langchain<2.0,>=1.3
langchain-openai<2.0,>=1.1
langgraph<2.0,>=1.2
langgraph-checkpoint-sqlite<4.0,>=3.0
langmem<1.0,>=0.0.29
prompt_toolkit<4.0.0,>=3.0.52
rich<16.0.0,>=15.0.0
