WIP checkpoint: Research and design GDScript sandboxing approach

sandbox_probe/probe2.gd

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+extends Node
+
+func _ready():
+	print("=== SANDBOX PROBE 2: ScriptServer & Restrictions ===")
+	probe_scriptserver()
+	probe_script_restrictions()
+	probe_engine_restrictions()
+	probe_global_scope()
+	probe_classdb()
+	probe_script_extension()
+	print("=== SANDBOX PROBE 2 END ===")
+	get_tree().quit()
+
+func probe_scriptserver():
+	print("--- ScriptServer ---")
+	# Is ScriptServer available? It's a static class in Godot 4.
+	print("ScriptServer exists: ", ClassDB.class_exists("ScriptServer"))
+	if ClassDB.class_exists("ScriptServer"):
+		# What methods does it expose?
+		var methods = ClassDB.class_get_method_list("ScriptServer")
+		for m in methods:
+			print("  ScriptServer method: ", m.name, " args=", m.args.size())
+
+func probe_script_restrictions():
+	print("--- Script restrictions ---")
+	# Can we restrict script loading via ProjectSettings?
+	var keys = [
+		"debug/gdscript/warnings/",
+		"debug/gdscript/",
+		"application/run/",
+	]
+	for k in keys:
+		var settings = ProjectSettings.get_setting(k)
+		print("  ProjectSettings['", k, "'] = ", settings)
+
+func probe_engine_restrictions():
+	print("--- Engine restrictions ---")
+	# Check if there's any sandbox/restriction setting
+	var all_settings = ProjectSettings.get_property_list()
+	var sandbox_like = []
+	for s in all_settings:
+		var name = String(s.name)
+		if "sandbox" in name.to_lower() or "restrict" in name.to_lower() or "security" in name.to_lower():
+			sandbox_like.append(name)
+	print("  Sandbox/restrict/security settings found: ", sandbox_like)
+
+func probe_global_scope():
+	print("--- Global scope ---")
+	# What global classes/functions are available to scripts?
+	# Check if we can enumerate global scope
+	var global_classes = []
+	if ClassDB.class_exists("GlobalScope"):
+		var methods = ClassDB.class_get_method_list("GlobalScope")
+		for m in methods:
+			global_classes.append(m.name)
+	print("  GlobalScope methods count: ", global_classes.size())
+	# Key dangerous globals
+	var dangerous = ["OS", "FileAccess", "DirAccess", "TCPServer", "HTTPClient", "ProjectSettings", "Engine", "ResourceLoader", "ClassDB", "Expression", "JavaScriptBridge"]
+	for d in dangerous:
+		print("  Class '", d, "' exists: ", ClassDB.class_exists(d))
+
+func probe_classdb():
+	print("--- ClassDB ---")
+	# Can scripts access ClassDB to instantiate arbitrary classes?
+	print("  ClassDB.class_exists('Node') = ", ClassDB.class_exists("Node"))
+	# Can we get all classes?
+	var all_classes = ClassDB.get_class_list()
+	print("  ClassDB.get_class_list().size() = ", all_classes.size())
+
+func probe_script_extension():
+	print("--- Script extension / custom interpreter ---")
+	# Check if ScriptExtension exists (for custom script languages)
+	print("  ScriptExtension exists: ", ClassDB.class_exists("ScriptExtension"))
+	# Check GDScript internals
+	print("  GDScript class exists: ", ClassDB.class_exists("GDScript"))
+	var gd_methods = ClassDB.class_get_method_list("GDScript")
+	for m in gd_methods:
+		print("  GDScript method: ", m.name)