A burn-rate alert policy editor built as a clock fusee: error budget is the mainspring barrel, a chain rides down a tapering cone as budget depletes, and alert sensitivity at any budget level is the cone's local radius, authored by dragging exactly 4 monotone control points, with a real multi-window rule table derived from the shape.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/fusee-cone.json"