frontend-skills: Instructions file for Claude Code

AGENTS.md

frontend-skills AGENTS.md is an instructions file for Claude Code, Codex, OpenCode from rungchan2/frontend-skills. It costs 1,226 tokens per session, scanned A, original, Apache-2.0.

Instructions for a repository that develops and publishes Codex skills as separate marketplace plugins. They explain the repository layout, plugin manifests, skill folders, and installation commands.

In plain words
What is it for?
Use them when developing, organizing, installing, or publishing skills such as database setup, refactoring, project scaffolding, and end-to-end testing.
Why use it?
They give contributors a shared structure for adding skills and registering them in the marketplace. This reduces confusion about where code, documentation, and metadata belong.

Instructions file for Claude CodeCodexOpenCode

Written for Claude Code and Codex and OpenCode: Claude Code plugin machinery, but also the file is AGENTS.md. Also seen: mentions AGENTS.md; mentions Codex.

This is rungchan2/frontend-skills's own configuration. It tells Claude Code, Codex and OpenCode how to work on frontend-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything frontend-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to rungchan2/frontend-skills. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/rungchan2/frontend-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/rungchan2/frontend-skills

Made for: Claude Code, Codex, OpenCode.

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-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/rungchan2/frontend-skills/agents-md.svg)](https://agentmods.dev/instructions/rungchan2/frontend-skills/agents-md)
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<a href="https://agentmods.dev/instructions/rungchan2/frontend-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/rungchan2/frontend-skills/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,226 This file is loaded in full into every session.
When invoked 1,226 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.01226 $0.01226
Opus 5 $0.00613 $0.00613
Sonnet 5 $0.00245 $0.00245
Haiku 4.5 $0.00123 $0.00123

Measured 8d ago against content hash 96b201cbd29f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

frontend-skills AGENTS.md 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 8d 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.

AGENTS.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project Overview

Codex Plugin 레포지토리. AI 에이전트(Codex)의 기능을 확장하는 커스텀 스킬을 개발하고 마켓플레이스로 배포한다.

레포 구조

이 레포는 마켓플레이스 — 각 스킬이 개별 플러그인으로 등록되어 사용자가 원하는 것만 골라 설치한다.

frontend-skills/
├── .Codex-plugin/
│   └── marketplace.json          # 마켓플레이스 레지스트리
├── skills/                       # 각 디렉토리가 하나의 플러그인
│   ├── supabase-db-setting/      # 플러그인 예시:
│   │   ├── .Codex-plugin/
│   │   │   └── plugin.json       #   플러그인 매니페스트
│   │   └── skills/
│   │       └── supabase-db-setting/
│   │           ├── SKILL.md      #   스킬 정의
│   │           └── scripts/      #   스킬 리소스
│   ├── Codex-refactoring/
│   ├── claudemd-builder/
│   ├── project-scaffolder/
│   ├── guide-maker/
│   ├── prd-generator/
│   ├── tech-stack-generator/
│   ├── design-system-generator/
│   ├── mvp-roadmap-generator/
│   ├── web-to-markdown/
│   └── e2e-testing/
└── docs/                         # 참고 문서

설치 방식

# 마켓플레이스 등록
/plugin marketplace add heechan/frontend-skills

# 원하는 스킬만 골라 설치
/plugin install prd-generator@fs
/plugin install claudemd-builder@fs

Plugin / Skill 구조

각 플러그인은 plugin.json 매니페스트와 skills/ 하위 디렉토리를 가진다:

plugin-name/                      # 플러그인 루트
├── .Codex-plugin/
│   └── plugin.json               # 플러그인 매니페스트 (필수)
└── skills/
    └── skill-name/               # 스킬 디렉토리
        ├── SKILL.md              # YAML frontmatter + Markdown 지침 (필수)
        ├── scripts/              # 실행 가능 코드 (Python/Bash)
        ├── references/           # 참조 문서
        └── assets/               # 출력용 파일

호출: /fs:skill-name

SKILL.md Frontmatter

---
name: skill-name                    # 소문자, 하이픈만, 64자 이하 (선택, 없으면 디렉토리명)
description: >                      # 권장. 트리거 판단 기준. 1024자 이하
  스킬 설명 및 트리거 조건.
disable-model-invocation: false     # true면 사용자만 호출 가능 (선택)
allowed-tools: Read, Grep, Glob     # 스킬 활성 시 허용 도구 (선택)
context: fork                       # fork면 서브에이전트로 실행 (선택)
agent: Explore                      # context: fork 시 에이전트 타입 (선택)
---

Read the full file on GitHub · 124 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. 8d ago First seen · 124 lines · 1,226 tokens per session scan A 96b201cbd29f

Subscribe to this mod's changes

frontend-skills AGENTS.md is an instructions file published in the GitHub repository rungchan2/frontend-skills (2 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 1,226 tokens to every session, about $0.0061 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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