diff --git a/scripts/gate-session-hygiene.sh b/scripts/gate-session-hygiene.sh
index 6e962a4..179b4ec 100755
--- a/scripts/gate-session-hygiene.sh
+++ b/scripts/gate-session-hygiene.sh
@@ -14,11 +14,14 @@ echo "[hygiene] pruefe Working Tree..."
 [ -z "$(git status --porcelain)" ] || note "Working Tree nicht sauber."
 
 echo "[hygiene] STATE.md im aktuellen Branch aktualisiert?"
-base=$(git merge-base HEAD main 2>/dev/null || git rev-parse HEAD~1 2>/dev/null || true)
-if [ -n "$base" ]; then
+base=$(git merge-base HEAD main 2>/dev/null || true)
+head=$(git rev-parse HEAD 2>/dev/null || true)
+if [ -n "$base" ] && [ "$base" != "$head" ]; then
+  # echte Divergenz (Feature-Branch): Diff gegen Abzweigpunkt
   git diff --name-only "$base"...HEAD | grep -q '^STATE.md$' || \
     note "STATE.md im aktuellen Branch nicht aktualisiert."
 else
+  # auf main/Integration oder Root-Commit: letzten Commit pruefen
   git log -1 --name-only --pretty= | grep -q '^STATE.md$' || \
     note "STATE.md im letzten Commit nicht angefasst."
 fi