🔍 Duplicate Code Analysis Report

Analysis of commit 0ee0a71

Summary

This analysis identified 3 significant duplication patterns in the MCP Gateway codebase that impact maintainability and increase the risk of inconsistent updates across the codebase. The patterns span authorization handling, HTTP transport connection logic, and error handling, totaling approximately 80+ lines of duplicated code.

Detected Patterns

This analysis found 3 significant duplication patterns:

1. Authorization Header Parsing - Severity: High - See sub-issue [duplicate-code] Duplicate Code Pattern: Authorization Header Parsing #352
2. HTTP Transport Connection Boilerplate - Severity: Medium - See sub-issue [duplicate-code] Duplicate Code Pattern: HTTP Transport Connection Boilerplate #353
3. Repeated Error Wrapping Pattern - Severity: Medium - See sub-issue [duplicate-code] Duplicate Code Pattern: Repeated Error Wrapping Pattern #354

Overall Impact

• Total Duplicated Lines: ~80+ lines across multiple files
• Affected Files: 5 core files (routed.go, transport.go, connection.go, config.go, launcher.go)
• Maintainability Risk: High - Changes to authorization or connection logic require updates in multiple locations
• Refactoring Priority: High - Authorization parsing should be refactored immediately to ensure consistent security handling

Next Steps

1. Review individual pattern sub-issues for detailed analysis
2. Prioritize refactoring based on severity and impact (start with authorization handling)
3. Create implementation plan for highest priority patterns
4. Extract shared utilities to reduce duplication

Analysis Metadata

• Analyzed Files: 20+ Go files in internal/ directory
• Detection Method: Direct code analysis with grep and pattern matching
• Commit: 0ee0a71
• Analysis Date: 2026-01-19
• Excluded from Analysis: Test files (_test.go), workflow files (.github/workflows/), agent configs (.github/agents/*)