[MrJohz]

That's an interesting decision, because it's the reverse of one of the big complaints about Typescript: that it only works up to the API boundary, and doesn't include external data sources (unless you use libraries like Zod to combine runtime and static type checking).

For me, Typescript is more useful, the more of the codebase I "own", because it means I can be more confident that all the types reflect the true types of the runtime data, which means I can change things more confidently and quickly. Do you find that you're refactoring and changing things less with dynamic languages? For me, I think that's the number one magic feature that I miss when I use languages without explicit type systems.