FLX-4004: cumulative token spend exceeds the effective budget across calls

Family: governance/sovereignty (the 4000 band)

flux_engine.governance.gate.AIGate tracks tokens actually spent per (policyDigest, skillRef) across every call made through one instance. RFC-04's decide() enforces the budget per call; this is the budget enforced across calls -- a policy that allows N tokens does not allow the same allowed call an unlimited number of times.

Look it up offline

$ fluxsim explain FLX-4004

Every code is listed in the error index.