/**
 * Memory Bridge — session lifecycle rows (start, end, latest) in the
 * `sessions` namespace. Split out of memory-bridge.ts, which re-exports the
 * public symbols.
 */
export declare function bridgeSessionStart(options: {
    sessionId: string;
    agentId?: string;
    metadata?: Record<string, unknown>;
    dbPath?: string;
}): Promise<{
    success: boolean;
    id: string;
    error?: string;
} | null>;
export declare function bridgeSessionEnd(options: {
    sessionId: string;
    summary?: string;
    metrics?: Record<string, unknown>;
    dbPath?: string;
}): Promise<{
    success: boolean;
    error?: string;
} | null>;
/** The most recently started session recorded by bridgeSessionStart, read
 *  back from its row — or null when there is none (or no backend). */
export declare function bridgeLatestSession(options: {
    excludeSessionId?: string;
    dbPath?: string;
}): Promise<{
    sessionId: string;
    status: string;
    startedAt: string;
    endedAt?: string;
    summary?: string;
    metrics?: Record<string, unknown>;
} | null>;
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