web-static

web-static is a skill for Claude Code from AdamBien/airails. It costs 183 tokens per session (2,510 once invoked), scanned A, original, MIT.

Instructions for building and maintaining modern static websites with semantic HTML and separate CSS, without external libraries or build tools. It also defines checks for accessibility, browser behavior, and rendered results.

In plain words
What is it for?
Use it for dependency-free static pages that do not need JavaScript, including their accessibility and visual verification.
Why use it?
It keeps simple websites lightweight and gives the agent a repeatable way to check that changes work in a browser.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Good fit Use it for dependency-free static pages that do not need JavaScript, including their accessibility and visual verification.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/adambien/airails/web-static
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 AdamBien/airails --skill web-static
Clone the repo
git clone --depth 1 https://github.com/AdamBien/airails

Made for: Claude Code.

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-static

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/adambien/airails/web-static"><img src="https://agentmods.dev/badge/skills/adambien/airails/web-static.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 183 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,510 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
  • 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 $0.00183 $0.02510
Opus 5.5 $0.00073 $0.01004
Sonnet 5.5 $0.00037 $0.00502
Haiku 4.5 $0.00018 $0.00251

Measured 1mo ago against content hash a31990348b17, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

web-static 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.

web/web-static/SKILL.md · 192 lines

How it starts

The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Build or maintain a static website using $ARGUMENTS. Apply all rules below strictly.

Composition

Compose with /web-conventions — it provides the baseline rules for semantic HTML, accessibility, modern CSS, design tokens, and the Baseline browser-support policy. Rules in this skill override it. When a page needs a small, bounded amount of JavaScript — a theme toggle, a copy button, a client-side filter — use /web-sprinkles, which keeps every rule below except the no-JavaScript constraint. For applications that need client-side state, routing, or templating, use /web-components instead.

Hard Constraints

  • No JavaScript — no <script> tags, no inline event handlers, no .js files; a page that genuinely needs a script belongs to /web-sprinkles, not to an exception here
  • No external dependencies — no frameworks, libraries, CDNs, or package managers
  • No build systems — no transpilation, bundling, preprocessing, Sass, Less, or Tailwind
  • No inline styles — all CSS in separate .css files
  • Baseline compliance — CSS features per the /web-conventions Baseline policy, enforced by the verification loop below

HTML Rules

HTML semantics, heading hierarchy, labels, and skip links follow /web-conventions.

CSS Rules

Design tokens, logical properties, modern CSS features, accessibility, and the Baseline policy follow /web-conventions. This stack adds:

  • Mobile-first responsive design with min-width breakpoints
  • Use content-visibility: auto for off-screen sections

CSS Reset Baseline

Every project starts with:

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: system-ui, -apple-system, sans-serif; line-height: 1.5; }

Interactive Patterns (CSS-Only)

When interactivity is needed, use these approaches — never JavaScript:

  • Accordion: <details>/<summary>
  • Modal: :target pseudo-class with anchor links
  • Tabs: hidden radio buttons with :checked + sibling selectors
  • Dropdown menu: :hover + :focus-within
  • Mobile hamburger: hidden checkbox with :checked + sibling selectors
  • Form styling: appearance: none to customize native controls
  • Form validation: standard input types plus constraint attributes (required, pattern, min/max) — the browser validates and blocks submission without any JavaScript; style feedback with :user-invalid/:user-valid (see web-conventions Form Rules)

Read the full file on GitHub · 192 lines

Files

What ships with it

2 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. 1mo ago First seen · 192 lines · 183 tokens per session scan A a31990348b17

Subscribe to this mod's changes

web-static is a skill published in the GitHub repository AdamBien/airails (59 stars, last pushed yesterday), licensed MIT. It adds 183 tokens to every session and 2,510 once invoked, about $0.0007 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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