growth-skills

skills

Personal Agent Skills by Charles Green. Each skill is a folder containing a SKILL.md file that Claude loads dynamically when the task matches the skill's description. The same folders work in Claude Code (terminal), the Claude Cowork desktop app, Claude.ai, and the Claude API.

Skills in this repository

Skill	What it does
japanese-teacher	Japanese teacher for adult English-speaking learners at any JLPT level (N5–N1) — grammar, kanji, vocabulary, study plans.
japanese-translator	Japanese <> English translator and interpreter for business and personal contexts — keigo, technical translation, cultural localization.
persona-builder	Charles Green methodology partner for building rigorous B2B buyer personas and buying committees.
marketing-copy-auditor	Conversion-optimization auditor that scores B2B service/landing pages against eight best practices and recommends persona-specific rewrites.

Skills are grouped into two plugins in .claude-plugin/marketplace.json:

• japanese-skills — japanese-teacher + japanese-translator
• growth-skills — persona-builder + marketing-copy-auditor

Repository layout

.
├── .claude-plugin/
│   └── marketplace.json      # Claude Code plugin marketplace manifest
├── skills/
│   ├── japanese-teacher/
│   │   └── SKILL.md
│   ├── japanese-translator/
│   │   └── SKILL.md
│   ├── persona-builder/
│   │   └── SKILL.md
│   └── marketing-copy-auditor/
│       └── SKILL.md
├── LICENSE
└── README.md

Each skill folder follows the Agent Skills specification: a SKILL.md with YAML frontmatter (name, description) and Markdown instructions. Skills can later be expanded with helper scripts, reference docs, and assets in the same folder.

Install in Claude Code (terminal)

Register this repository as a plugin marketplace, then install whichever bundle you want:

# In Claude Code:
/plugin marketplace add charlesgreen/skills
/plugin install japanese-skills@charlesgreen-skills
/plugin install growth-skills@charlesgreen-skills

Or install interactively:

1. /plugin marketplace add charlesgreen/skills
2. Browse and install plugins → charlesgreen-skills
3. Pick japanese-skills or growth-skills → Install now

Once installed, just mention the task naturally — e.g. "Help me prep for JLPT N2 grammar" or "Build me an ICP for a security SaaS targeting CISOs" — and Claude Code will load the matching skill.

Install in the Claude Cowork desktop app

Cowork loads skills from your local skills directory, so the simplest workflow is:

# macOS / Linux
mkdir -p ~/.claude/skills
git clone https://github.com/charlesgreen/skills ~/src/charlesgreen-skills
ln -s ~/src/charlesgreen-skills/skills/japanese-teacher    ~/.claude/skills/japanese-teacher
ln -s ~/src/charlesgreen-skills/skills/japanese-translator ~/.claude/skills/japanese-translator
ln -s ~/src/charlesgreen-skills/skills/persona-builder     ~/.claude/skills/persona-builder

Restart the Cowork desktop app and the skills become available to every Cowork agent. Symlinking (rather than copying) means a git pull here updates Cowork immediately.

You can also install Cowork-side via the Claude Code workflow above — Cowork agents share the same Claude Code plugin runtime, so any plugin you install via /plugin install is also available inside Cowork.

Use via Claude.ai or the Claude API

• Claude.ai — upload an individual skill folder as a custom skill. See Using skills in Claude.
• Claude API — upload skills programmatically. See the Skills API Quickstart.

Creating your own skill

A skill is just a folder with a SKILL.md:

---
name: my-skill
description: Clear description of what this skill does AND when Claude should trigger it. Include the trigger phrases users will actually say.
---

# My Skill

Instructions Claude follows when this skill is active.

## When to use
- Concrete trigger 1
- Concrete trigger 2

## Guidelines
- Guideline 1
- Guideline 2

Two rules that matter more than they sound:

1. The description is the trigger. Claude decides whether to load the skill based on it, so describe both what it does and when to use it — including the phrasings users actually say.
2. Keep SKILL.md focused. Push long reference material into sibling files (e.g. reference.md, examples.md) and link to them from SKILL.md. Claude will read those on demand.

Drop the new folder into skills/, add the path to .claude-plugin/marketplace.json, and open a PR.

Further reading