export declare class TimeoutError extends Error {
    readonly timeoutMs: number;
    constructor(timeoutMs: number);
}
export declare class CancelledError extends Error {
    constructor(message?: string);
}
/**
 * Thrown when a runner writes to a run bundle after losing its queue claim.
 * The current claim holder owns the run from that point on, so the fenced
 * writer must stop touching the bundle immediately.
 */
export declare class ClaimLostError extends Error {
    readonly runId: string;
    constructor(runId: string);
}
/**
 * Internal stop signal for close-to-park: the engine halts without writing
 * a terminal event, leaving a resumable bundle for the next claim holder.
 */
export declare class RunParkedError extends Error {
    constructor();
}
export declare function isRunParkedError(error: unknown): error is RunParkedError;
/** The workflow source changed after the run started; resume needs force. */
export declare class WorkflowSourceChangedError extends Error {
    readonly runId: string;
    constructor(runId: string);
}
export declare function isClaimLostError(error: unknown): error is ClaimLostError;
export declare function isAbortLikeError(error: unknown): boolean;
export declare function errorMessage(error: unknown): string;