Abdul WahabandClaude Fable 5.1 a82233736c Static engine: pixel-sample image backgrounds behind text ...

The analytic walk skips the contrast check when a url() image layer backs
text, so CLI scans, CI gates, and the hook had no answer for image-backed
text. Outside a browser there is no CORS and no canvas taint: the static
engine now reads the image itself, a local file next to the markup or a
base64 data URI, decoded with the pure-Rust image crate, sampled on a fixed
6x6 grid, and measured against the text. Static scans have no layout, so
the verdict is coarse by design: the finding fires only when the 90th
percentile of the grid fails. Uniform tint washes composite exactly,
varying scrims keep the skip, no-repeat icons count as decoration, and a
remote URL is never fetched.

The cascade carries backgroundRepeat / backgroundSize for the decoration
gate, stored beside the background shorthand expansion rather than inside
it, because the frozen vectors pin that expansion.

Fixture sampled-image-contrast.html with generated PNG, JPEG, WebP, alpha
and icon images; goldens recorded for the new cases, and the directory
sweeps re-recorded (only the fixture's eight findings moved), noted in
tests/oracle/DELTAS.md.

Refs #560.

AI assistance: Claude Code (Claude Fable 5.1), on maintainer instruction.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

2026-09-10 10:08:00 +05:00

..

src

Static engine: pixel-sample image backgrounds behind text

2026-09-10 10:08:00 +05:00

tests

The Rust engine: one binary replaces every script and the JS detector, fully open (#714)

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Cargo.toml

The Rust engine: one binary replaces every script and the JS detector, fully open (#714)

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