skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from vuejs-ai/skills. It costs 3,082 tokens per session, scanned A, original, MIT.

A set of development instructions for building Vue skills, including branch rules, testing guidance, and scope notes for different Vue styles. Vue is a JavaScript framework for building web interfaces.

In plain words
What is it for?
Use it when developing or reviewing Vue-related skills, choosing between Composition API, Options API, JSX, or testing guidance, and checking the required development workflow.
Why use it?
It gives contributors a shared workflow and helps prevent changes from going into the release branch or being submitted without type checks.

Instructions file for CodexOpenCode

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

This is vuejs-ai/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 →

About the project

vue-skills is a collection of add-ons that provide guidance for developing Vue 3 applications, covering APIs, routing, state management, testing, JSX, and debugging. Vue developers use them to help AI agents apply framework-specific patterns and address common implementation problems. The catalogue entries are individual Vue development skills and instructions.

vuejs-ai/skills · 2,825 stars · on GitHub

Reuse

Borrowing it

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

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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Per session 3,082 This file is loaded in full into every session.
When invoked 3,082 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.03082 $0.03082
Opus 5 $0.01541 $0.01541
Sonnet 5 $0.00616 $0.00616
Haiku 4.5 $0.00308 $0.00308

Measured 7d ago against content hash e3c50fcd511c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 7d 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 · 310 lines

How it starts

The opening of the file, as written. The whole thing — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Vue Skills Development Guide

Branch Strategy

IMPORTANT: Never develop on main branch!

  • main is the publishing branch — it only contains released skills
  • dev is the development branch — all work happens here
  • Use the "Sync to Main" GitHub Action to publish changes from dev to main
Branch Purpose Direct commits
main Publishing (npx skills add vuejs-ai/skills) Forbidden
dev Development, tests, experiments Via PR only

Development Workflow

After completing any task, run:

pnpm typecheck

This ensures TypeScript types are correct before committing.

Skill Scopes

Skill Scope
vue-best-practices Vue 3 with Composition API, <script setup lang="ts">, TypeScript, SSR. Includes render functions for cases where templates can't handle the requirement.
vue-options-api-best-practices Vue 3 Options API style (data(), methods, this context). Each rule shows Options API solution only.
vue-jsx-best-practices JSX syntax in Vue (e.g., class vs className, JSX plugin config).
vue-testing-best-practices Testing with Vitest, Vue Test Utils, and Playwright for E2E.
vue-router-best-practices Vue Router 4 patterns, navigation guards, route params, and route-component lifecycle interactions.
vue-pinia-best-practices Pinia stores, state management patterns, store setup, and reactivity with stores.
vue-debug-guides Debugging and troubleshooting Vue 3: runtime errors, warnings, async error handling, SSR hydration issues.
create-adaptable-composable Creating reusable composables with MaybeRef/MaybeRefOrGetter input patterns.

Common Pitfalls & Best Practices

  • Vue-specific only: Reference files must cover Vue patterns and gotchas, not general web/JS knowledge.
  • No edge cases: Avoid niche scenarios, tool-specific quirks, and obvious/well-known practices.
  • Required structure: Each reference file needs title, impact level, task checklist, and incorrect/correct code examples.
  • SKILL.md is for coding agents: Follow official best practices: be concise (context window is a public good), assume the coding agent is smart (only add what it doesn't know), no hardcoded counts or historical background. Use progressive disclosure — SKILL.md is an overview that points to reference files.

Read the full file on GitHub · 310 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. 7d ago First seen · 310 lines · 3,082 tokens per session scan A e3c50fcd511c

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository vuejs-ai/skills (2,825 stars, last pushed 3mo ago), licensed MIT. It adds 3,082 tokens to every session, about $0.0154 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 2026-08-30.

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