Unable to create files

[redseachange]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I have a weird issue that has popped up before and I’m experiencing it now. It doesn’t happen all the time.

I’m currently running a tanstack start app in a monorepo, so not sure if the routeTree generation is causing this issue, but I don’t experience this issue using Zed.

Whenever I create a file, it panics and immediately cancels the file creation in Cursor.

Steps to Reproduce

See above

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.3.35 (Universal)
VSCode Version: 1.105.1
Commit: cf8353edc265f5e46b798bfb276861d0bf3bf120
Date: 2026-01-13T07:39:18.564Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, interesting bug. I’ll need a bit more detail to figure it out:

1. How exactly are you creating the file? Via File Explorer (right click > New File), via CMD+N, or is the Agent trying to create it?

2. What exactly happens? Does the file appear and then disappear right away? Or does the create dialog just close?

3. Can you reproduce it if you stop the dev server so routeTree generation doesn’t run?

4. Can you open Developer Tools (CMD+Shift+I > Console tab) and try creating a file. Do you see any errors there?

Given that it works fine in Zed, it sounds like a conflict between Cursor and something in your setup. I want to understand if it’s related to the file watcher or routeTree generation.