Crate langgraph 

langgraph is a framework for building stateful, multi-actor applications with LLMs.

This crate is the main entry point (umbrella crate) that re-exports the core engine and optional ecosystem crates like checkpointers, prebuilt agents, tracing, and model providers.

Modules

channels

checkpoint

config

constants

error

graph

managed

Managed values - will be implemented in Phase 4

pregel

prelude

runnable

runtime

stream

types

Macros

conditional_edges

Simplify add_conditional_edges with automatic route map construction.

node_fn

Convenience macro to wrap a sync closure for use with add_node.

routing

Wrap a routing function for use with add_conditional_edges.

Attribute Macros

langgraph_state

This attribute macro:

tool

Attribute macro to define a tool from a function.

Derive Macros

StateGraph

Derive macro for StateGraph state types.

Traceable