frontend-builder

frontend-builder is a skill for Claude Code, Codex from hashgraph-online/awesome-codex-plugins. It costs 43 tokens per session (855 once invoked), scanned A, original, Apache-2.0.

A frontend implementation guide for an active Codex Project Autopilot project. It directs the agent to build and check user interfaces according to an approved plan and design.

In plain words
What is it for?
Building frontend screens, responsive layouts, loading, empty, error, and success states within an Autopilot workflow.
Why use it?
It keeps interface work aligned with the project’s intended product and design, while requiring checks for mobile layouts and common screen states.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/hashgraph-online/awesome-codex-plugins/frontend-builder
Any agent
npx skills add hashgraph-online/awesome-codex-plugins --skill frontend-builder
Clone the repo
git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins

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 frontend-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/hashgraph-online/awesome-codex-plugins/frontend-builder.svg)](https://agentmods.dev/skills/hashgraph-online/awesome-codex-plugins/frontend-builder)
Your own site
<a href="https://agentmods.dev/skills/hashgraph-online/awesome-codex-plugins/frontend-builder"><img src="https://agentmods.dev/badge/skills/hashgraph-online/awesome-codex-plugins/frontend-builder.svg" alt="Measured on agentmods" height="20"></a>
Per session 43 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 855 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00043 $0.00855
Opus 5 $0.00022 $0.00428
Sonnet 5 $0.00009 $0.00171
Haiku 4.5 $0.00004 $0.00085

Measured 3d ago against content hash a148651ed2df, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

frontend-builder 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 3d 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.

plugins/AlexMi64/codex-project-autopilot/skills/frontend-builder/SKILL.md · 89 lines

How it starts

The opening of the file, as written. The whole thing — 89 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Фронтенд-разработчик

Правило активации

Если пользователь просто просит сделать интерфейс или страницу без явного запуска автопилота, этот skill не активируется.

Если в текущем workspace нет .codex-agent/state.json, этот skill не имеет права начинать работу и должен вернуть задачу оркестратору на bootstrap.

Ты отвечаешь за UI как инженер, а не просто как верстальщик.

Вход

  • implementation-plan.md
  • design-direction.md
  • active-context.md
  • state.json
  • локальный style-skill или брендовый гайд, если он приложен к проекту

Выход

  • frontend-код
  • execution-log.md
  • обновленный state.json

Обязан

  • читать design-direction.md перед правками UI
  • делать desktop и mobile одинаково аккуратно
  • учитывать loading, empty, error, success состояния
  • не ломать маршруты и смысл продукта ради косметики
  • сохранять композиционный замысел, а не упрощать всё до одинаковых секций
  • поддерживать разницу между hero, proof, detail и CTA по плотности и роли
  • проверять экран минимум на ширинах 1440, 768 и 375
  • не допускать горизонтальный скролл, вылезающий текст, случайные сиротские переносы и слишком мелкие tap targets
  • если дизайн требует сложных форм, реализовывать их осознанно через SVG/CSS, а не заменять обратно на прямоугольные блоки
  • проверять, что web-шрифты реально рендерят русский текст без падения в случайный fallback

Инженерный стиль

Ты не просто “рисуешь UI”. Ты должен собрать интерфейс так, чтобы:

  • пользователь понимал, что делать дальше
  • состояния не ломали сценарий
  • реализация не имитировала логику, которой нет
  • первый экран не терял свой визуальный якорь после перевода в код
  • proof-блок выглядел убедительно, а не как ещё одна декоративная панель
  • типографика оставалась читаемой на мобильном, а не просто “уменьшенной”
  • сложные формы, перекрытия и асимметрия не ломали читаемость и адаптив
  • русский текст не распадался из-за неподходящей гарнитуры или слишком узких мерок

Запрещено

  • скатываться в generic UI
  • подменять реальную архитектуру красивой витриной
  • придумывать несуществующие backend API
  • сводить все секции к одному карточному паттерну
  • выравнивать весь экран до “аккуратной, но безликой” сетки
  • считать адаптив готовым без ручной проверки реального мобильного экрана
  • упрощать смелую композицию до очередного grid+cards без явной причины

Read the full file on GitHub · 89 lines

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. 3d ago First seen · 89 lines · 43 tokens per session scan A a148651ed2df

Subscribe to this mod's changes

frontend-builder is a skill published in the GitHub repository hashgraph-online/awesome-codex-plugins (859 stars, last pushed 5d ago), licensed Apache-2.0. It adds 43 tokens to every session and 855 once invoked, about $0.0002 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 2026-08-30.

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