import type { Task } from "../tool/types.js";

/**
 * Canonical state for the todo tool. Single source of truth — both the reducer
 * (`state/state-reducer.ts`) and the live store cell (`state/store.ts`) read
 * this shape. Replay (`state/replay.ts`) returns a fresh `TaskState`; the
 * lifecycle handlers in `index.ts` write it via `replaceState`.
 *
 * The shape is intentionally minimal — no derived caches or runtime cells.
 * Selectors in `state/selectors.ts` are pure of `TaskState` and own all
 * derivations (visible/grouped/counted/etc).
 */
export interface TaskState {
	tasks: Task[];
	nextId: number;
}

export const EMPTY_STATE: TaskState = { tasks: [], nextId: 1 };