Sub-agents spawned by background agents appear in UI without user notification #2493
Description
Describe the bug
When a background general-purpose agent spawns a child agent,
the child appears in the /tasks panel silently — no chat message,
no explanation of why it was started or what it does.
Affected version
No response
Steps to reproduce the behavior
- Launch a general-purpose agent in background mode with a complex task
- The agent internally spawns a sub-agent (e.g. to split work)
- The sub-agent appears in /tasks panel with a different name/description
- User has no idea who started it or why
Actual behavior
Silent appearance in /tasks. User can only discover it via /tasks panel.
Expected behavior
Any agent launched (directly or by another agent) should post a notification in the chat explaining what it is and who started it.
Additional context
The parent agent also hung for 18+ minutes (7 tool_calls) with no
timeout or warning, then its child continued working after the parent
was killed.