Add Time Machine extension to community catalog (#2580)

* Add Time Machine extension to community catalog

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

Closes #2568

* Fix alphabetical ordering of time-machine entry

Move time-machine before tinyspec in both catalog JSON (by ID)
and docs table (by name), since time < tiny alphabetically.

Author: mnriem

docs/community/extensions.md

@@ -110,6 +110,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Status Report | Project status, feature progress, and next-action recommendations for spec-driven workflows | `visibility` | Read-only | [Open-Agent-Tools/spec-kit-status](https://github.com/Open-Agent-Tools/spec-kit-status) |
 | Superpowers Bridge | Orchestrates obra/superpowers skills within the spec-kit SDD workflow across the full lifecycle (clarification, TDD, review, verification, critique, debugging, branch completion) | `process` | Read+Write | [superpowers-bridge](https://github.com/RbBtSn0w/spec-kit-extensions/tree/main/superpowers-bridge) |
 | Superpowers Bridge (WangX0111) | Bridges spec-kit with obra/superpowers (brainstorming, TDD, subagent, code-review) into a unified, resumable workflow with graceful degradation and session progress tracking | `process` | Read+Write | [superspec](https://github.com/WangX0111/superspec) |
+| Time Machine | Retroactively apply the full SDD workflow to existing codebases — analyse, spec, and ship feature-by-feature | `process` | Read+Write | [spec-kit-time-machine](https://github.com/teeyo/spec-kit-time-machine) |
 | TinySpec | Lightweight single-file workflow for small tasks — skip the heavy multi-step SDD process | `process` | Read+Write | [spec-kit-tinyspec](https://github.com/Quratulain-bilal/spec-kit-tinyspec) |
 | Token Consumption Analyzer | Captures, analyzes, and compares token consumption across SDD workflows | `visibility` | Read-only | [spec-kit-token-analyzer](https://github.com/coderandhiker/spec-kit-token-analyzer) |
 | V-Model Extension Pack | Enforces V-Model paired generation of development specs and test specs with full traceability | `docs` | Read+Write | [spec-kit-v-model](https://github.com/leocamello/spec-kit-v-model) |

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-05-14T00:00:00Z",
+  "updated_at": "2026-05-15T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -2885,6 +2885,43 @@
       "created_at": "2026-03-02T00:00:00Z",
       "updated_at": "2026-03-02T00:00:00Z"
     },
+    "time-machine": {
+      "name": "Time Machine",
+      "id": "time-machine",
+      "description": "Retroactively apply the full SDD workflow to existing codebases — analyse, spec, and ship feature-by-feature",
+      "author": "te3yo",
+      "version": "1.1.0",
+      "download_url": "https://github.com/teeyo/spec-kit-time-machine/archive/refs/tags/v1.1.0.zip",
+      "repository": "https://github.com/teeyo/spec-kit-time-machine",
+      "homepage": "https://github.com/teeyo/spec-kit-time-machine",
+      "documentation": "https://github.com/teeyo/spec-kit-time-machine",
+      "changelog": "https://github.com/teeyo/spec-kit-time-machine/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0",
+        "tools": [
+          {
+            "name": "git",
+            "required": true
+          }
+        ]
+      },
+      "provides": {
+        "commands": 3,
+        "hooks": 1
+      },
+      "tags": [
+        "brownfield",
+        "automation",
+        "workflow",
+        "process"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-05-15T00:00:00Z",
+      "updated_at": "2026-05-15T00:00:00Z"
+    },
     "tinyspec": {
       "name": "TinySpec",
       "id": "tinyspec",