Claude Sonnet 3.7 Agent consistently fails to generate files or complete requested actions

Bug Reports
1

Description:
The Claude Sonnet 3.7 agent (Base + Thinking) within Cursor has consistently failed to generate any files or execute intended actions across multiple prompts and use cases. This issue is not restricted to any specific technology stack or file type; it broadly impacts functionality, entirely hindering productive use. Despite clear, precise instructions provided, the agent remains stuck in brainstorming or preliminary phases without progressing to actual task execution or file generation.

This critical issue has persisted over multiple days and multiple attempts. I have communicated via email and Twitter for urgent assistance. Unfortunately, there’s been a complete lack of meaningful response from Cursor support, which compounds frustration. This unresponsiveness and breakdown in core product functionality is severely impacting trust and productivity and is, in my view, extremely unprofessional.

Steps to Reproduce:

  1. Open Cursor set to Claude Sonnet 3.7 (Base + Thinking).
  2. Provide an explicit, actionable prompt requiring generation of files or content (e.g., HTML/CSS, JavaScript, or general tasks).
  3. Observe that the agent remains in initial brainstorming and fails to produce any functional output or files.

Expected Result:
Claude Sonnet 3.7 efficiently generates requested files and completes instructed actions, matching task requirements.

Actual Result:
Claude Sonnet 3.7 does not generate files or fulfill any core requested actions, rendering the agent unusable.

Severity: High – Complete blockage of core functionality, directly impacts business operations and productivity.

Additional Notes:

  • I have reached out via email and Twitter; lack of meaningful support response is notably unprofessional.
  • Immediate assistance, resolution, and improved communication are urgently required.
2

i am also facing the same issue Cursor Team please look into this. Its impacting the development.

3

Same here for the last few hours. Falling back to Claude Code works every time

4

@falconx @bold.eggle Don’t expect an early resolution from cursor; I’ve found a workaround. Uninstall and reinstall to reduce failures, though not completely. Switch to another IDE if urgent.

5

I see the same with both sonnet 3.7 base and thinking ones.
I even tried to implicitly instruct it to apply changes using tools “edit_file”,“reapply” but this didn’t work.

@danperks, for Cursor team I would suggest to have e2e tests with all out-of-the-box models to check if they are doing those basic/essential things correctly, and outline those restrictions found in the model chooser dropdown or at least on the Models page in settings.

Otherwise all Cursor users are basically doing experimentation (each one separately, repeating same experiments) instead of creating value.

6

i see bug on linux 0.46.14

7

Claude 3.7 it’s not same like we use on 24/02/2025 to 27/02/2025 as a slow pool users

8

It may sound weird, but I rebooted my Mac (for a different reason) and after some other work asked 3.7 thinking to generate Story doc, acknowledging that I may need to copy-paste it manually.
And it actually modified the file by itself, then proceeded with Story implementation, and finished it in one shot while I stared at this magic happening.

It may be that Cursor team rolled something out on backend, but…

Reboot your machine. And try again.

Cursor v0.46.7

9

No response from the cursor team? I’m having the same issue

10

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