Reuse the CI build binary for MCP conformance

.github/workflows/ci.yml

@@ -78,7 +78,22 @@ jobs:
       - uses: actions/checkout@v6.0.2
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2.9.1
-      - run: cargo build --locked --workspace --all-features
+      - name: Build the workspace
+        run: cargo build --locked --workspace --all-features
+
+      - name: Prepare the conformance binary artifact
+        run: |
+          mkdir -p target/conformance
+          cp target/debug/contextforge-data-plane target/conformance/contextforge-data-plane
+          strip target/conformance/contextforge-data-plane
+
+      - name: Upload the conformance binary
+        uses: actions/upload-artifact@v7.0.1
+        with:
+          name: contextforge-data-plane-conformance
+          path: target/conformance/contextforge-data-plane
+          if-no-files-found: error
+          retention-days: 1
 
   bench:
     runs-on: ubuntu-latest
@@ -87,3 +102,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2.9.1
       - run: cargo bench --locked --workspace --no-run
+
+  conformance:
+    needs: build
+    uses: ./.github/workflows/mcp_conformance.yml

.github/workflows/mcp_conformance.yml

@@ -1,19 +1,11 @@
 name: MCP Conformance
 
 on:
-  workflow_dispatch:
-  pull_request:
-    branches: [main]
-  push:
-    branches: [main]
+  workflow_call:
 
 permissions:
   contents: read
 
-concurrency:
-  group: mcp-conformance-${{ github.ref }}
-  cancel-in-progress: true
-
 env:
   MCP_CONFORMANCE_VERSION: 0.2.0-alpha.11
   MCP_CONFORMANCE_SOURCE_SHA: c321dd32035556e6769d3724a8ee97d87c3faaac # pragma: allowlist secret
@@ -32,8 +24,22 @@ jobs:
       - name: Check out data plane
         uses: actions/checkout@v6.0.2
 
-      - name: Build data plane from the checked-out source
-        run: make conformance-image
+      - name: Download the conformance binary
+        uses: actions/download-artifact@v8.0.1
+        with:
+          name: contextforge-data-plane-conformance
+          path: target/conformance
+
+      - name: Make the conformance binary executable
+        run: chmod +x target/conformance/contextforge-data-plane
+
+      - name: Package the data plane conformance image
+        run: >-
+          docker buildx build --load
+          --target conformance-prebuilt
+          --build-context prebuilt=target/conformance
+          --tag "${CF_DATAPLANE_IMAGE}"
+          --file docker/Dockerfile .
 
       - name: Check out the alpha.11 conformance fixture
         uses: actions/checkout@v6.0.2

docker/Dockerfile

@@ -14,15 +14,20 @@ RUN --mount=type=cache,id=cargo,target=/usr/local/cargo/registry,sharing=locked
     --mount=type=cache,id=cargo-git,target=/usr/local/cargo/git,sharing=locked \
     cargo build --release --features "contextforge-data-plane-lib/with_tools contextforge-data-plane/plugins"
 
-FROM debian:trixie-slim
+FROM debian:trixie-slim AS runtime
 RUN <<EOF
 apt update
 apt upgrade -y
 apt install -y python3
 EOF
 
 WORKDIR /
-COPY --from=builder /app/target/release/contextforge-data-plane /contextforge-data-plane
 LABEL org.opencontainers.image.source=https://github.com/contextforge-org/contextforge-data-plane
 LABEL org.opencontainers.image.description="contextforge-data-plane - open source experimental data plane for ContextForge."
 ENTRYPOINT ["/contextforge-data-plane"]
+
+FROM runtime AS conformance-prebuilt
+COPY --from=prebuilt /contextforge-data-plane /contextforge-data-plane
+
+FROM runtime
+COPY --from=builder /app/target/release/contextforge-data-plane /contextforge-data-plane