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agent-skills: Instructions file for Codex

AGENTS.md

agent-skills AGENTS.md is an instructions file for Codex, OpenCode from racastellanosm/agent-skills. It costs 2,799 tokens per session, scanned A, original, MIT.

Repository instructions for maintaining a monorepo, a single code repository containing multiple related tools or packages, that distributes skills for AI coding assistants. They define file standards, architecture, and contribution rules.

In plain words
What is it for?
Use them when adding or editing skills, checking specification compliance, following the repository layout, or using its approved scripts and tools.
Why use it?
They give coding agents consistent rules for changing, validating, and packaging the repository across several supported assistant systems.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: reads ~/.codex or $CODEX_HOME, but also the file is AGENTS.md. Also seen: reads .claude/ paths; mentions Claude Code; mentions AGENTS.md.

This is racastellanosm/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 →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is ./skills/docker-and-orchestration/scripts/verify-docker-stack.sh ../family-vulnerability-assestment-for-schools.

not rated 1repo 18d ago A scan 2,799 tokens original MIT
View source ↗ racastellanosm/agent-skills
Reuse

Borrowing it

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

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 2,799 This file is loaded in full into every session.
When invoked 2,799 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 $0.02799 $0.02799
Opus 5 $0.01399 $0.01399
Sonnet 5 $0.00560 $0.00560
Haiku 4.5 $0.00280 $0.00280

Measured 10d ago against content hash 7d881390b824, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, 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 10d 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 · 183 lines

How it starts

The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Project: agent-skills (Canonical Agent Skills Catalog)
Purpose: Open-standard Agent Skills monorepo implementing and distributing autonomous AI coding assistant skills (including the 5-phase QRSPI methodology) across all major harnesses (Gemini, Claude, Codex, OpenCode) and skills.sh.
Audience: AI agents and platform engineers contributing to or maintaining skills in this repository.
Standard: agentskills.io Open Specification
Documentation & Code Language: English (all code, templates, scripts, and documentation).
Version: 1.14.0

1. Vision & Architectural Invariants

This repository is the canonical reference implementation and distribution package for the QRSPI Methodology Agent Skill. Every contributor and AI agent modifying this codebase must uphold five non-negotiable invariants:

  1. Strict agentskills.io Compliance: SKILL.md must adhere to the open specification. The YAML frontmatter must validate with valid kebab-case name, description under 1024 characters with explicit semantic triggers, and standard metadata.
  2. Progressive Disclosure Architecture: Keep SKILL.md token-light (< 500 tokens for discovery). Defer granular checklists and stage templates to references/ for on-demand retrieval.
  3. Pure POSIX Compliance (Zero Host Dependencies): All shell scripts (.github/scripts/*.sh, skills/*/scripts/*.sh, skills/*/hooks/*.sh) must be pure POSIX /bin/sh-compliant, executable across macOS, Linux, and BSD without requiring bash, python, or external dependencies.
  4. Dogfooding & Modular Persistence: Any complex feature or refactoring must use the modular session structure (INDEX.md and YYYY-MM-DD-<slug>/1-question.md through 5-implement.md). By default, sessions live under .qrspi/, with configurable support for .docs/, .implementations/, or .sessions/ defined in AGENTS.md or user preference.
  5. Mandatory Turn Termination & User Sign-Off: Exactly one phase executed per turn. After persisting each phase artifact, the agent MUST stop calling tools, output its summary/questions, and end its turn, waiting for explicit user approval before advancing.

Read the full file on GitHub · 183 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. 10d ago First seen · 183 lines · 2,799 tokens per session scan A 7d881390b824

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository racastellanosm/agent-skills (1 stars, last pushed 18d ago), licensed MIT. It adds 2,799 tokens to every session, about $0.0140 per session on Opus 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.

Claude Codeagent-skillsagentskillsai-agentsantigravityskills-sh
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