Builtin Library
README.md
show.close
Close a panel opened with show.file or show.text — the same as the user
closing its tab. A panel the user already closed answers closed = false.
A panel holding the user's unsaved edits stays open: the user is asked to save
or discard them, and the answer carries closed = false with pending saying
so.
show.close { panel = "show:3" }
Returns { closed, pending? }.