export type MarkQaInitiatedOptions = {
    projectRoot: string;
    sessionId: string;
};
export type MarkQaInitiatedResult = {
    /** Absolute path of the marker. */
    path: string;
    /** `true` only on the call that created the file; `false` when it already existed. */
    created: boolean;
};
/**
 * Create `.peaks/_runtime/<sessionId>/qa/.initiated` if it is absent.
 *
 * Idempotent by construction: the create is a single `O_EXCL` write (`flag:
 * 'wx'`), so an existing marker — including one carrying bytes — is never
 * truncated, and a concurrent caller sees `EEXIST` rather than a second write.
 * The marker's content is the empty string, matching the shape `request init`
 * has always produced.
 *
 * This function touches nothing under `qa/requests/`: the request artifact is
 * the caller's, and this verb exists so it never has to be deleted or rewritten
 * to reach the marker.
 */
export declare function markQaInitiated(options: MarkQaInitiatedOptions): Promise<MarkQaInitiatedResult>;