What are Claude Code Skills?

Claude Code Skills are reusable prompt templates stored as markdown files in your project's .claude/skills/ directory. They let you codify best practices and common workflows into slash commands that Claude follows consistently.

How do I create a Claude Code Skill?

Create a markdown file in .claude/skills/ with instructions for Claude. The filename becomes the command name — for example, .claude/skills/code-review.md can be invoked with /code-review during a Claude Code session.

Can I share skills with my team?

Yes. Skills stored in .claude/skills/ can be committed to version control so every team member has access to the same standardized workflows. You can also organize skills into subdirectories by category.

What is the difference between project and global skills?

Project skills (.claude/skills/) are specific to the current project and are committed to git. Global skills (~/.claude/skills/) are personal skills available across all your projects.

codex

40Community RegistryGeneralby robbyt · MIT

OpenAI Codex CLI integration with MCP server and skills for web search, plan review, code review, and codebase analysis

Community PluginView Source

Overview

A collection of Claude Code skills and plugins.

Note: This marketplace is under active development and has not yet reached a stable release. Skills may be renamed, reorganized, or change considerably. A stable release is expected soon.

Installation

bash

/plugin marketplace add robbyt/claude-skills

After adding the marketplace, run /exit and restart Claude Code with claude --continue.

To install individual skills:

Run /plugin plugins
Select Browse and install plugins
Select the robbyt-claude-skills marketplace

To update skills:

Run /plugin plugins
Select Manage and uninstall plugins
Select robbyt-claude-skills
Select the plugins to update

Requirements

Some plugins require the following tools:

•uv - Python package installer and runner (installation guide)
•jq - JSON processor for parsing tool input

Tool Versions

External formatters are called directly from your PATH:

•ruff - Python formatter (install via uv sync)
•black - Python formatter (install via uv sync)
•gofmt - Go formatter (version matches your installed Go)
•swiftformat - Swift formatter (install via brew install swiftformat)

For reproducible formatting, pin tool versions in your project's dependency files (pyproject.toml, go.mod, etc.).

Security

Claude Code plugins can contain scripts that run on your local computer. Only install plugins from sources you trust. Consider enabling the sandbox feature: /sandbox (see sandboxing docs)

Available Plugins

claude-md

Tools for managing CLAUDE.md memory files. Includes reflect skill for analyzing conversation history to improve memory files. Trigger with reflect on this session or reflect on this conversation.

codex

Integrates the OpenAI Codex CLI for code reviews, plan review, and codebase analysis. Includes MCP server integration and three skills: diff-review, plan-review, and codebase-analysis. Trigger with use codex to ..., ask codex ..., or have codex review ....

Requirements: Codex CLI (installation guide) with API keys or OAuth configured.

gemini

Integrates the Gemini CLI for code reviews, web search via Google Search, plan review, and codebase analysis. Includes four skills: web-search, diff-review, plan-review, and codebase-analysis. Trigger with use gemini to ... or ask gemini ....

Requirements: Gemini CLI v0.17.0+ (installation guide) with authentication configured.

gh-cli

Interacts with GitHub using the gh CLI for PR management, issues, repository operations, GitHub Actions, and viewing GitHub file links. Triggers on gh mentions or GitHub operations such as viewing a github.com link.

Requirements: GitHub CLI (installation guide) with authentication configured (gh auth login).

go-formatter

Formats Go files with gofmt after Write/Edit/MultiEdit operations. Runs as a PostToolUse hook.

go-style-guide

Reviews Go code against a style guide combining Google and Uber Go style guides. Identifies issues not typically found by static analysis. Trigger with review this Go code or review my PR.

python-formatter-black

Formats Python files with black after Write/Edit/MultiEdit operations. Runs as a PostToolUse hook.

python-formatter-ruff

Formats Python files with ruff after Write/Edit/MultiEdit operations. Runs as a PostToolUse hook. Ruff formats faster than Black.

Note: Do not enable both python-formatter-ruff and python-formatter-black simultaneously, as both will attempt to format the same files.

swift-formatter

Formats Swift files with swiftformat after Write/Edit/MultiEdit operations. Runs as a PostToolUse hook. Falls back to swift format (built-in) if swiftformat is not installed.

Requirements: swiftformat (install via brew install swiftformat) or Swift toolchain

Development

To use locally during development:

bash

/plugin marketplace add /path/to/claude-skills
/plugin install claude-md

License

MIT

Install & Usage

Create the skills directory

mkdir -p .claude/skills

Download the skill file

mkdir -p .claude/skills && curl -o .claude/skills/codex.md https://raw.githubusercontent.com/robbyt/claude-skills/main/SKILL.md

Invoke in Claude Code

/codex

View source on GitHub

code-reviewmcpcodexopenaiaiweb-searchcodebase-analysisplan-review

Frequently Asked Questions

What is codex?

OpenAI Codex CLI integration with MCP server and skills for web search, plan review, code review, and codebase analysis

How to install codex?

To install codex, create the .claude/skills directory in your project, then run the curl command to download the skill file. Once installed, invoke it in Claude Code with /codex.

What is codex best for?

codex is a community categorized under General. It is designed for: code-review, mcp, codex, openai, ai, web-search, codebase-analysis, plan-review. Created by robbyt.