export declare const chatAgent: import("langchain").ReactAgent<import("langchain").AgentTypeConfig<import("langchain").ResponseFormatUndefined, undefined, import("langchain").AnyAnnotationRoot, readonly [import("langchain").AgentMiddleware<undefined, undefined, unknown, readonly (import("@langchain/core/tools").ClientTool | import("@langchain/core/tools").ServerTool)[], readonly []>], readonly [import("langchain").DynamicStructuredTool<import("zod").ZodObject<{
    query: import("zod").ZodString;
}, import("zod/v4/core").$strip>, {
    query: string;
}, {
    query: string;
}, string, unknown, "search_knowledge_base">, ...(import("@langchain/core/tools").ClientTool | import("@langchain/core/tools").ServerTool)[]], readonly []>>;