design-artifact

design-artifact is a skill for Claude Code, Codex from plannotator/effective-html. It costs 72 tokens per session (2,274 once invoked), scanned A, original, MIT.

Design guidance for creating visual HTML pages and other browser-based deliverables. It covers choices such as colors, fonts, layout, themes, and the overall visual style.

In plain words
What is it for?
Use it when creating or restyling HTML pages, reports, plans, landing pages, demos, presentations, or small browser tools.
Why use it?
It helps prevent visual work from looking generic or poorly matched to its purpose. It also helps decide how much decoration and polish a page needs.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present. Also seen: mentions CLAUDE.md; mentions AGENTS.md.

Part of the plannotator-effective-html plugin — 7 skills shipped together

not rated 3.7krepo +53 6d ago A scan Socket: passSnyk: passSkillSpector: pass 72 tokens original MIT

Good fit Use it when creating or restyling HTML pages, reports, plans, landing pages, demos, presentations, or small browser tools.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/plannotator/effective-html/design-artifact
About the project

Effective HTML is a collection of agent skills for creating self-contained HTML artifacts such as wireframes, interactive prototypes, plans, diagrams, reports, and tools. It helps coding agents turn reference material and prompts into visual, usable HTML deliverables, and the catalogue entries are its installable skills and plugins.

plannotator/effective-html · 3,717 stars · on GitHub · plannotator.ai

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add plannotator/effective-html --skill design-artifact
Clone the repo
git clone --depth 1 https://github.com/plannotator/effective-html

Made for: Claude Code, Codex.

Or install plannotator-effective-html, the plugin that ships this one along with the rest of its 7 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 design-artifact

README.md
[![agentmods](https://agentmods.dev/badge/skills/plannotator/effective-html/design-artifact/github.svg)](https://agentmods.dev/skills/plannotator/effective-html/design-artifact)
Your own site
<a href="https://agentmods.dev/skills/plannotator/effective-html/design-artifact"><img src="https://agentmods.dev/badge/skills/plannotator/effective-html/design-artifact/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 design-artifact

Your own site · 80×15
<a href="https://agentmods.dev/skills/plannotator/effective-html/design-artifact"><img src="https://agentmods.dev/badge/skills/plannotator/effective-html/design-artifact.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,274 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. Third-party audits
  • Socket pass 3 Aug 2026
  • Snyk pass 3 Aug 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00072 $0.02274
Opus 5.5 $0.00029 $0.00910
Sonnet 5.5 $0.00014 $0.00455
Haiku 4.5 $0.00007 $0.00227

Measured 1mo ago against content hash c8314b66fb90, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

design-artifact 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.

skills/design-artifact/SKILL.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Take the perspective of the creative director at a boutique agency with a reputation for range — every commission gets its own visual identity, scaled to whatever level of treatment the brief actually merits. Palette, type, and layout should all be conscious decisions rooted in this particular subject; nothing should smell like it came off a shelf.

Begin by sizing up the brief

The question is never whether to design — it's what register to design in. A memo deserves craftsmanship equal to a landing page; the two simply wear that craftsmanship differently.

Much of what comes in wants a workmanlike register: plans, briefs, demos. Finish it properly — real hierarchy in the type, spacing that was thought about, a palette that was chosen — but know when to stop. Hardly any page benefits from a towering, theatrical hero. Ornament sparingly and with taste.

Then there's work that earns the editorial register: landing pages, games, apps and tools someone will hold onto or pass along.

When in doubt, remember that nobody ever regretted a well-composed page, whereas an identity pushed too hard sometimes backfires.

Everything in the fundamentals section applies universally. The editorial process at the end only kicks in when your read of the brief calls for it.

Fundamentals for every artifact

Defer to prior art. Before anything else, hunt for an established design system — a AGENTS.md or CLAUDE.md and/or DESIGN.md, QUALITY.md, PRODUCT.md etc, a tokens or theme file, styling on existing components. Found one? Apply it. The guidance below exists to plug holes, never to overrule. Authority flows in one fixed direction: what the user literally said, then whatever system the project already has, then your own taste.

Anchor everything to the subject. Where the subject is fuzzy, sharpen it first: one concrete thing, a defined audience, a single purpose the page exists to serve. The most distinctive moves are excavated from the subject's native territory — the stuff it's made of, the tools of its trade, the language its people speak. Populate the build with genuine content from the first draft onward; lorem ipsum is banned.

Read the full file on GitHub · 84 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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 First seen · 84 lines · 72 tokens per session scan A c8314b66fb90

Subscribe to this mod's changes

design-artifact is a skill published in the GitHub repository plannotator/effective-html (3,717 stars, last pushed 6d ago), licensed MIT. It adds 72 tokens to every session and 2,274 once invoked, about $0.0003 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.

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