import type { Session, SessionCacheConfig } from '../types/index.js';
import type { SessionStore } from '../session/SessionStore.js';
/**
 * LRU session cache wrapping a SessionStore.
 * Reduces repeated store lookups for same-process reads (~10-90ms per warm turn).
 */
export declare class SessionCache {
    private cache;
    private maxEntries;
    private ttlMs;
    constructor(config?: SessionCacheConfig);
    getOrLoad(id: string, store: SessionStore): Promise<Session | null>;
    put(session: Session): void;
    invalidate(id: string): void;
}