Concept
Amounts are whole minor units
Every figure is a whole number of minor units; floats, strings, negatives and bare numbers are refused, because rounding someone’s money is not a thing a policy may do quietly.
Pinned to
pay-policy/1 — the commerce layerThe canonical source this concept is taught from. If it moves, the lesson is regenerated — teaching is pinned to code, not retyped.
On the frontier
No course teaches this concept yet — it is a named gap on the content graph, not a hole nobody sees. A gap is the roadmap, not an embarrassment: the count only falls by teaching.