Skills System

Source: src/skills/ — bundledSkills.ts, loadSkillsDir.ts, bundled/

Overview

Skills are extended command definitions that package prompts, tool configurations, and workflows into reusable units. They can be invoked via slash commands.

Bundled Skills

Claude Code ships with 17+ bundled skills in src/skills/bundled/:

Skill	Description
`commit`	AI-assisted git commits
`claude-api`	Build apps with Claude API/SDK
`keybindings`	Customize keyboard shortcuts
`simplify`	Review and simplify code
`loop`	Run commands on recurring intervals
`remember`	Save information to memory
`skillify`	Create new skills
`batch`	Batch operations

Skill Structure

A skill definition includes:

name — Identifier for invocation
description — What the skill does
prompt — The prompt template that gets expanded
triggers — When to suggest this skill
tools — Tools the skill needs access to

Loading Skills

Skills are loaded from two sources:

Bundled (bundledSkills.ts) — Built into the application
Custom (loadSkillsDir.ts) — Loaded from user’s skill directories

Invocation

Skills are invoked through the Skill tool or via slash commands:


/commit        # Invokes the commit skill
/simplify      # Invokes the simplify skill

When invoked, the skill’s prompt is expanded with context and executed as if the user had typed it directly.