Codex & Claude Code Skills

A collection of skills and plugins for Codex and Claude Code.

Available Plugins

cli-design

Ink.js CLI UI design skill with:

• string-width handling: Emoji/icon width calculation fixes for terminal alignment
• Component patterns: Screen/Part/Common component classification
• Custom hooks: useScreenState, useTerminalSize patterns
• React.memo optimization: Custom comparison functions for performance
• Testing patterns: ink-testing-library with Vitest

unity-development

Unity C# development skill with:

• unity-mcp-server tools: Symbol-based code exploration and editing
• VContainer DI: Dependency injection patterns
• UniTask: Async processing patterns
• Fail-Fast principle: No null-check defensive coding

speckit

Spec Kit skills (plugin) with:

• Requirements workflow: spec.md → plan.md → tasks.md flow
• Upstream update: GitHub Spec Kit version sync

github

GitHub workflow skills with:

• PR automation: gh-pr workflow and PR body templates
• PR status checks: gh-pr-check workflow for unmerged PRs and post-merge commits
• PR blocker diagnostics: gh-fix-pr workflow and inspection scripts (compat: gh-fix-ci)
• Issue analysis: gh-fix-issue workflow for analyzing Issues, extracting error context, and proposing fix plans

drawio

Draw.io diagram creation and editing skill with:

• XML structure: Direct .drawio file manipulation
• Shape support: Rectangle, ellipse, diamond, text, and connectors
• Japanese fonts: Noto Sans JP with proper sizing
• Export options: PNG, SVG, PDF via drawio-export CLI
• Style guide: Color palette, layout rules, and best practices

Installation (Claude Code)

Add Marketplace

/plugin marketplace add akiojin/skills

Install Plugin

/plugin install cli-design@akiojin-skills

Or:

/plugin install unity-development@akiojin-skills

Or:

/plugin install speckit@akiojin-skills

Or:

/plugin install github@akiojin-skills

Or:

/plugin install drawio@akiojin-skills

Or interactively:

/plugin
# Select "Browse Plugins"
# Choose cli-design, unity-development, speckit, github, or drawio

Installation (Codex)

Codex reads skills from folders under .codex/skills (repo or user scope). This repo also ships packaged .skill files under codex-skills/dist/.

Option A: Install from GitHub with skill-installer

# From GitHub repo/path
scripts/install-skill-from-github.py --repo akiojin/skills --path gh-pr --ref main

Option B: Unzip .skill into $CODEX_HOME/skills

# Example (PowerShell)
$dest = "$env:USERPROFILE\.codex\skills"
New-Item -ItemType Directory -Force -Path $dest | Out-Null
Expand-Archive -Path .\codex-skills\dist\gh-pr.skill -DestinationPath $dest -Force

# Example (bash)
dest="$HOME/.codex/skills"
mkdir -p "$dest"