platform: Skill for Claude Code

.agents/skills/web-design-guidelines/SKILL.md

web-design-guidelines is a skill for Claude Code, Codex from tutur3u/platform. It costs 19 tokens per session (257 once invoked), scanned A, a copy of web-design-guidelines, Apache-2.0.

A review guide for checking user-interface code against Web Interface Guidelines. It covers interface quality and accessibility, meaning whether people with different abilities can use the interface.

In plain words
What is it for?
Use it to review specified UI files for accessibility and interface issues, then report findings in a concise file-and-line format.
Why use it?
It provides a repeatable way to find guideline violations instead of relying only on visual judgment. It also requires checking the latest version of the guidelines before a review.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is tutur3u/platform's own configuration. It tells Claude Code and Codex how to work on platform itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything platform configures →

Reuse

Borrowing it

Nothing to install: this file belongs to tutur3u/platform. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/tutur3u/platform/main/.agents/skills/web-design-guidelines/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/tutur3u/platform

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 web-design-guidelines

README.md
[![agentmods](https://agentmods.dev/badge/skills/tutur3u/platform/web-design-guidelines/github.svg)](https://agentmods.dev/skills/tutur3u/platform/web-design-guidelines)
Your own site
<a href="https://agentmods.dev/skills/tutur3u/platform/web-design-guidelines"><img src="https://agentmods.dev/badge/skills/tutur3u/platform/web-design-guidelines/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 web-design-guidelines

Your own site · 80×15
<a href="https://agentmods.dev/skills/tutur3u/platform/web-design-guidelines"><img src="https://agentmods.dev/badge/skills/tutur3u/platform/web-design-guidelines.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 257 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 100% 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 $0.00019 $0.00257
Opus 5.5 $0.00008 $0.00103
Sonnet 5.5 $0.00004 $0.00051
Haiku 4.5 $0.00002 $0.00026

Measured 1mo ago against content hash a868f120e145, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web-design-guidelines 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.

Origin

This is a copy

100% identical to web-design-guidelines — 4 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.

.agents/skills/web-design-guidelines/SKILL.md · 40 lines

What it actually says

Web Interface Guidelines

Review files for compliance with Web Interface Guidelines.

How It Works

  1. Fetch the latest guidelines from the source URL below
  2. Read the specified files (or prompt user for files/pattern)
  3. Check against all rules in the fetched guidelines
  4. Output findings in the terse file:line format

Guidelines Source

Fetch fresh guidelines before each review:

https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md

Use WebFetch to retrieve the latest rules. The fetched content contains all the rules and output format instructions.

Usage

When a user provides a file or pattern argument:

  1. Fetch guidelines from the source URL above
  2. Read the specified files
  3. Apply all rules from the fetched guidelines
  4. Output findings using the format specified in the guidelines

If files are not specified, infer the affected surface from the request and current changes. Ask only when the target remains materially ambiguous.

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 · -25 tokens per session a868f120e145
  2. 1mo ago First seen · 40 lines · 44 tokens per session scan A f4647ca866a3

Subscribe to this mod's changes

web-design-guidelines is a skill published in the GitHub repository tutur3u/platform (55 stars, last pushed today), licensed Apache-2.0. It adds 19 tokens to every session and 257 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to web-design-guidelines, differing in 4 lines, and is treated as a copy.

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