import { type TodoRemoval, type TodoState, type TodoTask } from "./todo-contract.ts";
export interface TodoMutation {
    baseRevision?: number;
    tasks: TodoTask[];
    remove?: TodoRemoval[];
}
export type TodoMutationResult = {
    ok: true;
    state: TodoState;
    changed: boolean;
} | {
    ok: false;
    error: string;
};
export declare function applyTodoMutation(current: TodoState, mutation: TodoMutation): TodoMutationResult;
export declare function renderTodoPlan(state: TodoState): string;
export declare function renderTodoContext(state: TodoState): string;