import type { Flow } from '../../types/flow.js';
import type { RunFlowRef, RunState } from './types.js';
export type FlowDriftRecovery = 'restart' | 'abandon';
export declare class FlowDriftError extends Error {
    readonly name = "FlowDriftError";
    readonly runId: string;
    readonly flowName: string;
    readonly parkedNode: string;
    readonly expectedDigest: string;
    readonly actualDigest: string;
    readonly recovery: readonly FlowDriftRecovery[];
    constructor(fields: {
        runId: string;
        flowName: string;
        parkedNode: string;
        expectedDigest: string;
        actualDigest: string;
    });
}
export declare function stampActiveFlow(run: RunState, flow: Flow): Promise<void>;
export declare function clearFlowPin(run: RunState): void;
export declare function clearActiveFlow(run: RunState): void;
export declare function captureFlowPin(run: RunState): {
    flowDigest?: string;
    flowRef?: RunFlowRef;
};
export declare function restoreFlowPin(run: RunState, pin: {
    flowDigest?: string;
    flowRef?: RunFlowRef;
}): void;
/**
 * Parked resume is fail-closed against a new definition. A missing stamp is
 * a legacy run — classify, don't break. The stamp is not caller-supplied
 * authority: this compares what we wrote on entry to a digest we recompute
 * from the live flow.
 */
export declare function assertParkedFlowDigest(run: RunState, flow: Flow): Promise<void>;