SΔϕ-29 — Editable Default: Minimal Conditions for Distributed Authority, Rollback, and Exception Re-entry after SΔϕ-28 (v1.0)

This paper extends SΔϕ-28 by asking under what conditions a default remains governable rather than absolute. If default power fixes paths by making one continuation the cheapest, then governance must be redefined as the capacity to keep defaults structurally editable. The central claim of this paper is that a default remains legitimate only when four minimal conditions are preserved: editable default, distributed authority, rollback window, and exception channel. Editable default names the revisability of the dominant path itself. Distributed authority prevents revision from collapsing into a single point of control. Rollback window marks the interval in which reversal remains operationally feasible before…