Julia Development Skills for Claude Code

A collection of Claude Code skills for Julia package development, following modern best practices and conventions.

Skills Overview

Package Development

Skill	Description
julia-package-dev	Develop Julia packages, multi-package workspaces, extensions, and Pkg apps

Documentation

Skill	Description
julia-docs	Build documentation with Documenter.jl, docstrings, doctests, and citations

Testing & Quality

Skill	Description
julia-tests	Run and write tests with Test.jl, TestItemRunner.jl, and ParallelTestRunner.jl

Static Analysis

Skill	Description
julia-jet	JET.jl overview, error analysis, optimization analysis, and configuration

Performance

Skill	Description
julia-perf	Optimize Julia code for performance
julia-bench	Quick benchmarks, benchmark suites, result comparison, and benchmark CI

Concurrency

Skill	Description
julia-async	Asynchronous programming with Julia tasks/channels
julia-threads	Multithreading patterns and thread safety in Julia

Data Serialization

Skill	Description
julia-toml	Parse and write TOML files with Julia TOML stdlib
julia-yaml	Parse and write YAML files with YAML.jl

Tabular Data

Skill	Description
julia-csv	Parse and write CSV files with CSV.jl
julia-prettytables	Render text/markdown/HTML tables with PrettyTables.jl

Version Control

Skill	Description
julia-github	Git and GitHub CLI workflows
github-act	Run and debug GitHub Actions locally with `gh act`

CLI Development

Skill	Description
julia-comonicon	Build Julia CLI interfaces with Comonicon.jl

Data Storage

Skill	Description
julia-scratch	Manage mutable scratch spaces with Scratch.jl

System Integration

Skill	Description
julia-external-cmd	Run external programs safely from Julia

Visualization

Skill	Description
julia-makie-recipes	Create custom Makie plot recipes

Terminal UI

Skill	Description
julia-term	Terminal output, layouts, renderables, progress bars, and TUI apps with Term.jl

Utilities

Skill	Description
whitespace	Fix trailing whitespace and newlines

Usage

These skills are automatically available when working in projects that include this .agents/skills/ directory. The agent will use the appropriate skill based on the task context.

Skill Header Format

Each skill uses YAML frontmatter for metadata:

---
name: skill-name
description: Brief description of when to use this skill.
---

Skill Dependencies

Many skills reference each other. Key relationships:

julia-package-dev
├── julia-tests (for package test setup and execution)
├── julia-docs (for package docs and doctests)
├── julia-comonicon (full CLI framework)
└── julia-makie-recipes (extension use case)

julia-docs
└── julia-tests (for running doctests in the test suite)

julia-bench
└── julia-perf (performance diagnosis before or after benchmarking)

julia-comonicon
├── julia-package-dev (for package workflows)
└── julia-toml (for Project.toml configuration)

julia-threads
└── julia-async (for task-level coordination)

julia-external-cmd
└── julia-async (for subprocess IO with tasks)

julia-toml
└── julia-package-dev (for Project.toml and config workflows)

julia-yaml
└── julia-package-dev (for YAML config workflows)

julia-prettytables
└── julia-csv (common ingestion source in table workflows)

julia-jet
├── julia-perf (performance optimization)
└── julia-tests (JET test templates)

julia-tests
├── julia-docs (doctest authoring and Documenter setup)
├── julia-perf (performance workflow)
└── julia-jet (static analysis in test suites)

julia-scratch
├── julia-package-dev (for package development workflows)
└── julia-toml (for version-specific scratch key patterns)

Contributing

When adding or modifying skills:

Include YAML frontmatter with name and description
Add a "Related Skills" section linking to relevant skills
Include practical examples and code snippets
Keep content focused and actionable
Update this README when adding new skills

Name	julia-multipackage
Description	Work with multiple inter-related Julia packages simultaneously, managing dependencies across packages and testing changes together. Use this skill when developing packages that depend on each other.

julia-multipackage

SKILL.md