Borrowing it
Nothing to install: this file belongs to alphabetc1/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/alphabetc1/agent-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/alphabetc1/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/alphabetc1/agent-skills/agents-md)<a href="https://agentmods.dev/instructions/alphabetc1/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/alphabetc1/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/alphabetc1/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/alphabetc1/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 | $0.00370 | $0.00370 |
| Opus 5.5 | $0.00148 | $0.00148 |
| Sonnet 5.5 | $0.00074 | $0.00074 |
| Haiku 4.5 | $0.00037 | $0.00037 |
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.
What it actually says
Agent Skills Repo Rules
This repository is an agent-skills repository.
When you add or update a skill in this repository, you must follow these rules:
Required layout
- Create the skill under
skills/<name>/. - Add at least:
README.mdSKILL.mdinstall.sh
- If the skill should support native PowerShell installation, also add
install.ps1. - Keep scripts, assets, examples, references, docs, and any other skill-specific files inside that skill's own directory.
- Do not place skill-specific files at the repository root.
Discovery rules
- The root installers auto-discover installable skills from
skills/*/install.shandskills/*/install.ps1. - Do not add manual registration code to the root installers just to make a new skill discoverable.
- Ensure
skills/<name>/install.shis executable, otherwise the root Bash installer will not list or install the skill.
Documentation rules
- Update the root
README.mdwhen a new skill is added. - Add the new skill to the root skills table.
- Add a detailed section for the new skill if it is intended to be user-facing.
- Every new skill must include a complete architecture diagram and flow diagram in its own
README.md.
Behavior rules for agents
- If a requested skill does not fit this repository layout, stop and explain the conflict instead of inventing a new structure.
- Prefer small, repo-consistent changes over creating parallel conventions.
- Before finishing, run:
python scripts/validate_skill_layout.py
Or validate a single skill:
python scripts/validate_skill_layout.py <name>
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 · 46 lines · 370 tokens per session scan A 2f79d1dba512
agent-skills AGENTS.md is an instructions file published in the GitHub repository alphabetc1/agent-skills (2 stars, last pushed 7mo ago), licensed Apache-2.0. It adds 370 tokens to every session, about $0.0015 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.
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