code · pull · May 13, 2026 · May 13, 2026 · May 13, 2026 · May 13, 2026
diff --git a/.github/workflows/dependabot.yml b/.github/workflows/dependabot.yml
@@ -20,7 +20,7 @@ jobs:
     steps:
       - name: Dependabot metadata
         id: metadata
-        uses: dependabot/fetch-metadata@v2
+        uses: dependabot/fetch-metadata@v3
         with:
           github-token: "${{ secrets.GITHUB_TOKEN }}"
       - name: Enable auto-merge for Dependabot PRs

diff --git a/.github/workflows/seed.yml b/.github/workflows/seed.yml
@@ -1791,7 +1791,7 @@ jobs:
 
       - name: Post to PostHog
         # https://github.com/PostHog/posthog-github-action
-        uses: PostHog/posthog-github-action@v0.1
+        uses: PostHog/posthog-github-action@v1
         with:
           posthog-token: ${{ secrets.POSTHOG_API_KEY }}
           event: "gh-actions-seed-test-metrics-event"

diff --git a/.github/workflows/update-seed.yml b/.github/workflows/update-seed.yml
@@ -992,7 +992,7 @@ jobs:
       # Commit all applied patches back to branch (will be checked out in apply-patches step)
       - name: Add and Commit Changes
         id: commit-changes
-        uses: EndBug/add-and-commit@v9
+        uses: EndBug/add-and-commit@v10
         if: ${{ steps.apply-patches.outputs.has-patches == 'true' }}
         with:
           add: "seed/*"

diff --git a/generators/csharp/base/src/asIs/test/Template.Test.csproj b/generators/csharp/base/src/asIs/test/Template.Test.csproj
@@ -26,7 +26,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="WireMock.Net" Version="2.2.0" />
+        <PackageReference Include="WireMock.Net" Version="2.6.0" />
     </ItemGroup>
 
     <ItemGroup>

diff --git a/generators/csharp/sdk/changes/2.66.3/bump-wiremock-net-to-2-6-0.yml b/generators/csharp/sdk/changes/2.66.3/bump-wiremock-net-to-2-6-0.yml
@@ -0,0 +1,4 @@
+- summary: |
+    Bump WireMock.Net from 2.2.0 to 2.6.0 in generated test projects to resolve Snyk
+    vulnerability reports flagging the older version.
+  type: fix
diff --git a/generators/csharp/sdk/versions.yml b/generators/csharp/sdk/versions.yml
@@ -1,4 +1,12 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 2.66.3
+  changelogEntry:
+    - summary: |
+        Bump WireMock.Net from 2.2.0 to 2.6.0 in generated test projects to resolve Snyk
+        vulnerability reports flagging the older version.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 2.66.2
   changelogEntry:
     - summary: |

diff --git a/generators/go-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts b/generators/go-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts
@@ -71,7 +71,7 @@ export class WireTestSetupGenerator {
       - "0:8080"
     volumes:
       - ./wiremock-mappings.json:/home/wiremock/mappings/wiremock-mappings.json
-    command: ["--global-response-templating", "--verbose"]
+    command: ["--verbose"]
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 2s

diff --git a/generators/go/sdk/changes/1.41.2/drop-wiremock-global-response-templating.yml b/generators/go/sdk/changes/1.41.2/drop-wiremock-global-response-templating.yml
@@ -0,0 +1,9 @@
+# yaml-language-server: $schema=../../../../../fern-changes-yml.schema.json
+
+- summary: |
+    Stop launching WireMock with `--global-response-templating` in generated
+    wire-test `docker-compose.test.yml`. Response examples containing literal
+    `{{...}}` are now served verbatim instead of being passed through
+    WireMock's Handlebars transformer, which would fail to resolve them as
+    helpers and return 500.
+  type: fix
diff --git a/generators/go/sdk/versions.yml b/generators/go/sdk/versions.yml
@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 1.41.2
+  changelogEntry:
+    - summary: |
+        Stop launching WireMock with `--global-response-templating` in generated
+        wire-test `docker-compose.test.yml`. Response examples containing literal
+        `{{...}}` are now served verbatim instead of being passed through
+        WireMock's Handlebars transformer, which would fail to resolve them as
+        helpers and return 500.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 1.41.1
   changelogEntry:
     - summary: |

