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cccskills
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favicon-gen

Generate custom favicons from logos, text, or brand colours. Produces favicon.svg, favicon.ico, apple-touch-icon.png, icon-192/512.png, and web manifest. Use whenever the user wants a favicon, mentions replacing a CMS default favicon, converting a logo into a favicon, creating branded initials icons, or troubleshooting favicon not displaying / iOS black square / missing manifest.

jezweb/claude-skills
インストール方法を見る

含まれるファイル（9）

  • SKILL.md4.1 KB
  • assets/favicon-svg-circle.svg387 B
  • assets/favicon-svg-shield.svg491 B
  • assets/favicon-svg-square.svg453 B
  • assets/manifest.webmanifest509 B
  • references/extraction-methods.md12.2 KB
  • references/format-guide.md13.9 KB
  • references/monogram-patterns.md16.4 KB
  • references/shape-templates.md14.5 KB

SKILL.md（原文）

インストールする前に、エージェントに与えられる指示の中身を確認できます。

Favicon Generator

Generate a complete favicon package from a logo, initials, or brand colours. Produces all required formats and HTML integration code.

Workflow

Step 1: Choose Your Approach

Have a logo with an icon element?
 YES -> Extract icon from logo
 NO  -> Have text/initials?
         YES -> Create monogram favicon
         NO  -> Use branded shape

Step 2: Create Source SVG

Extracted icon — copy icon paths from logo, centre in 32x32 viewBox, simplify for small sizes.

Monogram — use a template from assets/:

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 32 32">
  <circle cx="16" cy="16" r="16" fill="#0066cc"/>
  <text x="16" y="21" font-size="16" font-weight="bold"
        text-anchor="middle" fill="#ffffff" font-family="sans-serif">AC</text>
</svg>

Branded shape — circle (universal), rounded square (modern), shield (security), hexagon (tech).

SVG templates available in assets/ directory.

Step 3: Generate All Formats

Requires ImageMagick (convert command). Install if needed: brew install imagemagick (macOS) or apt install imagemagick (Linux).

# ICO (16x16 + 32x32)
convert favicon.svg -define icon:auto-resize=16,32 favicon.ico

# Apple Touch Icon (180x180, SOLID background — transparent = black on iOS)
convert favicon.svg -resize 180x180 -background "#0066cc" -alpha remove apple-touch-icon.png

# Android/PWA icons
convert favicon.svg -resize 192x192 icon-192.png
convert favicon.svg -resize 512x512 icon-512.png

No ImageMagick? Use https://favicon.io to convert from the SVG instead.

Step 4: Create Web Manifest

Copy and customise assets/manifest.webmanifest:

{
  "name": "Your Business Name",
  "short_name": "Business",
  "icons": [
    { "src": "/icon-192.png", "sizes": "192x192", "type": "image/png" },
    { "src": "/icon-512.png", "sizes": "512x512", "type": "image/png" }
  ],
  "theme_color": "#0066cc",
  "background_color": "#ffffff",
  "display": "standalone"
}

Step 5: Add HTML Tags

<link rel="icon" type="image/svg+xml" href="/favicon.svg">
<link rel="icon" type="image/x-icon" href="/favicon.ico">
<link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
<link rel="manifest" href="/site.webmanifest">
<meta name="theme-color" content="#0066cc">

Place all files in site root (/public/ in Vite/React).

Critical Rules

  • Always generate ALL formats — SVG, ICO, apple-touch-icon, 192, 512, manifest
  • iOS icons MUST have solid backgrounds — transparent = black square
  • Always use bold font weight for monogram text (regular disappears at 16x16)
  • Test at 16x16 — if it's not legible, simplify
  • Never launch with CMS defaults (WordPress "W", etc.)

Format Quick Reference

FormatSizeTransparencyPurpose
favicon.svgVectorYesModern browsers
favicon.ico16+32YesLegacy browsers
apple-touch-icon.png180x180NoiOS home screen
icon-192.png192x192YesAndroid
icon-512.png512x512YesPWA

Asset Files

  • assets/favicon-svg-circle.svg — Circle monogram template
  • assets/favicon-svg-square.svg — Rounded square template
  • assets/favicon-svg-shield.svg — Shield template
  • assets/manifest.webmanifest — Web manifest template

Reference Files

  • references/format-guide.md — Complete format specifications
  • references/extraction-methods.md — Logo icon extraction steps
  • references/monogram-patterns.md — Advanced monogram design
  • references/shape-templates.md — Industry-specific shapes with SVG code

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