[ca] Update MCP Gateway from v0.0.39 to v0.0.46

[github-actions]

Update MCP Gateway

• Previous: v0.0.39 → New: v0.0.46
• Timeline: 7 intermediate releases (v0.0.40 through v0.0.46) between 2026-01-11 and 2026-01-12
• Breaking Changes: None
• New Features: HTTP transport fallback, improved session handling
• Bug Fixes: HTTP backend session initialization, Accept header support, test stability
• Security: None reported
• CLI Discovery: N/A (Docker image only)
• Subcommand Changes: N/A (Docker image only)
• Impact: Risk Low - Improves HTTP MCP backend compatibility with bug fixes only
• Migration: No - Fully backward compatible

Release Highlights

v0.0.40-41: HTTP Backend Session Initialization Fix

Critical Bug Fix - Fixed HTTP backend initialization to include Mcp-Session-Id headers during session establishment. Previously, HTTP backends that required session ID headers would reject initialization requests with "Missing Mcp-Session-Id header" errors.

Changes:

• Initialization requests now include session ID: gateway-init-{serverID}
• Client requests continue to use session ID from Authorization header
• Fully backward compatible - backends that don't require the header ignore it

PR: githubnext/gh-aw-mcpg#179

v0.0.44: HTTP Transport Fallback

New Feature - Added automatic fallback to HTTP transport for non-standard MCP servers that use HTTP instead of stdio communication protocol.

Changes:

• Transparent fallback mechanism requires no configuration changes
• Expands ecosystem compatibility with HTTP-based MCP servers
• Enables integration with servers that don't follow standard stdio protocol

PR: githubnext/gh-aw-mcpg#180

v0.0.43, v0.0.44: Test Suite Stability

Bug Fix - Fixed unit test hangs during HTTP transport connection attempts, improving development experience and CI reliability.

PR: githubnext/gh-aw-mcpg#182

v0.0.45-46: Accept Header for Session Establishment

Critical Bug Fix - HTTP MCP backends were returning "Session not found" (404) errors because the gateway wasn't sending the required Accept header during session establishment.

Changes:

• Added Accept: application/json, text/event-stream header to all HTTP MCP requests
• Ensures backends can properly determine response format during initialization
• Maintains consistency across both session creation and subsequent requests

PR: githubnext/gh-aw-mcpg#183

Merged PRs

1. typecheck tweaks #179 - Fix HTTP backend session initialization to include Mcp-Session-Id headers

   • Resolves: Session ID requirement for HTTP backends
   • Impact: Enables HTTP backends that enforce session ID validation

2. Docs for output: are not correct #180 - Add HTTP transport fallback for non-standard MCP servers

   • Adds: Automatic HTTP transport fallback
   • Impact: Expands MCP server ecosystem compatibility

3. "gh aw run" reports previous workflow run, not latest #182 - Fix unit test hangs in HTTP transport connection attempts

   • Fixes: Test suite stability issues
   • Impact: Improves CI reliability and developer experience

4. Fix test-agentics workflow to use compiled gh-aw #183 - Add Accept header for HTTP MCP backend session establishment

   • Fixes: Session establishment failures with HTTP backends
   • Impact: Enables reliable content negotiation with HTTP MCP servers

Technical Analysis

This update focuses on improving HTTP MCP backend compatibility through three key areas:

1. Session Management: Proper session ID headers during initialization prevent authentication errors
2. Transport Flexibility: HTTP fallback expands the range of compatible MCP servers
3. Content Negotiation: Accept headers ensure proper response format handling

All changes are backward compatible and focused on bug fixes and compatibility improvements. No breaking changes or API modifications.

Package Links

• Repository: https://github.com/githubnext/gh-aw-mcpg
• Release Notes: https://github.com/githubnext/gh-aw-mcpg/releases
• v0.0.40: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.40
• v0.0.41: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.41
• v0.0.43: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.43
• v0.0.44: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.44
• v0.0.45: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.45
• v0.0.46: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.46
• Docker Image: https://github.com/githubnext/gh-aw-mcpg/pkgs/container/gh-aw-mcpg

Implementation

Updated pkg/constants/constants.go:

• DefaultMCPGatewayVersion: v0.0.39 → v0.0.46

Recompiled 120+ workflow files successfully with make recompile.

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Note: This update was automatically detected and applied by the CLI version checker workflow.
Run: https://github.com/githubnext/gh-aw/actions/runs/20913342543

AI generated by CLI Version Checker

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