[Multi-Tab] No prompt when modifying the same file

[HomyeeKing]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I use multi-tab to delegate two tasks and will modify the same file, but no conflict prompt

Steps to Reproduce

Tab One: @README.md insert 1111
Tab Two: @README.md insert 222

Expected Behavior

prompt there’s a conflict since it’s not allowed for editing the same file

Screenshots / Screen Recordings

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.54
VSCode Version: 1.99.3
Commit: 5c17eb2968a37f66bc6662f48d6356a100b67be0
Date: 2025-10-21T19:07:38.476Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 25.0.0

Does this stop you from using Cursor

No - Cursor works, but with this issue

[deanrie]

Hey, thanks for the report. You’re right, Cursor should show a warning when multiple tabs try to edit the same file at the same time, as stated in the Tabs documentation.

I’ll pass this to the team to investigate. Let me know if you notice any patterns around when the conflict warning does or doesn’t appear.

[HomyeeKing]

I’ve tested edit same file case several times, most of time it will apply the change sequentially, how you judge if it need to be warned, i.e.:

Assume there’re two tabs running at the same time;

then Tab1 modify a.ts at 5s, finished at 10s;

Tab2 modify a.ts at 11s then finished at 13s

Does this count as simultaneous editing? Although their running times overlap