Type Alias: FilterHandler<T>

FilterHandler<T> = (value) => T | Promise<T>

Generic typed hook system for plugin extensibility.

Two hook types:

Filter hooks: transform data through a waterfall chain (each handler receives the previous result and returns a new one).
Action hooks: fire-and-forget side-effect notifications.

Both are strongly typed via TFilterMap and TActionMap type parameters.

Performance: applyFilters / runActions check Map.has() first — zero cost when no handlers are registered for a given hook.

Type Parameters

T

T

T | Promise<T>