Add ProductShape PRODUCT workflows extension to community catalog

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

Closes #4453

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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docs/community/extensions.md

@@ -119,6 +119,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Presetify | Create and validate presets and preset catalogs | `process` | Read+Write | [presetify](https://github.com/mnriem/spec-kit-extensions/tree/main/presetify) |
 | Product Forge | Full product-lifecycle orchestrator for Spec Kit: research → product-spec → plan → tasks → implement → verify → test → release-readiness, across express/lite/standard/v-model modes with human-in-the-loop gates. | `process` | Read+Write | [speckit-product-forge](https://github.com/VaiYav/speckit-product-forge) |
 | Product Spec Extension | Generates PRFAQ, Lean PRD, stakeholder summaries, and technical designs from engineering specs | `docs` | Read+Write | [spec-kit-product](https://github.com/d0whc3r/spec-kit-product) |
+| ProductShape PRODUCT workflows | Author, refine, validate, apply, archive and recover ProductShape product meaning in a separate Spec Kit lane. | `process` | Read+Write | [productshape](https://github.com/juangcarmona/productshape) |
 | Project Health Check | Diagnose a Spec Kit project and report health issues across structure, agents, features, scripts, extensions, and git | `visibility` | Read-only | [spec-kit-doctor](https://github.com/KhawarHabibKhan/spec-kit-doctor) |
 | Project Status | Show current SDD workflow progress — active feature, artifact status, task completion, workflow phase, and extensions summary | `visibility` | Read-only | [spec-kit-status](https://github.com/KhawarHabibKhan/spec-kit-status) |
 | QA Testing Extension | Systematic QA testing with browser-driven or CLI-based validation of acceptance criteria from spec | `code` | Read-only | [spec-kit-qa](https://github.com/arunt14/spec-kit-qa) |

extensions/catalog.community.json

@@ -3675,6 +3675,46 @@
       "created_at": "2026-08-17T00:00:00Z",
       "updated_at": "2026-08-17T00:00:00Z"
     },
+    "pdac-product": {
+      "name": "ProductShape PRODUCT workflows",
+      "id": "pdac-product",
+      "description": "Author, refine, validate, apply, archive and recover ProductShape product meaning in a separate Spec Kit lane.",
+      "author": "Juan G. Carmona (@juangcarmona)",
+      "version": "0.1.0",
+      "download_url": "https://github.com/juangcarmona/productshape/releases/download/speckit-pdac-product-v0.1.0/speckit-pdac-product.zip",
+      "repository": "https://github.com/juangcarmona/productshape",
+      "homepage": "https://pdac.dev",
+      "documentation": "https://github.com/juangcarmona/productshape/blob/main/extensions/speckit-pdac-product/README.md",
+      "changelog": "https://github.com/juangcarmona/productshape/blob/main/extensions/speckit-pdac-product/CHANGELOG.md",
+      "license": "Apache-2.0",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=1.0.4",
+        "tools": [
+          {
+            "name": "prodshape",
+            "version": ">=0.19.0",
+            "required": true
+          }
+        ]
+      },
+      "provides": {
+        "commands": 6,
+        "hooks": 0
+      },
+      "tags": [
+        "product",
+        "product-change",
+        "recovery",
+        "pdac"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-09-08T00:00:00Z",
+      "updated_at": "2026-09-08T00:00:00Z"
+    },
     "plan-review-gate": {
       "name": "Plan Review Gate",
       "id": "plan-review-gate",