[duplicate-code] Duplicate Code Analysis Report - Logger and MCP Connection Patterns

[github-actions]

🔍 Duplicate Code Analysis Report

Analysis of commit c7a6fec

Summary

This analysis identified 3 significant duplication patterns in the MCP Gateway codebase that impact maintainability and increase the risk of inconsistent behavior across the application.

Detected Patterns

This analysis found 3 significant duplication patterns:

1. Logger Function Duplication - Severity: High - See sub-issue [duplicate-code] Duplicate Code Pattern: Logger Functions with Repeated Mutex Lock Patterns #971

   • 12+ nearly identical logging functions with repeated mutex lock/unlock patterns
   • Affects: internal/logger/file_logger.go, server_file_logger.go, markdown_logger.go

2. MCP Session Validation Checks - Severity: Medium - See sub-issue [duplicate-code] Duplicate Code Pattern: MCP Session Nil Validation Checks #972

   • 6 identical session nil checks in MCP connection methods
   • Affects: internal/mcp/connection.go

3. Parameter Marshaling Pattern - Severity: Low - See sub-issue #aw_ghi789abcdef

   • Repeated marshal/unmarshal pattern for parameter handling
   • Affects: internal/mcp/connection.go

Overall Impact

• Total Duplicated Lines: ~150+ lines of repetitive code
• Affected Files: 4 core files (logger package and MCP connection)
• Maintainability Risk: High - Changes to logging behavior require updates in 12+ functions
• Refactoring Priority: High - Logger duplication should be addressed first

Next Steps

1. Review individual pattern sub-issues for detailed analysis
2. Prioritize refactoring based on severity (Logger functions → Session checks → Param marshaling)
3. Create implementation plan for highest priority patterns
4. Run full test suite after each refactoring to ensure no regressions

Analysis Metadata

• Analyzed Files: 67 Go files (non-test files in internal/)
• Detection Method: Serena semantic code analysis + pattern matching
• Commit: c7a6fec
• Analysis Date: 2026-02-16T10:22:28Z
• Exclusions: Test files, workflow files, agent configurations