Borrowing it
Nothing to install: this file belongs to byheaven/byheaven-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/byheaven/byheaven-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/byheaven/byheaven-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/byheaven/byheaven-skills/agents-md)<a href="https://agentmods.dev/instructions/byheaven/byheaven-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/byheaven/byheaven-skills/agents-md/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/instructions/byheaven/byheaven-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/byheaven/byheaven-skills/agents-md.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 | $0.01010 | $0.01010 |
| Opus 5 | $0.00505 | $0.00505 |
| Sonnet 5 | $0.00202 | $0.00202 |
| Haiku 4.5 | $0.00101 | $0.00101 |
Grade A, and why
byheaven-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 11d 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This file provides guidance to AI coding assistants (Claude Code, OpenAI Codex, and others) when working with code in this repository.
What This Repo Is
A monorepo of AI coding skills by Byheaven. Each skill lives under plugins/<name>/skills/<skill-name>/
and can be installed and used independently by any AI coding tool (Claude Code, OpenAI Codex, etc.).
For Claude Code users, skills are also bundled into plugins — the recommended installation method. Installing as a plugin enables auto-updates and the ability to enable or disable individual skills in bulk.
Plugin Structure
Every plugin must have:
plugins/<name>/
├── skills/<skill-name>/
│ ├── SKILL.md # Skill frontmatter: name, description, version
│ ├── agents/ # Codex app metadata
│ │ └── openai.yaml
│ └── assets/ # Skill assets: icons, images
│ └── favicon.png
├── README.md
└── LICENSE
No AGENTS.md inside individual plugins — this root file covers all of them.
Marketplace Registration
All plugins must be registered in .claude-plugin/marketplace.json. Add an entry to the plugins array with name, version, category, tags, keywords, description, and source (relative path). The marketplace entry is the authoritative source for plugin metadata and release versioning.
Authoring Conventions
- All code, comments, plans, changelogs, skill content, and plugin metadata must be in English
- Documentation defaults to English. The only standing exception is bilingual repository README documentation such as
README.mdandREADME.zh-CN.md. Any other non-English content requires an explicit user request. .claude-plugin/marketplace.jsonownerfield must include bothnameandemail- Skills go in
skills/<skill-name>/SKILL.md; asset/reference files go in subdirectories alongside the SKILL.md
⚠️ Skill Independence: Non-Negotiable Rule
Every skill MUST be fully self-contained and runnable in isolation.
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.
- 11d ago First seen · 101 lines · 1,010 tokens per session scan A 7a274eadfbd8
byheaven-skills AGENTS.md is an instructions file published in the GitHub repository byheaven/byheaven-skills (2 stars, last pushed 9d ago), licensed MIT. It adds 1,010 tokens to every session, about $0.0051 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).
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.
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.
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).