skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from tomimor/skills. It costs 2,295 tokens per session, scanned A, original, MIT.

A contributor guide for a repository that stores reusable instructions for coding agents. It explains the repository layout, its own skills, and vendor skill sets supplied by other projects.

In plain words
What is it for?
Use it when adding a new skill, maintaining vendor links, checking the repository structure, or recreating the skill links used by Cursor and Claude Code.
Why use it?
It gives contributors the local rules needed to add or maintain skills without breaking how agents discover them. It also explains how the same skills are made available to different coding tools.

Instructions file for CodexOpenCode

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

This is tomimor/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 →

Needs its repository: it reads a path above its own folder, which exists only inside the repository. The line is │ ├── impeccable -> ../vendor/impeccable/.claude/skills/impeccable # Vendor symlink.

Reuse

Borrowing it

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

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README.md
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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.

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Per session 2,295 This file is loaded in full into every session.
When invoked 2,295 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 $0.02295 $0.02295
Opus 5.5 $0.00918 $0.00918
Sonnet 5.5 $0.00459 $0.00459
Haiku 4.5 $0.00230 $0.00230

Measured 26d ago against content hash 2fc615f35cda, 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 26d 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 · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Instructions for AI agents working in this repo.

Repo structure

skills/
├── skills/                  # All discoverable skills (own + vendor symlinks)
│   ├── miguel-review/       # Own skill (regular directory)
│   ├── impeccable -> ../vendor/impeccable/.claude/skills/impeccable  # Vendor symlink
│   └── ...
├── vendor/                  # Third-party skill repos (git submodules)
│   └── impeccable/          # pbakaus/impeccable
├── install.sh               # Install script with vendor support + `--check` validator
├── README.md                # Public catalog: every skill, badge count, vendor version table
├── index.html               # GitHub Pages landing page: mirrors the README catalog
└── AGENTS.md                # This file

~/.cursor/skills is a symlink to skills/. ~/.claude/skills is a real directory whose entries are per-skill symlinks back into skills/ -- Claude Code does not load skills from a symlinked top-level directory, so the per-skill symlinks are how it picks them up while live edits in this repo still take effect. Any skill directory (or symlink) inside skills/ with a SKILL.md is automatically available to agents in both Cursor and Claude Code.

Re-create the per-skill symlinks if anything drifts:

./install.sh --symlink --all --force --target ~/.claude/skills

Adding a new own skill

Own skills are skills you write and maintain yourself. They live as regular directories under skills/.

  1. Create the directory and SKILL.md:
skills/<skill-name>/
├── SKILL.md              # Required
├── references/           # Optional -- detailed docs the agent reads on demand
│   └── some-reference.md
└── examples.md           # Optional
  1. SKILL.md must have YAML frontmatter with name and description:
---
name: my-skill-name
description: >-
  What this skill does and when to use it. Include trigger phrases
  so the agent knows when to activate it. Use when the user mentions
  X, Y, or Z.
---

Read the full file on GitHub · 188 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. 26d ago Changed · +3 lines · +70 tokens per session 2fc615f35cda
  2. 1mo ago Changed · +41 lines · +772 tokens per session f2835fb2f53d
  3. 2mo ago First seen · 144 lines · 1,453 tokens per session scan A fd0eb14f90f6

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository tomimor/skills (3 stars, last pushed 15d ago), licensed MIT. It adds 2,295 tokens to every session, about $0.0092 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

skills AGENTS.md compared with instructions from other repositories

skills AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
skills AGENTS.mdtomimor/skillsInstructions file315d agoMITA2,295Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot