Add Evaluator Contract extension to community catalog (#4420)

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

Closes #4414

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Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: github-actions[bot]

docs/community/extensions.md

@@ -67,6 +67,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Dotdog | Import GitHub Spec Kit artifacts into local knowledge graphs for validation, analysis, search, and MCP queries. | `docs` | Read+Write | [dotdog](https://github.com/specdog/dotdog) |
 | DUBSAR Memory | Local project memory for Spec Kit with explicit checkpoints, cross-session resume, and SHA-256 freshness for recorded specification, plan, and task references. | `visibility` | Read+Write | [dubsar-memory](https://github.com/kotnisofiane-bit/dubsar-memory) |
 | EARS Requirements Syntax | Author, lint, and convert requirements using EARS - the five industry-standard sentence patterns for unambiguous, testable requirements | `docs` | Read+Write | [spec-kit-ears](https://github.com/dhruv-15-03/spec-kit-ears) |
+| Evaluator Contract | Provider-neutral evaluator contract for evidence, provenance, uncertainty, and recovery across Spec-Driven Development phases. | `process` | Read+Write | [spec-kit-evaluator](https://github.com/electrohire/spec-kit-evaluator) |
 | Extensify | Create and validate extensions and extension catalogs | `process` | Read+Write | [extensify](https://github.com/mnriem/spec-kit-extensions/tree/main/extensify) |
 | Figma Starter | Turns a Figma section's screens into per-screen spec.md files, an app-level user-stories.md, and a build-order.md, then hands off to /speckit.specify | `integration` | Read+Write | [spec-kit-figma-starter](https://github.com/wavemaker/spec-kit-figma-starter) |
 | Fix Findings | Automated analyze-fix-reanalyze loop that resolves spec findings until clean | `code` | Read+Write | [spec-kit-fix-findings](https://github.com/Quratulain-bilal/spec-kit-fix-findings) |

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-09-02T00:00:00Z",
+  "updated_at": "2026-09-03T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "adrkit": {
@@ -1785,6 +1785,40 @@
       "created_at": "2026-07-08T00:00:00Z",
       "updated_at": "2026-07-08T00:00:00Z"
     },
+    "evaluator": {
+      "name": "Evaluator Contract",
+      "id": "evaluator",
+      "description": "Provider-neutral evaluator contract for evidence, provenance, uncertainty, and recovery across Spec-Driven Development phases.",
+      "author": "ElectroHire",
+      "version": "1.0.0",
+      "download_url": "https://github.com/electrohire/spec-kit-evaluator/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/electrohire/spec-kit-evaluator",
+      "homepage": "https://github.com/electrohire/spec-kit-evaluator",
+      "documentation": "https://github.com/electrohire/spec-kit-evaluator/blob/main/README.md",
+      "changelog": "https://github.com/electrohire/spec-kit-evaluator/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=1.0.0"
+      },
+      "provides": {
+        "commands": 4,
+        "hooks": 4
+      },
+      "tags": [
+        "evaluator",
+        "evidence",
+        "provenance",
+        "quality",
+        "governance"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-09-03T00:00:00Z",
+      "updated_at": "2026-09-03T00:00:00Z"
+    },
     "extensify": {
       "name": "Extensify",
       "id": "extensify",