🔍 Duplicate Code Analysis Report

Analysis of commit 188786c (schema URL update to v0.57.0)

Summary

Semantic analysis of the Go codebase identified 3 significant duplication patterns concentrated in the internal/difc/ package. Total duplicated code: ~71+ lines across 3 files. The patterns are actionable and refactorable with low risk.

Detected Patterns

This analysis found 3 significant duplication patterns:

1. Agent Tag Add/Drop Operations — Severity: High — See sub-issue [duplicate-code] Duplicate Code Pattern: DIFC Agent Tag Add/Drop Operations #1720
2. DIFC Label CheckFlow Implementations — Severity: High — See sub-issue [duplicate-code] Duplicate Code Pattern: DIFC Label CheckFlow Implementations #1721
3. EvaluationResult Default Initialization — Severity: Medium — See sub-issue [duplicate-code] Duplicate Code Pattern: EvaluationResult Default Initialization #1722

Overall Impact

• Total Duplicated Lines: ~71 lines
• Affected Files: 3 files (internal/difc/agent.go, internal/difc/labels.go, internal/difc/evaluator.go)
• Maintainability Risk: Medium — DIFC is security-critical; inconsistent mutations across duplicated tag operations could introduce latent bugs
• Refactoring Priority: Medium — extract generic helpers; changes are low-risk and self-contained within the internal/difc package

Next Steps

1. Review individual pattern sub-issues for detailed analysis
2. Start with agent.go tag operations (easiest win, highest frequency risk)
3. Abstract CheckFlow using generics or an interface-based approach
4. Extract newEmptyEvaluationResult() factory

Analysis Metadata

• Analyzed Files: 70+ Go files (non-test, non-workflow)
• Detection Method: Semantic code pattern analysis
• Commit: 188786c
• Analysis Date: 2026-03-10