aa-jl

atelier-arith-julia-development-skills

Plugin containing Julia development skills for both Claude Code and Codex.

Included Skills

• installing-julia — install the Julia runtime
• generating-julia-package — create Julia project environments and package layouts
• creating-julia-app — create Julia command-line apps with @main and [apps]
• creating-julia-test-env — add a Julia package test environment
• running-julia-test — run standard and faster local Julia test workflows

Installation

Claude Code

/plugin marketplace add atelierarith/atelier-arith-julia-development-skills
/plugin install aa-jl@atelier-arith-julia-development-skills

Session-only (no permanent install):

claude --plugin-dir /path/to/atelier-arith-julia-development-skills
# or
claude --plugin-url https://github.com/atelierarith/atelier-arith-julia-development-skills/archive/main.zip

Codex

If your Codex client supports plugins, add this repository URL in the Codex plugin settings. The manifest is at .codex-plugin/plugin.json.

For local development, add this repository as a local Codex plugin marketplace entry. The Codex plugin name is aa-jl; it is intentionally short so namespaced skill IDs such as aa-jl:finding-latest-julia-version stay under Codex's 64-character skill name limit.

git clone https://github.com/AtelierArith/atelier-arith-julia-development-skills.git ~/.codex/aa-jl
mkdir -p ~/.agents/plugins
python3 - <<'PY'
import json
from pathlib import Path

marketplace = Path.home() / ".agents" / "plugins" / "marketplace.json"
plugin_path = Path.home() / ".codex" / "aa-jl"
entry = {
    "name": "aa-jl",
    "source": {"source": "local", "path": str(plugin_path)},
    "policy": {"installation": "AVAILABLE", "authentication": "ON_INSTALL"},
    "category": "Developer Tools",
}

if marketplace.exists():
    data = json.loads(marketplace.read_text())
else:
    data = {
        "name": "local-codex-plugins",
        "interface": {"displayName": "Local Codex Plugins"},
        "plugins": [],
    }

data["plugins"] = [p for p in data.get("plugins", []) if p.get("name") != "aa-jl"]
data["plugins"].append(entry)
marketplace.write_text(json.dumps(data, indent=2) + "\n")
PY

Then install aa-jl from the local Codex plugin marketplace and restart Codex so it reloads the skill list.

Repository Structure

.
├── .claude-plugin/
│   ├── plugin.json       # Claude Code plugin manifest
│   └── marketplace.json  # Claude Code marketplace manifest (references this repo)
├── .codex-plugin/
│   └── plugin.json       # Codex plugin manifest
├── AGENTS.md
├── CLAUDE.md
├── LICENSE
├── README.md
├── plans/
└── skills/
    ├── creating-julia-app/
    │   └── SKILL.md
    ├── creating-julia-test-env/
    │   └── SKILL.md
    ├── generating-julia-package/
    │   └── SKILL.md
    ├── installing-julia/
    │   └── SKILL.md
    └── running-julia-test/
        └── SKILL.md

Adding a New Skill

1. Create skills/<skill-name>/SKILL.md with YAML frontmatter:

   ---
   name: <skill-name>
   description: Use when ...
   ---
   

2. Bump version in .claude-plugin/plugin.json, .claude-plugin/marketplace.json, and .codex-plugin/plugin.json.