Love how flexible Vitest is. Hooks & lazy fixtures make it very easy to piece together stuff like a per-suite `--bail`.

Spent ages trying to get the correct types for inherited static methods in TypeScript. This worked in the end:

github.com/microsoft/Ty...

Weird that it doesn't seem to have first-class support.

Big fan of using ESLint to impose restrictions on module/file imports, especially in today's landscape of mixing server/client/infrastructure code:

https://github.com/import-js/eslint-plugin-import

Helps keep everything clean, and ensures new (and old!) dev's don't foot-gun themselves.