About Flint
Flint is a fast, simple lint runner that doesn't slow down your AI coding.
- Fast — native execution (no Docker), parallel, diff-aware (changed files only), opt-in (undeclared tools don't run), small binary cached by mise
- Local + CI aligned — one binary, one config model, local defaults tuned for day-to-day work and broader coverage in CI
- Sensible defaults — flint init scaffolds a working setup quickly, and most repos can stick with the generated defaults
- Opinionated config — Flint chooses canonical config filenames per linter, while still letting you keep them in a directory such as .github/config
- AI-friendly — quiet by default: clean runs print nothing, --fix surfaces only what still needs action
- Separated ownership — dedicated linters and formatters own their file types to avoid overlapping rules and editor-config conflicts
- Predictable and updatable linter versions — lint behavior stays stable until the repo intentionally updates pinned linter versions, for example via Renovate updates to mise.toml
- Cross-platform — Linux, macOS, Windows
- Autofix — --fix fixes what's fixable; reports what still needs review
