From 19f34abf0ce4d3d7d75aa734cca852a074fa5377 Mon Sep 17 00:00:00 2001
From: Davide Cappellini <signorsasso@gmail.com>
Date: Sat, 22 Aug 2026 21:09:07 +0200
Subject: [PATCH] fix(SAC_LSTM_Bot): freeze mirror-twin via eval-mode gate in
 twin launcher
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SACLSTM_EVAL_MODE=1 in SacTwin.sh suppresses all sendTrainingMsg traffic
(lever-4 gate), so the twin never trains — not even in-RAM within a battle.
Required now that the main bot's SACLSTM_SAVE_INTERVAL drops to 1 (v2 relaunch
after checkpoint-cadence diagnosis): without the gate the twin would persist
per-battle drift and stop being the frozen reproducible opponent #54 specifies.
---
 SAC_LSTM_Bot/make_twin.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/SAC_LSTM_Bot/make_twin.sh b/SAC_LSTM_Bot/make_twin.sh
index 2858cee..1955b28 100755
--- a/SAC_LSTM_Bot/make_twin.sh
+++ b/SAC_LSTM_Bot/make_twin.sh
@@ -46,6 +46,11 @@ cat > "$TARGET/SacTwin.sh" <<'EOF'
 DIR="$(cd "$(dirname "$0")" && pwd)"
 export SACLSTM_BOT_JSON="$DIR/SacTwin.json"
 export SACLSTM_WEIGHTS_PATH="$DIR/weights/sac_latest.zip"
+# Freeze contract (#54): the twin is a FROZEN sparring partner, not a
+# co-learner. Eval-mode gate (lever 4) suppresses all sendTrainingMsg traffic,
+# so the twin never trains — not even in-RAM within a battle. Without this,
+# any main-bot checkpoint-interval change would let twin drift accumulate.
+export SACLSTM_EVAL_MODE=1
 exec "$DIR/SAC_LSTM_Bot"
 EOF
 chmod +x "$TARGET/SacTwin.sh" "$TARGET/SAC_LSTM_Bot"