[ca] Update GitHub MCP Server to v0.19.0

[github-actions]

Update GitHub MCP Server to v0.19.0

Version Summary

• Previous: v0.18.0 → New: v0.19.0
• Release Date: October 20, 2025 (released today)
• Interval: 10 days between releases (v0.18.0 released October 10, 2025)

Release Information

• GitHub Release: https://github.com/github/github-mcp-server/releases/tag/v0.19.0
• Changelog: github/github-mcp-server@v0.18.0...v0.19.0

Breaking Changes

None

New Features

1. Default Toolset Configuration Enhancement

• Added support for "default" toolset string in configuration
• Simplifies configuration by allowing "default" instead of explicitly naming toolsets
• Examples:
  • Use "default" instead of "context,repos,issues,pull_requests,users"
  • Use "default,discussions" instead of "context,repos,issues,pull_requests,users,discussions"
• Reference: PR #1229

2. Improved Error Handling

• Unknown toolsets can now be ignored gracefully
• Reference: PR #1202

Tool Consolidation

Pull Request Review Tools Consolidation

The following pull request review tools have been consolidated into a single pull_request_review_write tool:

• create_and_submit_pull_request_review (removed)
• create_pending_pull_request_review (removed)
• submit_pending_pull_request_review (removed)
• delete_pending_pull_request_review (removed)

New tool: pull_request_review_write with method parameter:

• create - Create a new review
• submit_pending - Submit a pending review
• delete_pending - Delete a pending review

This follows the pattern established in v0.18.0 where pull request read tools were consolidated.

Reference: PR #1192

Bug Fixes

• Fixed subdomain isolation URL parsing
  • Reference: PR #1218
• Fixed environment variable mapping for read-only mode
  • Reference: PR #1067

Documentation Updates

• Restructured README for better GHES/GHEC visibility
  • Reference: PR #1210
• Updated README for remote-only tools
  • Reference: PR #1227
• Added Gemini CLI additional options documentation
  • Reference: PR #1223
• Documented new "GitHub Support Docs Search" tool
  • Reference: PR #1225

Infrastructure

• Simplified Registry release pipeline
  • Reference: PR #1204
• Added Gemini CLI extension
  • Reference: PR #1232

Impact Assessment

• Risk Level: Low
• Affected Features:
  • GitHub MCP Server Docker image version in workflows
  • Pull request review workflow consolidation may require workflow adjustments if using the removed tools
• Migration Required: No
  • The update only changes the default Docker image version
  • Tool consolidation is transparent to gh-aw users unless workflows explicitly use the removed tools
  • For more details on toolsets: 🚀 Improving GitHub MCP Server Performance and Resource Consumption: Introducing default toolsets github/github-mcp-server#1182

Changes Made

✅ Updated pkg/constants/constants.go from v0.18.0 to v0.19.0
✅ Ran make recompile successfully
✅ All 39 workflow files compiled without errors

Other CLI Versions Checked

• Claude Code: 2.0.22 (up to date)
• Copilot CLI: 0.0.346 (up to date)
• Codex: 0.47.0 (up to date)

Next Steps

1. Review this issue for accuracy
2. Test workflows to ensure compatibility
3. Monitor for any issues with the new GitHub MCP Server version

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This issue was automatically created by the CLI Version Checker workflow

AI generated by CLI Version Checker

[pelikhan]

@copilot implement recommendation and add "default" toolset to list of toolsets. Update default list of allowed tools for local and remote servers.