langchain-knowledge-patch
LangChain 1.0 Knowledge Patch
Claude's baseline knowledge covers LangChain 0.2.x and LangGraph 0.1.x. This skill provides changes from the LangChain 1.0 / LangGraph 1.0 release (2025-10-22).
Quick Reference
Agent Creation
| Old API | New API | Notes |
|---|---|---|
langgraph.prebuilt.create_react_agent |
langchain.agents.create_agent |
Full replacement |
prompt= |
system_prompt= |
Parameter renamed |
config["configurable"] |
context=Context(...) |
Typed runtime context |
| Pydantic/dataclass state | TypedDict only |
state_schema constraint |
Streaming node "agent" |
"model" |
Node name changed |
model.bind_tools(...) then pass |
Pass unbound model + tools= |
Pre-bound models rejected |
create_agent — Essential Pattern
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