What's one tool you started using this year that changed how you work?

I don't mean the ones you tried for a weekend. I mean the one that stuck.

Mine is omp (oh-my-pi), an open source coding agent that runs in the terminal. I use it for most of

my coding now. I still decide what gets built, but I barely write glue code or config by hand

anymore.

What's yours? It can be an agent, an editor, a model, or some small CLI you'd never give up.