import type { Signal } from '@nonoun/native-core';
export interface StoreControllerOptions {
    /** Parse fetch response. Default: `res.json()` */
    parse?: (res: Response) => Promise<Record<string, unknown>>;
}
export declare class StoreController {
    #private;
    readonly loading: Signal<boolean>;
    readonly error: Signal<string | null>;
    constructor(options?: StoreControllerOptions);
    /** Get or create a signal for a key. */
    get<T = unknown>(key: string): Signal<T>;
    /** Set a value (creates signal if needed). */
    set(key: string, value: unknown): void;
    /** Bulk-set from a plain object. */
    setAll(data: Record<string, unknown>): void;
    /** Fetch JSON from URL, populate signals from top-level keys. */
    load(url: string): Promise<boolean>;
    /** Check if a key exists. */
    has(key: string): boolean;
    /** All current keys. */
    keys(): IterableIterator<string>;
    destroy(): void;
}
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