Package-level declarations

Backend contract for an authentication ceremony with opaque state and application output.

Failures that the generic flow can classify without owning application/backend semantics.

Completion value or deliberately classified platform/concurrency failure.

Server-owned continuation state and options returned when a ceremony starts.

Stateless ceremony orchestration that carries opaque backend state from start through finish. Backend and callback exceptions deliberately propagate to the application.

Lifecycle phase of a passkey ceremony.

Backend contract for a registration ceremony with opaque state and application output.