feat: Cargo workspace restructure with unified binary opt-in

.github/workflows/build-gateway.yml

@@ -58,7 +58,7 @@ jobs:
         uses: docker/build-push-action@v6
         with:
           context: .
-          file: gateway/Dockerfile
+          file: Dockerfile.gateway
           platforms: ${{ matrix.platform.os }}
           outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=${{ inputs.dry_run != true }}
           cache-from: type=gha,scope=gateway-${{ matrix.platform.os }}
@@ -146,9 +146,11 @@ jobs:
           TAG="${{ steps.tag.outputs.tag }}"
           VERSION="${{ steps.tag.outputs.version }}"
           cat > /tmp/release-notes.md << EOF
-          ## OpenAB Custom Gateway v${VERSION}
+          ## OpenAB Gateway v${VERSION}
 
-          Standalone gateway service — bridges webhook-based platforms to OAB via WebSocket.
+          Unified binary with all gateway adapters (Telegram, LINE, Feishu, Google Chat, WeCom, Teams) compiled in via \`BUILD_MODE=unified\`.
+
+          > **Note**: This image contains the full openab binary with all adapters enabled, not a standalone gateway process. It replaces the previous standalone gateway binary.
 
           ### Docker
 
@@ -160,7 +162,7 @@ jobs:
 
           ### Links
 
-          - [Gateway README](https://github.com/openabdev/openab/blob/main/gateway/README.md)
+          - [Gateway Crate README](https://github.com/openabdev/openab/blob/main/crates/openab-gateway/README.md)
           - [ADR: Custom Gateway](https://github.com/openabdev/openab/blob/main/docs/adr/custom-gateway.md)
           EOF
           sed -i 's/^          //' /tmp/release-notes.md

.github/workflows/ci.yml

@@ -4,7 +4,7 @@ on:
   pull_request:
     paths:
       - "src/**"
-      - "gateway/**"
+      - "crates/**"
       - "operator/**"
       - "Cargo.toml"
       - "Cargo.lock"
@@ -18,7 +18,6 @@ jobs:
     runs-on: ubuntu-latest
     outputs:
       core: ${{ steps.filter.outputs.core }}
-      gateway: ${{ steps.filter.outputs.gateway }}
       operator: ${{ steps.filter.outputs.operator }}
     steps:
       - uses: actions/checkout@v6
@@ -29,8 +28,7 @@ jobs:
           BASE=${{ github.event.pull_request.base.sha }}
           HEAD=${{ github.event.pull_request.head.sha }}
           CHANGED=$(git diff --name-only "$BASE" "$HEAD")
-          echo "core=$(echo "$CHANGED" | grep -qE '^(src/|Cargo\.(toml|lock))' && echo true || echo false)" >> "$GITHUB_OUTPUT"
-          echo "gateway=$(echo "$CHANGED" | grep -q '^gateway/' && echo true || echo false)" >> "$GITHUB_OUTPUT"
+          echo "core=$(echo "$CHANGED" | grep -qE '^(src/|crates/|Cargo\.(toml|lock))' && echo true || echo false)" >> "$GITHUB_OUTPUT"
           echo "operator=$(echo "$CHANGED" | grep -q '^operator/' && echo true || echo false)" >> "$GITHUB_OUTPUT"
 
   check:
@@ -44,33 +42,16 @@ jobs:
           components: clippy
       - uses: Swatinem/rust-cache@v2
       - name: cargo check
-        run: cargo check
+        run: cargo check --workspace
       - name: cargo clippy
-        run: cargo clippy -- -D warnings
+        run: cargo clippy --workspace -- -D warnings
+      - name: cargo clippy (unified)
+        run: cargo clippy --workspace --features unified -- -D warnings
       - name: cargo test
-        run: cargo test
+        run: cargo test --workspace
 
-  gateway:
-    needs: changes
-    if: needs.changes.outputs.gateway == 'true'
-    runs-on: ubuntu-latest
-    defaults:
-      run:
-        working-directory: gateway
-    steps:
-      - uses: actions/checkout@v6
-      - uses: dtolnay/rust-toolchain@stable
-        with:
-          components: clippy
-      - uses: Swatinem/rust-cache@v2
-        with:
-          workspaces: gateway
-      - name: cargo check
-        run: cargo check
-      - name: cargo clippy
-        run: cargo clippy -- -D warnings
-      - name: cargo test
-        run: cargo test
+  # gateway tests are now covered by `cargo test --workspace` in the check job above
+  # (openab-gateway is a workspace member in crates/openab-gateway/)
 
   operator:
     needs: changes

.github/workflows/docker-smoke-test.yml

@@ -5,6 +5,7 @@ on:
     paths:
       - 'Dockerfile*'
       - 'src/**'
+      - 'crates/**'
       - 'Cargo.*'
 
