LangChain Deploy Integration (Python) Overview An engineer ships a working LangGraph agent to Vercel. Every non-trivial request returns . The Python runtime on Vercel defaults to a 10-second cap (P35) — a three-tool agent with one RAG round easily runs 20-40s. Local dev never exposed the wall because on a laptop has no timeout. Two fixes apply together and each is load-bearing: The raises the Vercel-imposed wall; streaming reduces time-to-first-byte to under a second so the user sees progress even on a 40-second completion. Once the Vercel cap is fixed, the next three walls are: Cloud Run col…