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 restoration cost explodes. Exception channel preserves the re-entry of non-default signals before they are compressed into silence. This paper argues that closed default is power, whereas editable default is governance. In this sense, SΔϕ-29 introduces the first minimal governance layer within the Sofience–Δϕ Formalism. This document belongs to the SΔϕ (Sofience–Δϕ Formalism) series. Series references - SΔϕ-28 — Default Power as Low-Cost Path Assignment: Minimal Conditions for Invisible Fixation after SΔϕ-27 (v1.0) - SΔϕ-27 — Low-Cost Convergence and Restoration Cost Explosion: Exception Compression as a Minimal Fixation Mechanism (v1.0) - SΔϕ-26 — Irreversibility as Restoration Cost Explosion: Minimal Fixation Conditions after Pre-detection (v1.0) Keywords Sofience–Δϕ; editable default; distributed authority; rollback window; exception channel; governance; default power; AI governance; editability; path fixation