Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification.

Apache-2.0Auto-check passedFrontend & Design

Install Build Frontend

skills CLI
$ npx skills add hashgraph-online/awesome-codex-plugins --skill build-frontend -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install hashgraph-online/awesome-codex-plugins build-frontend --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/hashgraph-online/awesome-codex-plugins.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/Phelan164/codex-howto/skills/build-frontend .claude/skills/build-frontend && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
build-frontend
GitHub stars
1.2k
Token cost
~390 tokens
SKILL.md length
147 words
Files
3 (incl. references)
Skills in repo
686
Repo updated
First seen
Licence
Apache-2.0

At a glance

Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification.

  • Design implementation
  • SKILL.md covers Domain contract and Execute and verify
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Client-side defects

What it does

Build Frontend is an agent skill from hashgraph-online/awesome-codex-plugins. Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification. Use for UI features, design implementation, forms, client-side defects, and frontend refactors; do not use for backend-only or infrastructure-only work.

Its SKILL.md is about 390 tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `agents/openai.yaml` and `references/verification.md`).

It sits in Frontend & Design, covering Refactoring and Accessibility. The repository describes itself as: A curated list of awesome OpenAI Codex / ChatGPT plugins, skills, and resources. The 1 Codex Marketplace. See live plugins at: https://hol.org/plugins/best-codex-plugins. The licence is Apache-2.0.

When your agent uses it

  • Design implementation
  • Client-side defects
  • Frontend refactors
  • Do not use for backend-only

Example prompts

  • “/build-frontend”

What it can do on your machine

Read from SKILL.md and the folder at commit 78497e5. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Build Frontend loads about 390 tokens when it runs, and up to ~778 if it reads all its reference files. Until then it costs about 83 tokens; SKILL.md has 147 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~83
When it runs · the whole SKILL.md, loaded when a task matches
~390
With references · SKILL.md plus every file in references/, read only if the agent opens them
~778

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from hashgraph-online/awesome-codex-plugins at commit 78497e5, republished under its Apache-2.0 licence (© hashgraph-online). 147 words, ~390 tokens.

Download SKILL.mdSave it as .claude/skills/build-frontend/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.
name
build-frontend
description
Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification. Use for UI features, design implementation, forms, client-side defects, and frontend refactors; do not use for backend-only or infrastructure-only work.

Build Frontend

Domain contract

  • Preserve the project’s framework, styling system, and component conventions.
  • Do not invent API response fields or silently change backend contracts.
  • Do not replace an established design system with custom one-off styling.
  • Define loading, empty, error, success, and disabled states that the changed flow can reach.
  • Keep semantic HTML, keyboard navigation, focus behavior, labels, and contrast in scope.
  • Avoid speculative shared abstractions for a single component.
  • Treat screenshots and mockups as visual references, not proof of interaction behavior.
  • Do not claim visual verification unless the UI was rendered or inspected.

Execute and verify

Read references/verification.md for UI, accessibility, responsive, and browser verification. Load it when the task changes rendered behavior or interaction.

Reuse existing components and tokens, implement the smallest coherent change, and prove behavior at the lowest useful layer. Prefer:

text
component test → feature test → type/lint → build → visual/interaction check

If a command cannot run, report the exact blocker and what remains unverified.

© hashgraph-online, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 2 other files (references) in plugins/Phelan164/codex-howto/skills/build-frontend of hashgraph-online/awesome-codex-plugins.

  • SKILL.md
  • agents/openai.yaml
  • references/verification.md

Open the folder on GitHubat commit 78497e5

Compare with similar skills

Build Frontend next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Build Frontend compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Build Frontend this skillhashgraph-online/awesome-codex-plugins1.2k—~390Automated safety check: PassApache-2.0
Frontend UI FunctionalvictorGPT/vibeusage131—~939Automated safety check: PassMIT
Frontend Component Buildrampstackco/claude-skills940—~2.2kAutomated safety check: PassMIT
Experience Lwc Rtl Validateforcedotcom/sf-skills1.1k—~2.8kAutomated safety check: PassApache-2.0
Angular Componentaiskillstore/marketplace4301 repos~1.7kAutomated safety check: PassNone
Extract UI Componentbitovi/ai-enablement-prompts121—~1.1kAutomated safety check: PassMIT

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Questions about Build Frontend

What does Build Frontend do?

Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification. Build Frontend is an agent skill from hashgraph-online/awesome-codex-plugins. Build or modify frontend interfaces using repository-native components while preserving accessibility, responsive behavior, state handling, and visual verification.

When should I use Build Frontend?

Build Frontend fits situations like: design implementation; client-side defects; frontend refactors; do not use for backend-only.

How do I install Build Frontend in Claude Code?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill build-frontend -a claude-code`. Or copy the skill folder (plugins/Phelan164/codex-howto/skills/build-frontend in hashgraph-online/awesome-codex-plugins) into .claude/skills/build-frontend in your project. Claude Code loads it when a task matches its description.

How do I install Build Frontend in Codex?

Run `npx skills add hashgraph-online/awesome-codex-plugins --skill build-frontend -a codex`. Or copy the skill folder (plugins/Phelan164/codex-howto/skills/build-frontend in hashgraph-online/awesome-codex-plugins) into .agents/skills/build-frontend in your project. Codex loads it when a task matches its description.

Can I use Build Frontend in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add hashgraph-online/awesome-codex-plugins --skill build-frontend -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/build-frontend, .gemini/skills/build-frontend, .github/skills/build-frontend and .opencode/skills/build-frontend in your project.

What does Build Frontend need to run?

SKILL.md names no scripts, command-line tools or credentials: Build Frontend is instructions for the agent only.

Does Build Frontend access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Build Frontend safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Build Frontend use?

Build Frontend is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Build Frontend use?

About 390 tokens (SKILL.md is roughly 1.6k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 388 tokens, read only when the agent opens those files.

What are the alternatives to Build Frontend?

Skills that share tags, products or a category with Build Frontend: Frontend UI Functional (victorGPT/vibeusage, 131 stars), Frontend Component Build (rampstackco/claude-skills, 940 stars), Experience Lwc Rtl Validate (forcedotcom/sf-skills, 1.1k stars) and Angular Component (aiskillstore/marketplace, 430 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Build Frontend?

hashgraph-online (a GitHub organization) maintains it in hashgraph-online/awesome-codex-plugins, which has 1,242 GitHub stars. The repository holds 686 skills in this directory. The repository was last updated on October 8, 2026.

Source: hashgraph-online/awesome-codex-plugins on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.