Agent Skills plugin for Codex

CommunityPluginProductivity

Production-grade engineering skills for AI coding agents covering the full software development lifecycle from spec to ship.

How to install Agent Skills in Codex

1. Add the repo as a Codex plugin marketplace:

codex plugin marketplace add addyosmani/agent-skills

2. Install the plugin from it:

codex plugin add agent-skills@agent-skills

This repo ships a Codex marketplace file (.agents/plugins/marketplace.json). The first command adds it as a marketplace (Codex CLI reference); the second installs the plugin 'agent-skills'. 'agent-skills' is the marketplace name from that file. Check the repo README too. Command format: Codex CLI reference.

What it contains

Plugins in this marketplace (1)

  • agent-skills — Production-grade engineering skills for AI coding agents covering the full software development lifecycle from spec to ship.

Example prompts from the manifest

  • Help me choose the right engineering workflow for this task
  • Plan and implement this change using the relevant Agent Skills

About this listing

Agent Skills is a community plugin on GitHub by addyosmani. Its README documents a Codex install and the repo ships a Codex plugin manifest. It passed the CodexStacks quality filter for repos found this way (at least 500 stars, pushed in the last 90 days, not a fork or a list). OpenAI hasn't reviewed it and we haven't tested it. From its files we found 1 plugin. The manifest says version 0.6.13. It's one of 175 listings in the Productivity category.

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Agent Skills FAQ

How do I install Agent Skills in Codex?

Add the repo as a Codex plugin marketplace with codex plugin marketplace add addyosmani/agent-skills, then install it with codex plugin add agent-skills@agent-skills. Commands: the command format from the Codex CLI reference; check the repo README too.

Is Agent Skills an official Codex plugin?

No. Agent Skills is a community repo on GitHub by addyosmani. It passed the CodexStacks quality filter, but OpenAI hasn't reviewed it and we haven't tested it, so read the code before you install it.

What does Agent Skills include?

From its manifest and repo files, Agent Skills includes 1 plugin: agent-skills.

Details

Type
Plugin
Category
Productivity
Source
Community
Author
Addy Osmani
Version
0.6.13
License
MIT
GitHub stars
107,280 (at last sync)
Last push
2026-10-13
Manifest
.agents/plugins/marketplace.json
GitHub topics
antigravity, claude-code, cursor, skills
Source
https://github.com/addyosmani/agent-skills
Website
https://skills.addy.ie
Listed via
GitHub search: README documents a Codex install
Tested by CodexStacks
Not yet

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Listed on CodexStacks

Markdown

[![Listed on CodexStacks](https://codexstacks.com/badge.svg)](https://codexstacks.com/p/addyosmani-agent-skills/)

HTML

<a href="https://codexstacks.com/p/addyosmani-agent-skills/"><img src="https://codexstacks.com/badge.svg" alt="Listed on CodexStacks" width="172" height="28"></a>

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Agent SkillsCommunity Codex plugin · 1 pluginProduction-grade engineering skills for AI coding agents covering the full software development lifecycle from spec to…View on CodexStacks →
<a href="https://codexstacks.com/p/addyosmani-agent-skills/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #3a2c26;border-radius:12px;background:#0d0b0a;color:#f3ece6;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#f3ece6">Agent Skills</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#b5a9a1">Community Codex plugin · 1 plugin</span><span style="display:block;margin:0 0 10px;color:#ddd3cc">Production-grade engineering skills for AI coding agents covering the full software development lifecycle from spec to…</span><span style="font-size:12px;font-weight:600;color:#ffb347">View on CodexStacks →</span></a>

Markdown summary

**[Agent Skills on CodexStacks](https://codexstacks.com/p/addyosmani-agent-skills/)**: Community Codex plugin with 1 plugin.

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