType typeDefn.XmlDoc typeDefn.TypeAccessibility typeDefn.Generics typeDefn.Fields
+                createMaker [ Ident.create "Short" ] typeDefn.Name fieldData
+            ]

-    let createRecordModule (namespaceId : LongIdent) (typeDefn : SynTypeDefn) =
-        let (SynTypeDefn (synComponentInfo, synTypeDefnRepr, _members, _implicitCtor, _, _)) =
-            typeDefn
+        let xmlDoc =
+            sprintf "Module containing an option-truncated version of the %s type" typeDefn.Name.idText
+            |> PreXmlDoc.create

-        let (SynComponentInfo (_attributes, typeParams, _constraints, recordId, doc, _preferPostfix, _access, _)) =
-            synComponentInfo
+        let info =
+            SynComponentInfo.create typeDefn.Name
+            |> SynComponentInfo.withDocString xmlDoc
+            |> SynComponentInfo.addAttributes [ SynAttribute.compilationRepresentation ]
+            |> SynComponentInfo.addAttributes [ SynAttribute.requireQualifiedAccess ]

-        match synTypeDefnRepr with
-        | SynTypeDefnRepr.Simple (SynTypeDefnSimpleRepr.Record (accessibility, recordFields, _recordRange), _) ->
+        SynModuleDecl.nestedModule info decls
+        |> List.singleton
+        |> SynModuleOrNamespace.createNamespace namespaceId

-            let decls =
-                [
-                    createType (Some doc) accessibility typeParams recordFields
-                    createMaker [ Ident.Create "Short" ] recordId recordFields
-                ]
-
-            let attributes =
-                [
-                    SynAttributeList.Create (SynAttribute.RequireQualifiedAccess ())
-                    SynAttributeList.Create SynAttribute.compilationRepresentation
-                ]
-
-            let xmlDoc =
-                recordId
-                |> Seq.map (fun i -> i.idText)
-                |> String.concat "."
-                |> sprintf " Module containing an option-truncated version of the %s type"
-                |> PreXmlDoc.Create
-
-            let info =
-                SynComponentInfo.Create (recordId, attributes = attributes, xmldoc = xmlDoc)
-
-            let mdl = SynModuleDecl.CreateNestedModule (info, decls)
-
-            SynModuleOrNamespace.CreateNamespace (namespaceId, decls = [ mdl ])
-        | _ -> failwithf "Not a record type"
+open Myriad.Core

 /// Myriad generator that stamps out a record with option types stripped
 /// from the fields at the top level.
@@ -201,24 +147,31 @@ type RemoveOptionsGenerator () =
            let ast, _ =
                Ast.fromFilename context.InputFilename |> Async.RunSynchronously |> Array.head

-            let records = Ast.extractRecords ast
+            let records = Ast.getRecords ast

            let namespaceAndRecords =
                records
-                |> List.choose (fun (ns, types) ->
-                    match types |> List.filter Ast.hasAttribute<RemoveOptionsAttribute> with
-                    | [] -> None
-                    | types -> Some (ns, types)
+                |> List.collect (fun (ns, ty) ->
+                    ty
+                    |> List.filter (fun record ->
+                        record.Attributes
+                        |> List.exists (fun attr ->
+                            attr.TypeName.LongIdent
+                            |> List.last
+                            |> _.idText
+                            |> fun s ->
+                                if s.EndsWith ("Attribute", StringComparison.Ordinal) then
+                                    s
+                                else
+                                    $"%s{s}Attribute"
+                            |> (=) typeof<RemoveOptionsAttribute>.Name
+                        )
+                    )
+                    |> List.map (fun ty -> ns, ty)
                )

            let modules =
                namespaceAndRecords
-                |> List.collect (fun (ns, records) ->
-                    records
-                    |> List.map (fun record ->
-                        let recordModule = RemoveOptionsGenerator.createRecordModule ns record
-                        recordModule
-                    )
-                )
+                |> List.map (fun (ns, record) -> RemoveOptionsGenerator.createRecordModule ns record)

            Output.Ast modules
--- a/WoofWare.Myriad.Plugins/SurfaceBaseline.txt
+++ b/WoofWare.Myriad.Plugins/SurfaceBaseline.txt
@@ -1,7 +1,58 @@
+WoofWare.Myriad.Plugins.ArgParserGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
+WoofWare.Myriad.Plugins.ArgParserGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.CapturingInterfaceMockGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
+WoofWare.Myriad.Plugins.CapturingInterfaceMockGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.CreateCatamorphismGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.CreateCatamorphismGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.HttpClientGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.HttpClientGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.HttpMethod inherit obj, implements WoofWare.Myriad.Plugins.HttpMethod System.IEquatable, System.Collections.IStructuralEquatable, WoofWare.Myriad.Plugins.HttpMethod System.IComparable, System.IComparable, System.Collections.IStructuralComparable - union type with 8 cases
+WoofWare.Myriad.Plugins.HttpMethod+Tags inherit obj
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Delete [static field]: int = 2
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Get [static field]: int = 0
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Head [static field]: int = 5
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Options [static field]: int = 4
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Patch [static field]: int = 3
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Post [static field]: int = 1
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Put [static field]: int = 6
+WoofWare.Myriad.Plugins.HttpMethod+Tags.Trace [static field]: int = 7
+WoofWare.Myriad.Plugins.HttpMethod.Delete [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Equals [method]: (WoofWare.Myriad.Plugins.HttpMethod, System.Collections.IEqualityComparer) -> bool
+WoofWare.Myriad.Plugins.HttpMethod.Get [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Delete [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Get [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Head [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_IsDelete [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsGet [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsHead [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsOptions [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsPatch [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsPost [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsPut [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_IsTrace [method]: unit -> bool
+WoofWare.Myriad.Plugins.HttpMethod.get_Options [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Patch [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Post [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Put [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.get_Tag [method]: unit -> int
+WoofWare.Myriad.Plugins.HttpMethod.get_Trace [static method]: unit -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Head [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.IsDelete [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsGet [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsHead [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsOptions [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsPatch [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsPost [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsPut [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.IsTrace [property]: [read-only] bool
+WoofWare.Myriad.Plugins.HttpMethod.Options [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Parse [static method]: string -> WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Patch [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Post [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Put [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Tag [property]: [read-only] int
+WoofWare.Myriad.Plugins.HttpMethod.ToDotNet [method]: unit -> System.Net.Http.HttpMethod
+WoofWare.Myriad.Plugins.HttpMethod.Trace [static property]: [read-only] WoofWare.Myriad.Plugins.HttpMethod
 WoofWare.Myriad.Plugins.InterfaceMockGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.InterfaceMockGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonParseGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
@@ -9,4 +60,6 @@ WoofWare.Myriad.Plugins.JsonParseGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.JsonSerializeGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
 WoofWare.Myriad.Plugins.JsonSerializeGenerator..ctor [constructor]: unit
 WoofWare.Myriad.Plugins.RemoveOptionsGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
-WoofWare.Myriad.Plugins.RemoveOptionsGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.RemoveOptionsGenerator..ctor [constructor]: unit
+WoofWare.Myriad.Plugins.SwaggerClientGenerator inherit obj, implements Myriad.Core.IMyriadGenerator
+WoofWare.Myriad.Plugins.SwaggerClientGenerator..ctor [constructor]: unit
--- a/WoofWare.Myriad.Plugins/SwaggerClientGenerator.fs
+++ b/WoofWare.Myriad.Plugins/SwaggerClientGenerator.fs
@@ -0,0 +1,735 @@
+namespace WoofWare.Myriad.Plugins
+
+open System.Collections.Generic
+open System.Threading
+open Fantomas.FCS.Syntax
+open Fantomas.FCS.Xml
+open Fantomas.FCS.Text.Range
+open WoofWare.Whippet.Fantomas
+
+type internal SwaggerClientConfig =
+    {
+        /// Additionally create a mock with `InterfaceMockGenerator`, with the given boolean arg.
+        /// (`None` means "no mock".)
