b00b8238f4
When an invalid or unregistered agent is passed to background_task or call_omo_agent, OpenCode crashes with "TypeError: undefined is not an object (evaluating 'agent.name')". This fix: - Validates agent parameter is not empty before launching - Catches prompt errors and returns friendly error message - Notifies parent session when background task fails - Improves error message to guide user on resolution Fixes #37 🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)