export declare class RuntimeConfigStore {
    private overrides;
    constructor();
    get(key: string): string | null;
    getAll(): Record<string, string>;
    getRawApiKey(): string | null;
    set(key: string, value: string): {
        previous: string | null;
        current: string;
    };
    isSettable(key: string): boolean;
    private persist;
    private loadPersisted;
}
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