L6 · The blind host model
The provider-blindness invariant, serve_blind (framing-only decode), the root-pinned immutable response cache, the *.on.dig.net + custom-domain resolver, the /v1 control plane (CHIP-0002 login, JWT sessions, refresh reuse-detection, action re-auth, GitHub-OIDC CI), and the accept-on-signature push trust model.