+        CreateMock : bool option
+        ClassName : string
+    }
+
+type internal Produces =
+    // TODO: this will cope with decoding JSON, plain text, etc
+    | Produces of string
+    | OctetStream
+
+type internal Endpoint =
+    {
+        DocString : PreXmlDoc
+        Produces : Produces
+        ReturnType : SwaggerV2.Definition
+        Method : WoofWare.Myriad.Plugins.HttpMethod
+        Operation : SwaggerV2.OperationId
+        Parameters : SwaggerV2.SwaggerParameter list
+        Endpoint : string
+    }
+
+type internal TypeEntry =
+    {
+        /// If we had to define a type for this, here it is.
+        FSharpDefinition : SynTypeDefn option
+        /// SynType you use in e.g. a type annotation to refer to this type in F# code.
+        Signature : SynType
+    }
+
+type internal Types =
+    {
+        ByHandle : IReadOnlyDictionary<string, TypeEntry>
+        ByDefinition : IReadOnlyDictionary<SwaggerV2.Definition, TypeEntry>
+    }
+
+[<RequireQualifiedAccess>]
+module internal SwaggerClientGenerator =
+
+    let internal log (_ : string) = ()
+
+    let renderType (types : Types) (defn : SwaggerV2.Definition) : SynType option =
+        match types.ByDefinition.TryGetValue defn with
+        | true, v -> Some v.Signature
+        | false, _ ->
+
+        match defn with
+        | SwaggerV2.Definition.Handle h ->
+            match types.ByHandle.TryGetValue h with
+            | false, _ -> None
+            | true, v -> Some v.Signature
+        | SwaggerV2.Definition.Object _ -> failwith "should not hit"
+        | SwaggerV2.Definition.Array _ -> failwith "should not hit"
+        | SwaggerV2.Definition.Unspecified -> failwith "should not hit"
+        | SwaggerV2.Definition.String -> SynType.string |> Some
+        | SwaggerV2.Definition.Boolean -> SynType.bool |> Some
+        | SwaggerV2.Definition.Integer _ -> SynType.int |> Some
+        | SwaggerV2.Definition.File -> SynType.createLongIdent' [ "System" ; "IO" ; "Stream" ] |> Some
+
+    /// Returns None if we lacked the information required to do this.
+    /// bigCache is a map of e.g. {"securityDefinition": {Defn : F# type}}.
+    let rec defnToType
+        (anonymousTypeCount : int ref)
+        (handlesMap : Dictionary<string, TypeEntry>)
+        (bigCache : Dictionary<string, Dictionary<SwaggerV2.Definition, TypeEntry>>)
+        (thisKey : string)
+        (typeName : string option)
+        (d : SwaggerV2.Definition)
+        : TypeEntry option
+        =
+        let cache =
+            match bigCache.TryGetValue thisKey with
+            | false, _ ->
+                let d = Dictionary ()
+                bigCache.Add (thisKey, d)
+                d
+            | true, d -> d
+
+        let handleKey =
+            match typeName with
+            | None -> None
+            | Some typeName -> $"#/%s{thisKey}/%s{typeName}" |> Some
+
+        match handleKey with
+        | Some hk when handlesMap.ContainsKey hk ->
+            let result = handlesMap.[hk]
+            cache.[d] <- result
+            Some result
+
+        | _ ->
+
+        match cache.TryGetValue d with
+        | true, v ->
+            match handleKey with
+            | None -> ()
+            | Some key -> handlesMap.Add (key, v)
+
+            Some v
+        | false, _ ->
+
+        let result =
+            match d with
+            | SwaggerV2.Definition.Object obj ->
+                let requiredFields = obj.Required |> Option.defaultValue [] |> Set.ofList
+
+                let namedProperties =
+                    obj.Properties
+                    |> Option.map Seq.cast
+                    |> Option.defaultValue Seq.empty
+                    |> Seq.map (fun (KeyValue (fieldName, defn)) ->
+                        // TODO this is a horrible hack and is incomplete, e.g. if we contain an array of ourself
+                        // Special case for when this is a reference to this very type
+                        let isOurself =
+                            match defn with
+                            | SwaggerV2.Definition.Handle h ->
+                                match h.Split '/' with
+                                | [| "#" ; location ; ty |] when location = thisKey && Some ty = typeName ->
+                                    SynType.named ty |> Some
+                                | _ -> None
+                            | _ -> None
+
+                        let jsonPropertyName =
+                            SynExpr.CreateConst (fieldName : string)
+                            |> SynAttribute.create (
+                                SynLongIdent.createS'
+                                    [ "System" ; "Text" ; "Json" ; "Serialization" ; "JsonPropertyName" ]
+                            )
+
+                        match isOurself with
+                        | Some alreadyDone ->
+                            let ty =
+                                if Set.contains fieldName requiredFields then
+                                    alreadyDone
+                                else
+                                    SynType.option alreadyDone
+
+                            {
+                                Attrs = [ jsonPropertyName ]
+                                Type = ty
+                                Ident = Some (Ident.createSanitisedTypeName fieldName)
+                            }
+                            |> SynField.make
+                            |> Some
+                        | None ->
+
+                        let defn' = defnToType anonymousTypeCount handlesMap bigCache thisKey None defn
+
+                        match defn' with
+                        | None -> None
+                        | Some defn' ->
+                            let ty =
+                                if Set.contains fieldName requiredFields then
+                                    defn'.Signature
+                                else
+                                    defn'.Signature |> SynType.option
+
+                            {
+                                Attrs = [ jsonPropertyName ]
+                                Ident = Ident.createSanitisedTypeName fieldName |> Some
+                                Type = ty
+                            }
+                            |> SynField.make
+                            |> Some
+                    )
+                    |> Seq.toList
+
+                let additionalProperties =
+                    match obj.AdditionalProperties with
+                    | None ->
+                        {
+                            Attrs =
+                                [
+                                    SynAttribute.create
+                                        (SynLongIdent.createS'
+                                            [ "System" ; "Text" ; "Json" ; "Serialization" ; "JsonExtensionData" ])
+                                        (SynExpr.CreateConst ())
+                                ]
+                            Ident = Ident.create "AdditionalProperties" |> Some
+                            Type =
+                                SynType.app'
+                                    (SynType.createLongIdent' [ "System" ; "Collections" ; "Generic" ; "Dictionary" ])
+                                    [
+                                        SynType.string
+                                        SynType.createLongIdent' [ "System" ; "Text" ; "Json" ; "Nodes" ; "JsonNode" ]
+                                    ]
+                        }
+                        |> SynField.make
+                        |> List.singleton
+                        |> Some
+                    | Some SwaggerV2.AdditionalProperties.Never -> Some []
+                    | Some (SwaggerV2.AdditionalProperties.Constrained defn) ->
+                        let defn' = defnToType anonymousTypeCount handlesMap bigCache thisKey None defn
+
+                        match defn' with
+                        | None -> None
+                        | Some defn' ->
+                            {
+                                Attrs =
+                                    [
+                                        SynAttribute.create
+                                            (SynLongIdent.createS'
+                                                [ "System" ; "Text" ; "Json" ; "Serialization" ; "JsonExtensionData" ])
+                                            (SynExpr.CreateConst ())
+                                    ]
+                                Ident = Ident.create "AdditionalProperties" |> Some
+                                Type =
+                                    SynType.app'
+                                        (SynType.createLongIdent'
+                                            [ "System" ; "Collections" ; "Generic" ; "Dictionary" ])
+                                        [ SynType.string ; defn'.Signature ]
+                            }
+                            |> SynField.make
+                            |> List.singleton
+                            |> Some
+
+                match additionalProperties with
+                | None -> None
+                | Some additionalProperties ->
+
+                match List.allSome namedProperties with
+                | None -> None
+                | Some namedProperties ->
+
+                let fSharpTypeName =
+                    match typeName with
+                    | None -> $"Type%i{Interlocked.Increment anonymousTypeCount}"
+                    | Some typeName -> typeName
+
+                let properties = additionalProperties @ namedProperties
+
+                let properties =
+                    if properties.IsEmpty then
+                        // sigh, they didn't give us any properties at all; let's make one up
+                        {
+                            Attrs = []
+                            Ident = Some (Ident.create "_SchemaUnspecified")
+                            Type = SynType.obj
+                        }
+                        |> SynField.make
+                        |> List.singleton
+                    else
+                        properties
+
+                let defn =
+                    let sci =
+                        SynComponentInfo.create (Ident.createSanitisedTypeName fSharpTypeName)
+                        |> SynComponentInfo.addAttributes
+                            [
+                                SynAttribute.create (SynLongIdent.createS' [ "JsonParse" ]) (SynExpr.CreateConst true)
+                                SynAttribute.create
+                                    (SynLongIdent.createS' [ "JsonSerialize" ])
+                                    (SynExpr.CreateConst true)
+                            ]
+                        |> fun sci ->
+                            match obj.Description with
+                            | None -> sci
+                            | Some doc -> sci |> SynComponentInfo.withDocString (PreXmlDoc.create doc)
+
+                    properties |> SynTypeDefnRepr.record |> SynTypeDefn.create sci
+
+                let defn =
+                    {
+                        Signature = SynType.named fSharpTypeName
+                        FSharpDefinition = Some defn
+                    }
+
+                defn |> Some
+
+            | SwaggerV2.Definition.Array elt ->
+                let child = defnToType anonymousTypeCount handlesMap bigCache thisKey None elt.Items
+
+                match child with
+                | None -> None
+                | Some child ->
+                    let defn =
+                        {
+                            Signature = SynType.list child.Signature
+                            FSharpDefinition = None
+                        }
+
+                    Some defn
+            | SwaggerV2.Definition.String ->
+                {
+                    Signature = SynType.string
+                    FSharpDefinition = None
+                }
+                |> Some
+            | SwaggerV2.Definition.Boolean ->
+                {
+                    Signature = SynType.bool
+                    FSharpDefinition = None
+                }
+                |> Some
+            | SwaggerV2.Definition.Unspecified ->
+                {
+                    Signature = SynType.unit
+                    FSharpDefinition = None
+                }
+                |> Some
+            | SwaggerV2.Definition.Integer _ ->
+                {
+                    Signature = SynType.createLongIdent' [ "int" ]
+                    FSharpDefinition = None
+                }
+                |> Some
+            | SwaggerV2.Definition.File ->
+                {
+                    Signature = SynType.createLongIdent' [ "System" ; "IO" ; "Stream" ]
+                    FSharpDefinition = None
+                }
+                |> Some
+            | SwaggerV2.Definition.Handle s ->
+                let split = s.Split '/' |> List.ofArray
+
+                match split with
+                | [ "#" ; _location ; _handle ] ->
+                    match handlesMap.TryGetValue s with
+                    | false, _ -> None
+                    | true, computed ->
+                        let defn =
+                            {
+                                FSharpDefinition = None
+                                Signature = computed.Signature
+                            }
+
+                        defn |> Some
+                | _ -> failwith $"we don't know how to deal with object handle %s{s}"
+
+        match result with
+        | None -> None
+        | Some result ->
+
+        match handleKey with
+        | None -> ()
+        | Some handleKey -> handlesMap.Add (handleKey, result)
+
+        cache.Add (d, result)
+        Some result
+
+    let instantiateRequiredTypes (types : Types) : SynModuleDecl =
+        types.ByDefinition
+        |> Seq.choose (fun (KeyValue (_defn, typeEntry)) -> typeEntry.FSharpDefinition)
+        |> Seq.toList
+        |> SynModuleDecl.createTypes
+
+    type private IsIn =
+        | Path of str : string
+        | Query of str : string
+        | Body
+
+    let computeType
+        (options : SwaggerClientConfig)
+        (basePath : string)
+        (types : Types)
+        (clientDocString : PreXmlDoc)
+        (endpoints : Endpoint list)
+        : SynModuleDecl list
+        =
+        endpoints
+        |> List.choose (fun ep ->
+            let name = (Ident.createSanitisedTypeName (ep.Operation.ToString ())).idText
+
+            match renderType types ep.ReturnType with
+            | None ->
+                log $"Skipping %O{ep.Operation}: Couldn't render return type: %O{ep.ReturnType}"
+                None
+            | Some returnType ->
+
+            let pars =
+                ep.Parameters
+                |> List.map (fun par ->
+                    let inParam =
+                        match par.In with
+                        | SwaggerV2.ParameterIn.Unrecognised (f, name) ->
+                            log
+                                $"Skipping %O{ep.Operation} at %s{ep.Endpoint}: unrecognised In parameter %s{f} with name %s{name}"
+
+                            None
+                        | SwaggerV2.ParameterIn.Body -> Some IsIn.Body
+                        | SwaggerV2.ParameterIn.Query name -> Some (IsIn.Query name)
+                        | SwaggerV2.ParameterIn.Path name -> Some (IsIn.Path name)
+
+                    match inParam with
+                    | None -> None
+                    | Some inParam ->
+
+                    match renderType types par.Type with
+                    | None ->
+                        // Couldn't render the return type
+                        // failwith "Did not have a type here"
+                        log $"Skipping %O{ep.Operation}: Couldn't render parameter: %O{par.Type}"
+                        None
+                    | Some v -> Some (Ident.createSanitisedParamName par.Name, inParam, v)
+                )
+                |> List.allSome
+
+            match pars with
+            | None -> None
+            | Some pars ->
+
+            let arity =
+                SynValInfo.SynValInfo (
+                    [
+                        ep.Parameters
+                        |> List.map (fun par ->
+                            let name = par.Name |> Ident.create |> Some
+                            SynArgInfo.SynArgInfo ([], false, name)
+                        )
+                        |> fun l -> l @ [ SynArgInfo.SynArgInfo ([], true, Some (Ident.create "ct")) ]
+                    ],
+                    SynArgInfo.SynArgInfo ([], false, None)
+                )
+
+            let domain =
+                let ctParam =
+                    SynType.signatureParamOfType
+                        []
+                        (SynType.createLongIdent' [ "System" ; "Threading" ; "CancellationToken" ])
+                        true
+                        (Some (Ident.create "ct"))
+
+                let argParams =
+                    pars
+                    |> List.map (fun (ident, isIn, t) ->
+                        let attr : SynAttribute list =
+                            match isIn with
+                            | IsIn.Path name ->
+                                SynAttribute.create
+                                    (SynLongIdent.createS' [ "RestEase" ; "Path" ])
+                                    (SynExpr.CreateConst name)
+                                |> List.singleton
+                            | IsIn.Query name ->
+                                SynAttribute.create
+                                    (SynLongIdent.createS' [ "RestEase" ; "Query" ])
+                                    (SynExpr.CreateConst name)
+                                |> List.singleton
+                            | IsIn.Body ->
+                                SynAttribute.create
+                                    (SynLongIdent.createS' [ "RestEase" ; "Body" ])
+                                    (SynExpr.CreateConst ())
+                                |> List.singleton
+
+                        SynType.signatureParamOfType attr t false (Some ident)
+                    )
+
+                SynType.tupleNoParen (argParams @ [ ctParam ]) |> Option.get
+
+            let attrs =
+                [
+                    SynAttribute.create
+                        (SynLongIdent.createS' [ "RestEase" ; ep.Method.ToString () ])
+                        // Gitea, at least, starts with a `/`, which `Uri` then takes to indicate an absolute path.
+                        (SynExpr.CreateConst (ep.Endpoint.TrimStart '/'))
+
+                    match ep.Produces with
+                    | Produces.Produces contentType ->
+                        SynAttribute.create
+                            (SynLongIdent.createS' [ "RestEase" ; "Header" ])
+                            // Gitea, at least, starts with a `/`, which `Uri` then takes to indicate an absolute path.
