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code-quality

@tylermorganme/crop_plan_2025
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Run code quality checks including duplication detection (jscpd), unused dependency analysis (depcheck), and complexity metrics. Use when the user asks to check code quality, find duplicate code, detect copy-paste, find unused packages, or analyze code complexity.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name code-quality
description Run code quality checks including duplication detection (jscpd), unused dependency analysis (depcheck), and complexity metrics. Use when the user asks to check code quality, find duplicate code, detect copy-paste, find unused packages, or analyze code complexity.

Code Quality Skill

Run automated code quality checks on the codebase.

Available Scripts

All scripts are in scripts/ and output results to stdout.

Duplication Detection (jscpd)

Finds copy-pasted code blocks:

node .claude/skills/code-quality/scripts/check-duplication.js [path] [--threshold N]
  • path: Directory to scan (default: src/)
  • --threshold N: Fail if duplication exceeds N% (default: 5)
  • --min-lines N: Minimum lines to consider a clone (default: 10)

Unused Dependencies (depcheck)

Finds packages in package.json that aren't imported:

node .claude/skills/code-quality/scripts/check-deps.js [path]
  • path: Project root with package.json (default: current directory)

Complexity Analysis

Reports functions exceeding complexity thresholds:

node .claude/skills/code-quality/scripts/check-complexity.js [path] [--max-complexity N]
  • path: Directory to scan (default: src/)
  • --max-complexity N: Report functions exceeding this cyclomatic complexity (default: 10)

Quick Start

Run all checks:

# From project root
node .claude/skills/code-quality/scripts/check-duplication.js crop-api/src/lib
node .claude/skills/code-quality/scripts/check-deps.js crop-api
node .claude/skills/code-quality/scripts/check-complexity.js crop-api/src/lib

CI Integration

Add to CI pipeline to enforce quality gates:

# Fail if duplication > 3%
npx jscpd src/lib --min-lines 10 --threshold 3

# Fail if unused deps found
npx depcheck --ignores="@types/*"