- Add mandatory parallel tool calls section - Add mandatory 7-section subagent prompt structure guide - Inject BUILD_AGENT_PROMPT_EXTENSION to all non-subagent agents (not just 'build') - Fixes issue where custom primary agents don't receive orchestration guidance 🤖 GENERATED WITH ASSISTANCE OF [OhMyOpenCode](https://github.com/code-yeongyu/oh-my-opencode)