Design operational analytics dashboards + observability for forecast / planner / guaranteed-delivery systems — the surfaces an SRE, analyst, or exec uses to root-cause underdelivery, decompose forecast error, watch pacing health, and read delivery risk. Three modes: DESIGN (design doc), PROTOTYPE (runnable Vite + React + TS app), AUDIT (critique an existing dashboard); loads only the touched concern. Decision-first not chart-first; explainability over decoration; drill-down over breadth. Rejects vanity metrics, pie-for-non-part-to-whole, uncalibrated bands, dead-end overviews, alert fatigue, unvirtualized tables. Trigger on: "pacing dashboard", "planner debugging UI", "wh…
