Ask HN: Useful (Non-Coding) Agents?

While not every programmer agrees, a huge number of them feel like they are getting tremendous value from coding agents. Certainly that is my experience.

However, I have yet to find something that is both "agentic" (in terms of the experience of using it) and useful -- in fact, not only are most "agents" less than useless, they are so frustrating I want to scream at my computer. (I'm thinking in particular of the Delta chatbot).

So, who has examples of agents put to real and good use in (non-programming) software, that are as powerful and valuable as Claude?