/** Stable local presentation state. False pins remain stored so migration cannot resurrect them. */
export interface LocalDirectoryPreference {
    pinned: boolean;
    pinnedAt: number;
    removal?: {
        at: number;
        sequences: Record<string, number>;
    };
}
export type LocalDirectoryPreferences = Record<string, LocalDirectoryPreference>;
export declare function validDirectoryPreferenceKey(key: string): boolean;
export declare function normalizeLocalDirectoryPreferences(input: unknown): LocalDirectoryPreferences;
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