import type { ConfigV2 } from "./types.js";
export interface ConfigV2Snapshot {
    readonly generation: number;
    readonly savedAt?: string;
    readonly config: ConfigV2;
    readonly source: "active" | "migrated" | "history";
}
export interface ConfigV2LoadResult {
    readonly status: "missing" | "valid" | "migrated" | "corrupt";
    readonly snapshot?: ConfigV2Snapshot;
    readonly repairRequired: boolean;
    readonly diagnostics: readonly string[];
}
export interface ConfigV2MutationResult {
    readonly changed: boolean;
    readonly generation: number;
    readonly previousGeneration?: number;
    readonly historyPath?: string;
}
/**
 * V2 persistence boundary. Legacy ConfigStore remains available for V1
 * callers; this store migrates an existing V1 config in memory and writes V2
 * only after an explicit V2 save/update.
 */
export declare class ConfigV2Store {
    private readonly root;
    private readonly activeFile;
    private queue;
    constructor(options: {
        readonly root: string;
        readonly activeFile?: string;
    });
    load(): Promise<ConfigV2LoadResult>;
    initialize(config: ConfigV2): Promise<ConfigV2MutationResult>;
    save(config: ConfigV2, options?: {
        readonly expectedGeneration?: number;
    }): Promise<ConfigV2MutationResult>;
    update(mutator: (draft: ConfigV2) => ConfigV2 | void | Promise<ConfigV2 | void>): Promise<ConfigV2MutationResult>;
    restore(generation: number, options?: {
        readonly expectedGeneration?: number;
    }): Promise<ConfigV2MutationResult>;
    private enqueue;
    private loadUnlocked;
    private parseLoaded;
    private readActive;
    private commit;
    private readHistory;
    private pruneHistory;
    private snapshot;
    private assertExpected;
    private isStoredV2;
    private isStoredV1;
}
/** Billing/profile-focused name for callers that do not need the schema term. */
export declare const BillingProfileStore: typeof ConfigV2Store;