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Fix: do not flag Roboto in system font stacks (#671)

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Overused-font primary selection skipped platform UI faces, so a canonical system stack reported the Android fallback as the primary.

AI-assisted (Cursor).

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Abdul Wahab
2026-08-31 01:48:39 +05:00
co-authored by Cursor
parent b0594c72d1
commit 1828415f84
4 changed files with 82 additions and 17 deletions
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cli/engine/shared/constants.mjs
+18 -3
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@@ -56,13 +56,27 @@ function isBrandFontOnOwnDomain(font) {
return allowed.some(suffix => host === suffix || host.endsWith('.' + suffix));
}
const GENERIC_FONTS = new Set([
// Overused-font primary selection skips only CSS generics so a system stack
// keeps the system face as primary; GENERIC_FONTS still includes platform
// faces for design-system/serif resolution.
const CSS_GENERIC_FONTS = new Set([
'serif', 'sans-serif', 'monospace', 'cursive', 'fantasy',
'system-ui', 'ui-serif', 'ui-sans-serif', 'ui-monospace', 'ui-rounded',
'-apple-system', 'blinkmacsystemfont', 'segoe ui',
'inherit', 'initial', 'unset', 'revert',
]);
const GENERIC_FONTS = new Set([
...CSS_GENERIC_FONTS,
'system-ui', 'ui-serif', 'ui-sans-serif', 'ui-monospace', 'ui-rounded',
'-apple-system', 'blinkmacsystemfont', 'segoe ui',
]);
function primaryFontFace(fontFamily, skip = CSS_GENERIC_FONTS) {
return String(fontFamily || '')
.split(',')
.map(f => f.trim().replace(/^['"]|['"]$/g, '').toLowerCase())
.find(f => f && !skip.has(f)) || null;
}
// WCAG large text thresholds are defined in points: 18pt normal text and
// 14pt bold text. Browsers expose font-size in CSS pixels at 96px per inch.
const WCAG_LARGE_TEXT_PX = 18 * (96 / 72);
@@ -104,6 +118,7 @@ export {
BRAND_FONT_DOMAINS,
isBrandFontOnOwnDomain,
GENERIC_FONTS,
primaryFontFace,
WCAG_LARGE_TEXT_PX,
WCAG_LARGE_BOLD_TEXT_PX,
EM_DASH_FLOOR,