Week 3 is "sub-agents" — what specifically do I build?

Three sub-agents. code-reviewer: primed as an Adobe EQP reviewer, runs phpcs --standard=Magento2, phpstan --level=6, checks for ObjectManager + vendor edits + missing _isAllowed(). test-writer: knows your MFTF action-group conventions, writes one MFTF test per feature, runs it before reporting back. release-notes: parses conventional commits, groups by type, surfaces breaking changes. Each agent is a Markdown file in .claude/agents/<name>.md — system prompt + tools allowed + when to invoke. Test by deliberately writing bad code (ObjectManager::getInstance() in a controller) and watching the reviewer catch it.