[ca] Update MCP Gateway to v0.0.76

[github-actions]

Update MCP Gateway

Previous Version: v0.0.74 → New Version: v0.0.76
Intermediate Version: v0.0.75 (released same day as v0.0.76)
Release Date: January 22, 2026
Timeline: 2 versions released within ~9 minutes on 2026-01-22

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🌟 Breaking Changes

None

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✨ New Features

Extensible Server Types (v0.0.75, v0.0.76)

• customSchemas Support: MCP Gateway now supports customSchemas for validating custom server configurations beyond standard stdio and http types
• Define custom server types with JSON schema validation
• Add customSchemas support for extensible server types gh-aw-mcpg#414

Enhanced CLI Experience (v0.0.75, v0.0.76)

• Cobra-based CLI: Introduced validation hooks, verbosity control (-v/--verbose), and shell completion support
• Shell completion for bash/zsh/fish
• Implement Cobra CLI enhancements: validation hooks, verbosity flags, completions gh-aw-mcpg#415

Debug Logging Infrastructure (v0.0.75, v0.0.76)

• Comprehensive debug logging added to request handlers for improved troubleshooting
• Enables debugging of MCP routing and backend communication
• Enable with DEBUG=server:*
• [log] Add debug logging to server/handlers.go gh-aw-mcpg#411

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🔒 Security Improvements

Credential Sanitization (v0.0.75, v0.0.76)

• Docker command logs automatically sanitize sensitive environment variables (tokens, passwords, secrets)
• Prevents accidental exposure of credentials in logs
• Sanitize credentials in Docker command logs gh-aw-mcpg#419

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🐛 Bug Fixes

Variable Expansion Fix (v0.0.75, v0.0.76)

• Environment variable expansion (${VAR_NAME}) now occurs before schema validation
• Enables dynamic configuration values in the container field
• Fix variable expansion in container field before schema validation gh-aw-mcpg#416

Authentication Simplification (v0.0.75, v0.0.76)

• Removed unnecessary authentication wrapper layer
• Clarifies authentication flow and improves maintainability
• Refactor: Remove authentication wrapper, clarify version management, document error types gh-aw-mcpg#418

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🧪 Testing & Quality (v0.0.75, v0.0.76)

• Fixed Serena MCP testing prompt in smoke tests - Fix Serena MCP testing prompt in smoke tests gh-aw-mcpg#401
• Updated testing requirements in smoke-copilot.lock.yml - Update testing requirements in smoke-copilot.lock.yml gh-aw-mcpg#402
• Updated lock files - updated lock gh-aw-mcpg#403
• Added tests for DIFC AgentRegistry.GetOrCreate and AgentLabels methods - [test] Add tests for difc.AgentRegistry.GetOrCreate and AgentLabels methods gh-aw-mcpg#405
• Improved tests for config package - [test-improver] Improve tests for config package gh-aw-mcpg#413
• Repository cleanup: removed temporary files and backup artifacts - Clean up root directory: remove temporary files and backup artifacts gh-aw-mcpg#406

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📦 Impact Assessment

Risk Level: Medium

Affected Features:

• MCP Gateway server configuration and validation
• Docker container command logging
• CLI tooling for MCP Gateway operations
• Custom MCP server type definitions

Migration Notes:

• Required Migration: Update constants.go to use v0.0.76
• Optional Migration: Consider adopting new customSchemas feature for custom MCP server types
• Optional Migration: Use new CLI verbosity flags for debugging
• Compatibility: No breaking changes; existing configurations continue to work

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📚 Package Links

• NPM Package: N/A (Docker-only distribution)
• Repository: https://github.com/githubnext/gh-aw-mcpg
• Release Notes: https://github.com/githubnext/gh-aw-mcpg/releases
• v0.0.74 Release: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.74
• v0.0.75 Release: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.75
• v0.0.76 Release: https://github.com/githubnext/gh-aw-mcpg/releases/tag/v0.0.76
• Full Changelog: githubnext/gh-aw-mcpg@v0.0.74...v0.0.76

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🐳 Docker Image

docker pull ghcr.io/githubnext/gh-aw-mcpg:v0.0.76

Supported Platforms: linux/amd64, linux/arm64

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✅ Update Status

• Constants updated in pkg/constants/constants.go
• Requires recompile: Run make recompile to regenerate workflow lock files
• Test MCP Gateway integration with updated version

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🔍 Additional Context

Note: This update includes both v0.0.75 and v0.0.76, which were released within 9 minutes of each other on January 22, 2026. Both versions contain the same feature set and improvements, suggesting v0.0.76 was a quick follow-up release.

The MCP Gateway is used as the default sandbox.agent container in MCP Gateway configuration (see pkg/constants/constants.go). The new customSchemas feature provides significant flexibility for defining custom MCP server types beyond the standard stdio and http transports.

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