Foundations settle the surfaces and the rules. Elements define what a state looks like. Components assemble them into the things an operator touches. Report design carries the same semantics across the white-label boundary.
Stated here because they govern every part. Their full treatment, with specimens, is in Foundations.
Signal Amber means something changed underneath you — regression, drift, live-differs, a stalled poll. It is not the severity scale. Severity is a measurement; regression is an alarm.
Every severity, status, staleness and confidence encoding carries a glyph or shape and a text label. Colour is the third channel, never the first. The tool that audits colour dependence cannot depend on colour.
A solid border means the value is written to the version record. A dashed border means advisory. The border tells you what has authority.
Status is drawn from an open set. Two reserved slots (needs-review, accepted-risk) are specified now so Theme E lands without a redesign.
Every change is recorded in the changelog, including each contrast result and the reason a token moved.