Skills

A skill is a packaged set of instructions an AI coding agent loads for a kind of task. The HarperHarbor skills describe app integration, MCP connections and card authoring requirements. They provide workflows and validation checks alongside the API reference.

Note

The skills repository is being published as HarperHarbor/skills. Until it is public, the same content lives in the Moonloom guidance that ships with the card-writer MCP plugin.

Skills

Skill	Use it when	What it carries
harperharbor-integrate	building an app on the platform	client registration, PKCE flow, the language header, error handling, the two-list rule for greetings, save limits
harperharbor-mcp	connecting an AI client	server URL, OAuth challenge handling, the read-before-write rule, cost awareness
harperharbor-card-author	writing or fixing a card	field limits per language, worldbook entry shape, the validate → publish loop, what review rejects

Install

Use these commands once you have access to the skills repository. If it is not yet available, use the Moonloom guidance described above.

Claude Code

git clone https://github.com/HarperHarbor/skills ~/.claude/skills/harperharbor

Skills are discovered from ~/.claude/skills/*/SKILL.md. Restart the session; the skills appear in the list and load when the task matches.

Codex

git clone https://github.com/HarperHarbor/skills .agents/skills/harperharbor

Codex discovers skills under .agents/skills/.

Write your own

A skill is a directory with a SKILL.md whose front matter has a name and a one-line description that says when to use it. Keep the body to what the agent needs to act: the workflow, the limits, the failure cases and what to do about them. Do not paste the API reference into a skill; link to it.