Namespace DotBoxD.Plugins.Runtime.Hooks

HookStage<TEvent, TCurrent, TContext>: A re-typed stage in a hook chain after a HookPipeline<TEvent>.Select. It carries a composed projection of the original event to the element currently flowing (TCurrent) plus a short-circuit flag, so Where/Select compose without re-keying the pipeline (it stays keyed by TEvent). Terminals re-run the projection per publish and short-circuit when a Where rejected the element. Every fluent method offers both the (element, context) and element-only lambda arities, chosen independently per stage.

RemoteLocalHandlerRegistry: Client-side registry for remote RunLocal terminals. A remote server.Hooks.On<TEvent>().Where(..).Select(..).RunLocal(λ) chain lowers only its Where/Select stages to verified IR that filters and projects server-side; the projected value is pushed back over the control-plane callback per passing event. This registry holds the native RunLocal delegate (real host C#, never lowered), keyed by the subscription id returned at install time, and decodes each pushed payload back to the projected CLR type before invoking that delegate.

RemoteLocalPush: Delivers an encoded, filtered+projected value to the plugin's native RunLocal delegate across the control-plane callback. The server-side pipeline invokes this once per event that passes the lowered filter; the implementation forwards projectedValue over the IPC boundary keyed by subscriptionId. Transport-agnostic so the pipeline does not depend on the RPC layer.