export interface DeferredTopicBinding {
    sessionId: string;
    turnId: string;
    chatId: string;
    larkAppId: string;
    routingAnchor: string;
    rootMessageId: string;
    createdAt: string;
}
export declare function deferredTopicBindingPath(dataDir: string, sessionId: string): string;
export declare function readDeferredTopicBinding(dataDir: string, sessionId: string): DeferredTopicBinding | undefined;
export declare function writeDeferredTopicBinding(dataDir: string, binding: DeferredTopicBinding): void;
/** Serialize the first-message claim across concurrent `botmux send`
 * processes. The callback may hold the lock across the Lark request: that is
 * intentional, because releasing it before the provider returns would allow
 * two callers to create two roots for the same deferred run. */
export declare function withDeferredTopicBindingLock<T>(dataDir: string, sessionId: string, fn: () => Promise<T>): Promise<T>;
export declare function removeDeferredTopicBinding(dataDir: string, sessionId: string): void;
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