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agent about in your terminalIDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......
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CLI Version 2026.01.17-d239e66
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Hey, thanks for the report and screenshots. There are two separate things here, so I’ll cover them one by one.
Claude Code and Codex tabs. This isn’t a bug. Starting in 3.15, the agent panel is reserved for Cursor agents, so third-party extension tabs no longer show up there. The extensions still work, they just open differently:
Ctrl+Shift+P: Claude Code: Open in New Tab, Codex: Open Codex Sidebar, or New Codex AgentIf this layout is inconvenient, I can share it with the team as feedback.
The empty column next to the chat, the one in the red box. This is a known Windows issue. It happens when you open Claude Code using the button in the tab bar. For now the workaround is to close that panel via Close Pane Ctrl+F4, then open the extension from the sidebar. That way the extra column won’t appear. We’re tracking this and I’ll reply here if there’s an update.
Let me know if any of this doesn’t work.
note that you cannot drag it to activity bar if it is horizontal, you need to put it in vertical view first
Thanks for the update. Actually it’s not a major issue since I only sometimes use Claude and Codex agents inside the Cursor chat panel. The method you shard is already good. But still it’s convenient to be able to open claude or codex inside the chat panel.
And I still wonder why Cursor team decided to remove them from the chat penel
This is a major regression to my workflow. I switched to cursor primarily because of a better UI/UX experience and Tab completions. But I feel reserving the secondary panel just for Cursor Agents is sort of “forced” and breaks coherent workflows for a lot of developers like me. It’s really uncomfortable to chat from both the left sidebar, compromise the file explorer view; and also chat with cursor agents on the right sidebar. I’ll have to move back to VS Code.
Hey, thanks for the feedback, and I get that changing a familiar workflow can hurt productivity.
Just to be clear, starting in 3.15 the secondary sidebar on the right is reserved for Cursor agents, so tabs from third-party extensions like Claude Code and Codex no longer show up there. This is an intentional change, not a bug. The extensions still work, they just open differently:
Ctrl+Shift+P: Claude Code: Open in New Tab, Codex: Open Codex Sidebar, New Codex AgentI’ll pass your main point to the team as feedback, that the right panel being only for Cursor agents breaks a combined workflow. The layout decision is product-driven, so I can’t promise the tabs will come back, but this kind of signal matters and I’ll share it.
If any of the workarounds don’t work for you, tell me and we’ll dig in.
Hey, thanks for the report. There are two separate things here.
Codex not opening even from the Command Palette Codex: Open Codex Sidebar or New Codex Agent is not the same as the tabs being removed. This is a separate issue with the extension not opening on 3.15.6, and we’re tracking it. A few things to try right now:
Ctrl+Shift+P then Developer: Reload Windowopenai.chatgpt and reload againIf none of that helps, tell me your Codex extension version.
About rolling back: yep, you can install an older version of Cursor and turn off auto-update in settings so it won’t update back. Tell me which OS you’re on Windows, macOS, or Linux, and I’ll point you to the right installer.
Separately about the Claude Code and Codex tabs in the right panel: starting in 3.15 the secondary sidebar is reserved for Cursor agents, so tabs from third-party extensions no longer show there. That’s an intended change, not a bug. I’ll share your point that this breaks a combined workflow with the team as feedback.
Let me know how it goes.
빠르게 답변 주셔서 감사합니다. cursor --version 을 통해 확인한 커서 버전 정보를 이미지로 남깁니다.
정확한 버전이 기억 나지는 않지만, 2개 업데이트 전 시점까지는 codex가 정상 작동했던 것 같습니다.
사용하는 운영체제는 Windows 이고, 이전 버전 cursor 재설치를 안내해주시면 도움이 될 것 같습니다.
Developer: Reload Window 후에도 메인 화면에서 codex가 열리지 않는 현상은 동일합니다.
참고로 codex 버전은 26.721.30844 입니다.
