Add Test Coverage Drift Control extension to community catalog (#3607)

Add test-coverage-drift-control extension submitted by @benizzio to:
- extensions/catalog.community.json (alphabetical order)
- docs/community/extensions.md community extensions table

Closes #3600

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
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docs/community/extensions.md

@@ -149,6 +149,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Superspec | 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) |
 | Tasks to GitHub Project | Publish and synchronize Spec Kit tasks as cards on a GitHub Project (v2) kanban board, with priority and status sync between spec.md/tasks.md and the board. | `integration` | Read+Write | [spec-kit-tasks-to-project](https://github.com/mancioshell/spec-kit-tasks-to-project) |
 | Team Assign | Assign tasks.md items to human engineers, split into subtasks, and generate a per-engineer workboard | `process` | Read+Write | [spec-kit-team-assign](https://github.com/tarunkumarbhati/spec-kit-team-assign) |
+| Test Coverage Drift Control | Generate incremental coverage drift reports and planned remediation tasks after implementation | `code` | Read+Write | [spec-kit-test-coverage-drift-control](https://github.com/benizzio/spec-kit-test-coverage-drift-control) |
 | 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 Budget | Reduces LLM token consumption in Spec Kit workflows: compact artifacts in-place, scope per-phase reading, suppress prose padding, and report token usage | `process` | Read+Write | [spec-kit-token-budget](https://github.com/tinesoft/spec-kit-token-budget) |

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-07-17T00:00:00Z",
+  "updated_at": "2026-07-21T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -4342,6 +4342,40 @@
       "created_at": "2026-05-20T00:00:00Z",
       "updated_at": "2026-05-20T00:00:00Z"
     },
+    "test-coverage-drift-control": {
+      "name": "Test Coverage Drift Control",
+      "id": "test-coverage-drift-control",
+      "description": "Generate incremental coverage drift reports and planned remediation tasks after implementation",
+      "author": "Igor Benicio de Mesquita",
+      "version": "0.3.0",
+      "download_url": "https://github.com/benizzio/spec-kit-test-coverage-drift-control/archive/refs/tags/v0.3.0.zip",
+      "repository": "https://github.com/benizzio/spec-kit-test-coverage-drift-control",
+      "homepage": "https://github.com/benizzio/spec-kit-test-coverage-drift-control",
+      "documentation": "https://github.com/benizzio/spec-kit-test-coverage-drift-control#readme",
+      "changelog": "https://github.com/benizzio/spec-kit-test-coverage-drift-control/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "category": "code",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=0.2.0"
+      },
+      "provides": {
+        "commands": 2,
+        "hooks": 1
+      },
+      "tags": [
+        "analysis",
+        "coverage",
+        "testing",
+        "quality",
+        "maintenance"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-07-21T00:00:00Z",
+      "updated_at": "2026-07-21T00:00:00Z"
+    },
     "time-machine": {
       "name": "Time Machine",
       "id": "time-machine",