Ethos onboarding
How a user with no Ethos lands a pre-seeded Builder — the availability CTA, the intent=onboarding scope handshake, the curated seed list, and the Builder handoff.
Auto-Generate bypass
What the seeded Builder does on landing — the auto-Analyze → auto-Propose chain, the per-call intent="onboarding" flag, the bypass boundary, and how the window closes when the Ethos is saved.