Hey, thanks for the report. Good news, the Save to Workspace feature is still there, only the default changed. Plans now save to ~/.cursor/plans by default in your home folder. This was an intentional change back in December 2025, so if you updated from an older build, it might look like the feature was removed.
If you want to keep a plan inside your project, open it and click Save to Workspace. It’s the inline button on the plan card in chat, or in the menu (⋯ / CTA) in the plan editor. The plan will be moved to <workspace>/.cursor/plans/.
There isn’t a setting to change the default path to the workspace yet. The request is tracked here, feel free to vote or subscribe for updates: Option to save Plans in project-level .cursor directory
Let me know if Save to Workspace isn’t showing up for you, then we can dig deeper.