[extension] Add Spec-Kit BDD extension to community catalog (#3548)

* Add Spec-Kit BDD extension to community catalog

Add bdd extension submitted by @RSginer to:
- extensions/catalog.community.json (alphabetical order)
- docs/community/extensions.md community extensions table

Closes #3546

Assisted-by: GitHub Copilot (model: claude-sonnet-4.6, autonomous)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(catalog): add optional BDD framework tools to bdd extension entry

Add the six optional tool dependencies submitted with the bdd extension
to the requires.tools field so they appear in CLI extension details:
pytest-bdd, behave, @cucumber/cucumber, cucumber, io.cucumber, SpecFlow

Assisted-by: GitHub Copilot (model: claude-sonnet-4.5, autonomous)

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

docs/community/extensions.md

@@ -134,6 +134,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Spec Sync | Detect and resolve drift between specs and implementation. AI-assisted resolution with human approval | `docs` | Read+Write | [spec-kit-sync](https://github.com/bgervin/spec-kit-sync) |
 | Spec Trace | Build a requirement → test traceability matrix from spec.md and the test suite — surface untested requirements and orphan tests | `code` | Read+Write | [spec-kit-trace](https://github.com/Quratulain-bilal/spec-kit-trace) |
 | Spec Validate | Comprehension validation, review gating, and approval state for spec-kit artifacts — staged quizzes, peer review SLA, and a hard gate before /speckit.implement | `process` | Read+Write | [spec-kit-spec-validate](https://github.com/aeltayeb/spec-kit-spec-validate) |
+| Spec-Kit BDD | ATDD/BDD extension: convert specs to Gherkin scenarios, scaffold step definitions, and verify acceptance test coverage | `process` | Read+Write | [spec-kit-bdd](https://github.com/RSginer/spec-kit-bdd) |
 | Spec2Cloud | Spec-driven workflow tuned for shipping to Azure | `process` | Read+Write | [spec2cloud](https://github.com/Azure-Samples/Spec2Cloud) |
 | SpecKit Companion | Live spec-driven progress — lifecycle capture, status, resume, and a turbo pipeline profile | `visibility` | Read+Write | [speckit-companion](https://github.com/alfredoperez/speckit-companion) |
 | SpecTest | Auto-generate test scaffolds from spec criteria, map coverage, and find untested requirements | `code` | Read+Write | [spec-kit-spectest](https://github.com/Quratulain-bilal/spec-kit-spectest) |

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-07-15T00:00:00Z",
+  "updated_at": "2026-07-15T14:10:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -395,6 +395,66 @@
       "created_at": "2026-03-03T00:00:00Z",
       "updated_at": "2026-03-03T00:00:00Z"
     },
+    "bdd": {
+      "name": "Spec-Kit BDD",
+      "id": "bdd",
+      "description": "ATDD/BDD extension: convert specs to Gherkin scenarios, scaffold step definitions, and verify acceptance test coverage.",
+      "author": "RSginer",
+      "version": "1.0.2",
+      "download_url": "https://github.com/RSginer/spec-kit-bdd/archive/refs/tags/v1.0.2.zip",
+      "repository": "https://github.com/RSginer/spec-kit-bdd",
+      "homepage": "https://github.com/RSginer/spec-kit-bdd",
+      "documentation": "https://github.com/RSginer/spec-kit-bdd/blob/main/docs/usage.md",
+      "changelog": "https://github.com/RSginer/spec-kit-bdd/releases",
+      "license": "MIT",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=0.2.0",
+        "tools": [
+          {
+            "name": "pytest-bdd",
+            "required": false
+          },
+          {
+            "name": "behave",
+            "required": false
+          },
+          {
+            "name": "@cucumber/cucumber",
+            "required": false
+          },
+          {
+            "name": "cucumber",
+            "required": false
+          },
+          {
+            "name": "io.cucumber",
+            "required": false
+          },
+          {
+            "name": "SpecFlow",
+            "required": false
+          }
+        ]
+      },
+      "provides": {
+        "commands": 3,
+        "hooks": 2
+      },
+      "tags": [
+        "bdd",
+        "gherkin",
+        "atdd",
+        "acceptance-testing",
+        "tdd"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-07-15T00:00:00Z",
+      "updated_at": "2026-07-15T00:00:00Z"
+    },
     "blueprint": {
       "name": "Blueprint",
       "id": "blueprint",