libtmux:show-option

Acquire one decoded option; return VALUE, PRESENT-P and a read-outcome vector. False returns NIL,T; absence returns NIL,NIL. KEY selects an entry only after acquiring a whole named array. A missing key does not fall through a present local array. Mutable key text is copied before I/O and bounded to 1 MiB UTF-8. Keys normalize under the exact live catalog before payload reads. Scopes, limits, inheritance, ownership and failure evidence follow SHOW-OPTIONS.