Caught in review. root_door_of matched unanchored substrings, so any value
that EXTENDS a real one resolved as that value: `root-door=closedish` read as
`closed` and PASSED close-root's gate -- the one arm in this repo that
authorizes an irreversible act -- and `class=humanoid` did the same through
the compat arm. Both contradicted the function's own header, which promises a
value outside the set resolves empty and fails closed.
Only reachable by hand-editing a marker, so it was never a live incident. It
gets fixed anyway because this is the single function every consumer trusts --
close-root's gate, apply's root-SSH note, and bootstrap-tenant's machine
guard all ask it -- and a resolver that is nearly right about a root door is
the wrong kind of nearly.
The marker is one line of space-separated key=value fields (bootstrap writes
it with a single printf), so padding both ends and matching on field
boundaries is exact rather than heuristic. Whitespace is normalised first so a
hand-edit using tabs still reads correctly -- anchoring must not trade one
silent misread for another.
BOTH vocabularies are anchored. Fixing only the current spelling would have
left the hole open on every box bootstrapped before #77, which is precisely
the population the compat arm exists to serve.
Tests pin the resolver and the end-to-end refusal, since the resolver
returning "" is only safe because consumers treat it as one. Reverting the
anchoring turns the suite red (447/4); restoring it returns 451/0. The
original compat proof still holds: removing the class= arm gives 441/10.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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