Just Command Runner

Overview

Expert guidance for Just, a command runner with syntax inspired by make. Use this skill for creating justfiles, writing recipes, configuring settings, and implementing task automation workflows.

Targets just v1.55.0 (latest stable, released 2026-06-29). Features are tagged with the version that introduced them (e.g. v1.51.0+); a tag newer than your installed just --version means you must upgrade to use it. List features (set lists) and other gated capabilities additionally require set unstable.

Key capabilities:

• Create and organize justfiles with proper structure
• Write recipes with attributes, dependencies, and parameters
• Configure settings for shell, modules, and imports
• Use built-in constants for terminal formatting
• Implement check/write patterns for code quality tools

No Justfile Formatter

Do not use just --fmt or just --dump. The user has bespoke formatting preferences that the built-in formatter does not respect. Preserve existing formatting as-is.