Metadata for a skill per Agent Skills spec.
interface LoaderSkillMetadataOptional: Space-delimited list of pre-approved tools
Optional: Environment requirements (max 500 chars)
Description of what the skill does (max 1024 chars)
Optional: License name or reference to bundled license file
Optional: Arbitrary key-value mapping for additional metadata
Name of the skill (max 64 chars, lowercase alphanumeric and hyphens)
Absolute path to the SKILL.md file
Source of the skill ('user' or 'project')