export type BuiltinConversation = 'self' | 'arko' | 'harness';
export type BuiltinPins = Partial<Record<BuiltinConversation, number>>;
/** Local display preferences only; never persist message contents or access references. */
export declare class BuiltinDirectoryPreferences {
    private storage;
    private durable;
    private listeners;
    constructor(storage: () => Pick<Storage, 'getItem' | 'setItem'> | undefined, durable?: boolean);
    subscribe: (listener: () => void) => () => void;
    invalidate: () => void;
    snapshot: (account: string) => string;
    read(account: string): BuiltinPins;
    pin(account: string, entry: BuiltinConversation, pinned: boolean): void | Promise<void>;
}
export declare function parseBuiltinPins(value: string): BuiltinPins;
export declare const builtinDirectoryPreferences: BuiltinDirectoryPreferences;
export declare function useBuiltinDirectoryPins(account: string): string;
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