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/actions/setup-bun/action.yml

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+name: "Setup Bun"
+description: "Setup Bun with caching and install dependencies"
+inputs:
+  install-flags:
+    description: "Additional flags to pass to 'bun install'"
+    required: false
+    default: ""
+runs:
+  using: "composite"
+  steps:
+    - name: Get baseline download URL
+      id: bun-url
+      shell: bash
+      run: |
+        if [ "$RUNNER_ARCH" = "X64" ]; then
+          V=$(node -p "require('./package.json').packageManager.split('@')[1]")
+          case "$RUNNER_OS" in
+            macOS)   OS=darwin ;;
+            Linux)   OS=linux ;;
+            Windows) OS=windows ;;
+          esac
+          echo "url=https://github.com/oven-sh/bun/releases/download/bun-v${V}/bun-${OS}-x64-baseline.zip" >> "$GITHUB_OUTPUT"
+        fi
+
+    - name: Setup Bun
+      uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+      with:
+        bun-version-file: ${{ !steps.bun-url.outputs.url && 'package.json' || '' }}
+        bun-download-url: ${{ steps.bun-url.outputs.url }}
+
+    - name: Get cache directory
+      id: cache
+      shell: bash
+      run: echo "dir=$(bun pm cache)" >> "$GITHUB_OUTPUT"
+
+    - name: Restore Bun dependencies
+      id: bun-cache
+      uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+      with:
+        path: ${{ steps.cache.outputs.dir }}
+        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-bun-
+
+    - name: Install setuptools for distutils compatibility
+      run: python3 -m pip install setuptools || pip install setuptools || true
+      shell: bash
+
+    - name: Install dependencies
+      run: |
+        # Workaround for patched peer variants
+        # e.g. ./patches/ for standard-openapi
+        # https://github.com/oven-sh/bun/issues/28147
+        if [ "$RUNNER_OS" = "Windows" ]; then
+          bun install --linker hoisted ${{ inputs.install-flags }}
+        else
+          bun install ${{ inputs.install-flags }}
+        fi
+      shell: bash
+
+    - name: Save Bun dependencies
+      if: steps.bun-cache.outputs.cache-hit != 'true' && github.event_name != 'pull_request' && github.event_name != 'pull_request_target'
+      uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+      with:
+        path: ${{ steps.cache.outputs.dir }}
+        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}

reference/opencode-1.15.5/.github/actions/setup-git-committer/action.yml

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+name: "Setup Git Committer"
+description: "Create app token and configure git user"
+inputs:
+  opencode-app-id:
+    description: "OpenCode GitHub App ID"
+    required: true
+  opencode-app-secret:
+    description: "OpenCode GitHub App private key"
+    required: true
+outputs:
+  token:
+    description: "GitHub App token"
+    value: ${{ steps.apptoken.outputs.token }}
+  app-slug:
+    description: "GitHub App slug"
+    value: ${{ steps.apptoken.outputs.app-slug }}
+runs:
+  using: "composite"
+  steps:
+    - name: Create app token
+      id: apptoken
+      uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2.2.2
+      with:
+        app-id: ${{ inputs.opencode-app-id }}
+        private-key: ${{ inputs.opencode-app-secret }}
+        owner: ${{ github.repository_owner }}
+
+    - name: Configure git user
+      run: |
+        slug="${{ steps.apptoken.outputs.app-slug }}"
+        git config --global user.name "${slug}[bot]"
+        git config --global user.email "${slug}[bot]@users.noreply.github.com"
+      shell: bash
+
+    - name: Clear checkout auth
+      run: |
+        git config --local --unset-all http.https://github.com/.extraheader || true
+      shell: bash
+
+    - name: Configure git remote
+      run: |
+        git remote set-url origin https://x-access-token:${{ steps.apptoken.outputs.token }}@github.com/${{ github.repository }}
+      shell: bash