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136 points d-yoda | 1 comments | 05 Oct 25 13:22 UTC | HN request time: 0s | source

Hi HN! I built pyscn for Python developers in the vibe coding era. If you're using Cursor, Claude, or ChatGPT to ship Python code fast, you know the feeling: features work, tests pass, but the codebase feels... messy.

Common vibe coding artifacts:

• Code duplication (from copy-pasted snippets)

• Dead code from quick iterations

• Over-engineered solutions for simple problems

• Inconsistent patterns across modules

pyscn performs structural analysis:

• APTED tree edit distance + LSH

• Control-Flow Graph (CFG) analysis

• Coupling Between Objects (CBO)

• Cyclomatic Complexity

Try it without installation:

  uvx pyscn analyze .          # Using uv (fastest)
  pipx run pyscn analyze .     # Using pipx
  (Or install: pip install pyscn)

Built with Go + tree-sitter. Happy to dive into the implementation details!

Show context

derekcheng08 ◴[05 Oct 25 15:48 UTC] No.45482457[source]▶

>>45481298 (OP) #

This is pretty awesome! If it's built on tree-sitter, is it fair to assume it's generalizable across languages?

replies(2): >>45482618 #>>45489649 #

1. aitchnyu ◴[06 Oct 25 10:01 UTC] No.45489649[source]▶

>>45482457 #

Tangential, tree-sitter also allowed Aider, AI coding asisstant to exist and allow LLMs to work on codebases above their context limit.

https://aider.chat/docs/recordings/tree-sitter-language-pack...

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Show HN: Pyscn – Python code quality analyzer for vibe coders