diff --git a/scripts/git-hooks/pre-commit b/scripts/git-hooks/pre-commit
index ff710bd..9014a4e 100755
--- a/scripts/git-hooks/pre-commit
+++ b/scripts/git-hooks/pre-commit
@@ -43,3 +43,18 @@ if has_staged_match '^client/scripts/.*\.gd$'; then
 		exit 1
 	fi
 fi
+
+# Enforce explicit AAA markers in changed C# test files.
+for f in "${staged_files[@]}"; do
+	if [[ ! "$f" =~ ^server/NeonSprawl\.Server\.Tests/.*Tests\.cs$ ]]; then
+		continue
+	fi
+	if [[ ! -f "$f" ]]; then
+		continue
+	fi
+	if ! rg -q 'Arrange' "$f" || ! rg -q 'Act' "$f" || ! rg -q 'Assert' "$f"; then
+		echo "pre-commit: $f is missing explicit AAA markers (Arrange/Act/Assert)." >&2
+		echo "Add clear Arrange/Act/Assert sections in changed C# tests." >&2
+		exit 1
+	fi
+done