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

(github.com)
136 points d-yoda | 1 comments | 05 Oct 25 13:22 UTC | HN request time: 0.213s | 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
scosman ◴[05 Oct 25 16:18 UTC] No.45482779[source]▶
this should be a MCP server the agent can use and optimize on

I have a MCP server that wraps developer tool CLIs (linting, tests, etc), but this would need a textual report instead of HTML.

https://github.com/scosman/hooks_mcp

replies(4): >>45482803 #>>45483146 #>>45483195 #>>45483685 #
brynary ◴[05 Oct 25 16:21 UTC] No.45482803[source]▶
What benefits do you see from having the agent call a CLI like this via MCP as opposed to just executing the CLI as a shell command and taking action on the stdout?
replies(2): >>45482869 #>>45484096 #
1. mogwire ◴[05 Oct 25 16:27 UTC] No.45482869[source]▶
This is one of the most important questions I see when people recommend an MCP server.

If cursor and Claude code can already run an executable why do I need to add an MCP server in front of it?

I feel like a lot of times it’s, “Because AI”