Add PR Bridge extension to community catalog (#2148)

- 3 commands: generate PR descriptions, reviewer checklists, and change summaries
- 1 hook: after_implement for auto-generating PR description
- Closes the SDD workflow loop: specify → plan → tasks → implement → PR

extensions/catalog.community.json

@@ -1030,6 +1030,38 @@
       "created_at": "2026-03-27T08:22:30Z",
       "updated_at": "2026-03-27T08:22:30Z"
     },
+    "pr-bridge": {
+      "name": "PR Bridge",
+      "id": "pr-bridge",
+      "description": "Auto-generate pull request descriptions, checklists, and summaries from spec artifacts.",
+      "author": "Quratulain-bilal",
+      "version": "1.0.0",
+      "download_url": "https://github.com/Quratulain-bilal/spec-kit-pr-bridge-/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/Quratulain-bilal/spec-kit-pr-bridge-",
+      "homepage": "https://github.com/Quratulain-bilal/spec-kit-pr-bridge-",
+      "documentation": "https://github.com/Quratulain-bilal/spec-kit-pr-bridge-/blob/main/README.md",
+      "changelog": "https://github.com/Quratulain-bilal/spec-kit-pr-bridge-/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.4.0"
+      },
+      "provides": {
+        "commands": 3,
+        "hooks": 1
+      },
+      "tags": [
+        "pull-request",
+        "automation",
+        "traceability",
+        "workflow",
+        "review"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-04-10T00:00:00Z",
+      "updated_at": "2026-04-10T00:00:00Z"
+    },
     "presetify": {
       "name": "Presetify",
       "id": "presetify",