Base callback handler for LangChain.
Represents a request to execute an action by an agent.
The action consists of the name of the tool to execute and the input to pass to the tool. The log is used to pass along extra information about the action.
Final return value of an ActionAgent.
Agents return an AgentFinish when they have reached a stopping condition.
Class for storing a piece of text and associated metadata.
Document is for retrieval workflows, not chat I/O. For sending text
to an LLM in a conversation, use message types from langchain.messages.
Base abstract message class.
Messages are the inputs and outputs of a chat model.
Examples include HumanMessage,
AIMessage, and
SystemMessage.
ChatGeneration chunk.
ChatGeneration chunks can be concatenated with other ChatGeneration chunks.
GenerationChunk, which can be concatenated with other Generation chunks.
A container for results of an LLM call.
Both chat models and LLMs generate an LLMResult object. This object contains the
generated outputs and any additional information that the model provider wants to
return.
Mixin for Retriever callbacks.
Mixin for LLM callbacks.
Mixin for chain callbacks.
Mixin for tool callbacks.
Mixin for callback manager.
Mixin for run manager.
Base callback handler.
Base async callback handler.
Base callback manager.
