import { type PlanSpec } from "../contracts/spec.js";
/**
 * Save a plan spec to disk.
 * Overwrites any existing spec with the same id.
 */
export declare function saveSpec(projectRoot: string, spec: PlanSpec): Promise<void>;
/**
 * Load a plan spec by id.
 * Throws if not found or invalid.
 */
export declare function loadSpec(projectRoot: string, id: string): Promise<PlanSpec>;
/**
 * Load the most recently created spec (by `createdAt` field).
 * Returns null if no specs exist.
 */
export declare function loadLatestSpec(projectRoot: string): Promise<PlanSpec | null>;
/**
 * List all saved specs, sorted by filename.
 */
export declare function listSpecs(projectRoot: string): Promise<PlanSpec[]>;
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