just

name

just

description

just is a handy command runner for saving and running project-specific commands. Features include recipe parameters, .env file loading, shell completion, cross-platform support, and recipes in arbitrary languages. This skill is triggered when the user says things like "create a justfile", "write a just recipe", "run just commands", "set up project automation with just", "understand justfile syntax", or "add a task to the justfile".

just - Command Runner

just is a command runner that lets you save and run project-specific commands (called recipes) in a justfile. It's similar to make but focused purely on running commands, not building software.

Documentation Files

This skill includes the complete official documentation from the just repository:

• README.md - Comprehensive documentation including installation, syntax reference, features, and examples (this is the primary reference)
• GRAMMAR.md - Formal grammar specification for justfile syntax
• CHANGELOG.md - Version history and release notes
• CONTRIBUTING.md - Contribution guidelines
• LICENSE - CC0 1.0 Universal license
• examples/ - Example justfiles for various use cases

Quick Reference

Basic Justfile Structure

# This is a comment
variable := "value"

# Recipe with no dependencies
recipe-name:
    echo "Running recipe"

# Recipe with dependencies
build: clean compile
    echo "Build complete"

# Recipe with parameters
greet name:
    echo "Hello, {{name}}!"

# Recipe with default parameter
serve port="8080":
    python -m http.server {{port}}

Running Recipes

just                    # Run default recipe (first in file)
just recipe-name        
just recipe arg1 arg2   
just --list             
just --show recipe      
just --dry-run recipe   
just --choose