agent-skills: Instructions file for Codex

AGENTS.md

agent-skills AGENTS.md is an instructions file for Codex, OpenCode from meteor/agent-skills. It costs 2,994 tokens per session, scanned A, original, MIT.

A set of repository instructions for creating, reviewing, auditing, and releasing skills in the meteor/agent-skills project. It explains what a skill is and how the project organizes its documentation.

In plain words
What is it for?
Use it when maintaining published skills, checking for documentation gaps, preparing releases, or understanding the repository’s frontmatter and audit process.
Why use it?
It gives contributors the project’s required workflow and conventions, reducing the chance of changing or publishing skills incorrectly.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Claude Code.

This is meteor/agent-skills's own configuration. It tells Codex and OpenCode how to work on agent-skills itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything agent-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to meteor/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.

Copy the file
curl -O https://raw.githubusercontent.com/meteor/agent-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/meteor/agent-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.

agentmods badge for agent-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/meteor/agent-skills/agents-md/github.svg)](https://agentmods.dev/instructions/meteor/agent-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/meteor/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/meteor/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.

agentmods 80×15 button for agent-skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/meteor/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/meteor/agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,994 This file is loaded in full into every session.
When invoked 2,994 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.02994 $0.02994
Opus 5.5 $0.01198 $0.01198
Sonnet 5.5 $0.00599 $0.00599
Haiku 4.5 $0.00299 $0.00299

Measured 1mo ago against content hash e2bfa0003d07, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

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 1mo 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 · 242 lines

How it starts

The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Authoring an Agent Skill for meteor/agent-skills

This document is the contract for everyone writing a skill in this repo. Plan 01 created it; subsequent plans must not break it without updating it here first.

Maintainer skills

Repository maintenance workflows live under .github/skills/. They help contributors maintain the published catalog but are not included in release ZIPs or the README catalog.

Skill Use when
skill-maintenance Creating, reviewing, or updating a published skill while preserving repository conventions.
skill-gap-audit Comparing Meteor documentation and source changes with current skill coverage.
release-publishing Preparing, testing, tagging, or publishing beta and stable plugin releases.

Audit and maintenance workflow

skill-gap-audit is read-only by default. It produces an evidence-backed report and does not change published skills. Confirmed findings move to skill-maintenance only when the user requests implementation.

skill-gap-audit
-> confirmed findings
-> authorized implementation scope
-> skill-maintenance
-> affected manual cases when routing or high-risk guidance changes
-> repository validation
-> release ZIP verification

When one request explicitly asks to audit and fix, complete the audit first, preserve its evidence, then load skill-maintenance and implement only confirmed findings within the requested scope. Do not implement uncertain findings or create proposed skills without explicit user approval.

pnpm run validate enforces frontmatter, naming, body size, prohibited-content rules, required evaluation-case files, plugin packaging consistency, and required revision and handoff fields in committed gap-audit reports. pnpm run check-links checks links in published and maintainer skills. The ZIP test suite verifies that .github/skills/ and repository maintenance evidence remain outside release artifacts.

Read the full file on GitHub · 242 lines

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.

  1. 1mo ago First seen · 242 lines · 2,994 tokens per session scan A e2bfa0003d07

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository meteor/agent-skills (10 stars, last pushed today), licensed MIT. It adds 2,994 tokens to every session, about $0.0120 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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