claude-code - 💡(How to fix) Fix [BUG] Teammate CLI crashes when receiving permission_response [1 participants]

Environment: Claude Code version: 2.1.117 Platform: macOS (Darwin 25.4.0) Shell: zsh Teammate backend: tmux Teammate model: sonnet Teammate agentType: custom (.claude/agents/backend-dev.md, .claude/agents/frontend-dev.md)

Stack trace captured from the teammate's tmux pane (identical across both crashes):

• createInstance (/$bunfs/root/src/entrypoints/cli.js:495:249)
• BU (/$bunfs/root/src/entrypoints/cli.js:477:57938)
• gTH (/$bunfs/root/src/entrypoints/cli.js:477:87786)
• XWH (/$bunfs/root/src/entrypoints/cli.js:477:86997)
• bgH (/$bunfs/root/src/entrypoints/cli.js:477:85896)
• Ir (/$bunfs/root/src/entrypoints/cli.js:477:85717)
• MWH (/$bunfs/root/src/entrypoints/cli.js:477:82456)
• T_ (/$bunfs/root/src/entrypoints/cli.js:477:6497)
• hH (/$bunfs/root/src/entrypoints/cli.js:477:4980)
• eH (/$bunfs/root/src/entrypoints/cli.js:477:5281)

Message flow (observed in ~/.claude/teams/{team}/inboxes/):

1. teammate → team-lead: permission_request { tool_name: "Bash", input: { command: "git push && git log --oneline -4" } }

2. team-lead → teammate: permission_response { type: "permission_response", subtype: "success", response: { updated_input: { command: "git push && git log --oneline -4" } } }

3. (no further messages from teammate — pane shows the stack trace above)

Minimal reproduction steps:

1. Start a Claude Code session as the team lead (claude)
2. Call TeamCreate to create a team, then Agent to spawn a teammate with tmux backend
3. Assign the teammate any task that culminates in a git push (or any Bash command that triggers a permission_request)
4. Approve the permission request from the team lead
5. Observe the teammate's tmux pane — the stack trace above appears and the teammate stops responding

TL;DR

The teammate process crashes immediately after receiving a permission_response from the team lead, likely due to an issue with the createInstance function in cli.js.

Guidance

• Review the createInstance function in cli.js (line 495) to identify potential issues with handling permission responses.
• Verify that the permission_response message is correctly formatted and contains the expected data, such as approve: true and the updated input command.
• Check the teammate's inbox for any errors or unexpected messages that may be causing the crash.
• Consider adding error handling to the teammate process to catch and log any exceptions that may occur when processing the permission response.

Example

No code example is provided as the issue is likely specific to the createInstance function and requires further investigation.

Notes

The issue is reported to be a regression, and the last working version is not specified. It may be helpful to review the change history of the createInstance function and the surrounding code to identify potential causes of the issue.

Recommendation

Apply a workaround by adding error handling to the teammate process to catch and log any exceptions that may occur when processing the permission response, until the root cause of the issue can be identified and fixed.