diff --git a/generators/php/sdk/changes/2.9.6/drop-wiremock-global-response-templating.yml b/generators/php/sdk/changes/2.9.6/drop-wiremock-global-response-templating.yml
@@ -0,0 +1,9 @@
+# yaml-language-server: $schema=../../../../../fern-changes-yml.schema.json
+
+- summary: |
+    Stop launching WireMock with `--global-response-templating` in generated
+    wire-test `docker-compose.test.yml`. Response examples containing literal
+    `{{...}}` are now served verbatim instead of being passed through
+    WireMock's Handlebars transformer, which would fail to resolve them as
+    helpers and return 500.
+  type: fix
diff --git a/generators/php/sdk/src/wire-tests/WireTestSetupGenerator.ts b/generators/php/sdk/src/wire-tests/WireTestSetupGenerator.ts
@@ -108,7 +108,7 @@ export class WireTestSetupGenerator {
       - "0:8080"  # Use dynamic port to avoid conflicts with concurrent tests
     volumes:
       - ./wiremock-mappings.json:/home/wiremock/mappings/wiremock-mappings.json
-    command: ["--global-response-templating", "--verbose"]
+    command: ["--verbose"]
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 2s

diff --git a/generators/php/sdk/versions.yml b/generators/php/sdk/versions.yml
@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 2.9.6
+  changelogEntry:
+    - summary: |
+        Stop launching WireMock with `--global-response-templating` in generated
+        wire-test `docker-compose.test.yml`. Response examples containing literal
+        `{{...}}` are now served verbatim instead of being passed through
+        WireMock's Handlebars transformer, which would fail to resolve them as
+        helpers and return 500.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 2.9.5
   changelogEntry:
     - summary: |

diff --git a/generators/python-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts b/generators/python-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts
@@ -205,7 +205,7 @@ export class WireTestSetupGenerator {
       - "0:8080"  # Use dynamic port to avoid conflicts with concurrent tests
     volumes:
       - ./wiremock-mappings.json:/home/wiremock/mappings/wiremock-mappings.json
-    command: ["--global-response-templating", "--verbose"]
+    command: ["--verbose"]
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 2s

diff --git a/generators/python/sdk/changes/5.12.6/drop-wiremock-global-response-templating.yml b/generators/python/sdk/changes/5.12.6/drop-wiremock-global-response-templating.yml
@@ -0,0 +1,9 @@
+# yaml-language-server: $schema=../../../../../fern-changes-yml.schema.json
+
+- summary: |
+    Stop launching WireMock with `--global-response-templating` in generated
+    wire-test `docker-compose.test.yml`. Response examples containing literal
+    `{{...}}` (e.g. FHIR/IPS template strings) are now served verbatim instead
+    of being passed through WireMock's Handlebars transformer, which would
+    fail to resolve them as helpers and return 500.
+  type: fix
diff --git a/generators/python/sdk/versions.yml b/generators/python/sdk/versions.yml
@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 5.12.6
+  changelogEntry:
+    - summary: |
+        Stop launching WireMock with `--global-response-templating` in generated
+        wire-test `docker-compose.test.yml`. Response examples containing literal
+        `{{...}}` (e.g. FHIR/IPS template strings) are now served verbatim instead
+        of being passed through WireMock's Handlebars transformer, which would
+        fail to resolve them as helpers and return 500.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 5.12.5
   changelogEntry:
     - summary: |

