The first time my AI bill scared me into building TokenBar

A few months ago I opened my AI bill and did the dumb double-take every solo dev knows. Not because I had a huge team. Because the cost was invisible while I was building. That was the whole problem. I could feel the products moving, but I could not feel what each conversation, prompt, or workflow was costing me in real time. So I built TokenBar. It is a tiny macOS menu bar app that makes LLM spend visible while you work. Not a dashboard you check later. Not a spreadsheet you avoid. Just con...