diff --git a/godot/scripts/util/config_paths.gd b/godot/scripts/util/config_paths.gd
new file mode 100644
index 0000000..06f44a7
--- /dev/null
+++ b/godot/scripts/util/config_paths.gd
@@ -0,0 +1,49 @@
+extends Node
+## Cross-platform config directory utility.
+## Resolves config directories following OS conventions:
+## - Windows: %APPDATA%\chobit\
+## - macOS: ~/Library/Application Support/chobit/
+## - Linux: $XDG_CONFIG_HOME/chobit/ or ~/.config/chobit/
+
+class_name ConfigPaths
+
+
+## Get the base config directory for the current OS.
+static func get_config_dir(app_name: String = "chobit") -> String:
+	match OS.get_name():
+		"Windows":
+			var appdata := OS.get_environment("APPDATA")
+			if appdata.is_empty():
+				appdata = OS.get_environment("USERPROFILE") + "\\AppData\\Roaming"
+			return appdata + "\\" + app_name
+		"macOS":
+			var home := OS.get_environment("HOME")
+			if home.is_empty():
+				push_error("ConfigPaths: HOME environment variable not set")
+				return ""
+			return home + "/Library/Application Support/" + app_name
+		_:  # Linux and others
+			var xdg_config := OS.get_environment("XDG_CONFIG_HOME")
+			if not xdg_config.is_empty():
+				return xdg_config + "/" + app_name
+			var home := OS.get_environment("HOME")
+			if home.is_empty():
+				push_error("ConfigPaths: HOME environment variable not set")
+				return ""
+			return home + "/.config/" + app_name
+
+
+## Get full path to a config file in the config directory.
+## Ensures the directory exists.
+static func get_config_file(filename: String, app_name: String = "chobit") -> String:
+	var config_dir := get_config_dir(app_name)
+	if config_dir.is_empty():
+		return ""
+
+	# Create directory if it doesn't exist
+	var err := DirAccess.make_dir_recursive_absolute(config_dir)
+	if err != OK:
+		push_error("ConfigPaths: Failed to create directory %s (error: %d)" % [config_dir, err])
+		return ""
+
+	return config_dir + ("/" if OS.get_name() != "Windows" else "\\") + filename
diff --git a/godot/scripts/util/node_utils.gd b/godot/scripts/util/node_utils.gd
index 622bbfa..7f15aa0 100644
--- a/godot/scripts/util/node_utils.gd
+++ b/godot/scripts/util/node_utils.gd
@@ -3,9 +3,7 @@ extends RefCounted
 ## Static utility methods for node tree traversal.
 
 
-static func find_child_of_type(
-	node: Node, type_name: String
-) -> Node:
+static func find_child_of_type(node: Node, type_name: String) -> Node:
 	if node.get_class() == type_name:
 		return node
 	for child: Node in node.get_children():
@@ -29,9 +27,7 @@ static func find_first_mesh_with_blendshapes(
 	return null
 
 
-static func find_blend_shape_index(
-	mesh: MeshInstance3D, shape_name: String
-) -> int:
+static func find_blend_shape_index(mesh: MeshInstance3D, shape_name: String) -> int:
 	if mesh == null or mesh.mesh == null:
 		return -1
 	for i: int in range(mesh.mesh.get_blend_shape_count()):
@@ -40,12 +36,50 @@ static func find_blend_shape_index(
 	return -1
 