+                            (SynExpr.tuple [ SynExpr.CreateConst "Content-Type" ; SynExpr.CreateConst contentType ])
+                    | Produces.OctetStream ->
+                        SynAttribute.create
+                            (SynLongIdent.createS' [ "RestEase" ; "Header" ])
+                            // Gitea, at least, starts with a `/`, which `Uri` then takes to indicate an absolute path.
+                            (SynExpr.tuple
+                                [
+                                    SynExpr.CreateConst "Content-Type"
+                                    SynExpr.CreateConst "application/octet-stream"
+                                ])
+                ]
+
+            returnType
+            |> SynType.task
+            |> SynType.toFun [ domain ]
+            |> SynMemberDefn.abstractMember attrs (SynIdent.createS name) None arity ep.DocString
+            |> Some
+        )
+        |> SynTypeDefnRepr.interfaceType
+        |> SynTypeDefn.create (
+            let attrs =
+                [
+                    yield SynAttribute.create (SynLongIdent.createS' [ "HttpClient" ]) (SynExpr.CreateConst false)
+                    yield
+                        SynAttribute.create
+                            (SynLongIdent.createS' [ "RestEase" ; "BasePath" ])
+                            (SynExpr.CreateConst basePath)
+                    match options.CreateMock with
+                    | None -> ()
+                    | Some createMockValue ->
+                        yield
+                            SynAttribute.create
+                                (SynLongIdent.createS' [ "GenerateMock" ])
+                                (SynExpr.CreateConst createMockValue)
+                ]
+
+            SynComponentInfo.create (Ident.create ("I" + options.ClassName))
+            |> SynComponentInfo.withDocString clientDocString
+            |> SynComponentInfo.addAttributes attrs
+        )
+        |> List.singleton
+        |> SynModuleDecl.createTypes
+        |> List.singleton
+
+open Myriad.Core
+open System.IO
+
+[<RequireQualifiedAccess>]
+module internal SwaggerV2Generator =
+    let generate (pars : Map<string, string>) (contents : SwaggerV2.SwaggerV2) : Output =
+        let scheme =
+            let preferred = SwaggerV2.Scheme "https"
+
+            if List.isEmpty contents.Schemes then
+                failwith "no schemes specified in API spec!"
+
+            if List.contains preferred contents.Schemes then
+                preferred
+            else
+                List.head contents.Schemes
+
+        let clientDocstring = contents.Info.Description |> PreXmlDoc.create
+
+        let basePath = contents.BasePath
+
+        let typeDefs =
+            let bigCache = Dictionary<_, Dictionary<_, _>> ()
+
+            let countAll () =
+                (0, bigCache) ||> Seq.fold (fun count (KeyValue (_, v)) -> count + v.Count)
+
+            let byHandle = Dictionary ()
+            let anonymousTypeCount = ref 0
+
+            let rec go (contents : ((string * SwaggerV2.Definition) * string) list) =
+                let lastRound = countAll ()
+
+                contents
+                |> List.filter (fun ((name, defn), defnClass) ->
+                    let doIt =
+                        SwaggerClientGenerator.defnToType
+                            anonymousTypeCount
+                            byHandle
+                            bigCache
+                            defnClass
+                            (Some name)
+                            defn
+
+                    match doIt with
+                    | None -> true
+                    | Some _ -> false
+                )
+                |> fun remaining ->
+                    if not remaining.IsEmpty then
+                        let currentCount = countAll ()
+
+                        if currentCount = lastRound then
+                            for (name, remaining), kind in remaining do
+                                SwaggerClientGenerator.log $"Remaining: %s{name} (%s{kind})"
+
+                            SwaggerClientGenerator.log "--------"
+
+                            for KeyValue (handle, defn) in byHandle do
+                                SwaggerClientGenerator.log $"Known: %s{handle} %O{defn}"
+
+                            // TODO: ohh noooooo the Gitea spec is genuinely circular,
+                            // it's impossible to construct a Repository type
+                            // we're going to have to somehow detect this case and break the cycle
+                            // by artificially making a property optional
+                            // :sob: Gitea why are you like this
+                            // failwith "Made no further progress rendering types"
+                            ()
+                        else
+                            go remaining
+
+            seq {
+                for defnClass in [ "definitions" ; "responses" ] do
+                    match defnClass with
+                    | "definitions" ->
+                        for KeyValue (k, v) in contents.Definitions do
+                            yield (k, v), defnClass
+                    | "responses" ->
+                        for KeyValue (k, v) in contents.Responses do
+                            yield (k, v.Schema), defnClass
+                    | _ -> failwith "oh no"
+            }
+            |> Seq.toList
+            |> go
+
+            let result = Dictionary ()
+
+            for KeyValue (_container, types) in bigCache do
+                for KeyValue (defn, rendered) in types do
+                    result.TryAdd (defn, rendered) |> ignore<bool>
+
+            {
+                ByHandle = byHandle
+                ByDefinition = result :> IReadOnlyDictionary<_, _>
+            }
+
+        let summary =
+            contents.Paths
+            |> Seq.collect (fun (KeyValue (path, endpoints)) ->
+                endpoints
+                |> Seq.choose (fun (KeyValue (method, endpoint)) ->
+                    let docstring = endpoint.Summary |> PreXmlDoc.create
+
+                    let produces =
+                        match endpoint.Produces with
+                        | None -> Produces.Produces "json"
+                        | Some [] -> failwith $"API specified empty Produces: %s{path} (%O{method})"
+                        | Some [ SwaggerV2.MimeType "application/octet-stream" ] -> Produces.OctetStream
+                        | Some [ SwaggerV2.MimeType "application/json" ] -> Produces.Produces "json"
+                        | Some [ SwaggerV2.MimeType (StartsWith "text/" t) ] -> Produces.Produces t
+                        | Some [ SwaggerV2.MimeType s ] ->
+                            failwithf
+                                $"we don't support non-JSON Produces right now, got: %s{s} (%s{path} %O{method})"
+                        | Some (_ :: _) ->
+                            failwith $"we don't support multiple Produces right now, at %s{path} (%O{method})"
+
+                    let returnType =
+                        endpoint.Responses
+                        |> Seq.choose (fun (KeyValue (response, defn)) ->
+                            if 200 <= response && response < 300 then
+                                Some defn
+                            else
+                                None
+                        )
+                        |> Seq.toList
+
+                    let returnType =
+                        match returnType with
+                        | [ t ] -> Some t
+                        | [] -> failwith $"got no successful response results, %s{path} %O{method}"
+                        | _ ->
+                            SwaggerClientGenerator.log
+                                $"Ignoring %s{path} %O{method} due to multiple success responses"
+                            // can't be bothered to work out how to deal with multiple success
+                            // results right now
+                            None
+
+                    match returnType with
+                    | None -> None
+                    | Some returnType ->
+
+                    {
+                        Method = method
+                        Produces = produces
+                        DocString = docstring
+                        ReturnType = returnType
+                        Operation = endpoint.OperationId
+                        Parameters = endpoint.Parameters |> Option.defaultValue []
+                        Endpoint = path
+                    }
+                    |> Some
+                )
+                |> Seq.toList
+            )
+            |> Seq.toList
+
+        let config =
+            let createMock =
+                match Map.tryFind "GENERATEMOCKVISIBILITY" pars with
+                | None -> None
+                | Some v ->
+                    match v.ToLowerInvariant () with
+                    | "internal" -> Some true
+                    | "public" -> Some false
+                    | _ ->
+                        failwith
+                            $"Expected GenerateMockVisibility parameter to be 'internal' or 'public', but was: '%s{v.ToLowerInvariant ()}'"
+
+            let className =
+                match Map.tryFind "CLASSNAME" pars with
+                | None -> failwith "You must supply the <ClassName /> parameter in <MyriadParams />."
