jscpd

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GitHub TypeScript MIT

Description

jscpd is a code duplication detector that finds copy-pasted code across large repositories, useful as a code-quality signal for coding agents.

Key Features

  • Copy-paste detector supporting 223 languages and formats
  • Multiple output formats including console, JSON, HTML, and XML reports
  • MCP protocol integration so AI agents can query similarity in real time
  • High accuracy with hybrid token and AST based algorithms
  • Flexible thresholds configurable for minimum lines and tokens of duplicated code

Use Cases

💡 Detect newly added duplicate code in CI and block low-quality merges
💡 Let AI coding agents self-check for duplication before commits
💡 Audit code reuse across a large codebase
💡 Use MCP to surface duplicates in real time inside the IDE or editor

Tags

mcp code-quality static-analysis cli

Categories

🔌 MCP Tools 💻 Coding Agent

Quick Start

# Install jscpd globally
npm install -g jscpd

# Run detection in the project
jscpd ./src

# Start MCP server for agent queries
jscpd --mcp ./src

# Output an HTML report
jscpd --reporters html ./src
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