import { Task, TaskStatus } from "../../models/task.cjs";
//#region src/services/invariants/index.d.ts
/**
 * Collapse a malformed snapshot to one row per task id.
 *
 * Normal writes replace tasks in place, but older or externally edited stores
 * can contain both a stale and a current copy. Prefer the copy with the newest
 * ISO update timestamp; equal or missing timestamps use the later array entry.
 * The winning row keeps the id's original position so repair does not reorder
 * an otherwise stable task list.
 */
export declare function canonicalizeTasks(tasks: readonly Task[]): Task[];
/**
 * Allowed forward transitions per source status.
 *
 * `failed` is recoverable (a delegation can be retried) so it may return to
 * pending or in_progress. `completed` is one-way to `deleted`; `deleted` is a
 * terminal tombstone.
 */
export declare const VALID_TRANSITIONS: Record<TaskStatus, ReadonlySet<TaskStatus>>;
export declare function isTransitionValid(from: TaskStatus, to: TaskStatus): boolean;
//#endregion
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