Sensors everywhere. If it's at all relevant to what you're working on, providing a different way of viewing something, and a skill description on how to do that, has these long-compounding effects that are magic at first, and then become "of course, it should always just work" as your expectation.
My product that I'm working on sorta acquired a bunch of that. I put a ton of work into making a browser that could just see / interact w/ the web in a ton of different contexts. Now that I have it, it's pretty amazing to just have the agent do everything I need it to ( pull a network log, debug JS, navigate a form ), and it has the appropriate context everywhere.