fixit
A lint framework that writes better Python code for you.
Decision gist · record as of 2026-08-14
Yes, if you need a customizable linting framework with auto-fix capability. Fixit is actively maintained, has low install friction, and is permissively licensed. The Alpha status and need to migrate from older versions are minor concerns; the real question is whether you need custom rules—if standard linters suffice, Fixit adds unnecessary complexity.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.9 or later.
- Low install friction with a pure-Python wheel and six runtime dependencies.
- Actively maintained with a recent release and ongoing repository activity; marked as Alpha in development status but in active use.
License · maintenance · safety
permissive license (permissive) — MIT licensed under permissive terms, allowing commercial and private use with minimal restrictions. Includes additional Apache 2.0 license text in the package metadata.
last release 2025-11-12 (275 days) · last repo commit 2026-07-01 · 712 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 417,754 downloads/mo, #6,809 on PyPI
Alternatives
Verify before relying
pip install fixit
import fixit
from fixit.rules import Rule
# Define or use built-in rules, then run linter on code- Whether Fixit 2.0's configuration and custom rule API are stable or still subject to breaking changes despite active maintenance.
- Specific performance characteristics when linting large codebases or complex rule sets.
- Extent of built-in rule library versus reliance on writing custom rules.
What it is and what it does
Fixit is a linting framework that analyzes Python code using LibCST to detect style and quality issues, then suggests or automatically applies fixes. It's designed for teams that want to enforce custom coding standards beyond what standard linters provide, with support for hierarchical configuration and local rule definitions. The framework handles the heavy lifting of AST traversal and code transformation, letting you focus on defining what constitutes a violation and how to fix it.
The package is built around the idea that linting should be both configurable and actionable—rules can propose changes that developers accept interactively or automatically. Fixit 2.0 represents a significant rebuild from earlier versions, with improved configuration handling and better support for custom rules, though this means projects on older versions may need migration effort.
Use it for
- Enforce team-specific code style rules that go beyond PEP 8 or standard linters like flake8.
- Auto-fix common code patterns across a large codebase with suggested changes for review.
- Build a custom linting layer for a framework or library to guide users toward best practices.
- Integrate lint rules into CI/CD pipelines with automatic fix application for low-risk violations.
- Create organization-wide lint rules that apply consistently across multiple projects.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes, if you need a customizable linting framework with auto-fix capability.
Fixit is actively maintained, has low install friction, and is permissively licensed. The Alpha status and need to migrate from older versions are minor concerns; the real question is whether you need custom rules—if standard linters suffice, Fixit adds unnecessary complexity.
Install
fixit on PyPI
Before you install
Low install friction with a pure-Python wheel and six runtime dependencies. Actively maintained with a recent release and ongoing repository activity; marked as Alpha in development status but in active use.
Requires Python 3.9 or later.
License in practice
MIT licensed under permissive terms, allowing commercial and private use with minimal restrictions. Includes additional Apache 2.0 license text in the package metadata.
Quickstart
pip install fixit
import fixit
from fixit.rules import Rule
# Define or use built-in rules, then run linter on codeVerify before relying
- Whether Fixit 2.0's configuration and custom rule API are stable or still subject to breaking changes despite active maintenance.
- Specific performance characteristics when linting large codebases or complex rule sets.
- Extent of built-in rule library versus reliance on writing custom rules.
Package facts
| License | permissive license permissive |
| Python support | Supports the current Python release >=3.9 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | 6 packagesclicklibcstmoreorlesspackagingtomlitrailrunner |
| Maintenance | Actively maintained 275 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 417,754 / month, #6,809 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 3 - AlphaIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseOperating System :: OS IndependentProgramming Language :: PythonProgramming Language :: Python :: 3 :: OnlyTopic :: Software Development :: Libraries :: Python ModulesTopic :: Software Development :: Quality Assurance |
Evidence: fixit-2.2.1-py3-none-any.whl
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See also libcst · rumdl · sphinx-lint · gitlint-core · pytest-pylint · tclint · ruff · salt-lint · wemake-python-styleguide · flake8-pytest-style