 jobs:
@@ -13,25 +14,26 @@ jobs:
       fail-fast: false
       matrix:
         variant:
-          - { dockerfile: Dockerfile, suffix: "", agent: "kiro-cli", agent_args: "acp --trust-all-tools" }
-          - { dockerfile: Dockerfile.claude, suffix: "-claude", agent: "claude-agent-acp", agent_args: "" }
-          - { dockerfile: Dockerfile.codex, suffix: "-codex", agent: "codex-acp", agent_args: "" }
-          - { dockerfile: Dockerfile.gemini, suffix: "-gemini", agent: "gemini", agent_args: "--acp" }
-          - { dockerfile: Dockerfile.copilot, suffix: "-copilot", agent: "copilot", agent_args: "--acp" }
-          - { dockerfile: Dockerfile.opencode, suffix: "-opencode", agent: "opencode", agent_args: "acp" }
-          - { dockerfile: Dockerfile.cursor, suffix: "-cursor", agent: "cursor-agent", agent_args: "acp" }
-          - { dockerfile: Dockerfile.mimocode, suffix: "-mimocode", agent: "mimo", agent_args: "acp" }
-          - { dockerfile: Dockerfile.hermes, suffix: "-hermes", agent: "hermes-acp", agent_args: "" }
-          - { dockerfile: Dockerfile.grok, suffix: "-grok", agent: "grok", agent_args: "agent stdio" }
-          - { dockerfile: Dockerfile.antigravity, suffix: "-antigravity", agent: "agy-acp", agent_args: "" }
-          - { dockerfile: Dockerfile.pi, suffix: "-pi", agent: "pi-acp", agent_args: "" }
-          - { dockerfile: openshell/Dockerfile, suffix: "-native-sandbox", agent: "openab-agent", agent_args: "" }
+          - { dockerfile: Dockerfile, suffix: "", agent: "kiro-cli", agent_args: "acp --trust-all-tools", build_args: "" }
+          - { dockerfile: Dockerfile, suffix: "-unified", agent: "kiro-cli", agent_args: "acp --trust-all-tools", build_args: "--build-arg BUILD_MODE=unified" }
+          - { dockerfile: Dockerfile.claude, suffix: "-claude", agent: "claude-agent-acp", agent_args: "", build_args: "" }
+          - { dockerfile: Dockerfile.codex, suffix: "-codex", agent: "codex-acp", agent_args: "", build_args: "" }
+          - { dockerfile: Dockerfile.gemini, suffix: "-gemini", agent: "gemini", agent_args: "--acp", build_args: "" }
+          - { dockerfile: Dockerfile.copilot, suffix: "-copilot", agent: "copilot", agent_args: "--acp", build_args: "" }
+          - { dockerfile: Dockerfile.opencode, suffix: "-opencode", agent: "opencode", agent_args: "acp", build_args: "" }
+          - { dockerfile: Dockerfile.cursor, suffix: "-cursor", agent: "cursor-agent", agent_args: "acp", build_args: "" }
+          - { dockerfile: Dockerfile.mimocode, suffix: "-mimocode", agent: "mimo", agent_args: "acp", build_args: "" }
+          - { dockerfile: Dockerfile.hermes, suffix: "-hermes", agent: "hermes-acp", agent_args: "", build_args: "" }
+          - { dockerfile: Dockerfile.grok, suffix: "-grok", agent: "grok", agent_args: "agent stdio", build_args: "" }
+          - { dockerfile: Dockerfile.antigravity, suffix: "-antigravity", agent: "agy-acp", agent_args: "", build_args: "" }
+          - { dockerfile: Dockerfile.pi, suffix: "-pi", agent: "pi-acp", agent_args: "", build_args: "" }
+          - { dockerfile: openshell/Dockerfile, suffix: "-native-sandbox", agent: "openab-agent", agent_args: "", build_args: "" }
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
 
       - name: Build image
-        run: docker build -t openab-test${{ matrix.variant.suffix }} -f ${{ matrix.variant.dockerfile }} .
+        run: docker build ${{ matrix.variant.build_args }} -t openab-test${{ matrix.variant.suffix }} -f ${{ matrix.variant.dockerfile }} .
 
       - name: Verify openab CMD does not crash
         run: |

.github/workflows/gateway-release-pr.yml

@@ -29,7 +29,7 @@ jobs:
       - name: Update gateway version
         run: |
           VERSION="${{ inputs.version }}"
-          sed -i "s/^version = .*/version = \"${VERSION}\"/" gateway/Cargo.toml
+          sed -i "s/^version = .*/version = \"${VERSION}\"/" crates/openab-gateway/Cargo.toml
           echo "::notice::Gateway release version: ${VERSION}"
 
       - name: Create release PR