Borrowing it
Nothing to install: this file belongs to lyhcode/agent-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/lyhcode/agent-skills/main/CLAUDE.mdgit clone --depth 1 https://github.com/lyhcode/agent-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/lyhcode/agent-skills/claude-md)<a href="https://agentmods.dev/instructions/lyhcode/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/lyhcode/agent-skills/claude-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/lyhcode/agent-skills/claude-md"><img src="https://agentmods.dev/badge/instructions/lyhcode/agent-skills/claude-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 | $0.00290 | $0.00290 |
| Opus 5.5 | $0.00116 | $0.00116 |
| Sonnet 5.5 | $0.00058 | $0.00058 |
| Haiku 4.5 | $0.00029 | $0.00029 |
Grade A, and why
agent-skills CLAUDE.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 2mo 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.
What it actually says
Agent Skills Repository
A collection of agent skills following the Agent Skills specification.
Project Structure
agent-skills/
├── .claude-plugin/
│ └── marketplace.json # Claude Code Plugin manifest
├── skills/
│ └── <skill-name>/
│ ├── SKILL.md # Skill definition (required)
│ ├── scripts/ # Executable scripts (optional)
│ └── reference/ # Supporting docs (optional)
├── template/
│ └── SKILL.md # Template for new skills
├── CLAUDE.md
├── README.md
└── LICENSE
Conventions
- Skill directories use kebab-case naming
- Each skill must have a
SKILL.mdwith YAML frontmatter:name: required, max 64 chars, lowercase letters/numbers/hyphens only, cannot contain "anthropic" or "claude"description: required, max 1024 chars, should describe what the skill does AND when to use it
- SKILL.md body should be < 5k tokens; put detailed reference in separate files
- Skills use progressive disclosure: metadata → instructions → linked files
- After adding a new skill, update
marketplace.jsonandREADME.md
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.
- 2mo ago First seen · 32 lines · 290 tokens per session scan A 0a7be4dcd8f9
agent-skills CLAUDE.md is an instructions file published in the GitHub repository lyhcode/agent-skills (2 stars, last pushed 7mo ago), licensed MIT. It adds 290 tokens to every session, about $0.0012 per session on Opus 5.5. 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.
agent-skills CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agent-skills CLAUDE.mdlyhcode/agent-skills | Instructions file | 2 | 7mo ago | MIT | A | 290 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| vscode model-prompts.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 2,022 | GitHub Copilot |