Font Blacklist Applied
Detects blacklisted default font-families (Arial, Helvetica, Times New Roman, Comic Sans, Papyrus, Courier New) used as PRIMARY font, and detects sites that load no custom fonts at all (signaling lack of typographic care…
$ aoe install @community/check-font-blacklist-appliedProjection
Always in _index.xml · the agent never has to ask for this.
FontBlacklistApplied [check] v1.0.0
Detects blacklisted default font-families (Arial, Helvetica, Times New Roman, Comic Sans, Papyrus, Courier New) used as PRIMARY font, and detects sites that load no custom fonts at all (signaling lack of typographic care).
Loaded when retrieval picks the atom as adjacent / supporting.
FontBlacklistApplied [check] v1.0.0
Detects blacklisted default font-families (Arial, Helvetica, Times New Roman, Comic Sans, Papyrus, Courier New) used as PRIMARY font, and detects sites that load no custom fonts at all (signaling lack of typographic care).
signature: (css: string, html: string, context?: object) -> CheckResult predicate: // Blacklisted font-family stacks (signal "AI default" aesthetic): BLACKLIST = [ 'Comic Sans MS', 'Papyrus', 'Times New Roman', // raw — system Times is fine, Times New Roman explicit is dated 'Arial', // when used alone without sans-serif fallback chain 'Helvetica', // when used alone — modern stacks use Inter/SF 'Courier New', ] // Also blacklist: any -apple-system-only stack with no custom font (signals "no design taste") fontDecls = parseCSS(css).filter(d => d.property === 'font-family' || d.property === 'font') for d in fontDecls: stack = parseFontStack(d.value) for f in stack.fonts: for bad in BLACKLIST: if f.toLowerCase() === bad.toLowerCase(): // Check if it's only the fallback (last in stack) — that's allowed if stack.fonts.indexOf(f) === 0: yield { selector: d.selector, value: d.value, fail: 'blacklisted-primary-font', font: f }
// Detect "no @font-face declared anywhere" → site relies on system defaults only hasFontFace = /@font-face\s*{/.test(css) hasGoogleFonts = /fonts.googleapis.com|fonts.bunny.net/.test(html) hasLocalFonts = /url(['"]?[^)]*.(woff2?|ttf|otf)/.test(css) if !hasFontFace && !hasGoogleFonts && !hasLocalFonts: yield { fail: 'no-custom-font-loaded', remedy: 'Load a custom display + body font pair' }
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Validates
@community/rule-font-blacklist-applied
Severity
medium
Failure Message Template
Selector '{selector}' uses blacklisted primary font '{font}' (declaration: {value}). Replace with a custom display/body pair (e.g. Inter + Source Serif, or Geist + Newsreader).
Evaluation Method
automated
Tools
- regex
- postcss
- @anthropic/claude-code
False Positive Rate
low
Loaded when retrieval picks the atom as a focal / direct hit.
FontBlacklistApplied [check] v1.0.0
Detects blacklisted default font-families (Arial, Helvetica, Times New Roman, Comic Sans, Papyrus, Courier New) used as PRIMARY font, and detects sites that load no custom fonts at all (signaling lack of typographic care).
signature: (css: string, html: string, context?: object) -> CheckResult predicate: // Blacklisted font-family stacks (signal "AI default" aesthetic): BLACKLIST = [ 'Comic Sans MS', 'Papyrus', 'Times New Roman', // raw — system Times is fine, Times New Roman explicit is dated 'Arial', // when used alone without sans-serif fallback chain 'Helvetica', // when used alone — modern stacks use Inter/SF 'Courier New', ] // Also blacklist: any -apple-system-only stack with no custom font (signals "no design taste") fontDecls = parseCSS(css).filter(d => d.property === 'font-family' || d.property === 'font') for d in fontDecls: stack = parseFontStack(d.value) for f in stack.fonts: for bad in BLACKLIST: if f.toLowerCase() === bad.toLowerCase(): // Check if it's only the fallback (last in stack) — that's allowed if stack.fonts.indexOf(f) === 0: yield { selector: d.selector, value: d.value, fail: 'blacklisted-primary-font', font: f }
// Detect "no @font-face declared anywhere" → site relies on system defaults only hasFontFace = /@font-face\s*{/.test(css) hasGoogleFonts = /fonts.googleapis.com|fonts.bunny.net/.test(html) hasLocalFonts = /url(['"]?[^)]*.(woff2?|ttf|otf)/.test(css) if !hasFontFace && !hasGoogleFonts && !hasLocalFonts: yield { fail: 'no-custom-font-loaded', remedy: 'Load a custom display + body font pair' }
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Validates
@community/rule-font-blacklist-applied
Severity
medium
Failure Message Template
Selector '{selector}' uses blacklisted primary font '{font}' (declaration: {value}). Replace with a custom display/body pair (e.g. Inter + Source Serif, or Geist + Newsreader).
Evaluation Method
automated
Tools
- regex
- postcss
- @anthropic/claude-code
False Positive Rate
low
Relations
related: [@community/rule-font-blacklist-applied]
Meta
- License: Apache-2.0
- License Provenance: package-authorship-claim
Validates
@community/rule-font-blacklist-applied
Severity
medium
Failure Message Template
Selector '{selector}' uses blacklisted primary font '{font}' (declaration: {value}). Replace with a custom display/body pair (e.g. Inter + Source Serif, or Geist + Newsreader).
Evaluation Method
automated
Tools
- regex
- postcss
- @anthropic/claude-code
False Positive Rate
low
Source
aoe-engine/examples/frontend-design/primes/compiled/@community/check-font-blacklist-applied/atom.yaml