 
-static func find_bone_case_insensitive(
-	skeleton: Skeleton3D, bone_name: String
-) -> int:
+static func find_bone_case_insensitive(skeleton: Skeleton3D, bone_name: String) -> int:
 	var idx := skeleton.find_bone(bone_name)
 	if idx == -1:
 		idx = skeleton.find_bone(bone_name.to_lower())
 	if idx == -1:
 		idx = skeleton.find_bone(bone_name.to_upper())
 	return idx
+
+
+static func read_vrm_morph_names(vrm_path: String) -> PackedStringArray:
+	## Reads original morph target names from a .vrm (GLB) file's JSON chunk.
+	## VRM4Godot renames blendshapes to morph_N during import, but the
+	## original names (e.g. Japanese MMD names) are preserved in
+	## mesh.primitives[].extras.targetNames inside the GLB JSON.
+	var f := FileAccess.open(vrm_path, FileAccess.READ)
+	if f == null:
+		return PackedStringArray()
+
+	# GLB header: magic(4) + version(4) + length(4)
+	f.get_32()
+	f.get_32()
+	f.get_32()
+
+	# First chunk: length(4) + type(4) + JSON data
+	var chunk_length := f.get_32()
+	f.get_32()
+	var json_bytes := f.get_buffer(chunk_length)
+	f.close()
+
+	var json := JSON.new()
+	if json.parse(json_bytes.get_string_from_utf8()) != OK:
+		return PackedStringArray()
+
+	var data: Dictionary = json.data
+	var meshes: Array = data.get("meshes", [])
+	for mesh_data: Variant in meshes:
+		var primitives: Array = mesh_data.get("primitives", [])
+		for prim: Variant in primitives:
+			var extras: Dictionary = prim.get("extras", {})
+			var target_names: Array = extras.get("targetNames", [])
+			if target_names.size() > 0:
+				var result := PackedStringArray()
+				for n: Variant in target_names:
+					result.append(str(n))
+				return result
+
+	return PackedStringArray()
diff --git a/godot/scripts/util/screen_cursor.gd b/godot/scripts/util/screen_cursor.gd
new file mode 100644
index 0000000..6cf140b
--- /dev/null
+++ b/godot/scripts/util/screen_cursor.gd
@@ -0,0 +1,61 @@
+class_name ScreenCursor
+extends RefCounted
+## Maps the global mouse position to a normalized -1..1 range
+## relative to the window center, using screen edges as bounds.
+## Handles multi-monitor and Wayland focus limitations.
+
+## Max pixel distance from window center that maps to 1.0.
+## Prevents over-sensitive tracking on ultra-wide setups.
+const MAX_RANGE_PX: float = 2000.0
+
+static var _last_valid: Vector2 = Vector2.ZERO
+
+
+static func get_normalized_position() -> Vector2:
+	var ds := DisplayServer
+	var mouse := ds.mouse_get_position()
+	var win_pos := ds.window_get_position()
+	var win_size := ds.window_get_size()
+
+	var cx := win_pos.x + win_size.x / 2
+	var cy := win_pos.y + win_size.y / 2
+
+	var dx := float(mouse.x - cx)
+	var dy := float(mouse.y - cy)
+
+	# On Wayland, mouse position may freeze at (0,0) when unfocused
+	if mouse.x == 0 and mouse.y == 0:
+		return _last_valid
+
+	# Use screen the window is on for bounds
+	var screen_idx := ds.window_get_current_screen()
+	var screen_rect := ds.screen_get_usable_rect(screen_idx)
+	var screen_pos := screen_rect.position
+	var screen_size := screen_rect.size
+
+	# Distance from window center to each screen edge
+	var dist_left := maxf(float(cx - screen_pos.x), 1.0)
+	var dist_right := maxf(float(screen_pos.x + screen_size.x - cx), 1.0)
+	var dist_up := maxf(float(cy - screen_pos.y), 1.0)
+	var dist_down := maxf(float(screen_pos.y + screen_size.y - cy), 1.0)
+
+	# Cap range so ultra-wide screens don't make gaze too sensitive
+	dist_left = minf(dist_left, MAX_RANGE_PX)
+	dist_right = minf(dist_right, MAX_RANGE_PX)
+	dist_up = minf(dist_up, MAX_RANGE_PX)
+	dist_down = minf(dist_down, MAX_RANGE_PX)
+
+	var nx: float = 0.0
+	if dx > 0.0:
+		nx = clampf(dx / dist_right, 0.0, 1.0)
+	elif dx < 0.0:
+		nx = clampf(dx / dist_left, -1.0, 0.0)
+
+	var ny: float = 0.0
+	if dy > 0.0:
+		ny = -clampf(dy / dist_down, 0.0, 1.0)
+	elif dy < 0.0:
+		ny = -clampf(dy / dist_up, -1.0, 0.0)
+
+	_last_valid = Vector2(nx, ny)
+	return _last_valid
diff --git a/godot/scripts/util/screen_cursor.gd.uid b/godot/scripts/util/screen_cursor.gd.uid
new file mode 100644
index 0000000..e3010fb
--- /dev/null
+++ b/godot/scripts/util/screen_cursor.gd.uid
@@ -0,0 +1 @@
+uid://bwevi2bwdn3bp