Local sx-loops tmux launcher: 7 claude sessions, one per language

sx-loops-up.sh spawns a tmux session 'sx-loops' with 7 windows (lua,
prolog, forth, erlang, haskell, js, hs). Each window runs 'claude'
and then /loop against its briefing at plans/agent-briefings/<x>-loop.md.
Optional arg is the interval (e.g. 15m); omit for model-self-paced.

Each loop does ONE iteration per fire: pick the first unchecked [ ] item,
implement, test, commit, tick, log — then stop. Commits push to
origin/loops/<lang> (safe; not main).

sx-loops-down.sh sends /exit to each window and kills the session.

Attach with: tmux a -t sx-loops

scripts/sx-loops-down.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Stop the sx-loops tmux session. Prompts the claude sessions to exit cleanly
+# first (/exit in each window), then kills the tmux session after a grace
+# period. Loops stop immediately; in-progress iterations commit what they have.
+set -euo pipefail
+
+SESSION="sx-loops"
+
+if ! tmux has-session -t "$SESSION" 2>/dev/null; then
+  echo "No sx-loops session running."
+  exit 0
+fi
+
+WINDOWS=$(tmux list-windows -t "$SESSION" -F '#W')
+for w in $WINDOWS; do
+  tmux send-keys -t "$SESSION:$w" "/exit" C-m 2>/dev/null || true
+done
+
+echo "Sent /exit to all windows. Waiting 5s for clean shutdown..."
+sleep 5
+
+tmux kill-session -t "$SESSION"
+echo "Killed sx-loops session."