Declaring the whole matrix in --expect-change could accept a completely
foreign capture (different font stack, different machine): no undeclared
passed scenes would remain, and undeclared passed scenes are exactly what
proves the capture environment equals the accepted baseline's. The
realistic failure is fatigue, not malice — a mass framing change where the
author lists "everything that went red", accidentally sweeping in scenes
that diverged because of the environment.
Acceptance now requires a witness floor: after subtracting
--expect-change/--expect-new, at least min(10, 10% of baseline scenes)
undeclared scenes must match their accepted baselines BYTE-FOR-BYTE (a
sub-threshold 'passed' proves nothing about the environment — #351). A
truly total repaint passes only with an explicit
--no-witnesses --reason="…", and the reason is written into the baseline
manifest — a trace in the artifact and its git history, not just in the
shell history. A first-ever capture with no baselines requires no
witnesses: every frame there is declared in --expect-new anyway.
Issue: #355
User-Visible: no
Codex
7c285d25b7