Borrowing it
Nothing to install: this file belongs to PeterHdd/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/PeterHdd/agent-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/PeterHdd/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/peterhdd/agent-skills/agents-md)<a href="https://agentmods.dev/instructions/peterhdd/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/peterhdd/agent-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/peterhdd/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/peterhdd/agent-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 | $0.00655 | $0.00655 |
| Opus 5.5 | $0.00262 | $0.00262 |
| Sonnet 5.5 | $0.00131 | $0.00131 |
| Haiku 4.5 | $0.00065 | $0.00065 |
Grade A, and why
agent-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 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.
How it starts
The opening of the file, as written. The whole thing — 61 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidelines
Project Structure
This repository is an engineering skills catalog for AI agent runtimes (Claude Code, Codex). Built to the Agent Skills Spec. Contains 9 engineering skills.
skills/<skill-id>/
├── SKILL.md # Decision rules and workflow (required)
├── references/ # Deep code patterns and examples
│ └── *.md
└── scripts/ # Runnable CLI tools (Python/Bash)
└── *.py / *.sh
skills/<skill-id>/SKILL.md: Core skill definition with decision rules, loaded by the agent automatically.skills/<skill-id>/references/: Detailed code examples and patterns that SKILL.md links to. Agent reads on demand.skills/<skill-id>/scripts/: Standalone CLI tools the agent can run during sessions. All support--helpand output markdown.scripts/validate-skills.sh: Validates all skills have correct frontmatter and structure.
No app runtime, package build, or test suite is included.
Commands
# Validate all skills
./scripts/validate-skills.sh --no-skills-ref
# Install skills
npx skills add PeterHdd/agent-skills --all
npx skills add PeterHdd/agent-skills --skill engineering-frontend-developer
Skill Authoring Rules
- Frontmatter in each
SKILL.mdmust include:name: <skill-id>(matches folder name)description: "when to use this skill"(this is the trigger — agents activate the skill based on this)metadata.version: x.y.z
- Skill folder names use lowercase kebab-case (e.g.,
engineering-frontend-developer). - SKILL.md should contain "when X, do Y" decision rules, not persona descriptions or job listings.
- Reference files go in
references/— SKILL.md links to them withSee [Name](references/file.md) for .... - Scripts must be self-contained (stdlib only), support
--help, and output structured markdown. - All scripts must be executable (
chmod +x). - No placeholders, no stubs, no "implement here" comments in any file.
Pre-PR Checklist
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 · 61 lines · 655 tokens per session scan A 89615bdea038
agent-skills AGENTS.md is an instructions file published in the GitHub repository PeterHdd/agent-skills (11 stars, last pushed 8mo ago), licensed MIT. It adds 655 tokens to every session, about $0.0026 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 2026-08-30.
agent-skills AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agent-skills AGENTS.mdPeterHdd/agent-skills | Instructions file | 11 | 8mo ago | MIT | A | 655 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | 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 | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |