chore(catalog): add Jira Integration (Sync Engine) extension (#2895)

* chore(catalog): add Jira Integration (Sync Engine) extension

Adds a new community-catalog listing for `spec-kit-jira-sync`
(ashbrener/spec-kit-jira-sync), a reconcile-engine bridge that mirrors
spec-kit specs into Jira (Epic per repo, Story per spec, Subtask per
phase): idempotent, drift-aware, fail-closed.

Catalog id is `jira-sync` because the `jira` id is already taken by an
unrelated extension; display name "Jira Integration (Sync Engine)"
disambiguates from the existing "Jira Integration" listing.

Touches the two catalog surfaces:
1. extensions/catalog.community.json - the new "jira-sync" entry,
   inserted after the existing "jira" entry. Field shape matches the
   sibling "linear" entry exactly.
2. docs/community/extensions.md - the table row, after the existing
   Jira Integration row.

JSON validated; diff is the single entry + the one table row.

* catalog(jira-sync): neutral capability-focused description (address Copilot review)

Drop the comparative/absolute framing ('A real …', 'never corrupts your board')
flagged by Copilot; keep the factual, tested capability descriptors (idempotent,
drift-aware, fail-closed). Applies to both the catalog entry and the docs table row.

* chore(catalog): bump jira-sync to v0.2.0 (re-mode + engine unification)

* fix(catalog): jira-sync download_url .tar.gz -> .zip (installer is ZIP-only)

The spec-kit extension installer saves {id}-{version}.zip and extracts via
zipfile.ZipFile (src/specify_cli/extensions.py) — a .tar.gz asset downloads but
fails extraction. Matches every other catalog entry's /archive/refs/tags/vX.zip
convention. Addresses the Copilot review on PR #2895.

---------

Co-authored-by: Ash Brener <ashley@midletearth.com>

docs/community/extensions.md

@@ -55,6 +55,7 @@ The following community-contributed extensions are available in [`catalog.commun
 | Intelligent Agent Orchestrator | Cross-catalog agent discovery and intelligent prompt-to-command routing | `process` | Read+Write | [spec-kit-orchestrator](https://github.com/pragya247/spec-kit-orchestrator) |
 | Iterate | Iterate on spec documents with a two-phase define-and-apply workflow — refine specs mid-implementation and go straight back to building | `docs` | Read+Write | [spec-kit-iterate](https://github.com/imviancagrace/spec-kit-iterate) |
 | Jira Integration | Create Jira Epics, Stories, and Issues from spec-kit specifications and task breakdowns with configurable hierarchy and custom field support | `integration` | Read+Write | [spec-kit-jira](https://github.com/mbachorik/spec-kit-jira) |
+| Jira Integration (Sync Engine) | Idempotent, drift-aware, fail-closed reconcile engine mirroring spec-kit specs into Jira (Epic per repo, Story per spec, Subtask per phase) | `integration` | Read+Write | [spec-kit-jira-sync](https://github.com/ashbrener/spec-kit-jira-sync) |
 | Learning Extension | Generate educational guides from implementations and enhance clarifications with mentoring context | `docs` | Read+Write | [spec-kit-learn](https://github.com/imviancagrace/spec-kit-learn) |
 | Linear Integration | Mirror spec-kit feature directories into Linear (filesystem → Linear, reconcile-based, unidirectional). | `integration` | Read+Write | [spec-kit-linear-sync](https://github.com/ashbrener/spec-kit-linear-sync) |
 | MAQA — Multi-Agent & Quality Assurance | Coordinator → feature → QA agent workflow with parallel worktree-based implementation. Language-agnostic. Auto-detects installed board plugins. Optional CI gate. | `process` | Read+Write | [spec-kit-maqa-ext](https://github.com/GenieRobot/spec-kit-maqa-ext) |

extensions/catalog.community.json

@@ -1215,6 +1215,39 @@
       "created_at": "2026-03-05T00:00:00Z",
       "updated_at": "2026-03-05T00:00:00Z"
     },
+    "jira-sync": {
+      "name": "Jira Integration (Sync Engine)",
+      "id": "jira-sync",
+      "description": "An idempotent, drift-aware, fail-closed reconcile engine that mirrors spec-kit specs into Jira (Epic per repo, Story per spec, Subtask per phase).",
+      "author": "Ash Brener",
+      "version": "0.2.0",
+      "download_url": "https://github.com/ashbrener/spec-kit-jira-sync/archive/refs/tags/v0.2.0.zip",
+      "repository": "https://github.com/ashbrener/spec-kit-jira-sync",
+      "homepage": "https://github.com/ashbrener/spec-kit-jira-sync",
+      "documentation": "https://github.com/ashbrener/spec-kit-jira-sync/blob/main/README.md",
+      "changelog": "https://github.com/ashbrener/spec-kit-jira-sync/releases",
+      "license": "MIT",
+      "requires": {
+        "speckit_version": ">=0.1.0"
+      },
+      "provides": {
+        "commands": 2,
+        "hooks": 0
+      },
+      "tags": [
+        "issue-tracking",
+        "jira",
+        "tasks-sync",
+        "lifecycle-mirror",
+        "reconcile",
+        "drift-aware"
+      ],
+      "verified": false,
+      "downloads": 0,
+      "stars": 0,
+      "created_at": "2026-06-08T00:00:00Z",
+      "updated_at": "2026-06-08T00:00:00Z"
+    },
     "learn": {
       "name": "Learning Extension",
       "id": "learn",