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How Pyscn Analyzes Python with Go and tree-sitter

Pyscn is a code quality analyzer for Python built by DaisukeYoda at ludo-technologies. It finds dead code, code clones, coupling issues, and complexity hotspots. It’s written in Go, uses tree-sitter for parsing, and processes over 100,000 lines per second. I’ve been studying its internals and the engineering decisions are worth writing about: how it detects dead code through control flow analysis, finds duplicated code across clone types 1-4 with LSH acceleration, and integrates with AI coding assistants via MCP. ...