bug: grey boxes show up when clicking on terminal in Cursor

[aidandaly24]

Description

A grey box appears when clicking randomly on the terminal UI in Cursor.

Steps to Reproduce

1. Run agentcore
2. Click around

Expected Behavior

No grey box should appear.

Actual Behavior

Grey box appears

CLI Version

No response

Operating System

macOS

Additional Context

No response

[aidandaly24]

Thanks for reporting. We looked into this — the grey "Add to Chat" overlay is triggered by Cursor IDE when it detects mouse clicks in a terminal app that doesn't enable mouse tracking. Apps like nvim don't have this issue because they enable mouse tracking, but that would break text selection/copy-paste in our TUI which is a worse trade-off.

This is a Cursor IDE behavior we can't cleanly work around without degrading the experience.