Installation

The collection ships as a plugin for both Claude Code and OpenAI Codex CLI, sharing the same skills/ directory. You can install it as a managed plugin or point your agent at a local clone.

Claude Code

Claude Code supports plugin marketplaces. The canonical reference is the Claude Code plugin docs.

You install the plugin directly from the public GitHub repository (github.com/DonHeidi/online-writing-skills) — no local clone required. Add the repository as a marketplace using its HTTPS URL, then install the plugin:

/plugin marketplace add https://github.com/DonHeidi/online-writing-skills.git
/plugin install online-writing@online-writing-marketplace

Claude Code clones the repository for you (you don’t need a local copy) and reads .claude-plugin/marketplace.json from the default branch.

Use the HTTPS URL, not the owner/repo shorthand

Claude Code also accepts the GitHub shorthand /plugin marketplace add DonHeidi/online-writing-skills, but it clones over SSH (git@github.com:…), which only works if you have a GitHub SSH key configured. The HTTPS URL above works on any machine — a public repo clones without authentication.

You can also browse and install interactively:

/plugin

To update later:

/plugin marketplace update online-writing-marketplace

From a local clone

If you prefer a local checkout you can keep up to date with Git:

mkdir -p ~/skills
cd ~/skills
git clone https://github.com/DonHeidi/online-writing-skills.git

/plugin marketplace add ~/skills/online-writing-skills

OpenAI Codex CLI

Codex CLI also supports skills and plugins. This repository ships a Codex manifest at .codex-plugin/plugin.json and a repo-scoped marketplace at .agents/plugins/marketplace.json, both pointing at the same shared skills/ directory. The canonical reference is the Codex skills docs.

Clone the repository, then browse and install from inside Codex:

git clone https://github.com/DonHeidi/online-writing-skills.git

/plugins

Alternatively, Codex discovers skills directly from .agents/skills/ (repo) or ~/.agents/skills/ (personal). Symlink or copy the skills/ directory into one of those locations if you want skill-level discovery without installing the full plugin.

Use the skills directly

You do not need a plugin runtime at all. Clone or download the repository and tell any capable agent to inspect it and set the skills up for your project. The important thing is that the agent can see the skills/, references/, and CONFIG.md files.

Set context first

The skills are heavily affected by project context. Without purpose, content buckets, and especially voice/tonality, output may sound generic or sales-driven. Run the discovery skills before producing content. See Getting Started.