/**
 * @module memory/hermes-bridge
 * @description Cross-session integration with Hermes Agent session database.
 *
 * If the user has Hermes Agent installed (detected via ~/.hermes/ directory),
 * the memory subsystem can query Hermes session history for cross-session
 * context. This enables the agent to recall relevant conversations from
 * previous Hermes sessions while keeping the data local.
 *
 * If Hermes is not installed, all bridge functions return empty results —
 * the memory subsystem operates standalone.
 */
/**
 * @name HermesBridge
 * @description Bridges the SAP MCP memory subsystem with Hermes Agent session data.
 *
 * Detection: checks for ~/.hermes/ directory. If present, the bridge can query
 * the Hermes SQLite session database for relevant past conversations.
 */
export declare class HermesBridge {
    private readonly hermesDir;
    private readonly legacyDbPath;
    private readonly stateDbPath;
    private available;
    constructor(hermesDir?: string);
    /**
     * @name isAvailable
     * @description Checks whether Hermes Agent is installed on this machine.
     * Caches the result to avoid repeated filesystem checks.
     */
    isAvailable(): boolean;
    /**
     * @name getHermesDir
     * @description Returns the Hermes installation directory.
     */
    getHermesDir(): string;
    /**
     * @name searchSessions
     * @description Searches Hermes session history for relevant past conversations.
     *
     * This is a lightweight bridge — it reads the Hermes session database using
     * the same better-sqlite3 driver (opening a read-only connection). The query
     * uses FTS5 if the Hermes DB has it, otherwise falls back to LIKE search.
     *
     * @param query - Search query (natural language).
     * @param limit - Max results. Default 5.
     * @returns Array of session snippets with timestamps.
     */
    searchSessions(query: string, limit?: number): Array<{
        sessionId: string;
        title: string;
        snippet: string;
        timestamp: string;
    }>;
    /**
     * @name getRecentSessions
     * @description Returns recent Hermes sessions for context injection.
     * @param limit - Max sessions. Default 3.
     */
    getRecentSessions(limit?: number): Array<{
        sessionId: string;
        title: string;
        timestamp: string;
    }>;
    private getReadableDbPath;
    private hasModernStateSchema;
    private searchModernStateDb;
    private searchLegacySessionsDb;
    private hasTable;
    private toFtsPhrase;
    private formatTimestamp;
}
/**
 * @name hermesBridge
 * @description Singleton instance of the Hermes bridge.
 */
export declare const hermesBridge: HermesBridge;
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