Installation

Get Arnold running in one command. No API key, no database, no runtime dependencies.

Shell script (recommended)

Run this from your project's root directory:

This copies command files into .claude/commands/arnold/ and appends Arnold's development rules to your project's CLAUDE.md. No binaries, no dependencies, no background processes.

From a cloned repo

If you downloaded or cloned Arnold locally:

cd /path/to/your-project
bash /path/to/Arnold/install.sh

The script detects it's running from a local repo and copies commands directly, no network required.

Claude Code plugin

If you prefer the plugin install (auto-updates):

/install ArtifactHQ/Arnold

To uninstall: /uninstall ArtifactHQ/Arnold

Other AI coding agents

Arnold follows the Agent Skills standard and works with 30+ agents. Copy the skill folders from skills/ into your project:

• Cursor: .cursor/rules/arnold.md
• Windsurf: .windsurf/rules/arnold.md
• Gemini CLI: GEMINI.md
• Codex: AGENTS.md

Arnold's development rules are in CLAUDE.md. For other tools, copy this content to your tool's equivalent configuration file.

Updating

Re-run the same install command you used originally. The script detects your current version and upgrades in place. Your docs/ folder is untouched, only the command files are replaced.

What install.sh does

The install script does two things:

1. Copies command files into .claude/commands/arnold/ inside your project
2. Appends Arnold's development rules to your project's CLAUDE.md (creating one if it doesn't exist)

That's it. No binaries, no dependencies, no background processes.

Next steps

Now that Arnold is installed, head to Your First 5 Minutes to set up your first project.