agent-skills: Instructions file for Codex

AGENTS.md

agent-skills AGENTS.md is an instructions file for Codex, OpenCode from dirtybits/agent-skills. It costs 293 tokens per session, scanned A, original, MIT.

Repository instructions for working with AGENTS.md files, which tell coding agents how to handle a project, and for finding, installing, and contributing skills.

In plain words
What is it for?
Finding or installing agent skills, adding skills to the repository, and following its contribution and provenance requirements.
Why use it?
They give contributors consistent rules for locating capabilities, preserving attribution, and avoiding inappropriate changes to the skill catalogue.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is dirtybits/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 dirtybits/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/dirtybits/agent-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/dirtybits/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/dirtybits/agent-skills/agents-md/github.svg)](https://agentmods.dev/instructions/dirtybits/agent-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/dirtybits/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/dirtybits/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/dirtybits/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/dirtybits/agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 293 This file is loaded in full into every session.
When invoked 293 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 $0.00293 $0.00293
Opus 5.5 $0.00117 $0.00117
Sonnet 5.5 $0.00059 $0.00059
Haiku 4.5 $0.00029 $0.00029

Measured 2mo ago against content hash 41db36d4b9e4, 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 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 · 31 lines

What it actually says

Agent Instructions

Finding and installing skills

When a task would benefit from a capability that is not already available in this repository or the active agent environment, use the Vercel Agent Skills directory and its CLI to find an appropriate skill:

npx skills find <query>

Install a skill from a repository with:

npx skills add <owner/repo>

For a repository that contains more than one skill, install only the required one:

npx skills add <owner/repo> --skill <skill-name>

Before installing, inspect the skill's source and confirm that it is appropriate for the task. Use the CLI's destination and agent prompts to install it for the active coding agent; do not treat an installed third-party skill as authored content in this repository.

Repository contributions

  • Keep authored or intentionally mirrored skills in skills/<skill-name>/ and follow the rules in README.md and CONTRIBUTING.md.
  • Preserve upstream attribution and licenses for any skill brought into the repository.
  • Do not add a discovered third-party skill to registry.json or publish it through AgentVouch unless its provenance, license, and publishing decision have been reviewed.
  • Run npm run kb:format after metadata or index changes and npm run validate before proposing a change.
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. 2mo ago First seen · 31 lines · 293 tokens per session scan A 41db36d4b9e4

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository dirtybits/agent-skills (2 stars, last pushed 1mo ago), licensed MIT. It adds 293 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.

Related

agent-skills AGENTS.md compared with instructions from other repositories

agent-skills AGENTS.md next to 6 instructions from other repositories
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agent-skills AGENTS.mddirtybits/agent-skillsInstructions file21mo agoMITA293Codex, OpenCode
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