Last month I spent an evening adding type hints to a 4,000-line GDScript codebase that had been running fine for a year. I expected nothing. By the time I finished, the editor had flagged 12 latent bugs I had never noticed: wrong return types, methods called with stale signatures, a Vector2 being passed where the function expected Vector3 . Every single one of those would have eventually crashed in production. Three of them already had: I just blamed them on something else when the bug reports came in. Static typing in GDScript is one of those features that sounds boring on the docs page and turns out to be the biggest quality-of-life upgrade you can make to a Godot 4 project. It is faster too. Independent benchmarks put the gain at 28-59% on hot paths , driven by the engine bypassing Variant dispatch when types are known at compile time. This post is the case for using type hints everywhere, including the gotchas I hit, and how to retrofit a typed style into a codebase that does not have it.…