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skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from agent0lab/skills. It costs 455 tokens per session, scanned A, original, MIT.

Instructions for maintaining skills in the agent0lab/skills repository, including its purpose, conventions, evidence standards, and rules against inventing facts.

In plain words
What is it for?
Creating or editing skill instructions, organizing references, checking exact identifiers, and handling disagreements or version-sensitive information.
Why use it?
They keep skill files consistent, concise, and grounded in authoritative sources.

Instructions file for CodexOpenCode

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

This is agent0lab/skills's own configuration. It tells Codex and OpenCode how to work on 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 skills configures →

not rated 5repo 7mo ago A scan 455 tokens original MIT
View source ↗ agent0lab/skills
Reuse

Borrowing it

Nothing to install: this file belongs to agent0lab/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/agent0lab/skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/agent0lab/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 skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/agent0lab/skills/agents-md/github.svg)](https://agentmods.dev/instructions/agent0lab/skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/agent0lab/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/agent0lab/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 skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/agent0lab/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/agent0lab/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 455 This file is loaded in full into every session.
When invoked 455 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 $0.00455 $0.00455
Opus 5.5 $0.00182 $0.00182
Sonnet 5.5 $0.00091 $0.00091
Haiku 4.5 $0.00046 $0.00046

Measured 2mo ago against content hash 4750d9d15f1a, 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 · 45 lines

How it starts

The opening of the file, as written. The whole thing — 45 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

Repository Purpose

This repository contains agent skills for the ERC-8004 Trustless Agents ecosystem. Each top-level directory (8004/, agent0/) is a self-contained skill following the Amp skill structure.

Ground Rules

  • NEVER MAKE THINGS UP. If you don't know something, notify your human.
  • Double-check everything to ensure it's valid and not made up.

Conventions

  • Each skill has a SKILL.md with YAML frontmatter (name, description) as its entry point.
  • Reference files in references/ are loaded lazily — one concept per file, kept concise.
  • The agents/ subdirectories contain platform-specific agent configs (e.g., openai.yaml).
  • EIP text is the normative baseline. Contracts repo is implementation evidence. Forum threads are rationale/debate.

When Editing Skills

  • Keep SKILL.md under 500 lines.
  • Keep individual reference files focused on a single concept.
  • Use exact identifiers and field names from the spec — do not invent aliases.
  • Mark version-sensitive content (SDK method names, package names, deployment addresses) with caveats.
  • If sources disagree, report the disagreement explicitly rather than picking a side silently.

When Answering ERC-8004 Questions

  • Separate normative spec requirements from implementation status and open discussion.
  • Include date-sensitive caveats for deployment and support claims.
  • Payment rails are explicitly out of scope for ERC-8004.

When Answering Agent0 Questions

  • Do not mix TypeScript and Python APIs in one recipe.
  • Always ask for network, chainId, RPC URL, and signer details before write workflows.
  • Treat indexer/search data as eventually consistent with on-chain state.

Cross-Skill References

  • The 8004 skill covers protocol-level spec questions. The agent0 skill covers SDK integration.
  • If a user asks a spec question while in the agent0 context, reference the 8004 skill.
  • If a user asks how to implement something while in the 8004 context, reference the agent0 skill.
  • Both skills share a common glossary of terms. Prefer spec-defined terms over informal aliases.

Read the full file on GitHub · 45 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. 2mo ago First seen · 45 lines · 455 tokens per session scan A 4750d9d15f1a

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository agent0lab/skills (5 stars, last pushed 7mo ago), licensed MIT. It adds 455 tokens to every session, about $0.0018 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
Related

skills AGENTS.md compared with instructions from other repositories

skills AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
skills AGENTS.mdagent0lab/skillsInstructions file57mo agoMITA455Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k2d agoMITA4,313Codex, OpenCode