+                | Some v -> v
+
+            {
+                CreateMock = createMock
+                ClassName = className
+            }
+
+        let ty =
+            SwaggerClientGenerator.computeType config basePath typeDefs clientDocstring summary
+
+        [
+            yield
+                SynModuleDecl.Open (
+                    SynOpenDeclTarget.ModuleOrNamespace (
+                        SynLongIdent.createS' [ "WoofWare" ; "Myriad" ; "Plugins" ],
+                        range0
+                    ),
+                    range0
+                )
+            yield SwaggerClientGenerator.instantiateRequiredTypes typeDefs
+            yield! ty
+        ]
+        |> SynModuleOrNamespace.createNamespace [ Ident.create config.ClassName ]
+        |> List.singleton
+        |> Output.Ast
+
+/// Myriad generator that stamps out an interface and class to access a Swagger-specified API.
+[<MyriadGenerator("swagger-client")>]
+type SwaggerClientGenerator () =
+
+    interface IMyriadGenerator with
+        member _.ValidInputExtensions = [ ".json" ]
+
+        member _.Generate (context : GeneratorContext) =
+            let pars = MyriadParamParser.render context.AdditionalParameters
+
+            let pars =
+                pars
+                |> Map.toSeq
+                |> Seq.map (fun (k, v) -> k.ToUpperInvariant (), v)
+                |> Map.ofSeq
+
+            if pars.IsEmpty then
+                failwith "No parameters given. You must supply the <ClassName /> parameter in <MyriadParams />."
+
+            let contents = File.ReadAllText context.InputFilename |> SwaggerV2.parse
+
+            match contents with
+            | Ok contents -> SwaggerV2Generator.generate pars contents
+            | Error node -> failwith "Input was not a Swagger 2 spec"
--- a/WoofWare.Myriad.Plugins/SwaggerV2.fs
+++ b/WoofWare.Myriad.Plugins/SwaggerV2.fs
@@ -0,0 +1,480 @@
+module internal WoofWare.Myriad.Plugins.SwaggerV2
+
+open System
+open System.Text.Json.Nodes
+
+/// A MIME type, like "application/json"
+type MimeType =
+    /// A MIME type, like "application/json"
+    | MimeType of string
+
+/// A URL scheme, like "https"
+type Scheme =
+    /// A URL scheme, like "https"
+    | Scheme of string
+
+/// "Licence information for the exposed API", whatever that means.
+type SwaggerLicense =
+    {
+        /// "The license name used for the API", whatever that means.
+        Name : string
+        /// Link to the license used. Mutually exclusive with `Identifier`.
+        Url : Uri option
+        /// SPDX license identifier. Mutually exclusive with `Url`.
+        Identifier : string option
+    }
+
+    /// Render a JsonObject into the strongly-typed version, performing sanity
+    /// checks and throwing on input that can't be parsed.
+    static member Parse (node : JsonObject) : SwaggerLicense =
+        let name = asString node "name"
+        let url = asOpt<string> node "url" |> Option.map Uri
+        let identifier = asOpt<string> node "identifier"
+
+        match url, identifier with
+        | Some _, Some _ -> failwith "Invalid license spec: cannot supply both URL and identifier"
+        | _, _ -> ()
+
+        {
+            Name = name
+            Url = url
+            Identifier = identifier
+        }
+
+/// Overall information about the API described by this Swagger spec.
+type SwaggerInfo =
+    {
+        /// Human-readable description of what this Swagger API is for.
+        /// Supports GitHub-flavoured markdown, apparently.
+        Description : string
+        /// Human-readable title of the service to which this is an API.
+        Title : string
+        /// The license applying to this schema. It's very unclear what this means.
+        /// The spec just says:
+        /// "Licence information for the exposed API"
+        License : SwaggerLicense
+        /// The version of this API (not the version of Swagger or the file defining the API!).
+        /// Strictly speaking this can be anything, but I am assuming it's roughly
+        /// SemVer.
+        Version : Version
+    }
+
+    /// Render a JsonObject into the strongly-typed version, performing sanity
+    /// checks and throwing on input that can't be parsed.
+    static member Parse (node : JsonObject) : SwaggerInfo =
+        let description = asString node "description"
+        let title = asString node "title"
+        let version = asString node "version" |> Version.Parse
+        let license = asObj node "license" |> SwaggerLicense.Parse
+
+        {
+            Description = description
+            Title = title
+            License = license
+            Version = version
+        }
+
+/// An "optional unique string used to describe an operation".
+/// If present, these are assumed to be unique among all operations described
+/// in the API.
+type OperationId =
+    /// An "optional unique string used to describe an operation".
+    /// If present, these are assumed to be unique among all operations described
+    /// in the API.
+    | OperationId of string
+
+    /// Round-trip string representation.
+    override this.ToString () =
+        match this with
+        | OperationId.OperationId s -> s
+
+/// Constraints on the `additionalProperties` (in the JSON schema sense).
+/// "Additional properties" are properties of a JSON object which were not
+/// listed in the schema.
+type AdditionalProperties =
+    /// No additional properties are allowed: all properties must have been
+    /// mentioned in the schema.
+    | Never
+    /// Additional properties are permitted, but if they exist, they must
+    /// match this schema definition.
+    | Constrained of Definition
+
+/// The Swagger schema lets you define types. An ObjectTypeDefinition
+/// is specifically the information about types defined as `"type": "object"`.
+and ObjectTypeDefinition =
+    {
+        /// Human-readable description of the purpose of this type.
+        Description : string option
+        /// Fields which any object must have to satisfy this type.
+        Properties : Map<string, Definition> option
+        /// Extra properties in the type description. In Gitea, these are
+        /// (for example) "x-go-package":"code.gitea.io/gitea/modules/structs".
+        Extras : Map<string, JsonNode>
+        /// List of fields which are required; all other fields are optional.
+        Required : string list option
+        /// Constraints, if any, placed on fields which are not mentioned in
+        /// the schema. If absent, there are no constraints.
+        AdditionalProperties : AdditionalProperties option
+        /// Example of an object which satisfies this schema.
+        Example : JsonObject option
+    }
+
+    /// Render a JsonObject into the strongly-typed version, performing sanity
+    /// checks and throwing on input that can't be parsed.
+    static member Parse (node : JsonObject) : ObjectTypeDefinition =
+        let description =
+            match asOpt<string> node "description", asOpt<string> node "title" with
+            | None, None -> None
+            | Some v, None
+            | None, Some v -> Some v
+            | Some v1, Some v2 -> failwith "both description and title were given"
+
+        let additionalProperties =
+            match node.["additionalProperties"] with
+            | null -> None
+            | :? JsonValue as p ->
+                if not (p.GetValue<bool> ()) then
+                    Some AdditionalProperties.Never
+                else
+                    failwith $"additionalProperties should be 'false' or an object, but was: %s{p.ToJsonString ()}"
+            | p ->
+                let p = p.AsObject ()
+                Definition.Parse p |> AdditionalProperties.Constrained |> Some
+
+        let properties =
+            match node.["properties"] with
+            | null -> None
+            | p ->
+                p.AsObject ()
+                |> Seq.map (fun (KeyValue (key, value)) ->
+                    let value = value.AsObject ()
+                    key, Definition.Parse value
+                )
+                |> Map.ofSeq
+                |> Some
+
+        let example =
+            match node.["example"] with
+            | null -> None
+            | :? JsonObject as o -> Some o
+            | _ ->
+                // Gitea returns a stringified and malformed JSON object here.
+                // Don't throw; just omit.
+                None
+
+        let required = asArrOpt'<string> node "required"
+
+        let extras =
+            node.AsObject ()
+            |> Seq.choose (fun (KeyValue (key, value)) ->
+                match key with
+                | "type"
+                | "description"
+                | "title"
+                | "additionalProperties"
+                | "example"
+                | "required"
+                | "properties" -> None
+                | _ -> Some (key, value)
+            )
+            |> Map.ofSeq
+
+        {
+            Description = description
+            Properties = properties
+            AdditionalProperties = additionalProperties
+            Required = required
+            Extras = extras
+            Example = example
+        }
+
+/// The Swagger schema lets you define types. An ArrayTypeDefinition
+/// is specifically the information about types defined as `"type": "array"`.
+and ArrayTypeDefinition =
+    {
+        /// The type is `'a array`; this field describes `'a`.
+        Items : Definition
+    }
+
+    /// Render a JsonNode into the strongly-typed version, performing sanity
+    /// checks and throwing on input that can't be parsed.
