/**
 * Type-guard helpers for the dispatch-record upgrade path.
 * C wave 1 / slice c1 (leaf c1w1-record-upgrade): extracted verbatim from
 * `dispatch-record-upgrade.ts` so the reader module clears the line cap.
 * Behavior is byte-identical to the previous in-file definitions; the
 * `isDispatchStatus` / `isOutcome` re-export from the upgrade module keeps
 * every existing importer (e.g. `dispatch-record-writer.ts`) resolving them
 * at the original path.
 */
import type { DispatchOutcome, DispatchRecordStatus, Heartbeat } from './dispatch-record-types.js';
export declare function isObject(v: unknown): v is Record<string, unknown>;
export declare function stringField(obj: Record<string, unknown>, key: string): string;
export declare function isValidHeartbeat(v: unknown): v is Heartbeat;
export declare function isDispatchStatus(v: unknown): v is DispatchRecordStatus;
export declare function isOutcome(v: unknown): v is DispatchOutcome;