Module lifecycle 

Lifecycle events and observer hooks at the runtime boundary.

Fragment: lifecycle-observer-seam

The lifecycle surface exists before the runtime fully uses it because observability is part of the public direction of Pureflow, not an afterthought. The current seam is intentionally thin: it names the events that matter and leaves registration, fan-out, and buffering policy to later runtime beads.

Fragment: lifecycle-event-vocabulary

The event kinds are phrased around runtime transitions rather than around implementation details. That keeps the vocabulary stable if the execution engine changes from a sequential scaffold to structured concurrency later.

Structs

LifecycleEvent

Runtime lifecycle event with the context needed by observers.

NoopLifecycleHook

Default lifecycle hook that intentionally records nothing.

Enums

LifecycleEventKind

Lifecycle event emitted at runtime boundaries.

Traits

LifecycleHook

Observer hook for runtime lifecycle transitions.