How Skills are loaded

When you specify Skills in a container:

1. Metadata discovery: Claude sees metadata for each Skill (name, description) in the system prompt.
2. File loading: Skill files are copied into the container at /skills/\{skill-name\}/. The directory is the Skill's name (pptx for an Anthropic Skill, the SKILL.md name for a custom Skill), not its skill_01... ID.
3. Automatic use: Claude automatically loads and uses Skills when relevant to your request.
4. Composition: Multiple Skills compose together for complex workflows.

Claude loads full Skill instructions only when needed.

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