justfile

Generate and manage justfile command runners across multiple ecosystems.

2|Updated Sep 12, 2016
One-click install
npx skills add https://github.com/paulnsorensen/dotfiles --skill justfile-paulnsorensen
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: justfile
Source: https://github.com/paulnsorensen/dotfiles/tree/main/claude/skills/justfile
Command: npx skills add https://github.com/paulnsorensen/dotfiles --skill justfile-paulnsorensen

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Generate or migrate to a justfile (casey/just command runner) for any project. Use this skill when the user asks to add a justfile, replace a Makefile, set up project commands, create task runners, or mentions "just" in the context of build/dev workflows. Also trigger when you see a project with a Makefile that would benefit from just's simpler syntax, or when setting up a new project that needs common dev commands (build, test, lint, fmt). Covers Rust, Python, TypeScript/JavaScript, Go, and Ruby ecosystems. Do NOT use for CI pipeline configuration, Dockerfiles, or actual build system setup (cargo, webpack, etc.).

Core Features & Use Cases

  • Generate idiomatic justfiles for any project. Replace Makefiles and ad-hoc shell scripts with a clean, discoverable command runner.
  • Detect the project ecosystem and map common tasks into just recipes
  • Migrate or preserve existing targets from Makefiles or scripts, while aligning with just's module and settings system to improve discoverability.

Quick Start

Run just in the project root to see available recipes and start migrating or creating a justfile.

Frequently Asked Questions about justfile

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I replace a Makefile with a justfile for my project?

To replace a Makefile with a justfile, you can generate an idiomatic justfile that migrates and preserves existing Makefile targets. This maps your current build, test, and lint commands into clean, discoverable just recipes.

What is a justfile used for in dev workflows?

A justfile is used in dev workflows to define and manage project command runners, simplifying repetitive tasks. It provides a clean, discoverable alternative to ad-hoc shell scripts and complex Makefiles for automating recipes.

Can I use a justfile for Python and TypeScript projects?

Yes, you can use a justfile for Python and TypeScript projects. The justfile command runner supports diverse ecosystems including Rust, Python, TypeScript/JS, Go, and Ruby by detecting the project environment and mapping common tasks.

What's the best way to organize justfile recipes as a project grows?

The best way to organize growing justfile recipes is by using just's module system to structure commands logically. This approach improves discoverability and manages workflow expansion by modularizing recipes and enforcing clear documentation.

When should I not use a justfile for project automation?

You should not use a justfile for configuring CI pipelines, Dockerfiles, or actual build systems like cargo or webpack. It is designed strictly for simplifying project workflows and dev commands, not for replacing underlying build system setups.