The fault-injecting server served one-off manual rehearsal only and would drift silently from the real services; the doc now says how to point the desktop at any local stand-in (the three env overrides) and what such a stand-in has to speak. The dev-only HERMES_EXTRA_WELCOME_HOSTS override stays, pinned by a test in test_anon_failure_modes. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>