import type { PhaseGraph } from './types.js';
export interface PhaseStoreOptions {
    baseDir: string;
}
/**
 * PhaseStore - persistence layer for saving and loading PhaseGraph objects on disk.
 */
export declare class PhaseStore {
    readonly baseDir: string;
    constructor(opts: PhaseStoreOptions);
    save(graph: PhaseGraph): Promise<void>;
    load(graphId: string): Promise<PhaseGraph | null>;
    delete(graphId: string): Promise<void>;
    list(): Promise<Array<{
        id: string;
        title: string;
        updatedAt: number;
        status: string;
    }>>;
    private getFilePath;
    private serializeGraph;
    private serializePhase;
    private serializeTaskGraph;
    private serializeTaskNode;
    private deserializeGraph;
    private deserializePhase;
    private deserializeTaskGraph;
}
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