diff --git a/generators/ruby-v2/sdk/changes/1.12.9/drop-wiremock-global-response-templating.yml b/generators/ruby-v2/sdk/changes/1.12.9/drop-wiremock-global-response-templating.yml
@@ -0,0 +1,9 @@
+# yaml-language-server: $schema=../../../../../fern-changes-yml.schema.json
+
+- summary: |
+    Stop launching WireMock with `--global-response-templating` in generated
+    wire-test `docker-compose.test.yml`. Response examples containing literal
+    `{{...}}` are now served verbatim instead of being passed through
+    WireMock's Handlebars transformer, which would fail to resolve them as
+    helpers and return 500.
+  type: fix
diff --git a/generators/ruby-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts b/generators/ruby-v2/sdk/src/wire-tests/WireTestSetupGenerator.ts
@@ -222,7 +222,7 @@ export class WireTestSetupGenerator {
       - "0:8080"  # Use dynamic port to avoid conflicts with concurrent tests
     volumes:
       - ./wiremock-mappings.json:/home/wiremock/mappings/wiremock-mappings.json
-    command: ["--global-response-templating", "--verbose"]
+    command: ["--verbose"]
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 2s

diff --git a/generators/ruby-v2/sdk/versions.yml b/generators/ruby-v2/sdk/versions.yml
@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 1.12.9
+  changelogEntry:
+    - summary: |
+        Stop launching WireMock with `--global-response-templating` in generated
+        wire-test `docker-compose.test.yml`. Response examples containing literal
+        `{{...}}` are now served verbatim instead of being passed through
+        WireMock's Handlebars transformer, which would fail to resolve them as
+        helpers and return 500.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 1.12.8
   changelogEntry:
     - summary: |

diff --git a/generators/rust/sdk/changes/0.36.7/drop-wiremock-global-response-templating.yml b/generators/rust/sdk/changes/0.36.7/drop-wiremock-global-response-templating.yml
@@ -0,0 +1,9 @@
+# yaml-language-server: $schema=../../../../../fern-changes-yml.schema.json
+
+- summary: |
+    Stop launching WireMock with `--global-response-templating` in generated
+    wire-test `docker-compose.test.yml`. Response examples containing literal
+    `{{...}}` are now served verbatim instead of being passed through
+    WireMock's Handlebars transformer, which would fail to resolve them as
+    helpers and return 500.
+  type: fix
diff --git a/generators/rust/sdk/src/wire-tests/WireTestSetupGenerator.ts b/generators/rust/sdk/src/wire-tests/WireTestSetupGenerator.ts
@@ -275,7 +275,7 @@ export class WireTestSetupGenerator {
       - "0:8080"  # Use dynamic port to avoid conflicts with concurrent tests
     volumes:
       - ./wiremock-mappings.json:/home/wiremock/mappings/wiremock-mappings.json
-    command: ["--global-response-templating", "--verbose"]
+    command: ["--verbose"]
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/__admin/health"]
       interval: 2s

diff --git a/generators/rust/sdk/versions.yml b/generators/rust/sdk/versions.yml
@@ -1,4 +1,15 @@
 # yaml-language-server: $schema=../../../fern-versions-yml.schema.json
+- version: 0.36.7
+  changelogEntry:
+    - summary: |
+        Stop launching WireMock with `--global-response-templating` in generated
+        wire-test `docker-compose.test.yml`. Response examples containing literal
+        `{{...}}` are now served verbatim instead of being passed through
+        WireMock's Handlebars transformer, which would fail to resolve them as
+        helpers and return 500.
+      type: fix
+  createdAt: "2026-05-13"
+  irVersion: 66
 - version: 0.36.6
   changelogEntry:
     - summary: |

diff --git a/packages/cli/api-importers/openapi/openapi-ir-parser/src/schema/convertSchemas.ts b/packages/cli/api-importers/openapi/openapi-ir-parser/src/schema/convertSchemas.ts
@@ -1335,13 +1335,18 @@ export function convertSchemaObject(
 
             // Now that we've handled the single-element allOf case, filter the
             // allOfs down to just the objects.
-            const filteredAllOfObjects = filteredAllOfs.filter((allOf) => {
-                const valid = isValidAllOfObject(allOf);
-                if (!valid) {
+            const filteredAllOfObjects: (OpenAPIV3.SchemaObject | OpenAPIV3.ReferenceObject)[] = [];
+            const filteredOutPrimitiveElements: OpenAPIV3.SchemaObject[] = [];
+            for (const allOf of filteredAllOfs) {
+                if (isValidAllOfObject(allOf)) {
+                    filteredAllOfObjects.push(allOf);
+                } else {
                     context.logger.debug(`Skipping non-object allOf element: ${JSON.stringify(allOf)}`);
+                    if (!isReferenceObject(allOf)) {
+                        filteredOutPrimitiveElements.push(allOf);
+                    }
                 }
-                return valid;
-            });
+            }
 
