Edit tool issues in Cursor CLI

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor CLI

Describe the Bug

Both haiku 4.5 and sonnet 4.5 cannot reliably use the edit tool in Cursor anymore. They switch to using python scripts for editing.

Steps to Reproduce

Start editing files with the AI. The AI fails more and more edits, until it switches to creating a python script to edit with.

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.7.52
VSCode Version: 1.99.3
Commit: 9675251a06b1314d50ff34b0cbe5109b78f848c0
Date: 2025-10-17T01:41:03.967Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Linux x64 6.8.0-85-generic

For AI issues: which model did you use?

Haiku 4.5, Sonnet 4.5

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hey, thanks for the report. The editing tool has had some reliability issues lately, the team is investigating similar failures with file editing tools.

To help investigate your specific issue in the CLI, could you share:

  • An example of the Python script the AI generates when it switches to this workaround
  • Any error messages you see when the editing tool fails
  • The Request ID /copy-request-id
  • Does this happen in the IDE as well, or only when using the CLI?
3

I can confirm that Haiku 4.5 randomly decided that it cannot make any edits in any of my projects. When switching to Sonnet 4.5, it can make the edits with no problems.