index.ts

import type { OpenAIClient } from "@langchain/openai";
import {
  BaseMessage,
  HumanMessage,
  AIMessage,
  SystemMessage,
} from "@langchain/core/messages";

/* #__PURE__ */ console.warn(
  [
    `[WARNING]: Importing from "langchain/schema" is deprecated.`,
    ``,
    `Instead, please import from the appropriate entrypoint in "@langchain/core" or "langchain".`,
    ``,
    `This will be mandatory after the next "langchain" minor version bump to 0.2.`,
  ].join("\n")
);

export {
  type AgentAction,
  type AgentFinish,
  type AgentStep,
} from "@langchain/core/agents";

export { RUN_KEY } from "@langchain/core/outputs";

export { type Example } from "@langchain/core/prompts";

// TODO: Deprecate when SDK typing is updated
export type OpenAIToolCall = OpenAIClient.ChatCompletionMessageToolCall & {
  index: number;
};

export {
  type StoredMessageData,
  type StoredMessage,
  type StoredGeneration,
  type MessageType,
  type MessageContent,
  type BaseMessageFields,
  type ChatMessageFieldsWithRole,
  type FunctionMessageFieldsWithName,
  type ToolMessageFieldsWithToolCallId,
  BaseMessageChunk,
  HumanMessageChunk,
  AIMessageChunk,
  SystemMessageChunk,
  FunctionMessage,
  FunctionMessageChunk,
  ToolMessage,
  ToolMessageChunk,
  ChatMessage,
  type BaseMessageLike,
  mapStoredMessageToChatMessage,
  ChatMessageChunk,
  coerceMessageLikeToMessage,
  isBaseMessage,
  isBaseMessageChunk,
} from "@langchain/core/messages";

export { BaseMessage, HumanMessage, AIMessage, SystemMessage };

/**
 * @deprecated
 * Use {@link BaseMessage} instead.
 */
export const BaseChatMessage = BaseMessage;

/**
 * @deprecated
 * Use {@link HumanMessage} instead.
 */
export const HumanChatMessage = HumanMessage;

/**
 * @deprecated
 * Use {@link AIMessage} instead.
 */
export const AIChatMessage = AIMessage;

/**
 * @deprecated
 * Use {@link SystemMessage} instead.
 */
export const SystemChatMessage = SystemMessage;

export {
  type Generation,
  type GenerationChunkFields,
  GenerationChunk,
  type ChatResult,
  type ChatGeneration,
  ChatGenerationChunk,
  type LLMResult,
} from "@langchain/core/outputs";

export { BasePromptValue } from "@langchain/core/prompt_values";

export {
  type InputValues,
  type PartialValues,
  type ChainValues,
} from "@langchain/core/utils/types";

export {
  BaseChatMessageHistory,
  BaseListChatMessageHistory,
} from "@langchain/core/chat_history";

export { BaseCache } from "@langchain/core/caches";

export { Docstore } from "@langchain/community/stores/doc/base";