ci: add GitHub Actions for PR checks and releases

ci.yml: lint, test, build on PRs to main.
release.yml: multi-platform binaries + Docker image on version tags.
Targets: linux/amd64, linux/arm64, darwin/amd64, darwin/arm64, windows/amd64.
Docker pushed to ghcr.io/smart-mcp-proxy/synapbus.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -0,0 +1,61 @@
+name: CI
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - uses: golangci/golangci-lint-action@v6
+        with:
+          version: latest
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+          cache-dependency-path: web/package-lock.json
+
+      - name: Build web frontend
+        run: |
+          cd web && npm ci && npm run build
+
+      - name: Copy web assets
+        run: |
+          rm -rf internal/web/dist
+          cp -r web/build internal/web/dist
+
+      - name: Run tests
+        run: CGO_ENABLED=0 go test -count=1 -timeout 120s ./...
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - name: Verify binary builds
+        run: CGO_ENABLED=0 go build -o /dev/null ./cmd/synapbus/

.github/workflows/release.yml

@@ -0,0 +1,136 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "v*"
+
+jobs:
+  release:
+    name: Build & Release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    strategy:
+      matrix:
+        include:
+          - goos: linux
+            goarch: amd64
+            suffix: ""
+          - goos: linux
+            goarch: arm64
+            suffix: ""
+          - goos: darwin
+            goarch: amd64
+            suffix: ""
+          - goos: darwin
+            goarch: arm64
+            suffix: ""
+          - goos: windows
+            goarch: amd64
+            suffix: ".exe"
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23"
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+          cache-dependency-path: web/package-lock.json
+
+      - name: Build web frontend
+        run: |
+          cd web && npm ci && npm run build
+
+      - name: Copy web assets
+        run: |
+          rm -rf internal/web/dist
+          cp -r web/build internal/web/dist
+
+      - name: Build binary
+        env:
+          CGO_ENABLED: "0"
+          GOOS: ${{ matrix.goos }}
+          GOARCH: ${{ matrix.goarch }}
+        run: |
+          go build -ldflags "-s -w" -o synapbus-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.suffix }} ./cmd/synapbus/
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: synapbus-${{ matrix.goos }}-${{ matrix.goarch }}
+          path: synapbus-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.suffix }}
+
+  publish:
+    name: Publish Release
+    needs: release
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          generate_release_notes: true
+          files: artifacts/*
+
+  docker:
+    name: Docker
+    needs: release
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+          cache: npm
+          cache-dependency-path: web/package-lock.json
+
+      - name: Build web frontend
+        run: |
+          cd web && npm ci && npm run build
+
+      - name: Copy web assets
+        run: |
+          rm -rf internal/web/dist
+          cp -r web/build internal/web/dist
+
+      - uses: docker/setup-qemu-action@v3
+
+      - uses: docker/setup-buildx-action@v3
+
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract version tag
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/smart-mcp-proxy/synapbus
+          tags: |
+            type=semver,pattern={{version}}
+            type=raw,value=latest
+
+      - uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max