I have the same impressions. Typing helps a lot, and (I think) in a few ways - one is being a safe guard, second a constraint (so say, AI is less likely to create a clunky variable which can be a string, list, or a few other things), third - to prompt into writing solid code in general.

I add one more step - add strong linting (ESLint with all recommended rules switched on, Ruff for Python) and asking to run it after each edit.

Usually I also prompt to type things well, and avoid optional types unless strictly necessary (LLMs love to shrink responsibility that way).

For example, see my recent vibe-coding instructions, https://github.com/QuesmaOrg/demo-webr-ggplot/blob/main/CLAU....