The root +layout.svelte redirects anonymous traffic to /login, so a
fresh CI browser context never gets to render the lobby's
DEV-gated synthetic-report section — the previous spec relied on
leftover session state in the local browser and silently broke on
clean runners (local-ci run 23).
Bootstrap the session through /__debug/store before navigating to
/lobby: load a device keypair, set a deterministic device session
id. The synthetic flow itself still bypasses the gateway entirely;
the seed only ensures `session.status === "authenticated"` so the
layout guard lets the lobby through.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Ilia Denisov
3694847792