Hey, thanks for the report. I see the screenshot with the error “Create plan failed to create/update plan file” and this is a known issue in recent 2,3.x builds.
Could you please share:
- Developer Console logs: Help → Toggle Developer Tools → Console, reproduce the issue, then send a screenshot or paste the console output
- Try switching to a different model (for example, GPT 5.2 Codex instead of Composer 1). This helped some users
Temporary workaround: until the bug is fixed, you can use the plan directly in the chat instead of creating an .md file. The functionality is the same, just without a separate file.
A similar issue was discussed here and was fixed in earlier versions: Plan mode seems to fail on final step of creating a plan. This might be a regression in 2.3.35.
Send the console logs and I’ll pass them to the team as a priority.