+    static member Parse (n : JsonNode) : ArrayTypeDefinition =
+        let items = asObj n "items" |> Definition.Parse
+
+        {
+            Items = items
+        }
+
+/// Any definition of a type in the Swagger document. This is basically any
+/// information associated with the `"type": "blah"` field.
+and Definition =
+    /// For example, if `"$ref": "#/responses/Blah", then this is "#/responses/Blah".
+    | Handle of string
+    /// A type definition with "type": "object".
+    | Object of ObjectTypeDefinition
+    /// A type definition with "type": "array".
+    | Array of ArrayTypeDefinition
+    /// A type definition with "type": "string".
+    | String
+    /// A type definition with "type": "boolean".
+    | Boolean
+    /// A response without a body has no "schema" specified.
+    | Unspecified
+    /// A type definition with "type": "integer".
+    /// The format is an optional hint which could be e.g. "int64" or "int32".
+    /// https://swagger.io/docs/specification/data-models/data-types/#numbers
+    | Integer of format : string option
+    /// Not a JSON schema type, but a Swagger 2.0 type.
+    | File
+
+    /// Render a JsonObject into this strongly-typed specification.
+    static member Parse (n : JsonObject) : Definition =
+        match n.["$ref"] |> Option.ofObj with
+        | Some ref -> Definition.Handle (ref.GetValue<string> ())
+        | None ->
+
+        let ty = asOpt<string> n "type"
+
+        match ty with
+        | None -> Definition.Unspecified
+        | Some "object" -> ObjectTypeDefinition.Parse n |> Definition.Object
+        | Some "array" -> ArrayTypeDefinition.Parse n |> Definition.Array
+        | Some "string" -> Definition.String
+        | Some "boolean" -> Definition.Boolean
+        | Some "file" -> Definition.File
+        | Some "integer" ->
+            let format = asOpt<string> n "format"
+            Definition.Integer format
+        | Some ty -> failwith $"Unrecognised type: %s{ty}"
+
+/// REST APIs allow their parameters to be passed in various ways. This describes
+/// how one single parameter is passed.
+type ParameterIn =
+    /// The parameter is interpolated into the path, e.g. "/foo/{blah}".
+    /// The "name" is what we replace in the path: e.g. "/foo/{person}" would
+    /// have a name of "person".
+    | Path of name : string
+    /// The parameter is appended to the URL's query params, e.g. "?<name>=blah"
+    | Query of name : string
+    /// The parameter is passed in the body of the HTTP request.
+    | Body
+    /// Some spec that WoofWare.Myriad doesn't support.
+    | Unrecognised of op : string * name : string
+
+/// Description of a single input parameter to an endpoint.
+type SwaggerParameter =
+    {
+        /// The type schema to which this parameter must conform.
+        Type : Definition
+        /// Optional human-readable description of this parameter.
+        Description : string option
+        /// How this parameter is passed.
+        In : ParameterIn
+        /// Name of this parameter. For most `In` values, this name is the
+        /// name of the parameter as supplied to the API at runtime, and in WoofWare's
+        /// strongly-typed domain types this information is also contained in the `In` field.
+        /// For `Body` parameters, this is purely for dev-time information.
+        Name : string
+        /// Whether this parameter is required for validation to succeed.
+        /// I think this defaults to "no".
+        Required : bool option
+    }
+
+    /// Render a JsonObject into this strongly-typed specification.
+    static member Parse (node : JsonObject) : SwaggerParameter =
+        let ty =
+            match asObjOpt node "schema" with
+            | None -> Definition.Parse node
+            | Some node -> Definition.Parse node
+
+        let description = asOpt<string> node "description"
+        let name = asString node "name"
+
+        let paramIn =
+            match asString node "in" with
+            | "path" -> ParameterIn.Path name
+            | "query" -> ParameterIn.Query name
+            | "body" -> ParameterIn.Body
+            | f -> ParameterIn.Unrecognised (f, name)
+
+        let required = asOpt<bool> node "required"
+
+        {
+            Type = ty
+            Description = description
+            In = paramIn
+            Name = name
+            Required = required
+        }
+
+/// An "endpoint" is basically a single HTTP verb, applied to some path.
+type SwaggerEndpoint =
+    {
+        /// The MIME types we should send our request body in.
+        /// This overrides (does not extend) any global definitions on the spec itself.
+        Consumes : MimeType list option
+        /// The MIME types we should expect to receive in response to this request.
+        /// This overrides (does not extend) any global definitions on the spec itself.
+        Produces : MimeType list option
+        /// Arbitrary list of [tags](https://swagger.io/docs/specification/2-0/grouping-operations-with-tags/).
+        Tags : string list
+        /// Human-readable description of the endpoint.
+        Summary : string
+        /// Arbitrary identifier of this endpoint; this must be unique across *all* endpoints
+        /// in this entire spec.
+        OperationId : OperationId
+        /// Parameters that must be supplied at HTTP-request-time to the endpoint.
+        /// (Each parameter knows how it needs to be supplied: e.g. if it's a query parameter or
+        /// if it's interpolated into the path.)
+        Parameters : SwaggerParameter list option
+        /// Map of HTTP response code to the type that we expect to receive in the body if we
+        /// get that response code back.
+        Responses : Map<int, Definition>
+    }
+
+    /// Render a JsonObject into this strongly-typed specification.
+    static member Parse (r : JsonObject) : SwaggerEndpoint =
+        let produces = asArrOpt'<string> r "produces" |> Option.map (List.map MimeType)
+        let consumes = asArrOpt'<string> r "consumes" |> Option.map (List.map MimeType)
+        let tags = asArr'<string> r "tags"
+        let summary = asString r "summary"
+        let operationId = asString r "operationId" |> OperationId
+
+        let responses =
+            asObj r "responses"
+            |> Seq.map (fun (KeyValue (key, value)) ->
+                let value = value.AsObject ()
+                Int32.Parse key, Definition.Parse value
+            )
+            |> Map.ofSeq
+
+        let parameters =
+            asArrOpt r "parameters"
+            |> Option.map (fun pars ->
+                pars
+                |> Seq.map (fun par -> par.AsObject () |> SwaggerParameter.Parse)
+                |> Seq.toList
+            )
+
+        {
+            Produces = produces
+            Consumes = consumes
+            Tags = tags
+            Summary = summary
+            OperationId = operationId
+            Parameters = parameters
+            Responses = responses
+        }
+
+/// Specifies the form a response to an endpoint will take if it's complying with this spec.
+type Response =
+    {
+        /// Human-readable description.
+        Description : string
+        /// Specification of the type to which responses will conform under this spec.
+        Schema : Definition
+    }
+
+    /// Render a JsonObject into this strongly-typed specification.
+    static member Parse (r : JsonObject) : Response =
+        let desc = asString r "description"
+
+        let schema =
+            match asObjOpt r "schema" with
+            | None -> Definition.Unspecified
+            | Some s -> Definition.Parse s
+
+        {
+            Description = desc
+            Schema = schema
+        }
+
+/// A Swagger API specification.
+type SwaggerV2 =
+    {
+        /// Global collection of MIME types which any endpoint expects to consume its inputs in.
+        /// This may be overridden on any individual endpoint by that endpoint.
+        Consumes : MimeType list
+        /// Global collection of MIME types which any endpoint will produce.
+        /// This may be overridden on any individual endpoint by that endpoint.
+        Produces : MimeType list
+        /// HTTP or HTTPS, for example. Indicates which scheme to access the API on.
+        Schemes : Scheme list
+        /// The version of OpenAPI this specification is written against.
+        /// (As of this writing, we only support 2.0.)
+        Swagger : Version
+        /// General information about this API.
+        Info : SwaggerInfo
+        /// Path under the URI host, which should be prefixed (with trailing slash if necessary)
+        /// to all requests.
+        BasePath : string
+        /// Map from relative path to "what is served at that path".
