PAG Invariant Record
Kind: algorithm
Record: algorithms:pag-constraint-boundary
Canonical: Algorithms
Closure: Dependencies in load order
State every behavioral invariant as a record with four slots: the property in a form that could be false, the set it quantifies over, the parties it binds, and the objector, the check that would disagree if the property stopped holding or none as declared debt, so an unwatched invariant is visible rather than assumed.
Listed in Algorithm contracts, after PAG Explicit Control Flow and before PAG Semantic Operation.