Architect

Aug 23, 2026 · Artificial Intelligence

How Pi’s Rewritten Harness Verifies Long‑Running Agent Actions After 50 Hours

The article analyses Pi’s Harness v2 redesign, explaining how persistent transaction‑style recording, tool‑result pruning with spill, replay policies, and separated storage of conversation, runtime state, and usage enable an agent to survive process crashes and still prove which steps were completed.