+        Paths : Map<string, Map<HttpMethod, SwaggerEndpoint>>
+        /// Types defined in the schema. Requests may use these definitions just like in any other JSON schema.
+        /// Key is a domain type name, e.g. "APIError".
+        Definitions : Map<string, Definition>
+        /// Types of each response.
+        /// Key is a domain type name, e.g. "AccessToken".
+        Responses : Map<string, Response>
+    }
+
+/// Parse a JSON-schema-based specification of a Swagger 2.0 API and
+/// build the strongly-typed version. Throws on invalid inputs; returns Error if the input is JSON but has a Swagger
+/// version that is not in the 2.0 series.
+let parse (s : string) : Result<SwaggerV2, JsonNode> =
+    let node = JsonNode.Parse s
+    let swagger = asString node "swagger" |> Version.Parse
+
+    if swagger.Major <> 2 then
+        Error node
+    else
+
+    let consumes = asArr'<string> node "consumes" |> List.map MimeType
+    let produces = asArr'<string> node "produces" |> List.map MimeType
+    let schemes = asArr'<string> node "schemes" |> List.map Scheme
+    let info = asObj node "info" |> SwaggerInfo.Parse
+    let basePath = asString node "basePath"
+
+    let definitions =
+        asObj node "definitions"
+        |> Seq.map (fun (KeyValue (key, value)) ->
+            let value = value.AsObject ()
+            key, Definition.Parse value
+        )
+        |> Map.ofSeq
+
+    let paths =
+        asObj node "paths"
+        |> Seq.map (fun (KeyValue (key, value)) ->
+            let contents =
+                value.AsObject ()
+                |> Seq.map (fun (KeyValue (endpoint, contents)) ->
+                    let contents = contents.AsObject ()
+                    HttpMethod.Parse endpoint, SwaggerEndpoint.Parse contents
+                )
+                |> Map.ofSeq
+
+            key, contents
+        )
+        |> Map.ofSeq
+
+    let responses =
+        asObj node "responses"
+        |> Seq.map (fun (KeyValue (key, value)) ->
+            let value = value.AsObject ()
+            key, Response.Parse value
+        )
+        |> Map.ofSeq
+
+    {
+        Consumes = consumes
+        Produces = produces
+        Schemes = schemes
+        Swagger = swagger
+        Info = info
+        BasePath = basePath
+        Paths = paths
+        Definitions = definitions
+        Responses = responses
+    }
+    |> Ok
--- a/WoofWare.Myriad.Plugins/SynAttribute.fs
+++ b/WoofWare.Myriad.Plugins/SynAttribute.fs
@@ -1,31 +0,0 @@
-namespace WoofWare.Myriad.Plugins
-
-open Fantomas.FCS.Syntax
-open Fantomas.FCS.Text.Range
-open Myriad.Core
-
-[<RequireQualifiedAccess>]
-module internal SynAttribute =
-    let internal compilationRepresentation : SynAttribute =
-        {
-            TypeName = SynLongIdent.CreateString "CompilationRepresentation"
-            ArgExpr =
-                SynExpr.CreateLongIdent (
-                    false,
-                    SynLongIdent.Create [ "CompilationRepresentationFlags" ; "ModuleSuffix" ],
-                    None
-                )
-                |> SynExpr.CreateParen
-            Target = None
-            AppliesToGetterAndSetter = false
-            Range = range0
-        }
-
-    let internal autoOpen : SynAttribute =
-        {
-            TypeName = SynLongIdent.CreateString "AutoOpen"
-            ArgExpr = SynExpr.CreateConst SynConst.Unit
-            Target = None
-            AppliesToGetterAndSetter = false
-            Range = range0
-        }
--- a/WoofWare.Myriad.Plugins/SynExpr.fs
+++ b/WoofWare.Myriad.Plugins/SynExpr.fs
@@ -1,313 +0,0 @@
-namespace WoofWare.Myriad.Plugins
-
-open Fantomas.FCS.Syntax
-open Fantomas.FCS.SyntaxTrivia
-open Myriad.Core
-open Myriad.Core.Ast
-open Fantomas.FCS.Text.Range
-
-type internal CompExprBinding =
-    | LetBang of varName : string * rhs : SynExpr
-    | Let of varName : string * rhs : SynExpr
-    | Use of varName : string * rhs : SynExpr
-    | Do of body : SynExpr
-
-[<RequireQualifiedAccess>]
-module internal SynExpr =
-
-    /// {expr} |> {func}
-    let pipeThroughFunction (func : SynExpr) (expr : SynExpr) : SynExpr =
-        SynExpr.CreateApp (
-            SynExpr.CreateAppInfix (
-                SynExpr.CreateLongIdent (
-                    SynLongIdent.SynLongIdent (
-                        [ Ident.Create "op_PipeRight" ],
-                        [],
-                        [ Some (IdentTrivia.OriginalNotation "|>") ]
-                    )
-                ),
-                expr
-            ),
-            func
-        )
-
-    /// if {cond} then {trueBranch} else {falseBranch}
-    /// Note that this function puts the trueBranch last, for pipelining convenience:
-    /// we assume that the `else` branch is more like an error case and is less interesting.
-    let ifThenElse (cond : SynExpr) (falseBranch : SynExpr) (trueBranch : SynExpr) : SynExpr =
-        SynExpr.IfThenElse (
-            cond,
-            trueBranch,
-            Some falseBranch,
-            DebugPointAtBinding.Yes range0,
-            false,
-            range0,
-            {
-                IfKeyword = range0
-                IsElif = false
-                ThenKeyword = range0
-                ElseKeyword = Some range0
-                IfToThenRange = range0
-            }
-        )
-
-    /// try {body} with | {exc} as exc -> {handler}
-    let pipeThroughTryWith (exc : SynPat) (handler : SynExpr) (body : SynExpr) : SynExpr =
-        let clause =
-            SynMatchClause.Create (SynPat.As (exc, SynPat.CreateNamed (Ident.Create "exc"), range0), None, handler)
-
-        SynExpr.TryWith (
-            body,
-            [ clause ],
-            range0,
-            DebugPointAtTry.Yes range0,
-            DebugPointAtWith.Yes range0,
-            {
-                TryKeyword = range0
-                TryToWithRange = range0
-                WithKeyword = range0
-                WithToEndRange = range0
-            }
-        )
-
-    /// {a} = {b}
-    let equals (a : SynExpr) (b : SynExpr) =
-        SynExpr.CreateApp (
-            SynExpr.CreateAppInfix (
-                SynExpr.CreateLongIdent (
-                    SynLongIdent.SynLongIdent (
-                        Ident.CreateLong "op_Equality",
-                        [],
-                        [ Some (IdentTrivia.OriginalNotation "=") ]
-                    )
-                ),
-                a
-            ),
-            b
-        )
-
-    /// {a} + {b}
-    let plus (a : SynExpr) (b : SynExpr) =
-        SynExpr.CreateApp (
-            SynExpr.CreateAppInfix (
-                SynExpr.CreateLongIdent (
-                    SynLongIdent.SynLongIdent (
-                        Ident.CreateLong "op_Addition",
-                        [],
-                        [ Some (IdentTrivia.OriginalNotation "+") ]
-                    )
-                ),
-                a
-            ),
-            b
-        )
-
-    let rec stripOptionalParen (expr : SynExpr) : SynExpr =
-        match expr with
-        | SynExpr.Paren (expr, _, _, _) -> stripOptionalParen expr
-        | expr -> expr
-
-    /// Given e.g. "byte", returns "System.Byte".
