chore: import upstream snapshot with attribution

.github/workflows/reusable-release.yml

@@ -0,0 +1,172 @@
+name: Reusable Release Workflow
+
+on:
+  workflow_call:
+    inputs:
+      tag:
+        description: 'Version tag (e.g., v1.0.0)'
+        required: true
+        type: string
+      generate-notes:
+        description: 'Auto-generate release notes'
+        required: false
+        type: boolean
+        default: true
+    secrets:
+      NPM_TOKEN:
+        required: false
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: 'Version tag to release or republish (e.g., v2.0.0-rc.1)'
+        required: true
+        type: string
+      generate-notes:
+        description: 'Auto-generate release notes'
+        required: false
+        type: boolean
+        default: true
+
+permissions:
+  contents: read
+
+jobs:
+  verify:
+    name: Verify Release
+    runs-on: ubuntu-latest
+    outputs:
+      already_published: ${{ steps.npm_publish_state.outputs.already_published }}
+      dist_tag: ${{ steps.npm_publish_state.outputs.dist_tag }}
+      package_file: ${{ steps.pack.outputs.package_file }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+        with:
+          fetch-depth: 0
+          ref: ${{ inputs.tag }}
+          persist-credentials: false
+
+      - name: Setup Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: '20.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Install dependencies
+        run: npm ci --ignore-scripts
+
+      - name: Run supply-chain IOC scan
+        run: npm run security:ioc-scan
+
+      - name: Verify OpenCode package payload
+        run: node tests/scripts/build-opencode.test.js
+
+      - name: Verify OMP adapter payload
+        run: node tests/omp/omp-plugin.test.js
+
+      - name: Validate version tag
+        env:
+          INPUT_TAG: ${{ inputs.tag }}
+        run: |
+          if ! [[ "$INPUT_TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[0-9A-Za-z.-]+)?$ ]]; then
+            echo "Invalid version tag format. Expected vX.Y.Z or vX.Y.Z-prerelease"
+            exit 1
+          fi
+
+      - name: Verify package version matches tag
+        env:
+          INPUT_TAG: ${{ inputs.tag }}
+        run: |
+          TAG_VERSION="${INPUT_TAG#v}"
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+          if [ "$TAG_VERSION" != "$PACKAGE_VERSION" ]; then
+            echo "::error::Tag version ($TAG_VERSION) does not match package.json version ($PACKAGE_VERSION)"
+            echo "Run: ./scripts/release.sh $TAG_VERSION"
+            exit 1
+          fi
+
+      - name: Verify release metadata stays in sync
+        run: node tests/plugin-manifest.test.js
+
+      - name: Check npm publish state
+        id: npm_publish_state
+        run: |
+          PACKAGE_NAME=$(node -p "require('./package.json').name")
+          PACKAGE_VERSION=$(node -p "require('./package.json').version")
+          NPM_DIST_TAG=$(node -p "require('./package.json').version.includes('-') ? 'next' : 'latest'")
+          if npm view "${PACKAGE_NAME}@${PACKAGE_VERSION}" version >/dev/null 2>&1; then
+            echo "already_published=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "already_published=false" >> "$GITHUB_OUTPUT"
+          fi
+          echo "dist_tag=${NPM_DIST_TAG}" >> "$GITHUB_OUTPUT"
+
+      - name: Generate release highlights
+        env:
+          TAG_NAME: ${{ inputs.tag }}
+        run: |
+          TAG_VERSION="${TAG_NAME#v}"
+          cat > release_body.md <<EOF
+          ## ECC ${TAG_VERSION}
+
+          ### What This Release Focuses On
+          - Harness reliability and cross-platform compatibility
+          - Eval-driven quality improvements
+          - Better workflow and operator ergonomics
+
+          ### Package Notes
+          - npm package: \`ecc-universal\`
+          - Claude marketplace/plugin identifier: \`ecc@ecc\`
+          EOF
+
+      - name: Pack npm artifact
+        id: pack
+        run: |
+          npm pack --json > npm-pack.json
+          PACKAGE_FILE=$(node -e "const fs = require('fs'); const data = JSON.parse(fs.readFileSync('npm-pack.json', 'utf8')); console.log(data[0].filename)")
+          echo "package_file=${PACKAGE_FILE}" >> "$GITHUB_OUTPUT"
+
+      - name: Upload release artifacts
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
+        with:
+          name: ecc-release-artifacts
+          path: |
+            release_body.md
+            ${{ steps.pack.outputs.package_file }}
+          if-no-files-found: error
+
+  publish:
+    name: Publish Release
+    runs-on: ubuntu-latest
+    needs: verify
+    permissions:
+      contents: write
+      id-token: write
+
+    steps:
+      - name: Download release artifacts
+        uses: actions/download-artifact@3e5f45b2cfb9172054b4087a40e8e0b5a5461e7c # v8.0.1
+        with:
+          name: ecc-release-artifacts
+
+      - name: Setup Node.js
+        uses: actions/setup-node@48b55a011bda9f5d6aeb4c2d9c7362e8dae4041e # v6.4.0
+        with:
+          node-version: '20.x'
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@718ea10b132b3b2eba29c1007bb80653f286566b # v3.0.1
+        with:
+          tag_name: ${{ inputs.tag }}
+          body_path: release_body.md
+          generate_release_notes: ${{ inputs.generate-notes }}
+          prerelease: ${{ contains(inputs.tag, '-') }}
+          make_latest: ${{ contains(inputs.tag, '-') && 'false' || 'true' }}
+
+      - name: Publish npm package
+        if: needs.verify.outputs.already_published != 'true'
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npm publish "${{ needs.verify.outputs.package_file }}" --access public --provenance --tag "${{ needs.verify.outputs.dist_tag }}"