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dealfluence / check-duplication

Use when checking for or pruning duplicate code blocks across source files.

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SKILL.md
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Check Code Duplication Skill

This skill provides a systematic approach to finding and pruning duplicate code blocks and repeated boilerplate across Python, TypeScript, and JavaScript source files.

Workflow

  1. Run the Duplication Spotter:
    Execute python scripts/check_code_duplication.py to identify duplicate code blocks:

     uv run python scripts/check_code_duplication.py -m 6 -n 20

  2. Target High-Score Duplications:
    Focus on blocks with high duplication scores (lines $\times$ occurrences) in source modules.

  3. Prune & Deduplicate:

    • Extract repeated boilerplate or constructor patterns into shared helper functions.
    • Collapse repeated dictionary/object constructions into helper functions.
    • Maintain 3+ call sites requirement for new abstractions.

  4. Verify Behavior:
    Always run test suites to ensure zero functional regressions:

    • Python: uv run pytest & uv run mypy src
    • Node: npm run build && npm test
    • LangChain: uv run pytest in langchain