IronLint: Checks Your Coding Agent Can't Skip

Every edit your agent makes runs your checks first. Any nonzero exit blocks the write. Fully local, built with Rust.

Install · Connect your agent · Configuration · What it does · Why This Works · Architecture · Docs

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IronLint is a local policy gate for agentic coding harnesses. GitHub Actions runs your checks in the cloud after you push; IronLint runs the same kind of checks locally, on every edit your agent makes, **before the code lands on disk, and it can refuse.** A check is a file glob plus a shell command. IronLint hands that command your proposed content on stdin and reads one thing back: the exit code. Any nonzero exit (1–125) blocks the write. No engines, no severities, no output parsing.

One YAML file at `.ironlint.yml` in your repo root. A map of checks; each na