A.16:10 - SoTA-Echoing

Claim 1. Best-known incident-response, exploratory-design, and inquiry practice since 2015 treats advance, rollback, reopening, and retirement as explicit transitions rather than an irreversible maturity climb.

Local adoption. A.16 adopts explicit retreat and retirement, adapts them to typed publication forms and route conditions, and rejects the shortcut in which every change is narrated as improvement.

Claim 2. Current provenance and evaluation practice separates a lightweight transition note from a heavier history when branching, loss, or a history-dependent handoff affects later interpretation.

Local adoption. A.16 keeps the local note cheap, uses A.16.0 only at the stated threshold, and uses E.18 only for an independently selected TransformationFlowStructure. It rejects both mandatory trajectory wrappers and vague compression of important history.

Local stance. Admissible language-state movement needs typed moves, explicit identity and status claims, and retreat options. It needs neither a mandatory formality climb nor a single “authority” scale.