Irreversibility Budgets: What May Write Widely and What Must Remain Reversible

Status. Methodological and structural note within a hypothetical framework. This text does not prescribe policy and does not claim that current AI practice already respects or violates an “irreversibility budget.” It introduces the notion of an irreversibility budget as a way to make the accumulation of durable recordings in human–AI contours visible and, in principle, governable.