import type { WorkerDrainOptions, WorkerHealth, WorkerInfo } from './types.ts';
/** A drain marker: when it started and an optional operator-supplied reason. */
export type DrainRecord = {
    reason?: string;
    startedAt: number;
};
export declare function createDrainRecord(options?: WorkerDrainOptions): DrainRecord;
/**
 * The drain record covering `worker`: its own explicit marker if set,
 * otherwise its deployment's marker (when the worker declares a deployment).
 */
export declare function drainRecordForWorker(worker: WorkerInfo, deploymentDrainStates: ReadonlyMap<string, DrainRecord>): DrainRecord | undefined;
export declare function isWorkerDraining(worker: WorkerInfo, deploymentDrainStates: ReadonlyMap<string, DrainRecord>): boolean;
export declare function workerHealth(worker: WorkerInfo, deploymentDrainStates: ReadonlyMap<string, DrainRecord>): WorkerHealth;