feat(publish): publish to the official MCP Registry on release (#1585)

## Summary
- Adds `server.json` declaring the npm and OCI packages under the
`io.github.microsoft/playwright-mcp` namespace (already claimed via
`mcpName` in `package.json`).
- Adds a `publish-mcp-release-registry` job to `publish.yml` that runs
after the npm release, auto-syncs `server.json`'s version from
`package.json`, and publishes via `mcp-publisher` using GitHub OIDC (no
PAT needed).
- Unblocks enterprise users on `registryOnly` MCP policies (e.g. VS Code
+ Copilot in security-hardened setups) by listing `@playwright/mcp` in
the official registry.

Fixes #1477

## Precedent

[microsoft/mcp-dotnet-samples](https://github.com/microsoft/mcp-dotnet-samples/blob/main/.github/workflows/build-container.yaml)
publishes `io.github.microsoft/awesome-copilot` to the registry from an
hourly cron using the exact same flow (`id-token: write` + curl-fetched
`mcp-publisher` + `login github-oidc`). It's been running successfully
for weeks, so the GitHub-OIDC path is confirmed to work under
`microsoft/*` corp policy — no DNS / Key Vault setup needed (unlike the
reverted #1197 attempt that used the `com.microsoft/...` namespace).

## Notes
- `server.json`'s committed version is just a placeholder; the workflow
rewrites it from `package.json` before publish, so future `chore: mark
vX.Y.Z` commits don't need to touch `server.json`.
- First release after merge is the live test — no dry-run path.

Author: yury-s

.github/workflows/publish.yml

@@ -67,6 +67,46 @@ jobs:
       - run: npm run ctest
       - run: npm publish
 
+  publish-mcp-release-registry:
+    if: github.event_name == 'release'
+    needs: publish-mcp-release-npm
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write  # Required for GitHub OIDC auth to the MCP Registry
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Validate server.json version matches package.json
+        run: |
+          node -e "
+            const pkg = require('./package.json');
+            const server = require('./server.json');
+            const mismatches = [];
+            if (server.version !== pkg.version)
+              mismatches.push(\`server.version=\${server.version} != package.version=\${pkg.version}\`);
+            for (const p of server.packages) {
+              if (p.version !== pkg.version)
+                mismatches.push(\`packages[\${p.identifier}].version=\${p.version} != package.version=\${pkg.version}\`);
+            }
+            if (mismatches.length) {
+              console.error('server.json is out of sync with package.json:');
+              for (const m of mismatches) console.error('  ' + m);
+              process.exit(1);
+            }
+          "
+
+      - name: Install mcp-publisher
+        run: |
+          curl -L "https://github.com/modelcontextprotocol/registry/releases/latest/download/mcp-publisher_linux_amd64.tar.gz" \
+            | tar xz mcp-publisher
+
+      - name: Authenticate with MCP Registry (GitHub OIDC)
+        run: ./mcp-publisher login github-oidc
+
+      - name: Publish to MCP Registry
+        run: ./mcp-publisher publish
+
   publish-mcp-release-docker:
     if: github.event_name == 'release'
     runs-on: ubuntu-latest

server.json

@@ -0,0 +1,29 @@
+{
+  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
+  "name": "io.github.microsoft/playwright-mcp",
+  "description": "Playwright Tools for MCP",
+  "repository": {
+    "url": "https://github.com/microsoft/playwright-mcp",
+    "source": "github"
+  },
+  "version": "0.0.71",
+  "packages": [
+    {
+      "registryType": "npm",
+      "identifier": "@playwright/mcp",
+      "version": "0.0.71",
+      "transport": {
+        "type": "stdio"
+      }
+    },
+    {
+      "registryType": "oci",
+      "registryBaseUrl": "https://playwright.azurecr.io",
+      "identifier": "public/playwright/mcp",
+      "version": "0.0.71",
+      "transport": {
+        "type": "stdio"
+      }
+    }
+  ]
+}