Run the doctor on a healthy host and it reported three problems, all of
them its own:
· dns.mode=none was flagged as leftover rehearsal dirt. It is now the
SHIPPED setting — it is what stops a box enumerating its siblings.
Its absence is the fault; its presence was being "fixed" away.
· the nft check used 'sudo -n', which fails without cached credentials,
so it reported the box-to-box rule MISSING on a host where 'sudo nft
list' plainly shows it.
· the kernel's bridge view — the one fact that settles the isolation
question — was skipped with "'bridge' not installed". It is installed;
it lives in /usr/sbin, which is not on a normal user's PATH.
· and the DNS probe looked only for the drill's own box names, so it
said "no box to probe with" while two boxes sat there RUNNING.
A diagnostic that cries wolf is worse than no diagnostic: it costs the
same trust as a real failure and teaches you to ignore it. All four now
report what is actually true.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
