Author here. I vibe-coded this entire app with Claude Code, which is also how I ran into the problem in the first place. When I'm deep in a coding session, I typically have 2-3 Claude Code instances running across different terminal windows — one working on a feature, another writing tests, maybe a third refactoring something. As you get into flow, you start burning through your usage quota fast, and the only way to check how much is left is to type `/usage` inside a session. That means either interrupting an agent that's mid-task (and losing its train of thought), or opening yet another terminal to start a fresh session just to see a number. I kept getting surprised by hitting the limit at the worst possible moment. So I built this to scratch my own itch — one click in the menu bar, see the usage, get back to work.