What helped my RSI:

- Using mouse less

- Ergonomic keyboard

- Learning to type better (I still suck, but speed is fast enough, and I don't get a soar neck or fingers from my previous glance at KB then back to monitor and smash keys)

- Positioning top of monitor to eye level

- Gradually transitioning from programming through rapid trial and error, to building and exploring logical models of programs in my head, then type out some code that usually works.

All my experiments and usage of AI if anything lead to more typing rather than less.