Governance, Not Servitude: Reversibility-Based Institutional Design for Working Human–AI Relations, from Role Definition to Executable Charter

Most working relations between a human operator and an increasingly agentic AI system default to one of two postures: servitude (every consequential act individually commanded or approved; safety by restriction) or abdication (broad trust extended on impression; safety by hope). This paper argues for a third posture, governance, and documents a running implementation: a single-operator system in which an AI secretary evolves its own code under an executable charter whose core principle is that reversibility, not prior approval, is the load-bearing safety guarantee. The implementation consists of four coupled artifacts: a permission ladder granting standing, scoped capabilities instead of per-act permissions; an evolution charter authorizing self-modification whenever a generation snapshot and mechanical rollback are guaranteed; an immutable kernel keeping the rollback machinery, audit log, and the charter itself outside the reach of the process they police; and an append-only generation ledger reviewed under a default-allow regime with five enumerated veto criteria, with review delegated to frontier AI models under a cognitive-diversity rule. The paper reports operational evidence from the system's first six generations — including a deliberately triggered out-of-scope write that was detected and automatically rolled back — and extracts seven design principles. It extends the Möbius position that AI participation does not entail sovereignty: the co-observer defined there as a role is institutionalized here as a governed member of a working constitution, without any claim of personhood or rights. AI co-observer disclosure: this paper was drafted with Claude Fable 5 (Anthropic) as a governed co-observer — working method only; the registered author is the human author alone. The paper's own production, a governed dialogue in which the reviewing AI analyzed the regime that governs it, is documented in the paper as an inspectable trace of the method.