skeleton: Instructions file for Codex

AGENTS.md

skeleton AGENTS.md is an instructions file for Codex, OpenCode from alexwoo-awso/skeleton. It costs 1,031 tokens per session, scanned C, original, MIT.

An AGENTS.md guide that gives coding agents project information, architecture notes, integration points, development commands, and important repository rules. AGENTS.md is a common instruction file supported by several coding tools.

In plain words
What is it for?
Finding setup, development, testing, quality, architecture, and project-specific guidance before making changes in the repository.
Why use it?
It gives an unfamiliar agent a starting point for understanding and working in the repository, even though this particular guide contains many placeholder sections.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Claude Code; reads ~/.codex paths.

This is alexwoo-awso/skeleton's own configuration. It tells Codex and OpenCode how to work on skeleton 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 skeleton configures →

Reuse

Borrowing it

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

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 skeleton AGENTS.md

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

Your own site · 80×15
<a href="https://agentmods.dev/instructions/alexwoo-awso/skeleton/agents-md"><img src="https://agentmods.dev/badge/instructions/alexwoo-awso/skeleton/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,031 This file is loaded in full into every session.
When invoked 1,031 The same file — it is already loaded in full.
Security scan C 2 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 $0.01031 $0.01031
Opus 5.5 $0.00412 $0.00412
Sonnet 5.5 $0.00206 $0.00206
Haiku 4.5 $0.00103 $0.00103

Measured 2mo ago against content hash 8cfcca1fe8cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

skeleton AGENTS.md scanned grade C with 2 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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- Describe your system architecture. Examples: -->

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- **Best approach:** Use cross-platform code that doesn't need output suppression (e.g., `subprocess.DEVNULL` in Python, `stdio: 'ignore'` in Node.js).
Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 171 lines

How it starts

The opening of the file, as written. The whole thing — 171 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to AI coding agents working with code in this repository. It follows the AGENTS.md open standard supported by Codex CLI, OpenClaw, Cursor, Aider, Google Jules, Gemini CLI, Windsurf, Devin, and many other tools.

Claude Code users: See CLAUDE.md for Claude Code specific instructions. Codex CLI users: See .codex/config.toml for project-level Codex configuration.


Project Overview

Project Name - Brief description of what the project does.

Architecture

Key Integration Points


Development Commands

Setup

# Initial setup steps

Development

# How to run the project locally

Testing

# How to run tests

Code Quality

# Linting, formatting, type checking commands

Architecture Deep Dive

Database Layer

Configuration System

Authentication


Critical Development Rules

These rules prevent recurring bugs documented in TODO.md and LESSONS_LEARNED.md:

Read the full file on GitHub · 171 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 · 171 lines · 1,031 tokens per session scan C 8cfcca1fe8cc

Subscribe to this mod's changes

skeleton AGENTS.md is an instructions file published in the GitHub repository alexwoo-awso/skeleton (1 stars, last pushed 8mo ago), licensed MIT. It adds 1,031 tokens to every session, about $0.0041 per session on Opus 5.5. A static security scan graded it C with 2 findings (hidden instructions, runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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