Summary
Pi v0.71.1 introduced a websocket-cached transport for OpenAI Codex sessions authenticated through ChatGPT subscriptions. The change keeps persistent WebSocket sessions alive and sends only new conversation items after the first request.
What changed
Pi added a websocket-cached transport path for Codex sessions to reduce full-history replay on multi-turn runs.
Why it matters
This directly targets agent session latency and token overhead, two of the biggest friction points in long-running coding workflows. It also shows how third-party clients are building specialized transport optimizations on top of Codex usage patterns.
Evidence excerpt
Agents Radar said the new transport keeps Codex WebSocket sessions persistent and sends only new conversation items after the first request instead of replaying full history.