Static[iterator]Static[StaticasStaticofStaticpipeStaticserviceStatictoStatictoStaticuseStaticuseReadonly~effect/ReadonlykeyStatic Readonly~effect/StaticIdentifierStatic ReadonlykeyStatic ReadonlyServiceStatic Optional Readonlystack
The platform's checkpointable process state, one value per runtime layer: the parts a checkpoint carries beside the core's own process facts (the navigation, the stack, the telemetry, the session origin, the launch and prism facts). A layer that installs none installs an empty list.
A plain service, not a reference with a default: the checkpoint effects require it, so the platform's userland surface pins it as a requirement and a layer that forgets it fails to compile rather than quietly checkpointing no platform state.