/**
 * Enumeration of possible orchestration execution statuses.
 *
 * Determines whether an orchestration is executing normally or has encountered
 * a terminal failure requiring error event emission.
 */
export declare const OrchestrationExecutionStatus: {
    /** Orchestration is executing normally */
    readonly NORMAL: "normal";
    /** Orchestration has failed and entered terminal error state */
    readonly FAILURE: "failure";
    /** Orchestration is marked as done */
    readonly DONE: "done";
};
/**
 * Discriminated union representing persisted orchestration state.
 *
 * The execution status discriminates between normal execution state (containing
 * full orchestration data) and failure state (containing minimal error context).
 *
 * **Normal state**: Contains complete orchestration data including machine state,
 * event history, and all custom fields from type parameter T.
 *
 * **Failure state**: Contains only essential error information (error object, subject)
 * with partial custom fields. Once in failure state, the orchestration ignores
 * subsequent events and does not execute further.
 *
 * @template T - Custom state fields specific to the orchestration type
 */
export type OrchestrationExecutionMemoryRecord<T extends Record<string, unknown>> = (T & {
    __type: 'OrchestrationExecutionMemoryRecord';
    executionStatus: typeof OrchestrationExecutionStatus.NORMAL | typeof OrchestrationExecutionStatus.DONE;
}) | (Partial<T> & {
    __type: 'OrchestrationExecutionMemoryRecord';
    executionStatus: typeof OrchestrationExecutionStatus.FAILURE;
    error: Error;
    subject: string;
});