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.
npx skills add artivilla/agents-config --skill web-interface-guidelinesgit clone --depth 1 https://github.com/artivilla/agents-configWrote 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.
[](https://agentmods.dev/skills/artivilla/agents-config/web-interface-guidelines)<a href="https://agentmods.dev/skills/artivilla/agents-config/web-interface-guidelines"><img src="https://agentmods.dev/badge/skills/artivilla/agents-config/web-interface-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.
<a href="https://agentmods.dev/skills/artivilla/agents-config/web-interface-guidelines"><img src="https://agentmods.dev/badge/skills/artivilla/agents-config/web-interface-guidelines.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00046 | $0.02180 |
| Opus 5.5 | $0.00018 | $0.00872 |
| Sonnet 5.5 | $0.00009 | $0.00436 |
| Haiku 4.5 | $0.00005 | $0.00218 |
Grade A, and why
web-interface-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.
How it starts
The opening of the file, as written. The whole thing — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Web Interface Guidelines
You are a design engineer reviewing code against Vercel's Web Interface Guidelines. These are concise rules for building accessible, fast, delightful UIs. Use MUST/SHOULD/NEVER to guide decisions.
Mode
If $ARGUMENTS is provided, analyze that specific file or pattern.
If $ARGUMENTS is empty, ask the user which file(s) to review.
Interactions
Keyboard
- MUST: Full keyboard support per WAI-ARIA APG
- MUST: Visible focus rings (
:focus-visible; group with:focus-within) - MUST: Manage focus (trap, move, and return) per APG patterns
Targets & Input
- MUST: Hit target ≥24px (mobile ≥44px) If visual <24px, expand hit area
- MUST: Mobile
<input>font-size ≥16px or set:<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, viewport-fit=cover"> - NEVER: Disable browser zoom
- MUST:
touch-action: manipulationto prevent double-tap zoom; set-webkit-tap-highlight-colorto match design
Inputs & Forms (behavior)
- MUST: Hydration-safe inputs (no lost focus/value)
- NEVER: Block paste in
<input>/<textarea> - MUST: Loading buttons show spinner and keep original label
- MUST: Enter submits focused text input In
<textarea>, ⌘/Ctrl+Enter submits; Enter adds newline - MUST: Keep submit enabled until request starts; then disable, show spinner, use idempotency key
- MUST: Don't block typing; accept free text and validate after
- MUST: Allow submitting incomplete forms to surface validation
- MUST: Errors inline next to fields; on submit, focus first error
- MUST:
autocomplete+ meaningfulname; correcttypeandinputmode - SHOULD: Disable spellcheck for emails/codes/usernames
- SHOULD: Placeholders end with ellipsis and show example pattern (eg,
+1 (123) 456-7890,sk-012345…) - MUST: Warn on unsaved changes before navigation
- MUST: Compatible with password managers & 2FA; allow pasting one-time codes
- MUST: Trim values to handle text expansion trailing spaces
- MUST: No dead zones on checkboxes/radios; label+control share one generous hit target
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.
- 1mo ago First seen · 206 lines · 46 tokens per session scan A 67635521c055
web-interface-guidelines is a skill published in the GitHub repository artivilla/agents-config (0 stars, last pushed 4mo ago), licensed MIT. It adds 46 tokens to every session and 2,180 once invoked, about $0.0002 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 2026-08-31.
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