The trait was named for who lives on a box; what it decides is whether
root SSH stays open as the control plane's automation door. Those are
different questions, and `dev-server` proved it: an unattended VM-host
appliance nobody lives on, correctly class=human because its root door
must close. After #76 gave `-server` the job of naming the machine
family, that box carried a suffix saying server and a trait saying
human. `dev-server --root-door closed` says what is true, once.
Unlike #76's role rename this field is read back on live machines, so
the compat read is mandatory rather than courteous: one resolver,
root_door_of, reads both vocabularies and every consumer goes through
it — close-root's gate, apply's note, and bootstrap-tenant's
machine-marker guard, which used the presence of `class=` as its "is
this a real fleet machine?" test and would otherwise have let a tenant
converge clobber a live box. New markers are written as `root-door=`
only. Markers carrying both fields in disagreement, or neither, fail
closed with a re-run-bootstrap repair.
Fixture markers are kept deliberately at the retired spelling (the
convention #76's pre-rename-cp fixture established) and pinned at both
consumers; deleting the compat arm turns ten checks red.
Closes#77
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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