[extension] Add DUBSAR Memory extension to community catalog (#4170)

* Add DUBSAR Memory extension to community catalog

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

Closes #4130

Assisted-by: GitHub Copilot (model: claude-sonnet-4.6, autonomous)
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review: minimize catalog churn and add dubsar sha256

Reserialize the community catalog back to its original formatting and
entry order so the patch is limited to the top-level timestamp plus the
new dubsar entry, and add the published asset's sha256 digest so catalog
installs enforce archive verification.

Assisted-by: GitHub Copilot (model: Claude Opus 4.8, autonomous)
Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Manfred Riem <15701806+mnriem@users.noreply.github.com>

Author: 3 people

docs/community/extensions.md

@@ -60,6 +60,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Data Model Diagram | Generates Mermaid ER diagrams from Spec Kit data models after planning | `docs` | Read+Write | [spec-kit-data-model-diagram](https://github.com/benizzio/spec-kit-data-model-diagram) |
 | DocGuard — CDD Enforcement | The only doc-integrity engine with an MCP server, SARIF/JUnit output, and a deterministic zero-LLM core. Validates, scores, and traces documentation against code — 27 validators, stable finding codes, adoption baseline for legacy repos, compliance-evidence reports, GitHub Action with PR annotations, spec-kit hooks. Pure Node.js, one pinned dep. | `docs` | Read+Write | [spec-kit-docguard](https://github.com/raccioly/docguard) |
 | 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) |
 | 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) |

extensions/catalog.community.json

@@ -1511,6 +1511,48 @@
       "created_at": "2026-07-16T00:00:00Z",
       "updated_at": "2026-07-16T00:00:00Z"
     },
+    "dubsar": {
+      "name": "DUBSAR Memory",
+      "id": "dubsar",
+      "description": "Local project memory for Spec Kit with explicit checkpoints, cross-session resume, and SHA-256 freshness for recorded specification, plan, and task references.",
+      "author": "DUBSAR",
+      "version": "0.1.4",
+      "download_url": "https://github.com/kotnisofiane-bit/dubsar-memory/releases/download/speckit-dubsar-v0.1.4/dubsar-memory-extension.zip",
+      "sha256": "55282acfd5df4f000ee75395b4eb6db68562b3fd80fe39330b67a9296435f556",
+      "repository": "https://github.com/kotnisofiane-bit/dubsar-memory",
+      "homepage": "https://github.com/kotnisofiane-bit/dubsar-memory",
+      "documentation": "https://github.com/kotnisofiane-bit/dubsar-memory/blob/main/integrations/spec-kit/dubsar-memory/README.md",
+      "changelog": "https://github.com/kotnisofiane-bit/dubsar-memory/blob/main/CHANGELOG.md",
+      "license": "MIT",
+      "category": "visibility",
+      "effect": "read-write",
+      "requires": {
+        "speckit_version": ">=0.16.4",
+        "tools": [
+          {
+            "name": "node",
+            "version": ">=20",
+            "required": true
+          }
+        ]
+      },
+      "provides": {
+        "commands": 2,
+        "hooks": 0
+      },
+      "tags": [
+        "memory",
+        "continuity",
+        "checkpoints",
+        "resume",
+        "offline"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-08-17T00:00:00Z",
+      "updated_at": "2026-08-17T00:00:00Z"
+    },
     "ears": {
       "name": "EARS Requirements Syntax",
       "id": "ears",