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.
curl -O https://raw.githubusercontent.com/rungchan2/frontend-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/rungchan2/frontend-skillsWrote 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/instructions/rungchan2/frontend-skills/agents-md)<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>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 | $0.01226 | $0.01226 |
| Opus 5 | $0.00613 | $0.00613 |
| Sonnet 5 | $0.00245 | $0.00245 |
| Haiku 4.5 | $0.00123 | $0.00123 |
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.
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)
---
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.
- 8d ago First seen · 124 lines · 1,226 tokens per session scan A 96b201cbd29f
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.
Other instructions, from other repositories
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.