catalog: add wireframe extension

Adds https://github.com/TortoiseWolfe/spec-kit-extension-wireframe
(v0.1.0) to the community catalog. Provides a visual feedback loop
for spec-driven development: SVG wireframe generation, review, and
sign-off. Approved wireframes become spec constraints honored by
/plan, /tasks, and /implement.

Supersedes #1410 — the old PR predated the extension system
introduced in #2130 and proposed commands in templates/commands/,
which is no longer the right home for third-party commands.

Author: TurtleWolfe

extensions/catalog.community.json

@@ -2246,6 +2246,41 @@
       "stars": 0,
       "created_at": "2026-04-13T00:00:00Z",
       "updated_at": "2026-04-13T00:00:00Z"
+    },
+    "wireframe": {
+      "name": "Wireframe Visual Feedback Loop",
+      "id": "wireframe",
+      "description": "SVG wireframe generation, review, and sign-off for spec-driven development. Approved wireframes become spec constraints honored by /plan, /tasks, and /implement.",
+      "author": "TortoiseWolfe (turtlewolfe.com)",
+      "version": "0.1.0",
+      "download_url": "https://github.com/TortoiseWolfe/spec-kit-extension-wireframe/archive/refs/tags/v0.1.0.zip",
+      "repository": "https://github.com/TortoiseWolfe/spec-kit-extension-wireframe",
+      "homepage": "https://github.com/TortoiseWolfe/spec-kit-extension-wireframe",
+      "documentation": "https://github.com/TortoiseWolfe/spec-kit-extension-wireframe/blob/main/README.md",
+      "changelog": "https://github.com/TortoiseWolfe/spec-kit-extension-wireframe/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.6.0"
+      },
+      "provides": {
+        "commands": 6,
+        "hooks": 3
+      },
+      "tags": [
+        "wireframe",
+        "visual",
+        "design",
+        "ui",
+        "mockup",
+        "svg",
+        "feedback-loop",
+        "sign-off"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-04-17T00:00:00Z",
+      "updated_at": "2026-04-17T00:00:00Z"
     }
   }
 }