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Bullframe Theming

Community
marcop135
bullframe-theming

Theme Bullframe CSS with token overrides, dark or system builds, and a short project stylesheet. Use when branding colours or fonts, picking a dark or prefers-color-scheme build, or adding custom.css on top of one base build.

Overview

Publishermarcop135
Repositorybullframe.css
Skill namebullframe-theming
Stars
47
Forks
3
Bundled files
1
LicenseMIT
Links
  • 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 marcop135 on GitHub. Read the source before you install it.

Installation

Install the Bullframe Theming 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.
    https://github.com/marcop135/bullframe.css/tree/main/src/skills/bullframe-theming
  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/marcop135/bullframe.css.git /tmp/bullframe.css
mkdir -p .claude/skills
cp -r /tmp/bullframe.css/src/skills/bullframe-theming .claude/skills/bullframe-theming
Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Bullframe Theming 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 Bullframe Theming 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 Bullframe Theming 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.

Theming

Bullframe themes through CSS custom properties and build choice. Override --bf-* tokens after the stylesheet; do not fork the framework or invent theme classes.

When to use

Brand colour or type, a dark or system-prefers page, a short custom.css on top of one base build, or any task that changes appearance without new component CSS.

Inputs to gather

Brand primary colour (and a hover/focus sibling), optional font stacks, light / dark / system preference, and whether overrides are global (:root) or scoped to a class.

Rules

  1. Link exactly one base build. Dark is bullframe-dark.css; OS-follows is bullframe-system-default.css (or the classless equivalents). Do not stack two bases.
  2. Override tokens, not selectors. Set --bf-blue, --bf-blue-light, --bf-focus-ring-color, grays, and font stacks. Links, primary buttons and focus rings follow those tokens.
  3. Load project CSS after Bullframe. Prefer a <style> block or one custom.css link. Keep it to token overrides plus a few layout or type rules.
  4. Scope when the brand is not site-wide: put the overrides on a class such as .brand, not on every page.
  5. Replaced blues must clear WCAG AA contrast (4.5:1) on the page background. The shipped blues already do; a replacement has to match that bar.
  6. Do not add a theme-toggle script to get dark mode. Pick a -dark or -system-default build instead.
  7. Leave the HTML alone when tokens suffice. Prefer element styles and utilities over restyling .bf-btn selectors unless a token cannot reach the property.

Recipe

  1. Choose the build from bullframe-core (light, dark, or system; class-based or classless).
  2. Emit the page scaffold.
  3. Add a token block on :root or a brand scope class.
  4. If a few layout rules are needed, keep them in the same stylesheet and name them for the project, not as fake .bf-* classes.
  5. Check contrast on primary buttons, links and body text.

Example

examples/branded.html is a class-based page with a scoped brand class: teal primary tokens, serif headings, and no second Bullframe build.

Expected output

One HTML file that links exactly one Bullframe stylesheet, overrides only real --bf-* tokens from api.json, and needs no JavaScript for theming.

Failure modes

  • Linking bullframe.css and bullframe-dark.css together.
  • Inventing .bf-theme, .bf-theme-toggle or .bf-dark-mode.
  • Hard-coding #0f766e on buttons instead of setting --bf-blue.
  • Dropping contrast below AA when swapping the primary colour.
  • A large custom stylesheet that reimplements grid, spacing or type scales.

Do not

  • Do not write a theme toggle for OS dark mode; use a -system-default build.
  • Do not put token overrides in a stylesheet loaded before Bullframe.
  • Do not rebuild the framework from source for a colour change.
  • Do not set outline: none; tune --bf-focus-ring-* instead.

Canonical docs

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 Bullframe Theming AI skill do?

Theme Bullframe CSS with token overrides, dark or system builds, and a short project stylesheet. Use when branding colours or fonts, picking a dark or prefers-color-scheme build, or adding custom.css on top of one base build.

Why use Bullframe Theming on TypingMind?

Because you install it once and use it with any model. Bullframe Theming 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 Bullframe Theming in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/marcop135/bullframe.css/tree/main/src/skills/bullframe-theming. 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 Bullframe Theming?

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 Bullframe Theming?

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

Is the Bullframe Theming AI skill free?

Yes. It is published on GitHub by marcop135 under the MIT license. 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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