skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from luongnv89/skills. It costs 1,039 tokens per session, scanned C, original, MIT.

Instructions for a repository containing reusable agent skills and specialist subagents. They describe validation checks for skill files and rules for authoring or reviewing them without making unintended edits.

In plain words
What is it for?
Use them when validating skills, checking metadata and structure, reviewing anti-patterns, or authoring skill definitions.
Why use it?
They standardize skill quality checks and clarify which agents may modify files versus only report findings.

Instructions file for CodexOpenCode

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

This is luongnv89/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 →

Reuse

Borrowing it

Nothing to install: this file belongs to luongnv89/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/luongnv89/skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/luongnv89/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/luongnv89/skills/agents-md/github.svg)](https://agentmods.dev/instructions/luongnv89/skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/luongnv89/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/luongnv89/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/luongnv89/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/luongnv89/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,039 This file is loaded in full into every session.
When invoked 1,039 The same file — it is already loaded in full.
Security scan C 1 finding. 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 $0.01039 $0.01039
Opus 5.5 $0.00416 $0.00416
Sonnet 5.5 $0.00208 $0.00208
Haiku 4.5 $0.00104 $0.00104

Measured 12d ago against content hash d90df843acf7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

skills AGENTS.md scanned grade C with 1 finding 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 12d 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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

- Ask first: destructive ops (`rm -rf`, `git reset --hard`, force-push, branch delete)
AGENTS.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Agent Skills Catalog

Project

Skill definitions live in skills/<name>/. Installed copies under ~/.claude/skills/ and ~/.agents/skills/ are the runtime, not the source: edit only this repo.

Commands

  • Validate one skill: python3 ~/.claude/skills/skill-creator/scripts/quick_validate.py skills/<name>
  • Score one skill: asm eval skills/<name> (--json for per-category scores)
  • Package: python3 ~/.claude/skills/skill-creator/scripts/package_skill.py skills/<name> (writes dist/)
  • Scaffold: python3 ~/.claude/skills/skill-creator/scripts/init_skill.py <name> --path skills/
  • Check every evals/evals.json: python3 scripts/validate-evals.py
  • Trigger evals (tests the installed copy): python3 scripts/run-skill-evals.py <name> --runs 3
  • Local install: bash install.sh. It's an interactive TUI that installs for real, takes no flags, and needs a TTY
  • There is no npm, pnpm, make, or pytest here. Don't invent test commands.

Constraints

  • Never: edit installed skill copies (~/.claude/skills/, ~/.agents/skills/) from this repo
  • Never: hand-edit dist/; regenerate it with package_skill.py
  • Never: commit *-workspace/, .asm-improver/, .claude/scheduled_tasks.lock, secrets, .env, or **/credentials*
  • Never: add eval fixtures under skills/; they go in eval-fixtures/<name>/ (the skills/ plugin folder is capped at 512 files)
  • Never: commit or push without an explicit user request (drafting the message is fine)
  • Ask first: destructive ops (rm -rf, git reset --hard, force-push, branch delete)
  • Ask first: a change that touches more than one skill

Conventions

  • Every SKILL.md edit bumps metadata.version (patch for wording, minor for a new capability, major for a restructure), and the skill's row in the root README.md shows the same version
  • Quote any frontmatter string containing : # - < > | , & ? !
  • name equals the skill's own directory name, suite children included (skills/<umbrella>/<child>/). Each suite SKILL.md validates and versions independently
  • SKILL.md stays under 500 lines and 3000 words; overflow goes to references/
  • docs/README.md opens with the AI-skip HTML comment (copy it from any existing skill)
  • A skill that mutates a git repo has a ## Repo Sync Before Edits (mandatory) section. A skill that invokes another skill has a ## Dependency Preflight (mandatory) section
  • Small fix: make a minimal, targeted diff. Never rewrite a SKILL.md for a one-line change or refactor opportunistically
  • New skill: run init_skill.py, fill in SKILL.md, add docs/README.md, validate, then add a CHANGELOG entry under ## Unreleased
  • Before creating a skill, grep skills/*/SKILL.md for one that already owns the behavior
  • Renaming a skill: change the frontmatter name, the directory, and the README.md catalog references in the same commit
  • Commits use Conventional Commits (feat:, fix:, chore:, docs:). Breaking changes go in the body, not the title

Read the full file on GitHub · 54 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. 12d ago Changed · +1 lines · +37 tokens per session d90df843acf7
  2. 21d ago Changed · -2 lines · +198 tokens per session scan A → C 50f63280ab52
  3. 26d ago Changed · -10 lines · +60 tokens per session 8ec6713ca8be
  4. 1mo ago First seen · 65 lines · 744 tokens per session scan A 8b86d451fb0d

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository luongnv89/skills (136 stars, last pushed 2d ago), licensed MIT. It adds 1,039 tokens to every session, about $0.0042 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,649 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,549 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

deno copilot-instructions.md

Copilot instructions for denoland/deno, covering deno development guide for github copilot, network access, high level overview, key directories and key files to understand first.

denoland/deno · 3,077 tokens