Godot Save Load Systems

This is a comprehensive blueprint for building save systems in Godot, covering JSON and binary serialization, the PERSIST group pattern for auto-saving nodes, and version migration. It includes a ready-to-use SaveManager autoload, shows how to safely serialize player data without storing Node references directly, and hammers home critical mistakes like skipping version fields or using absolute paths instead of user://. The NEVER section is extensive and legitimately useful, warning about everything from file handle leaks to the security risks of allow_objects in binary saves. You also get encryption helpers and threaded loading patterns. If you're implementing any kind of data persistence in Godot, whether it's player progress, settings, or game state, this gives you the patterns to do it correctly without corrupting saves or breaking cross-platform compatibility.