Three sub-agents audit one product page

Part 4 of a 5-part series on building agents from scratch in Claude Code, featuring a real brand example. We audit the ProGRO Density+ product page using three specialized sub-agents: page speed, SEO health, and messaging alignment (compared against all prior session data). An orchestrator synthesizes the findings. Output: full audit report & prioritized quick wins. Tech introduced: agent orchestration. To follow along, use the repo at https://github.com/juliegrumman/soapbox-progro-starter