[lunaprompts_hn]

The framing of "bad vs none" is interesting but I think the more useful question is: what makes an Agent.md actually good?

From what I have seen, the ones that work well are specific about failure modes rather than capabilities. Instead of "you can search the web", something like "when you search, prefer recent sources and flag anything older than 6 months as potentially outdated."

Constraints and edge cases matter more than listing capabilities. Any agent will try to be helpful. The ones that go wrong usually do so at boundaries the original author didn't think about.