Update Playwright MCP server to use official Docker image

[Copilot]

Switches Playwright MCP server configuration from running via npx directly to using the official Microsoft Playwright MCP Docker image (mcr.microsoft.com/playwright/mcp) for consistent browser environment.

Changes

• mcp-config.go: Updated renderPlaywrightMCPConfigWithOptions and renderPlaywrightMCPConfigTOML to use Docker
• mcp_renderer.go: Updated renderPlaywrightTOML to use Docker
• docker.go: Added Playwright image to collectDockerImages for predownloading
• Tests: Updated all Playwright-related tests to expect Docker commands

Generated Configuration

Before:

{
  "playwright": {
    "command": "npx",
    "args": ["@playwright/mcp@0.0.48", "--output-dir", "/tmp/gh-aw/mcp-logs/playwright"]
  }
}

After:

{
  "playwright": {
    "command": "docker",
    "args": ["run", "-i", "--rm", "--init", "mcr.microsoft.com/playwright/mcp", "--output-dir", "/tmp/gh-aw/mcp-logs/playwright", "--allowed-hosts", "localhost;localhost:*;127.0.0.1;127.0.0.1:*"]
  }
}

Implementation Details

• Uses unversioned Docker image (mcr.microsoft.com/playwright/mcp) as there is only one image available
• Includes --init argument for proper signal handling
• Preserves --output-dir flag for MCP logs
• No --pull=always flag (image is predownloaded via docker pull step)
• Docker image added to predownloaded images list for faster workflow startup

Uses the official Playwright MCP Docker image as documented in the Playwright MCP repository.

Note

The Docker implementation only supports headless Chromium at the moment.

Original prompt

Uodate playwright MCP server configuration generation to use docker image instead of npx.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[github-actions]

✅ Agentic Changeset Generator completed successfully.

[pelikhan]

See docs on using docker:

NOTE: The Docker implementation only supports headless chromium at the moment.

{
  "mcpServers": {
    "playwright": {
      "command": "docker",
      "args": ["run", "-i", "--rm", "--init", "--pull=always", "mcr.microsoft.com/playwright/mcp"]
    }
  }
}
Or If you prefer to run the container as a long-lived service instead of letting the MCP client spawn it, use:

docker run -d -i --rm --init --pull=always \
  --entrypoint node \
  --name playwright \
  -p 8931:8931 \
  mcr.microsoft.com/playwright/mcp \
  cli.js --headless --browser chromium --no-sandbox --port 8931
The server will listen on host port 8931 and can be reached by any MCP client.

[pelikhan]

@copilot apply comment above

[Copilot]

@copilot apply comment above

Updated to use the official Playwright MCP Docker image (mcr.microsoft.com/playwright/mcp) with the correct Docker arguments (run -i --rm --init --pull=always) as per the documentation. Commit eacf2ff.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[pelikhan]

@copilot

• keep versions in MCP and container image
• keep output dir flag
• make sure docker images is included in predownloaded docker images
• no pull always

[pelikhan]

@copilot continue work

[Copilot]

@copilot continue work

Completed the changes:

• Versioned container image: mcr.microsoft.com/playwright/mcp:v1.57.0
• Kept --output-dir /tmp/gh-aw/mcp-logs/playwright flag
• Removed --pull=always
• Added Playwright image to predownloaded images in collectDockerImages

Commit 7039f42.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[Copilot]

@copilot Do not version the docker image, add --init argument.
See docs:

...

Removed the version tag from the Docker image. Now using mcr.microsoft.com/playwright/mcp without version suffix. The --init argument is already present. Commit f0271c1.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/user
  • Triggering command: /usr/bin/gh gh api user --jq .login (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

[github-actions]

✅ Agentic Changeset Generator completed successfully.

[github-actions]

Agentic Smoke Codex triggered by this pull request.

[github-actions]

❌ Agentic Smoke Copilot failed and wasn't able to produce a result.

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Agentic Smoke Claude triggered by this pull request.

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Claude Engine Smoke Test Results ✅

1. GitHub MCP Testing ✅

Successfully reviewed the last 2 merged pull requests:

PR #4890 - "Fix broken integration tests by stripping YAML comment header before assertions"

• Merged: 2025-11-26T22:56:34Z
• Fixed TestTopLevelGitHubTokenPrecedence and TestNeutralToolsIntegration by adding StripYAMLCommentHeader() helper to remove comment headers from compiled YAML before assertions

PR #4888 - "Add PR description conciseness guideline to AGENTS.md"

• Merged: 2025-11-26T22:45:35Z (draft)
• Added guidance that PR descriptions should be limited to 1-2 sentences in AGENTS.md Quick Reference

2. File Writing Testing ✅

Created test file: /tmp/smoke-test-claude-sonnet-4-5.txt

• File content: Smoke test passed for Claude at $(date)
• File creation confirmed successful

3. Bash Tool Testing ✅

Verified file creation using cat command:

• File successfully read back
• Content matches expected output

4. Playwright MCP Testing ✅

Navigated to https://github.com and verified:

• Page URL: https://github.com/
• Page Title: "GitHub · Change is constant. GitHub keeps you ahead. · GitHub" ✅ (contains "GitHub")

---

Overall Smoke Test Status: PASSED ✅

All four test categories completed successfully for Claude Sonnet 4.5 engine.

