The script was committed mode 100644; a fresh clone could not run
./party, and the bats suite fails with EACCES 126 wherever it invokes
"$PARTY_BIN" directly. Makefile installs masked this via install -m 0755.
tmux session_check_name() silently rewrites '.' to '_', so a dotted
party name desyncs from its tmux session and every -t lookup fails
(verified on tmux 3.3a through 3.6b). Leading-dash names can never be
addressed through the CLI parsers.
tmux-party: share a tmux session with people on the same UNIX host.
Single-file POSIX shell (party) with a filesystem + tmux server-access
trust model. See README.md.
