diff --git a/bin/agent-loop.sh b/bin/agent-loop.sh
index 83e2cf32..ff892d34 100755
--- a/bin/agent-loop.sh
+++ b/bin/agent-loop.sh
@@ -17,6 +17,7 @@ case "$AGENT" in
   claude) TOOL="claude"; MODEL="sonnet" ;;
   gemini) TOOL="gemini"; MODEL="gemini-2.5-pro-preview-05-06" ;;
   grok)   TOOL="opencode"; MODEL="grok-3-fast" ;;
+  gemma4) TOOL="hermes"; MODEL="google/gemma-4-31b-it"; PROVIDER="openrouter" ;;
   *)      TOOL="$AGENT"; MODEL="" ;;
 esac