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This page describes agent behavior in May 2026. The current agent can open a thread when it proposes an edit, and critique passes can create reviewer comments.

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New features

  • Agent can read images. The agent’s Read tool began accepting image files such as PNG and JPEG files, so you could point it to a screenshot or figure on disk instead of pasting the image into chat. See Send and steer requests.
  • System prompt in the session transcript. The session viewer’s System card now shows the full system prompt the agent ran with, so you can see the context and writing rules used for the request. See Activity and transcript.

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Updates

  • Rules are inlined in the system prompt. Your writing rules are now included in the agent’s system prompt under “Rules to obey” instead of being appended to each user turn. The agent has the full rule list on every request, and the rules show up in the transcript. See Writing rules.
  • Agents replied to existing threads. At the time of this release, the agent could reply only to comment threads that you opened. It could not start a new thread without a user request. See Comments and critique.

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Bug fixes

  • Creating a new file no longer carries over state from the previously active tab. New files now open empty as expected.