/**
 * A conduit provider resolves session+project info for non-file-based conduits
 * (e.g., TUI in-memory conduit state). Returns null for unrecognized conduitIds
 * so the file-based lookup is used as fallback.
 */
export type ConduitProvider = (conduitId: string, backend: string) => {
    sessionId: string;
    projectId: string;
} | null;
/**
 * Register a conduit provider callback. Called by adapters (e.g., TuiGatewayAdapter)
 * during start() so session lookup can resolve in-memory conduit state.
 */
export declare function registerConduitProvider(provider: ConduitProvider): void;
/** Shape of sessions.json: `{"backend:channel": sessionId, "legacyChannel": sessionId, ...}` */
export type SessionsData = Record<string, string>;
declare class SessionRepo {
    private _repo;
    getSessionAsync(channel: string, backend: string): Promise<string | undefined>;
    setSessionAsync(channel: string, sessionId: string, backend: string): Promise<void>;
    deleteSessionAsync(channel: string, backend: string): Promise<void>;
    /** Drop the in-memory cache so the next read() fetches from disk. Test hook. */
    invalidate(): void;
    /** Wait for any in-flight mutate() to complete. For graceful SIGTERM drain. */
    flush(): Promise<void>;
}
export declare const sessionRepo: SessionRepo;
export {};