diff --git a/docs/community/extensions.md b/docs/community/extensions.md
index 6ccea7da79..43734bbc16 100644
--- a/docs/community/extensions.md
+++ b/docs/community/extensions.md
@@ -113,6 +113,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | .NET Framework to Modern .NET Migration | Orchestrate end-to-end .NET Framework to modern .NET migration across 7 phases, with SDD lifecycle integration | `process` | Read+Write | [spec-kit-fx-to-net](https://github.com/RogerBestMsft/spec-kit-FxToNet) |
 | OKF Knowledge Bundle Generator | Generates and maintains an Open Knowledge Format (OKF v0.1) knowledge bundle from a source-code repository. Mines git history for the rationale behind the code, parks what it cannot establish as open questions rather than guessing, and verifies that the bundle's claims are actually supported by the repository. | `docs` | Read+Write | [catalogify](https://github.com/alexcpn/catalogify) |
 | Onboard | Contextual onboarding and progressive growth for developers new to spec-kit projects. Explains specs, maps dependencies, validates understanding, and guides the next step | `process` | Read+Write | [spec-kit-onboard](https://github.com/dmux/spec-kit-onboard) |
+| OpenSpec | Adds a spec-driven change-management workflow (propose → implement → verify → archive) to Spec Kit projects, keeping specs, designs, and code in sync | `process` | Read+Write | [spec-kit-openspec](https://github.com/aaronrsun/spec-kit-openspec) |
 | OpenUP Governed Lifecycle | Adds the OpenUP lifecycle to Spec Kit: phases, iterations, a seven-level WBS, an executable risk register, bi-directional traceability, and machine-checkable milestone gates. | `process` | Read+Write | [specup](https://github.com/anvigo12/specup) |
 | Optimize | Audit and optimize AI governance for context efficiency — token budgets, rule health, interpretability, compression, coherence, and echo detection | `process` | Read+Write | [spec-kit-optimize](https://github.com/sakitA/spec-kit-optimize) |
 | Orchestration Task Context Management | Adds subagent work-unit orchestration to generated Spec Kit task files | `process` | Read+Write | [spec-kit-orchestration-task-context-management](https://github.com/benizzio/spec-kit-orchestration-task-context-management) |
diff --git a/extensions/catalog.community.json b/extensions/catalog.community.json
index 552274e6b0..3fd2965051 100644
--- a/extensions/catalog.community.json
+++ b/extensions/catalog.community.json
@@ -1,6 +1,6 @@
 {
   "schema_version": "1.0",
-  "updated_at": "2026-09-25T00:00:00Z",
+  "updated_at": "2026-09-28T00:00:00Z",
   "catalog_url": "https://raw.githubusercontent.com/github/spec-kit/main/extensions/catalog.community.json",
   "extensions": {
     "adrkit": {
@@ -3696,6 +3696,42 @@
       "created_at": "2026-03-26T00:00:00Z",
       "updated_at": "2026-03-26T00:00:00Z"
     },
+    "openspec": {
+      "name": "OpenSpec",
+      "id": "openspec",
+      "description": "Adds a spec-driven change-management workflow (propose → implement → verify → archive) to Spec Kit projects, keeping specs, designs, and code in sync",
+      "author": "Aaron Sun",
+      "version": "0.1.0",
+      "download_url": "https://github.com/aaronrsun/spec-kit-openspec/releases/download/openspec-v0.1.0/openspec.zip",
+      "sha256": "9d3b384d5a13c36547352009cc11ce059d45c5f0624b3e3311559e2e5766cdf9",
+      "repository": "https://github.com/aaronrsun/spec-kit-openspec",
+      "homepage": "https://github.com/aaronrsun/spec-kit-openspec",
+      "documentation": "https://github.com/aaronrsun/spec-kit-openspec/blob/main/README.md",
+      "changelog": "https://github.com/aaronrsun/spec-kit-openspec/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "category": "process",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=1.0.0"
+      },
+      "provides": {
+        "commands": 12,
+        "hooks": 0
+      },
+      "tags": [
+        "openspec",
+        "spec-driven-development",
+        "planning",
+        "implementation",
+        "workflow",
+        "experimental"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-09-28T00:00:00Z",
+      "updated_at": "2026-09-28T00:00:00Z"
+    },
     "openup": {
       "name": "OpenUP Governed Lifecycle",
       "id": "openup",