import type { TodoItem, TodoSnapshot, TodoUpdate, TodoWriteDetails } from "./todo-state.js";
export declare function createEmptyTodoSnapshot(): TodoSnapshot;
export declare function normalizeTodoContent(content: string): string;
export declare function applyTodoUpdates(snapshot: TodoSnapshot, updates: TodoUpdate[]): TodoSnapshot;
export declare function formatTodoSummary(items: TodoItem[]): string;
export declare function countTodoProgress(items: TodoItem[]): {
    completed: number;
    total: number;
};
export declare function restoreTodoSnapshot(detailsList: Array<TodoWriteDetails | undefined>): TodoSnapshot;
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