import { type ProgramIO } from '../cli-helpers.js';
/** One refusal from the `--from-dag` path, as the fields the envelope needs. */
export type DagFailure = {
    readonly role: string;
    readonly code: string;
    readonly message: string;
    readonly extra?: Record<string, unknown>;
    readonly nextActions: readonly string[];
};
/**
 * Emit a `sub-agent.dispatch` failure envelope and mark the process failed.
 *
 * Returns `null` so every caller can read `if (readDag(...) === null) return;`
 * — the three statements (print, exit code, return) are one decision and stay
 * together, which is also what keeps each call site inside
 * `max-lines-per-function`.
 */
export declare function emitDagFailure(io: ProgramIO, asJson: boolean, failure: DagFailure): null;