popular-web-designs

popular-web-designs is a skill for Claude Code, Codex from yc-software/qm. It costs 51 tokens per session (2,632 once invoked), scanned A, a copy of popular-web-designs, MIT.

A catalogue of 54 recognizable website design systems, including Stripe, Linear, Vercel, Notion, and Apple, with HTML and CSS guidance. Each describes visual details such as colors, fonts, spacing, components, and responsive behavior.

In plain words
What is it for?
Use it when a page should look like a specific named brand or design system. Pair it with a broader design process when the result needs careful visual decisions.
Why use it?
It removes the need to recreate a known brand's visual style from memory. The guidance gives the agent concrete values and patterns to apply to a page.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions OpenCode.

Good fit Use it when a page should look like a specific named brand or design system. Pair it with a broader design process when the result needs careful visual decisions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yc-software/qm/popular-web-designs
About the project

QM is a shared work environment for coding agents that gives each employee and conversation an isolated workspace while allowing collaboration in Slack and on the web. Startups use it to run agents for individuals, teams, and company operations, with selectable harnesses and models. The catalogue entries extend QM with skills, instructions, and settings.

yc-software/qm · 15,533 stars · on GitHub · x.com

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 yc-software/qm --skill popular-web-designs
Clone the repo
git clone --depth 1 https://github.com/yc-software/qm

Made for: Claude Code, Codex.

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 popular-web-designs

README.md
[![agentmods](https://agentmods.dev/badge/skills/yc-software/qm/popular-web-designs/github.svg)](https://agentmods.dev/skills/yc-software/qm/popular-web-designs)
Your own site
<a href="https://agentmods.dev/skills/yc-software/qm/popular-web-designs"><img src="https://agentmods.dev/badge/skills/yc-software/qm/popular-web-designs/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 popular-web-designs

Your own site · 80×15
<a href="https://agentmods.dev/skills/yc-software/qm/popular-web-designs"><img src="https://agentmods.dev/badge/skills/yc-software/qm/popular-web-designs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,632 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 33
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
Origin 91% copy Near-identical to another mod 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 $0.00051 $0.02632
Opus 5.5 $0.00020 $0.01053
Sonnet 5.5 $0.00010 $0.00526
Haiku 4.5 $0.00005 $0.00263

Measured 11d ago against content hash 8bf15e3f47dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

popular-web-designs scanned grade A with 1 finding 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 11d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

`curl -fsS http://localhost:<port>`, then
Origin

This is a copy

91% identical to popular-web-designs — 265 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills-seed/popular-web-designs/SKILL.md · 203 lines

How it starts

The opening of the file, as written. The whole thing — 203 lines — stays where its author put it; the contents beside it link to each section on GitHub.

54 real-world design systems ready for use when generating HTML/CSS. Each template captures a site's complete visual language: color palette, typography hierarchy, component styles, spacing system, shadows, responsive behavior, and practical agent prompts with exact CSS values.

Default look comes first

This skill is for when the user wants a page styled after a specific known brand. If they have not named one, use your deployment's house-style skill (a *-design skill in the Skills index, when installed) instead of picking from this catalog.

  • The house-style skill (*-design, when installed) — the org's default look as ready-to-apply tokens. Use it unless the user asks for a specific brand below.
  • taste-skill — use for the design process and taste (reading the brief, producing variants, verifying the result, avoiding AI-design slop). Pair it with this skill when the user wants a thoughtfully-designed page styled after a known brand: taste-skill drives the workflow, this skill supplies the visual vocabulary.

How to Use

  1. Pick a design from the catalog below
  2. Read it: skills({ action: "read", name: "popular-web-designs", path: "templates/<site>.md" })
  3. Use the design tokens and component specs when generating HTML
  4. Build with files action write, then serve the result with the publish skill

Each template includes an Implementation Notes block at the top with:

  • CDN font substitute and Google Fonts <link> tag (ready to paste)
  • CSS font-family stacks for primary and monospace
  • Reminders to use files action write for HTML creation and local headless Chromium for verification

HTML Generation Pattern

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Page Title</title>

    <link href="https://fonts.googleapis.com/css2?family=..." rel="stylesheet" />
    <style>
      :root {
        --color-bg: #ffffff;
        --color-text: #171717;
        --color-accent: #533afd;
      }

      body {
        font-family: "Inter", system-ui, sans-serif;
        color: var(--color-text);
        background: var(--color-bg);
      }
    </style>
  </head>
  <body></body>
</html>

Read the full file on GitHub · 203 lines

Files

What ships with it

54 files 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. 11d ago Changed · +1 lines 8bf15e3f47dc
  2. 1mo ago Changed 1877920ebb25
  3. 1mo ago Changed 010d09fa8f74
  4. 1mo ago Changed e99544bb8500
  5. 1mo ago First seen · 202 lines · 51 tokens per session scan A c2d2ad857706

Subscribe to this mod's changes

popular-web-designs is a skill published in the GitHub repository yc-software/qm (15,533 stars, last pushed today), licensed MIT. It adds 51 tokens to every session and 2,632 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). It is 91% identical to popular-web-designs, differing in 265 lines, and is treated as a copy.

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