Add Spec Scope extension to community catalog

Adds spec-kit-scope: effort estimation and scope tracking from spec artifacts.

4 commands:
- /speckit.scope.estimate — data-driven effort estimation with three-point ranges
- /speckit.scope.compare — side-by-side spec scope comparison
- /speckit.scope.creep — scope creep detection via git history
- /speckit.scope.budget — sprint-ready time budget generation

1 hook: after_specify (auto-estimation)

Turns "how long will this take?" into a data-driven answer.

Author: Quratulain-bilal

README.md

@@ -231,6 +231,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Spec Critique Extension | Dual-lens critical review of spec and plan from product strategy and engineering risk perspectives | `docs` | Read-only | [spec-kit-critique](https://github.com/arunt14/spec-kit-critique) |
 | Spec Diagram | Auto-generate Mermaid diagrams of SDD workflow state, feature progress, and task dependencies | `visibility` | Read-only | [spec-kit-diagram-](https://github.com/Quratulain-bilal/spec-kit-diagram-) |
 | Spec Refine | Update specs in-place, propagate changes to plan and tasks, and diff impact across artifacts | `process` | Read+Write | [spec-kit-refine](https://github.com/Quratulain-bilal/spec-kit-refine) |
+| Spec Scope | Effort estimation and scope tracking — estimate work, detect creep, and budget time per phase | `process` | Read-only | [spec-kit-scope-](https://github.com/Quratulain-bilal/spec-kit-scope-) |
 | Spec Sync | Detect and resolve drift between specs and implementation. AI-assisted resolution with human approval | `docs` | Read+Write | [spec-kit-sync](https://github.com/bgervin/spec-kit-sync) |
 | SpecTest | Auto-generate test scaffolds from spec criteria, map coverage, and find untested requirements | `code` | Read+Write | [spec-kit-spectest](https://github.com/Quratulain-bilal/spec-kit-spectest) |
 | Staff Review Extension | Staff-engineer-level code review that validates implementation against spec, checks security, performance, and test coverage | `code` | Read-only | [spec-kit-staff-review](https://github.com/arunt14/spec-kit-staff-review) |

extensions/catalog.community.json

@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-04-10T17:00:00Z",
+  "updated_at": "2026-04-11T10:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "aide": {
@@ -1489,6 +1489,39 @@
       "created_at": "2026-04-03T03:24:03Z",
       "updated_at": "2026-04-03T04:15:00Z"
     },
+    "scope": {
+      "name": "Spec Scope",
+      "id": "scope",
+      "description": "Effort estimation and scope tracking — estimate work, detect creep, and budget time per phase.",
+      "author": "Quratulain-bilal",
+      "version": "1.0.0",
+      "download_url": "https://github.com/Quratulain-bilal/spec-kit-scope-/archive/refs/tags/v1.0.0.zip",
+      "repository": "https://github.com/Quratulain-bilal/spec-kit-scope-",
+      "homepage": "https://github.com/Quratulain-bilal/spec-kit-scope-",
+      "documentation": "https://github.com/Quratulain-bilal/spec-kit-scope-/blob/main/README.md",
+      "changelog": "https://github.com/Quratulain-bilal/spec-kit-scope-/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.4.0"
+      },
+      "provides": {
+        "commands": 4,
+        "hooks": 1
+      },
+      "tags": [
+        "estimation",
+        "scope",
+        "effort",
+        "planning",
+        "project-management",
+        "tracking"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-04-11T10:00:00Z",
+      "updated_at": "2026-04-11T10:00:00Z"
+    },
     "ship": {
       "name": "Ship Release Extension",
       "id": "ship",