claude-code - 💡(How to fix) Fix [BUG] <Box> can't be nested inside <Text> crash when permission dialog renders in tmux split-pane spawned agent [5 comments, 6 participants]

When a sub-agent is spawned via CLAUDE_CODE_SPAWN_BACKEND=tmux with teammateMode: splitPane and permissions are set to ask, the agent crashes immediately with an Ink rendering error when it tries to show the permission prompt dialog.

Error Messages/Logs

ERROR <Box> can't be nested inside <Text> component Changing "ask" to "allow" in permissions prevents the crash — the permission dialog is never rendered so the Ink error is not triggered.

TL;DR

The issue can be worked around by changing the permission setting from "ask" to "allow", preventing the crash caused by the Ink rendering error.

Guidance

• Verify that the issue is specific to the tmux backend and splitPane teammate mode by testing with different settings.
• Check the Ink component documentation to ensure that <Box> is not being incorrectly nested inside a <Text> component.
• Test the permission prompt dialog with different permission settings to see if the issue is specific to certain permissions.
• Consider downgrading to a previous version of Claude Code, if the last working version can be determined, to temporarily resolve the issue.

Example

No code snippet is provided as the issue is related to a specific error in the Ink rendering and the code is not explicitly mentioned.

Notes

The issue seems to be a regression, and the last working version is not specified. The workaround provided may not be a permanent solution, and further investigation into the Ink rendering error is needed.

Recommendation

Apply workaround: changing the permission setting from "ask" to "allow" prevents the crash, but this may not be a desirable long-term solution, as it bypasses the permission prompt dialog.