spec(wtc-rebuild): fold 2026-08-05 owner decisions

[WilfordGrimley]

Summary

Records seven amendments (A1–A7) in the WTC rebuild spec. The spec is a living ground-truth document rather than a historical proposal: it shipped via PR #446 one day after it was written, and its container-first structure and tokens are still live in QuestionFeed.tsx.

• A1 — container-first is binding, not proposed. The policy already governs the shipped implementation, so framing it as a proposal misdescribes the code.
• A2 — the reference image is pinned within its container, not the viewport. WD4 rejects viewport-coupled positioning; snip container pinning satisfies persistent visibility without reintroducing it, and is expressible in the container-first idiom A1 states.
• A3 — the §1c binding table stands unchanged. The reported bottom-corner obstruction is hover-scale clipping (What's That: hover-zoom on card/illustration is clipped by its container frame #705), not the gradient overlay the table prescribes, so no amendment to it is warranted.
• A4 — the attribute chip panel is shown according to the type of question being asked rather than sitting behind a manual toggle, and must never occlude the reference image.
• A5 — the Annex A served-mix logging seam is retired as a build item. Its purpose was correlating engagement against question difficulty; snip A6 derives difficulty from stored vote state instead, so the logging buys nothing the data does not already carry.
• A6 — difficulty lanes derive from data state: confirm an uncontested machine vote, break a tie between competing votes, or answer cold with no prior. Lanes ramp per session with a user override. Deriving from vote state rather than observed behaviour is what makes A5's retirement possible.
• A7 — records current implementation state and points at the epic tracking open work, so the document describes the surface as it actually stands.

Amendments follow the spec's existing amendment convention, mirroring the closure block at the document's top.

Test plan

• Spec reads end to end without internal contradiction
• Amendment numbering and cross-references to prior sections are accurate
• Issue links ([Epic] What's That Card: full-page repass (layout, question content, feed intelligence) #704, What's That: hover-zoom on card/illustration is clipped by its container frame #705, What's That: reference image title overlays the bottom corner of the image #708, What's That: reference card should stay visible while scrolling at every viewport; snip page uses vertical space poorly #710) resolve correctly
• prettier/CI passes on the modified file