Singleton
End-to-end walkthrough for the singleton class — declare a kind, write a plugin, pick the active one, handle conflicts.
Broadcast-collect
End-to-end walkthrough for the broadcast-collect class — every plugin of the kind is called, results are aggregated, fail-fast vs best-effort.
Broadcast-notify
End-to-end walkthrough for the broadcast-notify class — fire-and-forget events, multiple independent subscribers, failure handling.
Chain
End-to-end walkthrough for the chain class — sequential data transformation through a plugin chain, abort, and the middleware pattern.
Capability
End-to-end walkthrough for the capability class — dispatch by input type, supports_* declarations, fallback, contract requirements for the fallback plugin.