ReAct is the pattern behind most tool-using agents. The signal is why interleaving reasoning with actions (and observing results) beats reasoning alone or acting alone. Here is the answer that connects the prompt pattern to real agent behavior.
Updated Aug 2026 · Grounded in real Applied AI Engineer interview loops and written to a senior-engineer editorial bar.
ReAct is the pattern behind most tool-using agents. The signal is why interleaving reasoning with actions (and observing results) beats reasoning alone or acting alone. Here is the answer that connects the prompt pattern to real agent behavior.
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