vivo Internet Technology

Jul 22, 2026 · Artificial Intelligence

From ReAct to Agent Harness: Engineering Interactive, Recoverable, and Controllable AI Agents

The article analyzes how Agent engineering evolves from a simple ReAct loop to a full‑featured Agent Harness, detailing the need for shared state schemas, runtime‑generated facts, and clear UI‑runtime boundaries to make model behavior interactive, recoverable, controllable, and traceable.