agentmods.dev

popular-web-designs

popular-web-designs is a skill for Claude Code, Codex from StarryCod/cogitum. It costs 23 tokens per session (2,451 once invoked), scanned A, a copy of popular-web-designs, MIT.

A catalogue of 54 real website design systems, including their colours, fonts, spacing, components, shadows, and responsive layouts, written as HTML and CSS guidance.

In plain words
What is it for?
Use it to style generated HTML/CSS after a known design language such as Stripe, Linear, or Vercel, and combine the guidance with a broader design process.
Why use it?
It gives an agent concrete visual references when creating a web page instead of leaving every design decision open-ended.

Skill for Claude CodeCodex

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

not rated 11 3mo ago A scan 23 tokens copy · 98% MIT
View the source file StarryCod/cogitum npmjs.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.

agentmods
npx agentmods add skills/starrycod/cogitum/popular-web-designs
Any agent
npx skills add StarryCod/cogitum --skill popular-web-designs
Clone the repo
git clone --depth 1 https://github.com/StarryCod/cogitum

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/starrycod/cogitum/popular-web-designs.svg)](https://agentmods.dev/skills/starrycod/cogitum/popular-web-designs)
Your own site
<a href="https://agentmods.dev/skills/starrycod/cogitum/popular-web-designs"><img src="https://agentmods.dev/badge/skills/starrycod/cogitum/popular-web-designs.svg" alt="Measured on agentmods" height="20"></a>
Per session 23 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,451 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 98% 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 $0.00023 $0.02451
Opus 5 $0.00012 $0.01226
Sonnet 5 $0.00005 $0.00490
Haiku 4.5 $0.00002 $0.00245

Measured 6d ago against content hash 0d6e019d4a98, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

popular-web-designs 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 6d 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.

Origin

This is a copy

98% identical to popular-web-designs — 8 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.

cogitum/data/skills/creative/popular-web-designs/SKILL.md · 214 lines

How it starts

The opening of the file, as written. The whole thing — 214 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.

  • claude-design — use for the design process and taste (scoping a brief, producing variants, verifying a local HTML artifact, avoiding AI-design slop). Pair it with this skill when the user wants a thoughtfully-designed page styled after a known brand: claude-design drives the workflow, this skill supplies the visual vocabulary.
  • design-md — use when the deliverable is a formal DESIGN.md token spec file, not a rendered artifact.

How to Use

  1. Pick a design from the catalog below
  2. Load it: skills(name="popular-web-designs", file_path="templates/<site>.md")
  3. Use the design tokens and component specs when generating HTML
  4. Pair with the generative-widgets skill to serve the result via cloudflared tunnel

Each template includes a Cogitum 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 write_file for HTML creation and browser_vision 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>
  <!-- Paste the Google Fonts <link> from the template's Cogitum notes -->
  <link href="https://fonts.googleapis.com/css2?family=..." rel="stylesheet">
  <style>
    /* Apply the template's color palette as CSS custom properties */
    :root {
      --color-bg: #ffffff;
      --color-text: #171717;
      --color-accent: #533afd;
      /* ... more from template Section 2 */
    }
    /* Apply typography from template Section 3 */
    body {
      font-family: 'Inter', system-ui, sans-serif;
      color: var(--color-text);
      background: var(--color-bg);
    }
    /* Apply component styles from template Section 4 */
    /* Apply layout from template Section 5 */
    /* Apply shadows from template Section 6 */
  </style>
</head>
<body>
  <!-- Build using component specs from the template -->
</body>
</html>

Read the full file on GitHub · 214 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. 6d ago First seen · 214 lines · 23 tokens per session scan A 0d6e019d4a98

Subscribe to this mod's changes

popular-web-designs is a skill published in the GitHub repository StarryCod/cogitum (11 stars, last pushed 3mo ago), licensed MIT. It adds 23 tokens to every session and 2,451 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. It is 98% identical to popular-web-designs, differing in 8 lines, and is treated as a copy.

CSS and stylingDesign and UXFrontendagentagenticaianthropicclicssdesign-systemshtmltemplatesuiweb-development
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