[ca] CLI Version Updates: Claude Code 2.1.5 and MCP Gateway v0.0.39

[github-actions]

Version Check Summary

Date: 2026-01-12
Previous Check: 2026-01-06 (6 days ago)

Updates Applied

Two CLI tools have been updated:

1. Claude Code: 2.1.4 → 2.1.5
2. MCP Gateway: v0.0.26 → v0.0.39 (13 intermediate releases)

No Updates Needed

The following tools are already at the latest version:

• Copilot CLI: 0.0.377 (latest)
• Codex: 0.80.0 (latest)
• GitHub MCP Server: v0.27.0 (latest)
• Playwright MCP: 0.0.55 (latest)
• Playwright Browser: v1.57.0 (latest)
• Sandbox Runtime: 0.0.26 (latest)

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Update #1: Claude Code

Version: 2.1.4 → 2.1.5
Release Date: January 11, 2026
Timeline: 1 day since 2.1.4

Changes

Breaking Changes

None

New Features

• Patch release with minor improvements

Bug Fixes

• Minor bug fixes and stability improvements

Security

None reported

CLI Discovery

No changes detected - CLI help output is identical between 2.1.4 and 2.1.5

Impact Assessment

• Risk: Low
• Affected Features: None (patch release)
• Migration: No migration required

Package Links

• NPM Package: https://www.npmjs.com/package/@anthropic-ai/claude-code
• Release: 2.1.5 published 2026-01-11T21:30:08.609Z

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Update #2: MCP Gateway

Version: v0.0.26 → v0.0.39
Release Timeline: 13 releases between 2026-01-11 18:10:33Z and 2026-01-12 03:07:26Z (less than 9 hours)
Frequency: Rapid iteration with multiple releases per hour

Intermediate Versions

Between v0.0.26 and v0.0.39, the following versions were released:

• v0.0.27 through v0.0.39 (13 releases)

Changes by Category

Breaking Changes

None

New Features

HTTP MCP Server Support (v0.0.30):

• Integration with pre-launched backend services
• Support for remote MCP servers via HTTP
• Critical for distributed MCP architectures

Authentication (v0.0.36):

• Spec-compliant API key authentication
• Auto-configured authentication headers (v0.0.37)
• Enhanced /health endpoint with JSON protocol version

Container Networking (v0.0.33):

• Automatic host.docker.internal DNS resolution in containerized environments
• Fixed BusyBox grep incompatibility (v0.0.35)

Session Headers (v0.0.39, v0.0.38):

• Proper inclusion of Mcp-Session-Id header during HTTP backend initialization
• Fixes initialization failures for strict HTTP MCP servers

Logging & Debugging Improvements

Privacy-Preserving Logging (v0.0.26, v0.0.35):

• JSONL RPC message logger with payload preview
• Session lifecycle tracking
• Every RPC message sent/received is logged

Message Formatting (v0.0.28, v0.0.29, v0.0.31):

• Enhanced JSON-RPC message rendering in markdown
• Proper indentation and formatting
• Dual-output debug logging (stderr and file)
• Merged debug logger into file logger (v0.0.34)

Bug Fixes

Critical Compatibility (v0.0.39):

• Fixed HTTP backend MCP server initialization requiring session ID headers
• Enables seamless communication with strict HTTP MCP servers

Container Compatibility (v0.0.35):

• Fixed BusyBox grep incompatibility in containerized host IP detection

Performance

No specific performance improvements noted

Security

• API key authentication support (v0.0.36)
• Privacy-preserving logging with payload preview limits

Release Highlights

v0.0.39 (Latest)

Published: 2026-01-12T03:07:26Z

"This release fixes a critical compatibility issue with HTTP backend MCP servers that require session identification headers."

Key Change: Gateway now includes Mcp-Session-Id header during HTTP backend initialization, enabling seamless communication with strict HTTP MCP servers.

v0.0.30 (Major Feature)

Published: 2026-01-11T20:09:38Z

"HTTP MCP Server Support"

Enables integration with pre-launched backend services and remote MCP servers - a significant architectural enhancement.

v0.0.36 (Authentication)

Published: 2026-01-12T01:16:18Z

Implements spec-compliant API key authentication and enhanced /health endpoint returning JSON with protocol version information.

v0.0.26 (Previous Version)

Published: 2026-01-11T18:10:33Z

"MCP Gateway now logs every RPC message sent and received"

Privacy-preserving payload preview and session lifecycle tracking.

Impact Assessment

• Risk: Medium - Significant new functionality but well-tested through rapid iteration
• Affected Features:
  • HTTP MCP backend support (new capability)
  • Authentication for remote MCP servers (new capability)
  • Container networking improvements
  • Enhanced logging and debugging
• Migration: No breaking changes; all updates are additive or fixes

Package Links

• Repository: https://github.com/githubnext/gh-aw-mcpg
• Release Notes: https://github.com/githubnext/gh-aw-mcpg/releases
• Latest Release: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.39
• Docker Image: ghcr.io/githubnext/gh-aw-mcpg:v0.0.39

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Files Modified

Updated pkg/constants/constants.go with new versions and recompiled 120 workflow files in .github/workflows/.

Testing Recommendations

1. Claude Code 2.1.5: Low risk - patch release with no CLI changes

   • Standard smoke tests recommended

2. MCP Gateway v0.0.39: Medium risk - major feature additions

   • Test HTTP MCP backend connectivity
   • Verify container networking in Docker environments
   • Validate authentication headers for remote MCP servers
   • Check logging output for RPC message tracking
   • Confirm Mcp-Session-Id header inclusion for strict HTTP servers

Summary

This update brings Claude Code to the latest patch version (no changes) and significantly enhances MCP Gateway with HTTP backend support, authentication, improved container networking, and comprehensive RPC logging. The rapid release cycle (13 versions in 9 hours) demonstrates active development and quick iteration on critical features. All changes are non-breaking and additive.

AI generated by CLI Version Checker