What you see
Numbers with context, not gameable numbers.
Three views ship on day one — rework rate, review burden, and the architecture · correctness · tests comment mix. You drill down along a fixed path (org → business unit → team → repo / product → change cohort → individual coaching view) so questions start with systems, not people — and every metric carries the sample size, time window, normalization group, and evidence links that make it worth a decision.
Four lenses, kept deliberately separate: author quality (rework, test gaps, architecture friction in PRs a person authors), reviewer quality (specificity and technical materiality of comments — tone is a secondary signal), collaboration (author/reviewer pairings and ownership boundaries), and system health (senior-review burden, AI verification debt, product ambiguity by team and product area).