/** Content-free, in-memory diagnostic scopes. These never establish stop proof. */
export declare const ADAPTER_EXECUTION_PHASES: readonly ["host_execution", "adapter_execution", "end_session", "cancel_turn", "close_session", "settle_reuse", "stop_transport", "sync_back", "instruction_collection", "workspace_restore", "phase_reporting", "instruction_cleanup", "lease_release"];
export type AdapterExecutionPhase = (typeof ADAPTER_EXECUTION_PHASES)[number];
export type AdapterExecutionPhaseSink = (phase: AdapterExecutionPhase) => (() => void) | void;
export declare function isAdapterExecutionPhase(value: unknown): value is AdapterExecutionPhase;
/** A broken diagnostic sink must not change execution or teardown outcomes. */
export declare function withAdapterExecutionPhase<T>(context: {
    onExecutionPhase?: AdapterExecutionPhaseSink;
}, phase: AdapterExecutionPhase, operation: () => T | Promise<T>): Promise<T>;
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