Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/opencode-1.15.5/.github/workflows/sync-zed-extension.yml

@@ -0,0 +1,35 @@
+name: "sync-zed-extension"
+
+on:
+  workflow_dispatch:
+  release:
+    types: [published]
+
+jobs:
+  zed:
+    name: Release Zed Extension
+    runs-on: blacksmith-4vcpu-ubuntu-2404
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        with:
+          fetch-depth: 0
+
+      - uses: ./.github/actions/setup-bun
+
+      - name: Get version tag
+        id: get_tag
+        run: |
+          if [ "${{ github.event_name }}" = "release" ]; then
+            TAG="${{ github.event.release.tag_name }}"
+          else
+            TAG=$(git tag --list 'v[0-9]*.*' --sort=-version:refname | head -n 1)
+          fi
+          echo "tag=${TAG}" >> $GITHUB_OUTPUT
+          echo "Using tag: ${TAG}"
+
+      - name: Sync Zed extension
+        run: |
+          ./script/sync-zed.ts ${{ steps.get_tag.outputs.tag }}
+        env:
+          ZED_EXTENSIONS_PAT: ${{ secrets.ZED_EXTENSIONS_PAT }}
+          ZED_PR_PAT: ${{ secrets.ZED_PR_PAT }}