Implement production vertical slice foundation

scripts/check_architecture.sh

@@ -16,6 +16,24 @@ fail_with_matches() {
 	fi
 }
 
+if ! rg -q 'config/features=.*"Forward Plus"' project.godot; then
+	fail_with_matches \
+		"production project must declare Forward Plus" \
+		"project.godot does not declare the Forward Plus feature"
+fi
+
+renderer_overrides="$(rg -n '^renderer/rendering_method' project.godot || true)"
+fail_with_matches "production project overrides its Forward+ renderer" "$renderer_overrides"
+
+autoload_entries="$({
+	awk '
+		/^\[autoload\]$/ { in_autoload = 1; next }
+		/^\[/ { in_autoload = 0 }
+		in_autoload && /^[^;[:space:]][^=]*=/ { print NR ":" $0 }
+	' project.godot
+} || true)"
+fail_with_matches "custom autoloads require an ADR" "$autoload_entries"
+
 source_directories="src tests"
 if [ -d game ]; then
 	source_directories="$source_directories game"