thai-lint
The AI Linter - Catch the mistakes AI coding assistants keep making.
thailint detects anti-patterns that AI tools frequently introduce: duplicate code, excessive nesting, magic numbers, SRP violations, and more. It works across Python, TypeScript, JavaScript, and Rust with unified rules - filling gaps that existing linters miss.
Installation
pip install thailint
Or run instantly with uvx (no install required):
uvx thailint dry src/
Or with Docker:
docker run --rm -v $(pwd):/data washad/thailint:latest --help
Quick Start
# Generate a config file (optional)
thailint init-config
# Run any linter
thailint dry src/
That's it. See violations, fix them, ship better code.
Available Linters
| Linter | What It Catches | Command | Docs |
|---|---|---|---|
| DRY | Duplicate code across files | thailint dry src/ |
Guide |
| Nesting | Deeply nested if/for/while blocks | thailint nesting src/ |
Guide |
| Magic Numbers | Unnamed numeric literals | thailint magic-numbers src/ |
Guide |
| Performance | O(n²) patterns: string += in loops, regex in loops | thailint perf src/ |
Guide |
| SRP | Classes doing too much | thailint srp src/ |
Guide |
| File Header | Missing documentation headers | thailint file-header src/ |
Guide |
| Stateless Class | Classes that should be functions | thailint stateless-class src/ |
Guide |
| Collection Pipeline | Loops with embedded filtering | thailint pipeline src/ |
Guide |
| Method Property | Methods that should be @property | thailint method-property src/ |
Guide |
| File Placement | Files in wrong directories | thailint file-placement src/ |
Guide |
| Lazy Ignores | Unjustified linting suppressions | thailint lazy-ignores src/ |
Guide |
| Improper Logging | Print statements and conditional verbose patterns | thailint improper-logging src/ |
Guide |
| Stringly Typed | Strings that should be enums | thailint stringly-typed src/ |
Guide |
| LBYL | Look Before You Leap anti-patterns | thailint lbyl src/ |
Guide |
| Law of Demeter | Deep object chain access (reaching through objects) | thailint law-of-demeter src/ |
Guide |
| Version Freshness | EOL/outdated runtime versions in infra files | thailint version-freshness . |
Guide |
| Unwrap Abuse | .unwrap()/.expect() that panic at runtime (Rust) |
thailint unwrap-abuse src/ |
Guide |
| Clone Abuse | .clone() abuse: loops, chains, unnecessary (Rust) |
thailint clone-abuse src/ |
Guide |
| Blocking Async | Blocking std:: calls in async functions (Rust) | thailint blocking-async src/ |
Guide |
Configuration
Create .thailint.yaml in your project root:
dry:
enabled: true
min_duplicate_lines: 4
nesting:
enabled: true
max_nesting_depth: 3
magic-numbers:
enabled: true
allowed_numbers: [-1, 0, 1, 2, 10, 100]
Or add a [tool.thailint] section to your pyproject.toml:
[tool.thailint]
dry = {enabled = true, min_duplicate_lines = 4}
nesting = {enabled = true, max_nesting_depth = 3}
magic-numbers = {enabled = true, allowed_numbers = [-1, 0, 1, 2, 10, 100]}
Config precedence: .thailint.yaml > .thailint.json > pyproject.toml.
Or generate one automatically:
thailint init-config --preset lenient # or: strict, standard
See Configuration Reference for all options.
Output Formats
# Human-readable (default)
thailint dry src/
# JSON for CI/CD
thailint dry --format json src/
# SARIF for GitHub Code Scanning
thailint dry --format sarif src/ > results.sarif
Ignoring Violations
# Line-level
timeout = 3600 # thailint: ignore[magic-numbers]
# File-level
# thailint: ignore-file[dry]
Or in config:
dry:
ignore:
- "tests/"
- "**/generated/**"
See How to Ignore Violations for all 5 ignore levels.
CI/CD Integration
# GitHub Actions
- name: Run thailint
run: |
pip install thailint
thailint --parallel dry src/
thailint --parallel nesting src/
Use --parallel for faster linting on large codebases (2-4x speedup on multi-core systems).
Exit codes: 0 = success, 1 = violations found, 2 = error.
Documentation
- Quick Start Guide - Get running in 5 minutes
- Configuration Reference - All config options
- Troubleshooting - Common issues
- Full Documentation - Everything else
Contributing
Contributions welcome! See CONTRIBUTING.md for guidelines.
git clone https://github.com/be-wise-be-kind/thai-lint.git
cd thai-lint
poetry install
just test
License
MIT License - see LICENSE for details.
Support
2 maintainers
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