Ah, you’re right, thanks. I read that sign stealing was allowed, and missed the parts about devices being banned.

Runners on 2B are allowed to try to steal signs if they can crack whatever set the pitcher and catcher have switched to (well they use pitch com now); the astros used live video feeds to pick up the signs even with no one on base as well as computer assisted methods to crack the codes, and then related the pitches to the batter via the dugout.