Concept
Re-derive from the call, never the authorization
Every spend is evaluated from the real transaction being signed, not from a prior grant’s summary of it — the authorization describes, the call is the truth.
Pinned to
Tether WDK + wdk-policy-guard — the execution 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.