# Pre-delivery checklist

`build.sh` already checks the source rules, package invariants, missing glyphs and text-box
overflow. The math, semantics and rendered relationships below still require inspection.
Any mandatory violation means redraw, not patch.

## 1. Math (before looking at the picture)

- [ ] Every shape recomputed independently from the source formula or code.
- [ ] Block multiplication, broadcasting, reductions and sharding algebra verified.
- [ ] Axis identities that the figure asserts actually hold in the numbers drawn
      (`d = h·d_h`, `Σ_e n_e = T·k`, shards summing to the parent).

## 2. Semantics ledger

- [ ] Every discrete or overloaded symbol has one type, domain and range.
- [ ] Score, index and mask are three distinct objects in three distinct grammars.
- [ ] Producer-to-consumer chain closed: scores → indices → gather/mask → values.
- [ ] Shared selectors drawn once, with the reuse axis marked.

## 3. Geometry ledger

- [ ] Equal shapes have identical faces everywhere.
- [ ] `a×a` is square; every transpose physically swaps the face.
- [ ] Both occurrences of each contracted axis have the same edge length.
- [ ] Shards tile their parent exactly; concat reverses split; elisions use an ellipsis.

## 4. Full-size visual audit

Open the PNG at 100 %. Most of the first three items are automatic under the flow layout;
they still need looking at, because the cursor only guarantees that objects do not *push*
into each other, not that the figure reads correctly.

- [ ] Every lint exemption in the source is genuinely required and explained; deliverables
      normally have none.
- [ ] No forbidden intersection, tangency, clipping or occlusion — including stack offset
      sheets, brackets, arrow labels and the meaning box.
- [ ] Every connector's white label underlay covers only its own connector.
- [ ] No connector crosses a box that is not its endpoint.
- [ ] Symbols and shapes sit on two flat lanes per row; stage headings share a left rail.
- [ ] Every `\stgroup` outline names a composite the computation actually has, is captioned,
      and carries its members' role hue (`neutral` only for genuinely mixed members).
- [ ] Every `\stcallout` is an aside about its whole band, not a step: one per band, no
      taller than the band, and nothing in it that belongs in `\stmeaningbox`.
- [ ] Top zone compact (≤2 formula lines, no shape underbraces).
- [ ] Bottom box: one column, ≤3 rows, no overflow, no shrunken type.
- [ ] If requested, signature is outside the box, one line, accurate, unclipped and subdued.
- [ ] Structural support exact: known zeros unfilled, masks and diagonals exactly right.

## 5. Thumbnail audit

Open `*-thumb.png` (360 px).

- [ ] ≤4 active hue families per row plus gray; each role keeps one hue across stages.
- [ ] Base colors still muted, not saturated.
- [ ] Three visibly separated lightness levels where values vary; nothing is uniform pastel.
- [ ] Borders neutral, not tensor-colored.
- [ ] Dense texture reads as noise, not as stripes, checkerboard or a symmetric motif.
- [ ] The main structural claim of the figure is still legible at this size.

## 6. Delivery

- [ ] PNG preview shown.
- [ ] Short mechanism explanation in prose.
- [ ] `.tex` source and vector artifact (PDF/SVG) linked.
- [ ] Any degraded path stated explicitly — no CJK font, no `pdftocairo`, fallback renderer,
      inferred shapes or conventions.