docs(consolidation): add the SVG checklist — the compact per-construct rung tracker

Author: softmarshmallow

docs/wg/consolidation/index.md

@@ -81,7 +81,9 @@ The charter is the only doc of the four that sequences work — and it
 records the *route*; the current *position* (active phase, landed PRs,
 taken decisions) is tracked on
 [gridaco/nothing#43](https://github.com/gridaco/nothing/issues/43),
-which a session reads before starting work. The other three docs are
+which a session reads before starting work. The per-construct position
+of the SVG engine of record is [the SVG checklist](./svg-checklist.md) —
+a compact box-per-construct tracker, ticked by each rung's docs commit. The other three docs are
 direction: stable in shape, expected to gain detail as decisions in the
 registry land.
 

docs/wg/consolidation/svg-checklist.md

@@ -0,0 +1,138 @@
+---
+title: "SVG checklist"
+description: "The compact rung tracker: the SVG surface by section, each item checked when a Chromium-gated rung lands it on the n0 path."
+tags:
+  - internal
+  - wg
+  - program
+  - consolidation
+format: md
+---
+
+# SVG checklist
+
+The compact tracker for the SVG engine of record (`websem → rframe → n0`).
+One line per construct; a checked box means a Chromium-gated rung landed it.
+An unchecked box is a departure the compiler already names (see
+[the refusal register](../../../fixtures/web-first/STATUS.md)) or surface not
+yet reached. This list tracks *position only*: semantics live in
+[the statement of record](../../../crates/n0_cli/README.md), rung history in
+[the D-N register](./svg-engine-of-record.md), and no score is computed from
+it (FLIP is unratified). A rung's docs commit ticks its rows.
+
+## Document & viewport
+
+- [x] standalone SVG entry (strict XML, UTF-8, no DTD)
+- [x] HTML entry (the document's first inline SVG)
+- [x] root `width`/`height`/auto sizing (WxH as initial viewport)
+- [x] `viewBox` (malformed refuses in both admissions)
+- [x] `preserveAspectRatio` (full grammar; malformed refuses)
+- [ ] percentage root sizing
+- [ ] nested `<svg>`
+- [ ] `<symbol>`
+- [ ] `<switch>`
+- [ ] `<foreignObject>`
+
+## Structure & references
+
+- [x] `<g>` / `<a>` containers
+- [x] `<defs>` (non-rendering, skipped by name)
+- [x] `<use>` same-document (first-id-wins table, forward refs, `xlink:href`, x/y translate, cycle/unresolved → correct nothing)
+- [ ] `<use>` under author CSS (shadow-scoped selector matching)
+- [ ] `<use>` external references
+- [ ] `<use>` of `<symbol>` / nested-`<svg>` targets
+
+## Geometry
+
+- [x] `<rect>`
+- [ ] `<rect>` `rx`/`ry` (rounded corners)
+- [x] `<circle>` / `<ellipse>` (auto and negative radii)
+- [x] `<line>` / `<polyline>` / `<polygon>` (points grammar; declared prefix divergence)
+- [x] `<path>`: `M L H V C S Q T Z` + `fill-rule`
+- [ ] `<path>`: `A` elliptical arc (needs the rframe conic amendment)
+- [ ] `pathLength`
+- [ ] CSS geometry properties (`x` `y` `cx` `cy` `r` `rx` `ry` `d` — Gecko-only at the Stylo pin)
+
+## Transforms
+
+- [x] `transform` attribute (whole SVG grammar; malformed list drops whole)
+- [x] CSS `transform` property + `-webkit-` alias (2D affine set)
+- [x] attribute↔CSS precedence (presentation-hint level)
+- [ ] `transform-origin` / `transform-box`
+- [ ] individual `rotate` / `translate` / `scale` properties
+- [ ] beyond-2D function family
+- [ ] root `<svg>` transform
+
+## Paint
+
+- [x] `fill`: named/hex/rgb(a) sRGB, `none`, `currentColor`, inherit
+- [x] `color` (the currentColor basis)
+- [x] `fill-opacity` / `stroke-opacity` / color alpha (float multiply, one quantize)
+- [ ] beyond-sRGB color spaces
+- [ ] `paint-order`
+- [ ] `context-fill` / `context-stroke`
+
+## Paint servers
+
+- [ ] `<linearGradient>`
+- [ ] `<radialGradient>`
+- [ ] `<stop>` (`offset`, `stop-color`, `stop-opacity`)
+- [ ] `gradientUnits` / `gradientTransform` / `spreadMethod`
+- [ ] `href` inheritance between gradients
+- [ ] `fill`/`stroke` `url(#…)` with fallback
+- [ ] `<pattern>`
+
+## Stroke
+
+- [x] solid stroke paint
+- [x] `stroke-width` (cascaded length; percentage against the viewport diagonal)
+- [x] `stroke-linecap` / `stroke-linejoin` / `stroke-miterlimit`
+- [ ] `stroke-dasharray` / `stroke-dashoffset`
+- [ ] `vector-effect`
+
+## Compositing & clipping
+
+- [ ] element `opacity` (needs the compositing scope)
+- [ ] `clip-path`
+- [ ] `mask`
+- [ ] `<filter>` / `filter`
+- [ ] `mix-blend-mode` / `isolation`
+
+## Disposition
+
+- [x] `display: none` (attribute and CSS; root ignores it, as Chromium does)
+- [x] `visibility` (descendant `visible` un-hides)
+- [ ] `display: contents`
+
+## CSS integration
+
+- [x] one Stylo cascade: `<style>` elements, `style` attributes, presentation hints (13 admitted)
+- [x] SVG-namespace stylesheet intake
+- [ ] shadow-scoped matching (author CSS + `<use>`)
+- [ ] longhands the pinned cascade cannot represent (`stop-color`, `marker-*`, `paint-order`, `d`, …)
+
+## Animation
+
+- [x] the time axis: Base / exact signed-nanosecond Sample, no ambient clock
+- [x] SMIL `animate` on rect `x` (the proving slice)
+- [ ] wider animated attributes (`y` `width` `height` `cx` `cy` `r` …)
+- [ ] `animateTransform`
+- [ ] CSS animations / transitions sampling
+- [ ] beyond-slice SMIL (`<set>`, href retargets)
+
+## Markers
+
+- [ ] `marker-start` / `marker-mid` / `marker-end`
+
+## Text
+
+- [ ] `<text>` (all of it)
+
+## Images & resources
+
+- [ ] `<image>`
+- [ ] external resources (self-contained input is the current contract)
+
+## Layout (HTML)
+
+- [ ] any HTML box layout (the surrounding page contributes nothing — pinned)