Practice · Praxis

Multiple choice Easy react-loopstop-sequencef1 ~50s

In react_agent.py, every model call is made with stop=["\nObservation:"]. What is that stop sequence for?

A It ends the model's turn before it writes its own Observation, so the runtime supplies the real one B It hides tool results from the model so that they cannot bias the reasoning it writes in its next Thought C It caps each turn at a fixed number of tokens so a long Thought cannot run up the cost D It ends the whole agent loop as soon as the model has produced its final answer

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