profile: stop shadowing exit

`exit` was a function that ran `tmux detach` instead of exiting, whenever a
shell was interactive and inside tmux. What it bought was a keystroke: tmux
already binds detach to prefix-d, which this config does not touch.

What it cost was an afternoon. Claude Code captures shell functions into a
snapshot and sources it in every tool call, so agent shells inheriting $TMUX
ran the function too: terminal windows closed on their own for weeks before
anyone connected it to `exit`, and a poll loop that called `exit 0` detached a
client every minute instead of stopping, because the function detached and then
returned. The call-time guard added on 2026-07-16 fixed that case; it did not
make shadowing a POSIX builtin a good idea.

Nothing in either repo calls it and nothing documents the behaviour.

1 files changed, 0 insertions, 11 deletions

diff --git a/config/profile b/config/profile
index 8f63f9e..e3843ed 100755
--- a/config/profile
+++ b/config/profile
@@ -109,17 +109,6 @@ HISTSIZE=1000000
 # shellcheck disable=SC2034
 SAVEHIST=1000000
 
-# detach from tmux by default
-# Guard at call time, not definition time.
-# functions and sources them in non-interactive tool shells that inherit
-# $TMUX, where a bare `exit` must really exit (not detach the terminal).
-exit() {
-  if [[ -n "${TMUX:-}" ]] && [[ $- == *i* ]]; then
-    tmux detach
-  else
-    builtin exit "$@"
-  fi
-}
 exists() { command -v "$1" >/dev/null 2>&1; } # Check if command exists (is in path).
 lspath() { echo "$PATH" | tr ':' '\n'; } # list PATH entries
 pathadd() { [[ -d "$1" ]] && PATH="$1"$(echo ":$PATH:" | sed "s|:$1:|:|" | sed 's|:$||'); }