claude-code - 💡(How to fix) Fix [Bug] TUI not repainting after external editor ($EDITOR) exit without SIGWINCH [1 comments, 2 participants]

TL;DR

Implement a render-on-child-exit callback in the TUI render loop to automatically repaint the interface when the spawned $EDITOR process exits.

Guidance

• Investigate the TUI render loop to identify where a callback can be added to trigger a repaint when the $EDITOR process exits.
• Verify that the SIGWINCH signal is being handled correctly, as it currently forces a full repaint, and use this as a reference for the desired behavior.
• Consider adding a debug log or print statement to confirm when the $EDITOR process exits and when the TUI render loop is triggered.
• Review the Claude Code documentation and source code to see if there are any existing hooks or callbacks that can be utilized for this purpose.

Example

No code example is provided as the issue does not contain sufficient information about the codebase or the specific rendering library being used.

Notes

The provided information suggests that the issue is not specific to tmux or the terminal multiplexer, but rather a missing callback in the TUI render loop. The fact that resizing the terminal window or changing font size triggers a repaint suggests that the rendering code is capable of handling external events, but needs to be modified to handle the $EDITOR process exit event.

Recommendation

Apply a workaround by adding a render-on-child-exit callback to the TUI render loop, as this is the most direct way to address the issue and ensure the TUI repaints automatically when the $EDITOR process exits.