import { PromptTemplate } from '@langchain/core/prompts';
import { MemorySaver } from '@langchain/langgraph';
import type { StructuredToolInterface } from '@langchain/core/tools';
import type { BaseChatModel } from '@langchain/core/language_models/chat_models';
import type { RunnableConfig } from '@langchain/core/runnables';
import type { ChatModel } from './state.js';
export declare const MAX_ITERATIONS = 15;
export declare function formatPrompt(template: PromptTemplate, variables: Record<string, string>): Promise<string>;
export declare function isAgentRunnable(x: unknown): x is {
    invoke: (input: unknown, config?: RunnableConfig) => Promise<unknown>;
};
export declare function ensureBaseChatModel(chat: ChatModel): BaseChatModel;
export declare function buildAgent(llm: BaseChatModel, tools: StructuredToolInterface[], saver?: MemorySaver, prompt?: string): Promise<import("@langchain/langgraph").CompiledStateGraph<import("@langchain/langgraph").StateType<{
    messages: import("@langchain/langgraph").BinaryOperatorAggregate<import("@langchain/core/messages").BaseMessage[], import("@langchain/langgraph").Messages>;
}>, import("@langchain/langgraph").UpdateType<{
    messages: import("@langchain/langgraph").BinaryOperatorAggregate<import("@langchain/core/messages").BaseMessage[], import("@langchain/langgraph").Messages>;
}>, any, {
    messages: import("@langchain/langgraph").BinaryOperatorAggregate<import("@langchain/core/messages").BaseMessage[], import("@langchain/langgraph").Messages>;
}, {
    messages: import("@langchain/langgraph").BinaryOperatorAggregate<import("@langchain/core/messages").BaseMessage[], import("@langchain/langgraph").Messages>;
    structuredResponse: {
        (): import("@langchain/langgraph").LastValue<Record<string, any>>;
        (annotation: import("@langchain/langgraph").SingleReducer<Record<string, any>, Record<string, any>>): import("@langchain/langgraph").BinaryOperatorAggregate<Record<string, any>, Record<string, any>>;
        Root: <S extends import("@langchain/langgraph").StateDefinition>(sd: S) => import("@langchain/langgraph").AnnotationRoot<S>;
    };
} & {
    messages: import("@langchain/langgraph").BinaryOperatorAggregate<import("@langchain/core/messages").BaseMessage[], import("@langchain/langgraph").Messages>;
}, import("@langchain/langgraph").StateDefinition>>;
export declare function invokeAgent(agent: unknown, userInput: string, config: RunnableConfig): Promise<string>;
export declare function extractFeedback(output: string): string;
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