What
Claude Code sometimes runs tmux, a terminal tool that keeps several terminal sessions open inside one window. Two of its tmux calls now go through a different internal helper that accepts an options argument:
tmux -V, which checks the installed tmux versionkill-session, which closes a tmux session
Why
The commands are the same, but the way Claude Code launches them has changed. This is mainly relevant if tmux behaviour around these two steps looks different from before.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
The finding does not say what the new options argument changes about how these commands run.