CrisPy — Python Static Analyzer

CrisPy is a rule-based static analysis extension that detects and explains Python code issues directly in VS Code, with a focus on performance.

Features

Real-time diagnostics — issues are highlighted as you code
Performance-focused rules — catch slow patterns early (NumPy, typing, mutability, and more)
Inline explanations — every rule links to detailed documentation
Per-project configuration — customize rule severity via a .crispy file at your project root
Autocomplete for config — VS Code suggests all available rules in .crispy files

Create a .crispy file at the root of your project to override rule severity:

{
  "prefer-numpy-array": "warning",
  "avoid-mutable-default-args": "error",
  "prefer-explicit-typing": "off"
}

Available severity levels: off · info · warning · danger

ID	Title	Category
PY001	Prefer NumPy Array	Performance
...	...	...

Full rule documentation is available at the CrisPy docs site.

See the contribution guidelines. Issues and PRs are welcome on GitHub.