Favicon

---
name: favicon
description: "Generate favicons from a source image"
---

Generate a complete set of favicons from the source image at `$1` and update the project's HTML with the appropriate link tags.

## Prerequisites

First, verify ImageMagick v7+ is installed by running:
```bash
which magick
```

If not found, stop and instruct the user to install it:
- **macOS**: `brew install imagemagick`
- **Linux**: `sudo apt install imagemagick`

## Step 1: Validate Source Image

1. Verify the source image exists at the provided path: `$1`
2. Check the file extension is a supported format (PNG, JPG, JPEG, SVG, WEBP, GIF)
3. If the file doesn't exist or isn't a valid image format, report the error and stop

Note whether the source is an SVG file - if so, it will also be copied as `favicon.svg`.

## Step 2: Detect Project Type and Static Assets Directory

Detect the project type and determine where static assets should be placed. Check in this order:

| Framework | Detection | Static Assets Directory |
|-----------|-----------|------------------------|
| **Rails** | `config/routes.rb` exists | `public/` |
| **Next.js** | `next.config.*` exists | `public/` |
| **Gatsby** | `gatsby-config.*` exists | `static/` |
| **SvelteKit** | `svelte.config.*` exists | `static/` |
| **Astro** | `astro.config.*` exists | `public/` |
| **Hugo** | `hugo.toml` or `config.toml` with Hugo markers | `static/` |
| **Jekyll** | `_config.yml` with Jekyll markers | Root directory (same as `index.html`) |
| **Vite** | `vite.config.*` exists | `public/` |
| **Create React App** | `package.json` has `react-scripts` dependency | `public/` |
| **Vue CLI** | `vue.config.*` exists | `public/` |
| **Angular** | `angular.json` exists | `src/assets/` |
| **Eleventy** | `.eleventy.js` or `eleventy.config.*` exists | Check `_site` output or root |
| **Static HTML** | `index.html` in root | Same directory as `index.html` |

**Important**: If existing favicon files are found (e.g., `favicon.ico`, `apple-touch-icon.png`), use their location as the target directory regardless of framework detection.

Report the detected project type and the static assets directory that will be used.

**When in doubt, ask**: If you are not 100% confident about where static assets should be placed (e.g., ambiguous project structure, multiple potential locations, unfamiliar framework), use `AskUserQuestionTool` to confirm the target directory before proceeding. It's better to ask than to put files in the wrong place.