BASE-BOARD AUTHORITY FAILS CLOSED ON SIZE-ONLY MAPPER RESULTS

The successor-DAG base-board boundary now has a generic authority layer for 2K, 4K and F8 images. Automatic size-only classifications are explicitly marked ambiguous rather than promoted as board identity; exact caller-supplied SHA-256 overrides resolve known images, duplicated flat content may resolve only when its effective mirror span is proven, and out-of-scope signatures, malformed overrides and size/profile conflicts return actionable unsupported…

Raw traces, ROM material, local paths, and personal data are not part of this public record.