/**
 * Saves the reply of a run the server ended because its worker stopped
 * (a crash, a killed function) into the thread, the way a run that finishes
 * saves its own. That worker held the reply only in memory, so without this
 * the turn's finished tool calls exist only in the run ledger, which is
 * pruned, and the thread forgets an email already went out.
 *
 * A run continued in its turn is saved as the first part of that turn's
 * reply; one with nothing after it keeps its error. Nothing is saved once a
 * later turn started or a later prompt was saved, because the reply would
 * land under that prompt instead of its own.
 */
export declare function foldReapedRunIntoThread(runId: string, terminalError?: {
    error: string;
    errorCode: string;
}): Promise<"projected" | "superseded" | "retry">;