ReAct (Reason+Act)

An agent pattern that interleaves reasoning traces with tool/environment actions so each action is chosen from an explicit rationale and each observation updates the next thought.

grounded in: doctrine principles.md's recursive harness loop 'reflect on real signals -> propose ONE grounded change -> gate -> ship -> VERIFY its CI' is a reason-then-act cycle; ReAct is the established interleav

Connected concepts

Agent = Model + Harness, Tool use / function calling, Planning & reflection, Recursive harness loop, Reflexion, Chain-of-Thought, Agentic design patterns