import { type TodoTxtSourceRef } from "./normalizer.ts";
export interface RecurResult {
    newId: string;
    newTodoLine: string;
    oldPromptPath: string;
    newPromptPath: string;
}
export interface UpdateOptions {
    todoPath: string;
    ref: TodoTxtSourceRef;
    now?: Date;
    /** Source timezone for hour-unit recurrence wall-clock math. Defaults to UTC. */
    timezone?: string;
}
export declare function withLock<T>(lockPath: string, fn: () => T | Promise<T>): Promise<T>;
type StatusMutation = "in-progress" | "in-review" | "done";
export declare function updateTaskStatus(options: UpdateOptions, newStatus: StatusMutation): Promise<RecurResult | undefined>;
export declare function copyPromptFile(oldPath: string, newPath: string): void;
export declare function validateTodoFile(todoPath: string, tasksDir: string, knownAgents?: ReadonlySet<string>): string[];
export {};
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