             if (
                 (schema.properties == null || hasNoProperties(schema)) &&
@@ -1351,8 +1356,22 @@ export function convertSchemaObject(
             ) {
                 // Try to short-circuit again.
                 // We don't short-circuit if additionalProperties is set, as we'd lose that information.
+                // Before short-circuiting, merge any constraints from filtered-out primitive
+                // allOf elements (e.g. pattern, format, minLength) into the remaining element.
+                let elementToConvert: OpenAPIV3.SchemaObject | OpenAPIV3.ReferenceObject = filteredAllOfObjects[0];
+                if (filteredOutPrimitiveElements.length > 0) {
+                    // Merge all fields from filtered-out elements into the remaining
+                    // schema. Later elements win (standard allOf semantics).
+                    const base = isReferenceObject(elementToConvert)
+                        ? { ...context.resolveSchemaReference(elementToConvert) }
+                        : { ...elementToConvert };
+                    for (const primitiveElement of filteredOutPrimitiveElements) {
+                        Object.assign(base, primitiveElement);
+                    }
+                    elementToConvert = base;
+                }
                 const convertedSchema = convertSchema(
-                    filteredAllOfObjects[0],
+                    elementToConvert,
                     wrapAsOptional,
                     wrapAsNullable,
                     context,

diff --git a/...-ir-to-fern-tests/src/__test__/__snapshots__/openapi-ir/allof-oneof-anyof-edge-cases.json b/...-ir-to-fern-tests/src/__test__/__snapshots__/openapi-ir/allof-oneof-anyof-edge-cases.json
@@ -1060,13 +1060,29 @@
               "generatedName": "RuleConfigExecutionContext",
               "value": {
                 "generatedName": "RuleConfigExecutionContext",
-                "schema": "RuleExecutionContext",
+                "values": [
+                  {
+                    "generatedName": "prod",
+                    "value": "prod",
+                    "casing": {}
+                  },
+                  {
+                    "generatedName": "staging",
+                    "value": "staging",
+                    "casing": {}
+                  },
+                  {
+                    "generatedName": "dev",
+                    "value": "dev",
+                    "casing": {}
+                  }
+                ],
                 "groupName": [],
                 "source": {
                   "file": "../openapi.yml",
                   "type": "openapi"
                 },
-                "type": "reference"
+                "type": "enum"
               },
               "groupName": [],
               "type": "optional"

diff --git a/...api-ir-to-fern-tests/src/__test__/__snapshots__/openapi/allof-oneof-anyof-edge-cases.json b/...api-ir-to-fern-tests/src/__test__/__snapshots__/openapi/allof-oneof-anyof-edge-cases.json
@@ -350,13 +350,24 @@
             "docs": undefined,
             "inline": undefined,
             "properties": {
-              "executionContext": "optional<RuleExecutionContext>",
+              "executionContext": "optional<RuleConfigExecutionContext>",
               "name": "optional<string>",
             },
             "source": {
               "openapi": "../openapi.yml",
             },
           },
+          "RuleConfigExecutionContext": {
+            "enum": [
+              "prod",
+              "staging",
+              "dev",
+            ],
+            "inline": true,
+            "source": {
+              "openapi": "../openapi.yml",
+            },
+          },
           "RuleExecutionContext": {
             "enum": [
               "prod",
@@ -588,10 +599,18 @@ types:
       - dev
     source:
       openapi: ../openapi.yml
+  RuleConfigExecutionContext:
+    enum:
+      - prod
+      - staging
+      - dev
+    inline: true
+    source:
+      openapi: ../openapi.yml
   RuleConfig:
     properties:
       name: optional<string>
-      executionContext: optional<RuleExecutionContext>
+      executionContext: optional<RuleConfigExecutionContext>
     source:
       openapi: ../openapi.yml
   PaginatedList: