stagelintLint and format staged files before every commit

One fast binary that never aborts a commit over unstaged changes. Runs the same config in coding agent hooks and CI.

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Never blocked by conflicts

When a formatter's output conflicts with your unstaged changes, stagelint three-way merges instead of failing the run.

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Written in Rust, stagelint is faster than pre-commit, lint-staged, Lefthook and nano-staged. Benchmarks are on GitHub.

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No runtime to install. The same tool in Node, Python, Go, Rust or a polyglot monorepo.

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Run the same checks over what Claude Code, Codex or Cursor just changed, and hand failures back for the agent to fix.