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 ABilenduke/copilot-developer --skill frontend-craftgit clone --depth 1 https://github.com/ABilenduke/copilot-developerWrote 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/abilenduke/copilot-developer/frontend-craft)<a href="https://agentmods.dev/skills/abilenduke/copilot-developer/frontend-craft"><img src="https://agentmods.dev/badge/skills/abilenduke/copilot-developer/frontend-craft/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/abilenduke/copilot-developer/frontend-craft"><img src="https://agentmods.dev/badge/skills/abilenduke/copilot-developer/frontend-craft.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 | $0.00044 | $0.01154 |
| Opus 5.5 | $0.00018 | $0.00462 |
| Sonnet 5.5 | $0.00009 | $0.00231 |
| Haiku 4.5 | $0.00004 | $0.00115 |
Grade A, and why
frontend-craft 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 — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Craft
Make the interface serve its audience and task, with deliberate visual decisions and evidence from the rendered result. Work with the project's framework and tools; HTML, CSS, accessibility, and content are foundations across stacks.
Establish the brief
Inspect the relevant page or component, existing design system, content, assets, and project instructions. Identify the audience, primary action, and whether the assignment is new design, refinement, implementation of a supplied design, or review. Preserve the existing identity and behavior unless changing them is part of the request.
Resolve discoverable details from the project. Ask only when an unresolved choice would materially change the result; otherwise state a useful assumption and proceed. Choose one defensible direction autonomously. Offer alternatives when requested or when they help resolve a consequential ambiguity. A small edit needs a small decision, not a new design process.
Use the brief and real content to establish hierarchy, density, typography, color, imagery, and motion. Explain the few choices that matter. Existing tokens and component conventions are the starting point. For new systems, establish a compact, coherent vocabulary without installing a framework or design system merely to satisfy this skill.
Load the guidance the task needs
| Work | Reference |
|---|---|
| New visual direction, expressive public site, composition or typography | Art direction |
| Operational interface, existing product, reusable component, dense information | Product interfaces |
| Markup, styling, responsive layout, long or variable content | HTML and CSS |
| Interactive controls, forms, keyboard, focus, contrast, reflow, motion | Accessibility |
| Public page, content-heavy site, navigation or search discoverability | Public-page SEO |
| Visual critique, browser verification, final assessment of a changed interface | Rendered review |
What ships with it
14 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.
- agents/openai.yaml 287 B
- references/accessibility.md 3.7 KB
- references/art-direction.md 3.1 KB
- references/html-css.md 3.1 KB
- references/product-interfaces.md 3.2 KB
- references/public-page-seo.md 2.5 KB
- references/rendered-review.md 3.0 KB
- references/sources.md 9.3 KB
- third-party/anthropic-frontend-design/LICENSE.txt 9.9 KB
- third-party/impeccable/LICENSE 11 KB
- third-party/impeccable/NOTICE.md 503 B
- third-party/NOTICE.md 2.1 KB
- third-party/taste-skill/LICENSE 1.0 KB
- third-party/vercel-web-interface-guidelines/LICENSE 1.0 KB
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 · 97 lines · 44 tokens per session scan A 4cd14d1a81d7
frontend-craft is a skill published in the GitHub repository ABilenduke/copilot-developer (4 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 1,154 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 2026-09-16.
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