Constitutional Constraint (Invariant)
A governance constraint that cannot be overridden by any actor within the system — analogous to a constitutional right that no law can violate.
Constitutional constraints (also called invariants) are the highest-level governance rules. They represent principles so fundamental that no decision, no matter how authoritative, can override them.
Constellation's own constitution includes invariants such as: - The Override Invariant: any override of a governance check must be visible and recorded - The Irreversibility Invariant: certain actions are marked as irreversible and require elevated scrutiny - The Silence Invariant: if the system cannot evaluate a constraint, it must fail closed (block) rather than fail open (allow) - The Symmetry Invariant: the rules that govern agents must also govern the governance system itself
Constitutional constraints create a governance floor — a minimum standard that cannot be weakened regardless of organisational pressure, emergency, or convenience. This is particularly important for AI governance, where the temptation to override safety constraints "just this once" can have cascading consequences.
How Constellation handles this
Constellation has 9 constitutional invariants that govern the platform itself. Organisations can define their own constitutional constraints — rules that no one in the organisation can override.