Hey, thanks for breaking it down. Your read of the three numbers is spot on. Agent/Tab really matches API/Total, Auto is a separate value, and clicking the bottom percentage row in the Agent window takes you to the usage summary where everything lines up. Ring shows the percent of context used for the specific model, like 272k on GPT 5.5, so you’re reading it correctly as a drift gauge.
On the hover over the ring not showing anything, in 3.11.13 they removed the always-visible context usage percent from the status bar. Now it’s tied to hover, and some users are reporting the same issue, for example here: Please bring back the always-visible context usage percentage. Can you share what version you’re on now in Cursor Settings > About, and does the tooltip show up at least sometimes. I want to confirm if this is from that change or a separate bug.
On the original request, separate bars by category like Agent vs Tab still makes sense as an idea, even with Usage Summary = Always. I can’t give an ETA yet, but the signal is clear. Let me know your version.