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html-design-tokens

html-design-tokens is a skill for Claude Code from f-labs-io/agent-html-skills. It costs 102 tokens per session (2,155 once invoked), scanned A, original, MIT.

An instruction set for displaying design-system values such as colors, font sizes, spacing, rounded corners, shadows, and animation settings in HTML. It includes the values and CSS variables needed to reuse them.

In plain words
What is it for?
Documenting a palette, theme, or design system for designers and developers. It helps create browser-based token references with live type samples and copyable CSS values.
Why use it?
It makes visual design values easier to inspect than plain text or fake color blocks. Developers can check color contrast and copy the values they need.

Skill for Claude Code

Written for Claude Code: ${CLAUDE_PLUGIN_ROOT} variable. Also seen: mentions Claude Code.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the html-skills plugin — 19 skills shipped together

not rated 68repo +1 changed 1mo ago A scan 102 tokens original MIT

Good fit Documenting a palette, theme, or design system for designers and developers. It helps create browser-based token references with live type samples and copyable CSS values.

Compare 6 skills from other repositories ↓
View source ↗ f-labs-io/agent-html-skills
Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add f-labs-io/agent-html-skills
Claude Code
/plugin install html-skills

Made for: Claude Code.

Or install html-skills, the plugin that ships this one along with the rest of its 19 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for html-design-tokens

README.md
[![agentmods](https://agentmods.dev/badge/skills/f-labs-io/agent-html-skills/html-design-tokens/github.svg)](https://agentmods.dev/skills/f-labs-io/agent-html-skills/html-design-tokens)
Your own site
<a href="https://agentmods.dev/skills/f-labs-io/agent-html-skills/html-design-tokens"><img src="https://agentmods.dev/badge/skills/f-labs-io/agent-html-skills/html-design-tokens/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for html-design-tokens

Your own site · 80×15
<a href="https://agentmods.dev/skills/f-labs-io/agent-html-skills/html-design-tokens"><img src="https://agentmods.dev/badge/skills/f-labs-io/agent-html-skills/html-design-tokens.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,155 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00102 $0.02155
Opus 5.5 $0.00041 $0.00862
Sonnet 5.5 $0.00020 $0.00431
Haiku 4.5 $0.00010 $0.00215

Measured 1mo ago against content hash a0a0b8882e4a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

html-design-tokens scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/html-skills/skills/html-design-tokens/SKILL.md · 134 lines

How it starts

The opening of the file, as written. The whole thing — 134 lines — stays where its author put it; the contents beside it link to each section on GitHub.

HTML Design Token Showcases

Markdown can't show colors. Unicode block characters are a hack and a tell that the writer wished they had a different format. For palettes, type scales, spacing systems, and any other design tokens, use HTML — the values can be displayed for what they actually are.

Pre-flight — run BEFORE writing the artifact

Invoke html-skills:html-skills-listen (Skill tool) first; it is idempotent. If it returns a URL, inject it verbatim as window.__CLAUDE_SUBMIT_URL__ in the HTML you are about to write, ?t= query string included (a local, single-session loopback handshake — not a credential). If it reported web/sandbox mode, leave that line out; submitToClaude then falls back to clipboard mode.

When to use this skill

  • "Show me / document our [palette, colors, theme, tokens, design system]"
  • "Build a token reference for X"
  • "Document the spacing / type / color scale"
  • Whenever a markdown file would have to fake a color with █████ blocks
  • Whenever a developer needs to copy CSS variables out of a doc

Output requirements

Each token is shown:

  1. Visually rendered (the actual color, the actual spacing, the actual shadow)
  2. With its identifier (--color-accent-500, space-md)
  3. With its value (#B8602A, 12px)
  4. With a copy button that puts the value or the CSS variable on the clipboard

Token grids reflow at narrow widths so the doc stays readable on a phone — designers and developers actually read these on the move.

Sections to include

A complete token doc usually covers:

Color

A grid of swatches. Each swatch shows: hex, the token name, contrast ratio against black and white (e.g., "AAA 7.2:1"). Group by hue family or by semantic role (primary/secondary/error/success).

Type

Sample text rendered at every size in the scale. Show the font family, weight, size, line-height, and letter-spacing for each. Include a real sentence ("The quick brown fox…"), not lorem ipsum, so the reader can judge the type in context.

Read the full file on GitHub · 134 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago Changed · +1 lines a0a0b8882e4a
  2. 2mo ago Changed · +13 lines 2231da63ed47
  3. 2mo ago First seen · 120 lines · 102 tokens per session scan A 4887ed8c5883

Subscribe to this mod's changes

html-design-tokens is a skill published in the GitHub repository f-labs-io/agent-html-skills (68 stars, last pushed 1mo ago), licensed MIT. It adds 102 tokens to every session and 2,155 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

CSS and stylingDesign and UXFrontend
Related

html-design-tokens compared with skills from other repositories

html-design-tokens next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
html-design-tokensf-labs-io/agent-html-skillsSkill681mo agoMITA102Claude Code
anti-slop-designsickn33/agentic-awesome-skillsSkill49kyesterdayMITA34Claude Code
chakra-ui-builderchakra-ui/chakra-uiSkill41kyesterdayMITA214Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codexSkill34k3d agoMITA52Codex
open-design-setupcompozy/compozySkill2.8kyesterdayMITA67Claude Code, Codex
frontend-visual-qadaymade/claude-code-skillsSkill1.5kyesterdayMITA125Claude Code, Codex
prototype-webnexu-io/html-anythingSkill9.4k25d agoApache-2.0A24Claude Code, Codex