Come on, man. Failed to edit

[kbd]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Latest update once again somehow breaks models ability to edit files due to not finding strings or failed tool calls. Can you guys stop re-breaking things you’ve fixed? It causes me to lose tokens and pay more money, starting to believe this is done on purpose to boost revenue. Next time there is a working version I’m just never upgrading again, completely untrustworthy when something breaks or rebreaks every single update.

Steps to Reproduce

Just use the program exactly as intended and it will break constantly and waste your tokens

Expected Behavior

That it works

Screenshots / Screen Recordings

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.2.36 (user setup)
VSCode Version: 1.105.1
Commit: 55c9bc11e99cedd1fb93fbb7996abf779c583150
Date: 2025-12-18T06:25:21.733Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.19045

For AI issues: which model did you use?

Opus 4.5

Does this stop you from using Cursor

Yes - Cursor is unusable

[deanrie]

Hey, thanks for the report. I see the agent successfully does grep and reads the style.css file, but then can’t find the line to replace - this looks like a regression in the edit tool.

For investigation, we need:

1. Request ID - open the chat menu (three dots top right) > Copy Request ID for this failed request. This is critical for engineers.
2. Reproduction steps - which exact file and what task did you give the AI?
3. Console logs - press Ctrl+Shift+P > Developer: Toggle Developer Tools, check for errors in Console during the failed edit.

Meanwhile, try:

• Switching to another model (GPT-5 or Sonnet 4.5) to see if the issue is specific to Opus 4.5.