The budget panel said $189 left. The console said $291. Both numbers were wrong.
Our little status pane said $10.80 spent of $200.00, $189.20 left. The provider's console, open in the next tab, said $291.77 remaining. Same account, same day. Both numbers were wrong, and for different reasons. This is the write-up of finding the number that is actually true, and of the one-line-shaped design change that stops the pane from ever mixing two accountings again. It's a plugin for the Claude Code agent harness: a mod that registers a UI pane and redraws it on a timer. It shows the…