From edf26aa45d7b660f6c922b740aa571238764dfb8 Mon Sep 17 00:00:00 2001
From: Davide Cappellini <signorsasso@gmail.com>
Date: Fri, 21 Aug 2026 22:17:55 +0200
Subject: [PATCH] fix(SAC_LSTM_Bot): enforce MaxHidden cap on
 SACLSTM_HIDDEN_SIZE (review of #48/#49)

---
 SAC_LSTM_Bot/src/SAC_LSTM_Bot.nim | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/SAC_LSTM_Bot/src/SAC_LSTM_Bot.nim b/SAC_LSTM_Bot/src/SAC_LSTM_Bot.nim
index 2cb5dc7..ac5fe22 100644
--- a/SAC_LSTM_Bot/src/SAC_LSTM_Bot.nim
+++ b/SAC_LSTM_Bot/src/SAC_LSTM_Bot.nim
@@ -207,6 +207,11 @@ method run(bot: SacBot) =
 
     # Weight sync (Q7/Q11): always-latest; rebuild this thread's tensors on change.
     if pullWeights(myVersion, myHidden, flat):
+      if myHidden > MaxHidden:
+        # hArr/cArr are fixed-capacity; a bigger SACLSTM_HIDDEN_SIZE would
+        # heap-overflow them in tensorToHidden. Loud misconfig beats corruption.
+        raise newException(ValueError, "SACLSTM_HIDDEN_SIZE=" & $myHidden &
+          " exceeds MaxHidden=" & $MaxHidden & " (bot-side LSTM persistence cap)")
       var cur = 0
       actor = actorFromFlat(flat, cur, myHidden)
       actorReady = true