Release notes
Parallel agents stay on one card
Several agents started together now stay in a single card. A worker that joins after the first no longer paints a second copy of the same group. Direct GPT-5.6 agent runs also mark the stable part of the conversation so the provider can reuse it.
Fixed
- Parallel sub-agents launched in one step share one host card, tied to the spawn that started the group.
- The new browser tab no longer paints large blurred glows.
New
- Agent runs on direct OpenAI GPT-5.6 and later mark stable conversation blocks for prompt caching, and send the previous request shape if the provider rejects that.