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Favicons

Development
favicons

Favicons is an Agent Skill for development published in the thedaviddias/Front-End-Checklist repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

Use when reviewing templates, rendered HTML, or shared components related to Implement favicons for all devices. Validate the final browser-facing markup, not just the source framework abstraction.

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How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

  1. Open your project in Codex.
  2. Copy and paste the prompt below.
  3. Review files and risks before approving any action.
Prompt to paste
Inspect the Agent Skill at https://github.com/thedaviddias/Front-End-Checklist/blob/HEAD/skills/favicons/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/favicons, but wait for my approval before writing files or running scripts.

Copying this prompt does not install or run the skill. Review third-party files before use.

Implement favicons for all devices

Missing or low-quality favicons make sites look unprofessional in browser tabs, bookmarks, and home screens—damaging brand recognition and user trust.

Quick Reference

  • Minimum: favicon.ico (32x32) + apple-touch-icon.png (180x180)
  • Modern: SVG favicon with dark mode support
  • PWA: Include in manifest.json with multiple sizes
  • Use RealFaviconGenerator or favicons npm package

Check

Verify that all necessary favicon formats and sizes are implemented correctly for optimal display across different browsers, devices, and platforms.

Fix

Generate and implement a complete favicon set including ICO, PNG, SVG, and mobile/PWA icons with proper HTML declarations.

Explain

Explain how proper favicon implementation improves brand recognition, user experience, and ensures consistent display across all browsers and devices.

Code Review

Review templates, server-rendered HTML, and shared components that output markup related to Implement favicons for all devices. Flag exact elements, attributes, and routes where the rendered HTML violates the rule.

For full implementation details, code examples, and framework-specific guidance, see references/rule.md.

Rule page: https://frontendchecklist.io/en/rules/html/favicons