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 or surface not yet reached. To see what is done, open the visual corpus — the generated status view renders every baked cell as a thumbnail gallery (each image is the committed Chromium oracle, which byte-exactness makes the engine's own render too) with the refusal register beneath it. This list tracks position only: semantics live in the statement of record, rung history in the D-N register, and no score is computed from it (FLIP is unratified). A rung's docs commit ticks its rows.

Document & viewport

• standalone SVG entry (strict XML, UTF-8, no DTD)
• HTML entry (the document's first inline SVG)
• root width/height/auto sizing (WxH as initial viewport)
• viewBox (malformed refuses in both admissions)
• preserveAspectRatio (full grammar; malformed refuses)
• percentage root sizing
• nested <svg>
• <symbol>
• <switch>
• <foreignObject>

Structure & references

• <g> / <a> containers
• <defs> (non-rendering, skipped by name)
• <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

• <rect>
• <rect> rx/ry (rounded corners)
• <circle> / <ellipse> (auto and negative radii)
• <line> / <polyline> / <polygon> (points grammar; declared prefix divergence)
• <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

• transform attribute (whole SVG grammar; malformed list drops whole)
• CSS transform property + -webkit- alias (2D affine set)
• attribute↔CSS precedence (presentation-hint level)
• transform-origin / transform-box
• individual rotate / translate / scale properties
• beyond-2D function family
• root <svg> transform

Paint

• fill: named/hex/rgb(a) sRGB, none, currentColor, inherit
• color (the currentColor basis)
• fill-opacity / stroke-opacity / color alpha (float multiply, one quantize)
• beyond-sRGB color spaces
• paint-order
• context-fill / context-stroke

Paint servers

• <linearGradient>
• <radialGradient> (concentric; focal fx/fy/fr refuse by name)
• <stop> (offset, stop-color, stop-opacity — attribute reads; author CSS on stops refuses)
• gradientUnits / gradientTransform / spreadMethod
• href inheritance between gradients (cycles → correct nothing)
• fill/stroke url(#…) with fallback
• <pattern>

Stroke

• solid stroke paint
• stroke-width (cascaded length; percentage against the viewport diagonal)
• 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

• display: none (attribute and CSS; root ignores it, as Chromium does)
• visibility (descendant visible un-hides)
• display: contents

CSS integration

• one Stylo cascade: <style> elements, style attributes, presentation hints (13 admitted)
• SVG-namespace stylesheet intake
• shadow-scoped matching (author CSS + <use>)
• longhands the pinned cascade cannot represent (stop-color, marker-*, paint-order, d, …)

Animation

• the time axis: Base / exact signed-nanosecond Sample, no ambient clock
• 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)