Hidden Exits
An exit can be hidden from ordinary room presentation with its view lock.
Searching can discover such an exit for an individual character.
Discovery is observer-relative: finding a hidden exit does not automatically
make it visible to everyone else. The Room presentation incorporates the
searcher's remembered discoveries while preserving the underlying canonical
exit and lock state.
Builders should use normal Evennia exit/view locks for the hidden-state
boundary rather than creating a second fake doorway object merely for
presentation.