AI generated by Smoke Claude for #4876

[github-actions]

Smoke test results for the Codex engine:

• Merged PRs reviewed:
  • Fix broken integration tests by stripping YAML comment header before assertions #4890 – Fixes two integration tests by stripping frontmatter comment headers before running YAML assertions via a shared helper.
  • Add engine-specific labels and reactions to smoke workflows #4879 – Adds engine-specific smoke-workflow labels/reactions (including smoke-codex) and removes the staged flag before recompiling locks.
• File writing: ✅ Created /tmp/smoke-test-codex-.txt with Smoke test passed for Codex at Wed Nov 26 23:01:06 UTC 2025.
• Bash verification: ✅ cat /tmp/smoke-test-codex-.txt returned the expected line above.
• Playwright validation: ✅ Navigated to https://github.com and confirmed the page title GitHub · Change is constant. GitHub keeps you ahead. · GitHub contains “GitHub”.

Overall: ✅ All Codex smoke-test checks succeeded.

AI generated by Smoke Codex for #4876

[github-actions]

Agentic Smoke Claude triggered by this pull request.

[github-actions]

Agentic Smoke Codex triggered by this pull request.

[github-actions]

❌ Agentic Smoke Copilot failed and wasn't able to produce a result.

[github-actions]

✅ Agentic Changeset Generator completed successfully.

[github-actions]

Claude Engine Smoke Test Results

Test Summary

All smoke tests passed successfully for the Claude engine (Sonnet 4.5).

Detailed Results

✅ 1. GitHub MCP Testing

Status: PASSED

Successfully reviewed the last 2 merged pull requests:

• PR Fix broken integration tests by stripping YAML comment header before assertions #4890: "Fix broken integration tests by stripping YAML comment header before assertions"

  • Fixed two integration tests that were failing due to YAML comment headers
  • Added StripYAMLCommentHeader() helper in pkg/testutil/tempdir.go
  • Merged on 2025-11-26 at 22:56:34

• PR Add PR description conciseness guideline to AGENTS.md #4888: "Add PR description conciseness guideline to AGENTS.md"

  • Added guidance that PR descriptions should be limited to 1-2 sentences
  • Updated AGENTS.md Quick Reference for AI Agents section
  • Closed on 2025-11-26 at 22:45:35

✅ 2. File Writing Testing

Status: PASSED

Successfully created test file at /tmp/smoke-test-claude-sonnet-4-5.txt with content:

Smoke test passed for Claude at Wed Nov 26 23:16:41 UTC 2025

✅ 3. Bash Tool Testing

Status: PASSED

Successfully verified file creation using cat command:

$ cat /tmp/smoke-test-claude-sonnet-4-5.txt
Smoke test passed for Claude at Wed Nov 26 23:16:41 UTC 2025

✅ 4. Playwright MCP Testing

Status: PASSED

Successfully navigated to https://github.com and verified page title:

• Page Title: "GitHub · Change is constant. GitHub keeps you ahead. · GitHub"
• Verification: Page title contains "GitHub" ✓

---

Overall Status

🎉 All tests PASSED - Claude engine is functioning correctly!

AI generated by Smoke Claude for #4876

[github-actions]

Codex smoke test results:

• Recent merges: Fix broken integration tests by stripping YAML comment header before assertions #4890 fixes failing integration tests by introducing StripYAMLCommentHeader() so assertions ignore generated front-matter comments, and refactor: unify parser log JavaScript files and remove duplicate code #4886 deduplicates the log parser JavaScript by moving shared helpers into log_parser_shared.cjs so all engines reuse the same utilities.
• File writing: created /tmp/smoke-test-codex-.txt with Smoke test passed for Codex at Wed Nov 26 23:17:42 UTC 2025.
• Bash verification: cat /tmp/smoke-test-codex-.txt returned the expected line above, confirming the file contents.
• Playwright check: Navigated to https://github.com and observed the page title GitHub · Change is constant. GitHub keeps you ahead. · GitHub, which contains "GitHub" as required.

All checks passed — Codex engine smoke test SUCCESS ✅

AI generated by Smoke Codex for #4876