What is skills AGENTS.md?

Repository instructions for creating skills, which are reusable guidance packages for an agent. They require each skill to live in the repository's skills/ directory and to follow the standard skill-creator process.

Use them when creating or changing skills, including initializing, organizing, validating, and packaging them.

They prevent skills from being scattered across the project or built with an inconsistent structure.

How andy-spike/skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to andy-spike/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.

Copy the file

curl -O https://raw.githubusercontent.com/andy-spike/skills/master/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/andy-spike/skills

Made for: Codex, OpenCode.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/andy-spike/skills/agents-md/github.svg)](https://agentmods.dev/instructions/andy-spike/skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/andy-spike/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/andy-spike/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/andy-spike/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/andy-spike/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 147 This file is loaded in full into every session.

When invoked 147 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00147	$0.00147
Opus 5.5	$0.00059	$0.00059
Sonnet 5.5	$0.00029	$0.00029
Haiku 4.5	$0.00015	$0.00015

Measured 2mo ago against content hash 1b1bb2c393b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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.

AGENTS.md · 14 lines

What it actually says

AGENTS.md

Skills

All skills must be placed inside the skills/ directory at the root of this repository. Each skill lives in its own subdirectory (e.g., skills/recharts/).

When creating or modifying skills, always use the skill-creator skill that is available globally. Load it with the skill loader tool by name skill-creator. It provides:

scripts/init_skill.py for initializing new skills
scripts/package_skill.py for validating and packaging skills
Guidelines on structure, frontmatter, progressive disclosure, and bundled resources

Do not create skills outside of skills/ or invent your own skill structure. Follow the skill-creator workflow.

Changes

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 · 14 lines · 147 tokens per session scan A 1b1bb2c393b0

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository andy-spike/skills (1 stars, last pushed 7mo ago), licensed MIT. It adds 147 tokens to every session, about $0.0006 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.

Building agents

skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
skills AGENTS.mdandy-spike/skills	Instructions file	1	7mo ago	MIT	A	147	Codex, OpenCode
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

skills: Instructions file for Codex