/**
 * ACM Store - SQLite-backed metadata for pinned and compacted messages.
 *
 * Uses a separate acm.db file alongside opencode.db so we don't touch
 * upstream schema at all.
 */
export interface AcmEntry {
    message_id: string;
    session_id: string;
    pinned: boolean;
    compacted: boolean;
    mkp_name?: string;
}
export declare function getEntry(sessionId: string, messageId: string): AcmEntry | null;
export declare function setEntry(entry: AcmEntry): void;
export declare function pinMessage(sessionId: string, messageId: string): void;
export declare function unpinMessage(sessionId: string, messageId: string): void;
export declare function compactMessage(sessionId: string, messageId: string): void;
export declare function uncompactMessage(sessionId: string, messageId: string): void;
export declare function getPinnedMessages(sessionId: string): string[];
export declare function getCompactedMessages(sessionId: string): Set<string>;
export declare function getSessionEntries(sessionId: string): AcmEntry[];
export declare function setMkp(sessionId: string, messageId: string, mkpName: string): void;
export declare function unloadMkp(sessionId: string, mkpName: string): string | null;
export declare function deleteSession(sessionId: string): void;