Favicon Generator logo

Favicon Generator

CommunityPopular
Dicklesworthstone
favicon-generator

Generate flat favicons from image prompts, then key out a magenta background and build PNG/ICO/WebP outputs with ImageMagick. Use when you need a reliable favicon workflow.

Overview

PublisherDicklesworthstone
Repositorypi_agent_rust
Skill namefavicon-generator
Stars
1.7K
Forks
206
Bundled files
1
Links
Skill sourceRepository
  • Markdown instructions

    A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.

  • Works with any LLM

    AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.

  • 1 bundled files

    Scripts, templates, and references the model can read while it works. Files are read-only and never executed.

  • Open source

    Published by Dicklesworthstone on GitHub. Read the source before you install it.

Installation

Install the Favicon Generator AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

1

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

  1. Open the app and go to Plugins → Skills.
  2. Choose "Install from GitHub".
  3. Paste the skill folder URL below and confirm.
  4. Enable the skill in any chat where you want it available.
Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.
2

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills
git clone --depth 1 https://github.com/Dicklesworthstone/pi_agent_rust.git /tmp/pi_agent_rust
mkdir -p .claude/skills
cp -r /tmp/pi_agent_rust/tests/ext_conformance/artifacts/agents-mikeastock/skills/favicon-generator .claude/skills/favicon-generator
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Favicon Generator in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Favicon Generator on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Favicon Generator is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

  • Loaded only when it is needed

    The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.

  • Switch models mid-chat

    Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Favicon Generator (magenta key workflow)

Create clean, flat favicons with a transparent background. Generate a base PNG on a solid magenta background, remove the magenta with ImageMagick, then export favicon.ico, PNG sizes, Apple touch icon, and WebP.

Prereqs

  • uv
  • magick (ImageMagick)
  • GEMINI_API_KEY set

Prompt template

Use a solid magenta background so it can be keyed out later. Keep the icon flat and simple so it reads at 16×16.

Favicon icon, 1:1 square, solid magenta #FF00FF background. Simple flat vector icon of: <subject>. Bold geometric shapes, solid fills, no gradients, no shadows. Centered, fills 75–85% of frame. Do not use magenta in the icon.

Generate the base image

Use the Nano Banana Pro skill to generate the PNG. Run from your project directory so outputs land where you need them.

Example (update the path for your agent):

  • Codex: ~/.codex/skills/nano-banana-pro/scripts/generate_image.py
  • Claude: ~/.claude/skills/nano-banana-pro/scripts/generate_image.py
  • Pi: ~/.pi/agent/skills/nano-banana-pro/scripts/generate_image.py
uv run <nanoBananaDir>/scripts/generate_image.py \
  --prompt "<your prompt>" \
  --filename "yyyy-mm-dd-hh-mm-ss-favicon.png" \
  --resolution 1K

Iterate at 1K, then re-run at 2K/4K only when the prompt is locked.

Convert to favicon outputs

Run the script from this skill:

bash {baseDir}/scripts/faviconize.sh <input-png> <output-base>

Outputs:

  • <output-base>-transparent.png
  • <output-base>-16.png, -32.png, -48.png
  • <output-base>.ico
  • <output-base>-apple-touch-icon.png (180×180)
  • <output-base>-192.png, <output-base>-512.png
  • <output-base>.webp (512×512)

Optional tuning

Set a different key color or fuzz if needed:

FAVICON_KEY_COLOR="#FF00FF" FAVICON_FUZZ="30%" bash {baseDir}/scripts/faviconize.sh input.png favicon

Update HTML + manifest

Add or update links in your HTML layout:

<link rel="icon" href="/favicon.ico" sizes="any">
<link rel="icon" type="image/png" sizes="32x32" href="/favicon-32.png">
<link rel="apple-touch-icon" href="/favicon-apple-touch-icon.png">
<link rel="manifest" href="/site.webmanifest">

Update site.webmanifest:

{
  "icons": [
    {"src": "/favicon-192.png", "sizes": "192x192", "type": "image/png"},
    {"src": "/favicon-512.png", "sizes": "512x512", "type": "image/png"},
    {"src": "/favicon.webp", "sizes": "512x512", "type": "image/webp"}
  ]
}

Common pitfalls

  • Magenta bleeding into edges means the generator used background gradients. Regenerate with a flat #FF00FF background.
  • Avoid magenta accents in the icon or they will be keyed out.
  • If the icon is too small in the tab, increase its size in the prompt and rerun the conversion.

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Favicon Generator AI skill do?

Generate flat favicons from image prompts, then key out a magenta background and build PNG/ICO/WebP outputs with ImageMagick. Use when you need a reliable favicon workflow.

Why use Favicon Generator on TypingMind?

Because you install it once and use it with any model. Favicon Generator is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Favicon Generator in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/Dicklesworthstone/pi_agent_rust/tree/main/tests/ext_conformance/artifacts/agents-mikeastock/skills/favicon-generator. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Favicon Generator?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Favicon Generator?

As many as you like. As long as a model supports skills, you can use Favicon Generator with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Favicon Generator AI skill free?

It is published on GitHub by Dicklesworthstone. Check the repository for licensing terms. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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