Code Duplication Python Packages

jscpd

Copy/paste detector for source code. 220+ languages, Rust engine, SARIF/HTML/badge reporters, GitHub Action, MCP server for AI agents.

drift-analyzer

Claude Code plugin that tells your agent when it is about to build something that already exists. Two-line install, no dependencies, answers in under 100 ms. Also a standalone static analyzer for structural drift.

lanorme

Executable codebase standards for Python: quality, style, architecture, and structure, checked mechanically on every commit. Ready-made checks (normes) cover the common ground; a plugin interface lets a team add its own. The same gate runs in CI and inside an AI agent's loop. Docs: https://lanorme.github.io/lanorme/

codeclone

Deterministic Structural Change Controller for AI-assisted Python development

metrolith

Local-first, multi-language static analysis with inspectable code metrics, offline reports and user-defined policies.

clonehunter

CloneHunter finds duplicate code across mixed-language repositories. It runs a semantic retrieval pipeline with model inference and indexing to catch harder, non-trivial duplicate patterns.