diff --git a/scripts/sx-loops-down.sh b/scripts/sx-loops-down.sh
new file mode 100755
index 00000000..10c2fb49
--- /dev/null
+++ b/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."
diff --git a/scripts/sx-loops-up.sh b/scripts/sx-loops-up.sh
new file mode 100755
index 00000000..c45d53a7
--- /dev/null
+++ b/scripts/sx-loops-up.sh
@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+# Spawn 7 claude sessions in tmux, one per language loop.
+# Each runs /loop against its briefing, doing ONE iteration per fire.
+#
+# Usage: ./scripts/sx-loops-up.sh [interval]
+#   interval defaults to self-paced (omit to let model decide)
+#
+# After the script prints done:
+#   tmux a -t sx-loops
+#   Ctrl-B + <window-number> to switch
+#   Ctrl-B + d to detach (loops keep running)
+set -euo pipefail
+
+cd "$(dirname "$0")/.."
+SESSION="sx-loops"
+INTERVAL="${1:-}"    # e.g. "15m", or empty for self-paced
+BOOT_WAIT=20         # seconds to wait for each claude to boot before sending /loop
+
+if tmux has-session -t "$SESSION" 2>/dev/null; then
+  echo "Session '$SESSION' already exists."
+  echo "  Attach:  tmux a -t $SESSION"
+  echo "  Kill:    tmux kill-session -t $SESSION"
+  exit 1
+fi
+
+declare -A BRIEFING=(
+  [lua]=lua-loop.md
+  [prolog]=prolog-loop.md
+  [forth]=forth-loop.md
+  [erlang]=erlang-loop.md
+  [haskell]=haskell-loop.md
+  [js]=loop.md
+  [hs]=hs-loop.md
+)
+ORDER=(lua prolog forth erlang haskell js hs)
+
+# Create tmux session with 7 windows, one per language
+tmux new-session -d -s "$SESSION" -n "${ORDER[0]}" -c "$PWD"
+for lang in "${ORDER[@]:1}"; do
+  tmux new-window -t "$SESSION" -n "$lang" -c "$PWD"
+done
+
+# Start claude in each window
+echo "Starting 7 claude sessions..."
+for lang in "${ORDER[@]}"; do
+  tmux send-keys -t "$SESSION:$lang" "claude" C-m
+done
+
+echo "Waiting ${BOOT_WAIT}s for claude to boot in each window..."
+sleep "$BOOT_WAIT"
+
+# Send the /loop command in each window
+for lang in "${ORDER[@]}"; do
+  briefing="${BRIEFING[$lang]}"
+  if [ -n "$INTERVAL" ]; then
+    cmd="/loop $INTERVAL Read plans/agent-briefings/$briefing and do ONE iteration per fire: pick the first unchecked [ ] from the plan, implement, test, commit with a short factual message, tick the box, append one dated line to the Progress log (newest first), then stop. Push to origin/loops/$lang (branch per language; never main). Stay strictly in the briefing's scope. Never push to main."
+  else
+    cmd="/loop Read plans/agent-briefings/$briefing and do ONE iteration per fire: pick the first unchecked [ ] from the plan, implement, test, commit with a short factual message, tick the box, append one dated line to the Progress log (newest first), then stop. Push to origin/loops/$lang (branch per language; never main). Stay strictly in the briefing's scope. Never push to main."
+  fi
+  tmux send-keys -t "$SESSION:$lang" "$cmd" C-m
+done
+
+echo ""
+echo "Done. 7 loops started in tmux session '$SESSION'."
+echo ""
+echo "  Attach:    tmux a -t $SESSION"
+echo "  Switch:    Ctrl-B then window number 0-6 (lua=0, prolog=1, forth=2, erlang=3, haskell=4, js=5, hs=6)"
+echo "  Or index:  Ctrl-B w  (lists windows)"
+echo "  Detach:    Ctrl-B d"
+echo "  Kill all:  tmux kill-session -t $SESSION"
+echo ""
+echo "If a window did NOT enter /loop mode (boot was slow), attach and paste the /loop command manually."