Borrowing it
Nothing to install: this file belongs to YankielDBC2/codex-skills-library. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/YankielDBC2/codex-skills-library/main/.agents/skills/frontend-production-ui/SKILL.mdgit clone --depth 1 https://github.com/YankielDBC2/codex-skills-libraryWrote 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/yankieldbc2/codex-skills-library/frontend-production-ui)<a href="https://agentmods.dev/skills/yankieldbc2/codex-skills-library/frontend-production-ui"><img src="https://agentmods.dev/badge/skills/yankieldbc2/codex-skills-library/frontend-production-ui/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/yankieldbc2/codex-skills-library/frontend-production-ui"><img src="https://agentmods.dev/badge/skills/yankieldbc2/codex-skills-library/frontend-production-ui.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 | $0.00029 | $0.00331 |
| Opus 5 | $0.00015 | $0.00166 |
| Sonnet 5 | $0.00006 | $0.00066 |
| Haiku 4.5 | $0.00003 | $0.00033 |
Grade A, and why
frontend-production-ui 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 9d 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.
What it actually says
Frontend Production UI
Goal
Ship frontend changes that look polished, work across screen sizes, and remain maintainable.
When to use
Use for React components, app pages, design systems, responsive layouts, accessibility, animations, and production UI polish.
When not to use
Do not use for backend-only logic, database design, server security, or non-UI documentation.
Inputs
Inspect the affected component, nearby components, shared styles, design tokens, accessibility patterns, and tests or stories if they exist.
Workflow
- Find the existing UI pattern before creating a new one.
- Keep components small and composable.
- Separate state, data loading, and presentation when practical.
- Prefer semantic HTML and accessible controls.
- Preserve responsive behavior across mobile, tablet, and desktop.
- Avoid hardcoded magic values when tokens or variables exist.
- Check loading, empty, error, and success states.
- Keep animations purposeful and non-blocking.
Quality bar
Good UI code is readable, accessible, responsive, visually consistent, and does not duplicate existing component patterns.
Validation
Run relevant lint, typecheck, tests, component previews, and build. Manually inspect responsive states when possible.
Final response
Report files changed, UI behavior changed, validation commands, and any states that were not manually verified.
What ships with it
4 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.
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.
- 9d ago First seen · 49 lines · 29 tokens per session scan A 25987b02c265
frontend-production-ui is a skill published in the GitHub repository YankielDBC2/codex-skills-library (10 stars, last pushed 1mo ago), licensed MIT. It adds 29 tokens to every session and 331 once invoked, about $0.0001 per session on Opus 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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