Replace dasher-pack with unified animation-pack using original Blender bone names

addons/godot_ai/handlers/_param_validators.gd

@@ -0,0 +1,48 @@
+@tool
+class_name McpParamValidators
+extends RefCounted
+
+const ErrorCodes := preload("res://addons/godot_ai/utils/error_codes.gd")
+
+## Type-check a JSON-decoded param Variant before assigning it into a typed
+## GDScript local. The dispatcher only catches handler crashes as an opaque
+## "malformed result" (issue #210), so a typed assignment like
+##   var group: String = params.get("group", "")
+## will runtime-error and bubble up without telling the caller which param
+## was the wrong shape. Handlers should guard untrusted values with one of
+## the require_*() helpers below and return its error dict on mismatch.
+
+
+## Returns null iff `value` is a String or StringName. On any other type
+## returns an INVALID_PARAMS error dict whose message names both `name` and
+## the actual Variant type (via Godot's built-in `type_string`).
+static func require_string(name: String, value: Variant) -> Variant:
+	var t := typeof(value)
+	if t == TYPE_STRING or t == TYPE_STRING_NAME:
+		return null
+	return ErrorCodes.make(
+		ErrorCodes.WRONG_TYPE,
+		"Param '%s' must be a String, got %s" % [name, type_string(t)],
+	)
+
+
+## Returns null iff `value` is an int. Floats are rejected — JSON decoders
+## that emit `1.0` for an integer slot will surface a clear error here
+## rather than silently truncating downstream.
+static func require_int(name: String, value: Variant) -> Variant:
+	if typeof(value) == TYPE_INT:
+		return null
+	return ErrorCodes.make(
+		ErrorCodes.WRONG_TYPE,
+		"Param '%s' must be an int, got %s" % [name, type_string(typeof(value))],
+	)
+
+
+## Returns null iff `value` is a bool.
+static func require_bool(name: String, value: Variant) -> Variant:
+	if typeof(value) == TYPE_BOOL:
+		return null
+	return ErrorCodes.make(
+		ErrorCodes.WRONG_TYPE,
+		"Param '%s' must be a bool, got %s" % [name, type_string(typeof(value))],
+	)