A stacked map of the assembled prompt — system, tools, files, memory and history as proportional slices with per-entry token costs, an expandable breakdown that never hides what it didn't itemise, a reply-headroom band that warns before the answer stops fitting, and a what-if preview of every evictable entry.
npx shadcn@latest add @zyeon/context-inspectorZyeon UI limits how often it can be asked, and Context Inspector hasn't had its turn. Its source will show here once it has.