skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from BofAI/skills. It costs 2,278 tokens per session, scanned A, original, MIT.

Repository instructions for building skills, which are reusable capabilities that give AI agents domain knowledge, procedures, examples, and possible tool integrations. It describes the expected folders and the structure of each SKILL.md file.

In plain words
What is it for?
Use it when adding or reviewing skills in the repository, setting up their metadata, documenting dependencies and tags, or organising examples, resources, and helper scripts.
Why use it?
It gives contributors a shared format for organising and documenting skills. This reduces uncertainty about where files belong and what information a skill definition should contain.

Instructions file for CodexOpenCode

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

This is BofAI/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 โ†’

Reuse

Borrowing it

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

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Or the 80ร—15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80ร—15 button for skills AGENTS.md

Your own site ยท 80ร—15
<a href="https://agentmods.dev/instructions/bofai/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/bofai/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 2,278 This file is loaded in full into every session.
When invoked 2,278 The same file โ€” it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file โ€” 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 $0.02278 $0.02278
Opus 5.5 $0.00911 $0.00911
Sonnet 5.5 $0.00456 $0.00456
Haiku 4.5 $0.00228 $0.00228

Measured 2mo ago against content hash 09ba3d07477b, 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 โ€” prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency โ€” 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 ยท 386 lines

How it starts

The opening of the file, as written. The whole thing โ€” 386 lines โ€” stays where its author put it; the contents beside it link to each section on GitHub.

Agent Guidelines: Skills Repository

This document provides essential information for AI agents working on skills in this repository.


๐Ÿ“ Repository Structure

skills/
โ”œโ”€โ”€ AGENTS.md                    # This file - development guidelines
โ”œโ”€โ”€ sunswap/                     # SunSwap DEX trading skill
โ”‚   โ”œโ”€โ”€ SKILL.md                 # Main skill definition
โ”‚   โ”œโ”€โ”€ examples/                # Usage examples
โ”‚   โ”œโ”€โ”€ resources/               # Configuration files
โ”‚   โ””โ”€โ”€ scripts/                 # Helper scripts
โ””โ”€โ”€ [other-skills]/              # Future skills

๐ŸŽฏ What is a Skill?

A skill is a reusable capability that AI agents can use to accomplish specific tasks. Each skill:

  • Encapsulates domain knowledge (e.g., how to use SunSwap DEX)
  • Provides step-by-step instructions for AI agents
  • Includes examples showing common usage patterns
  • May depend on external tools (e.g., MCP servers)

๐Ÿ“ Skill File Format

SKILL.md Structure

Every skill must have a SKILL.md file with this format:

---
name: Skill Name
description: Brief description of what the skill does
version: <value from root VERSION>
dependencies:
  - dependency-1
  - dependency-2
tags:
  - tag1
  - tag2
---

# Skill Name

## Overview
[What this skill does]

## Prerequisites
[What needs to be set up before using this skill]

## Usage Instructions
[Step-by-step guide for AI agents]

## Examples
[Links to example files or inline examples]

## Error Handling
[Common errors and how to handle them]

## Security Considerations
[Important security notes]

YAML Frontmatter Fields

Field Required Description
name โœ… Human-readable skill name
description โœ… Brief description (1-2 sentences)
version โœ… Repository release version from the root VERSION file
dependencies โš ๏ธ List of required tools/servers (e.g., mcp-server-tron)
tags โš ๏ธ Searchable tags for skill discovery

Read the full file on GitHub ยท 386 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 Changed ยท +8 lines ยท +76 tokens per session 09ba3d07477b
  2. 2mo ago First seen ยท 378 lines ยท 2,202 tokens per session scan A 4e32d74f4ad2

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository BofAI/skills (164 stars, last pushed 4d ago), licensed MIT. It adds 2,278 tokens to every session, about $0.0091 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 2026-08-30.

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.mdBofAI/skillsInstructions file1644d agoMITA2,278Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA9,719GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143kyesterdayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149kyesterdayMITA4,680Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA5,516GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode