session.get() doesn't return status field - it was always undefined.
Now using session.status() API which returns { type: 'idle' | 'busy' | 'retry' }
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
- Change prompt() to promptAsync() for parent session notification
- Only mark 404 errors as permanent task failure
- Add defensive progress initialization
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
- Add notifyParentSession() to send message to parent session via prompt()
- Agent receives completion notification immediately, not waiting for next chat.message
- Includes task ID, description, duration, tool calls in notification
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
- Replace unreliable event-based tracking with 2-second polling
- Use SDK session.get() to detect completion (status === idle)
- Use SDK session.messages() to count tool_use parts for progress
- Auto-start polling on launch, auto-stop when no running tasks
- Resume polling on restore if running tasks exist
Fixes: Child session events not reaching plugin event handler
🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)
