[CI] Add weekly conformance run against latest upstream release

.github/workflows/conformance-weekly.yaml

@@ -0,0 +1,163 @@
+name: conformance-weekly
+
+# Runs the MCP conformance suite on a weekly schedule against the
+# latest @modelcontextprotocol/conformance release. The on:pull_request
+# pipeline already pins to the version of the conformance package
+# available at PR time; this schedule catches upstream releases that
+# add new scenarios between PRs and would otherwise stay invisible.
+on:
+  schedule:
+    # Mondays 06:00 UTC
+    - cron: '0 6 * * 1'
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  conformance-server:
+    name: conformance / server (latest)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup Node
+        uses: actions/setup-node@v6
+        with:
+          node-version: '22'
+
+      - name: Install Composer
+        uses: "ramsey/composer-install@v4"
+
+      - name: Show conformance version
+        run: npx --yes @modelcontextprotocol/conformance@latest --version
+
+      - name: Start conformance server
+        run: |
+          mkdir -p tests/Conformance/sessions tests/Conformance/logs
+          chmod -R 777 tests/Conformance/sessions tests/Conformance/logs
+          docker compose -f tests/Conformance/Fixtures/docker-compose.yml up -d
+          sleep 5
+
+      - name: Run conformance tests
+        working-directory: ./tests/Conformance
+        run: npx --yes @modelcontextprotocol/conformance@latest server --url http://localhost:8000/ --expected-failures conformance-baseline.yml
+
+      - name: Show logs on failure
+        if: failure()
+        run: |
+          echo "=== Docker Compose Logs ==="
+          docker compose -f tests/Conformance/Fixtures/docker-compose.yml logs
+          echo ""
+          echo "=== Conformance Log ==="
+          cat tests/Conformance/logs/conformance.log 2>/dev/null || echo "No conformance log found"
+          echo ""
+          echo "=== Test Results (first failed test) ==="
+          find tests/Conformance/results -name "checks.json" 2>/dev/null | head -3 | while read f; do
+            echo "--- $f ---"
+            cat "$f"
+            echo ""
+          done || echo "No results found"
+
+      - name: Cleanup
+        if: always()
+        run: docker compose -f tests/Conformance/Fixtures/docker-compose.yml down
+
+  conformance-client:
+    name: conformance / client (latest)
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.4'
+          coverage: "none"
+
+      - name: Setup Node
+        uses: actions/setup-node@v6
+        with:
+          node-version: '22'
+
+      - name: Install Composer
+        uses: "ramsey/composer-install@v4"
+
+      - name: Show conformance version
+        run: npx --yes @modelcontextprotocol/conformance@latest --version
+
+      - name: Create log directory
+        run: mkdir -p tests/Conformance/logs
+
+      - name: Run client conformance tests
+        working-directory: ./tests/Conformance
+        run: npx --yes @modelcontextprotocol/conformance@latest client --command "php ${{ github.workspace }}/tests/Conformance/client.php" --suite all --expected-failures conformance-baseline.yml
+
+      - name: Show logs on failure
+        if: failure()
+        run: |
+          echo "=== Client Conformance Log ==="
+          cat tests/Conformance/logs/client-conformance.log 2>/dev/null || echo "No client conformance log found"
+          echo ""
+          echo "=== Test Results ==="
+          find tests/Conformance/results -name "checks.json" 2>/dev/null | head -3 | while read f; do
+            echo "--- $f ---"
+            cat "$f"
+            echo ""
+          done || echo "No results found"
+
+  notify:
+    name: Open issue on failure
+    runs-on: ubuntu-latest
+    needs: [conformance-server, conformance-client]
+    if: failure() && github.event_name == 'schedule'
+    steps:
+      - name: File or update tracking issue
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const marker = '<!-- conformance-weekly-failure -->';
+            const title = '[conformance] Weekly conformance run failed';
+            const runUrl = `${context.serverUrl}/${context.repo.owner}/${context.repo.repo}/actions/runs/${context.runId}`;
+            const body = [
+              marker,
+              `The weekly conformance workflow against the latest \`@modelcontextprotocol/conformance\` release failed.`,
+              ``,
+              `- Workflow run: ${runUrl}`,
+              `- Triggered: ${context.eventName} on ${new Date().toISOString()}`,
+              ``,
+              `This usually means upstream published a new conformance release whose scenarios the SDK does not satisfy. Inspect the run logs and either:`,
+              ``,
+              `1. Fix the SDK to satisfy the new scenarios,`,
+              `2. Update \`tests/Conformance/server.php\` / \`tests/Conformance/client.php\` fixtures, or`,
+              `3. Add the new expected failure to \`tests/Conformance/conformance-baseline.yml\` with justification.`,
+            ].join('\n');
+
+            const existing = await github.rest.issues.listForRepo({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+              labels: 'conformance-weekly',
+              per_page: 50,
+            });
+            const match = existing.data.find(i => (i.body || '').includes(marker));
+
+            if (match) {
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: match.number,
+                body: `New failure on ${new Date().toISOString()}: ${runUrl}`,
+              });
+            } else {
+              await github.rest.issues.create({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                title,
+                body,
+                labels: ['conformance-weekly'],
+              });
+            }