Section 2

Agent Frameworks

Agent Frameworks builds one τ-bench return, Chen Silva's refund of the dearer of her two tablets, in LangChain, LangGraph, CrewAI and AutoGen on the versions current in September 2026, and records what each does when a run pauses for the customer, resumes in another process, retries or crashes. It closes by setting those four beside Microsoft Agent Framework, AG2 and the OpenAI and Claude agent SDKs, and choosing by where human approval is enforced.