Build First AI Agent Funnel

5-tier premium funnel — €0 Primer to €2,997 Founder Circle.

Test-branch funnel: Primer → Pack → Toolkit → Mastery → Architect → Founder's Circle. Lemon Squeezy + Claude Managed Agents customer service. Routes /start-here, /build, /build/[slug], /founders-circle. Lives on funnel/build-first-ai-agent-v1 branch.