Fixit: Advanced Python Linting Framework with Autofixes

Fixit is an advanced Python linting framework developed by Meta, providing robust auto-fixing capabilities and hierarchical configuration. Built on LibCST, it allows for precise code modifications and makes it straightforward to write custom, in-repo lint rules. Fixit includes a wide array of built-in lint rules, optimizing for efficiency and ease of customization. The current version is 2.2.1, and it undergoes active development with a consistent release cadence.