Module registry 

ToolRegistry and SkillRegistry — composition surfaces.

Both registries are append-only at runtime and indexed by name. Agents reference entries by name and never own them; the same skill or tool instance can be shared across any number of agents.

Structs

SkillRegistry

Registry of named Skills. Identical structure to ToolRegistry.

ToolRegistry

Registry of named Tools. Cheap to clone (Arc-backed).

Enums

KernelError