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A11Y-ALTDeterministic
Images carry alternative text
What the source requires
Non-text content has a text alternative.
Why this is hard to satisfy
Bulk-uploaded galleries — before-and-after sets especially — are published without any alternative text at all.
What we do about it
Presence is checked deterministically. Quality of wording is advisory and labelled as such, because meaning is not machine-checkable.
In build · phase one
What this tier means
Same input, same verdict, every time — no model in the loop. This is the only tier where the word “verified” is literally true.