just

Judgement

What it is

Developer tool

What it does

A command runner that saves project-specific commands as recipes in a justfile with make-like syntax, without make's build-system quirks.

Adopt it when

A project has a pile of shell commands for build, test and deploy that you want named, documented and runnable the same way on every OS.

Watch out

It does not track file changes like make, so it is not a build system.

Ready for

Production-ready

Runs as

Command line

Built with

Rust

How established

Established: started 10 years ago, latest release 1.59.0.

What the license allows

You can take the code into anything, including a product you sell, with no conditions.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: just → Rust → runs on a microchip

How compilers were built, back to punched paper tape

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