-    let qualifyPrimitiveType (typeName : string) : LongIdent =
-        match typeName with
-        | "float32" -> [ "System" ; "Single" ]
-        | "float" -> [ "System" ; "Double" ]
-        | "byte"
-        | "uint8" -> [ "System" ; "Byte" ]
-        | "sbyte" -> [ "System" ; "SByte" ]
-        | "int16" -> [ "System" ; "Int16" ]
-        | "int" -> [ "System" ; "Int32" ]
-        | "int64" -> [ "System" ; "Int64" ]
-        | "uint16" -> [ "System" ; "UInt16" ]
-        | "uint"
-        | "uint32" -> [ "System" ; "UInt32" ]
-        | "uint64" -> [ "System" ; "UInt64" ]
-        | _ -> failwith $"Unable to identify a parsing function `string -> %s{typeName}`"
-        |> List.map Ident.Create
-
-    /// {obj}.{meth} {arg}
-    let callMethodArg (meth : string) (arg : SynExpr) (obj : SynExpr) : SynExpr =
-        SynExpr.CreateApp (
-            SynExpr.DotGet (
-                obj,
-                range0,
-                SynLongIdent.SynLongIdent (id = [ Ident.Create meth ], dotRanges = [], trivia = [ None ]),
-                range0
-            ),
-            arg
-        )
-
-    /// {obj}.{meth}()
-    let callMethod (meth : string) (obj : SynExpr) : SynExpr =
-        callMethodArg meth (SynExpr.CreateConst SynConst.Unit) obj
-
-    /// {obj}.{meth}<ty>()
-    let callGenericMethod (meth : string) (ty : string) (obj : SynExpr) : SynExpr =
-        SynExpr.CreateApp (
-            SynExpr.TypeApp (
-                SynExpr.DotGet (obj, range0, SynLongIdent.Create [ meth ], range0),
-                range0,
-                [ SynType.CreateLongIdent ty ],
-                [],
-                Some range0,
-                range0,
-                range0
-            ),
-            SynExpr.CreateConst SynConst.Unit
-        )
-
-    let index (property : SynExpr) (obj : SynExpr) : SynExpr =
-        SynExpr.DotIndexedGet (obj, property, range0, range0)
-
-    /// (fun {varName} -> {body})
-    let createLambda (varName : string) (body : SynExpr) : SynExpr =
-        let parsedDataPat = [ SynPat.CreateNamed (Ident.Create varName) ]
-
-        SynExpr.Lambda (
-            false,
-            false,
-            SynSimplePats.Create [ SynSimplePat.CreateId (Ident.Create varName) ],
-            body,
-            Some (parsedDataPat, body),
-            range0,
-            {
-                ArrowRange = Some range0
-            }
-        )
-        |> SynExpr.CreateParen
-
-    let reraise : SynExpr =
-        SynExpr.CreateApp (SynExpr.CreateIdent (Ident.Create "reraise"), SynExpr.CreateConst SynConst.Unit)
-
-    /// {body} |> fun a -> Async.StartAsTask (a, ?cancellationToken=ct)
-    let startAsTask (ct : SynLongIdent) (body : SynExpr) =
-        let lambda =
-            SynExpr.CreateApp (
-                SynExpr.CreateLongIdent (SynLongIdent.Create [ "Async" ; "StartAsTask" ]),
-                SynExpr.CreateParenedTuple
-                    [
-                        SynExpr.CreateLongIdent (SynLongIdent.CreateString "a")
-                        equals
-                            (SynExpr.LongIdent (true, SynLongIdent.CreateString "cancellationToken", None, range0))
-                            (SynExpr.CreateLongIdent ct)
-                    ]
-            )
-            |> createLambda "a"
-
-        pipeThroughFunction lambda body
-
-    /// {compExpr} { {lets} ; return {ret} }
-    let createCompExpr (compExpr : string) (retBody : SynExpr) (lets : CompExprBinding list) : SynExpr =
-        let retStatement = SynExpr.YieldOrReturn ((false, true), retBody, range0)
-
-        let contents : SynExpr =
-            (retStatement, List.rev lets)
-            ||> List.fold (fun state binding ->
-                match binding with
-                | LetBang (lhs, rhs) ->
-                    SynExpr.LetOrUseBang (
-                        DebugPointAtBinding.Yes range0,
-                        false,
-                        true,
-                        SynPat.CreateNamed (Ident.Create lhs),
-                        rhs,
-                        [],
-                        state,
-                        range0,
-                        {
-                            EqualsRange = Some range0
-                        }
-                    )
-                | Let (lhs, rhs) ->
-                    SynExpr.LetOrUse (
-                        false,
-                        false,
-                        [ SynBinding.Let (pattern = SynPat.CreateNamed (Ident.Create lhs), expr = rhs) ],
-                        state,
-                        range0,
-                        {
-                            SynExprLetOrUseTrivia.InKeyword = None
-                        }
-                    )
-                | Use (lhs, rhs) ->
-                    SynExpr.LetOrUse (
-                        false,
-                        true,
-                        [ SynBinding.Let (pattern = SynPat.CreateNamed (Ident.Create lhs), expr = rhs) ],
-                        state,
-                        range0,
-                        {
-                            SynExprLetOrUseTrivia.InKeyword = None
-                        }
-                    )
-                | Do body -> SynExpr.CreateSequential [ SynExpr.Do (body, range0) ; state ]
-            )
-
-        SynExpr.CreateApp (
-            SynExpr.CreateIdent (Ident.Create compExpr),
-            SynExpr.ComputationExpr (false, contents, range0)
-        )
-
-    /// {expr} |> Async.AwaitTask
-    let awaitTask (expr : SynExpr) : SynExpr =
-        expr
-        |> pipeThroughFunction (SynExpr.CreateLongIdent (SynLongIdent.Create [ "Async" ; "AwaitTask" ]))
-
-    /// {ident}.ToString ()
-    /// with special casing for some types like DateTime
-    let toString (ty : SynType) (ident : SynExpr) =
-        match ty with
-        | DateOnly -> ident |> callMethodArg "ToString" (SynExpr.CreateConstString "yyyy-MM-dd")
-        | DateTime ->
-            ident
-            |> callMethodArg "ToString" (SynExpr.CreateConstString "yyyy-MM-ddTHH:mm:ss")
-        | _ -> callMethod "ToString" ident
-
-    let upcast' (ty : SynType) (e : SynExpr) = SynExpr.Upcast (e, ty, range0)
-
-    let synBindingTriviaZero (isMember : bool) =
-        {
-            SynBindingTrivia.EqualsRange = Some range0
-            InlineKeyword = None
-            LeadingKeyword =
-                if isMember then
-                    SynLeadingKeyword.Member range0
-                else
-                    SynLeadingKeyword.Let range0
-        }
-
-    /// {ident} - {rhs}
-    let minus (ident : SynLongIdent) (rhs : SynExpr) : SynExpr =
-        SynExpr.CreateApp (
-            SynExpr.CreateAppInfix (
-                SynExpr.CreateLongIdent (
-                    SynLongIdent.SynLongIdent (
-                        [ Ident.Create "op_Subtraction" ],
-                        [],
-                        [ Some (IdentTrivia.OriginalNotation "-") ]
-                    )
-                ),
-                SynExpr.CreateLongIdent ident
-            ),
-            rhs
-        )
-
-    /// {ident} - {n}
-    let minusN (ident : SynLongIdent) (n : int) : SynExpr =
-        minus ident (SynExpr.CreateConst (SynConst.Int32 n))
-
-    /// {y} > {x}
-    let greaterThan (x : SynExpr) (y : SynExpr) : SynExpr =
-        SynExpr.CreateApp (
-            SynExpr.CreateAppInfix (
-                SynExpr.CreateLongIdent (
-                    SynLongIdent.SynLongIdent (
-                        [ Ident.Create "op_GreaterThan" ],
-                        [],
-                        [ Some (IdentTrivia.OriginalNotation ">") ]
-                    )
-                ),
-                y
-            ),
-            x
-        )
--- a/WoofWare.Myriad.Plugins/SynType.fs
+++ b/WoofWare.Myriad.Plugins/SynType.fs
@@ -1,10 +0,0 @@
-namespace WoofWare.Myriad.Plugins
-
-open Fantomas.FCS.Syntax
-
-[<RequireQualifiedAccess>]
-module internal SynType =
-    let rec stripOptionalParen (ty : SynType) : SynType =
-        match ty with
-        | SynType.Paren (ty, _) -> stripOptionalParen ty
-        | ty -> ty
--- a/Show More
+++ b/Show More