How to Install the Copywriter Claude Plugin (Cowork & Code)

Don't want to install anything? You don't have to. The free web tools for copywriters on The AI Career Lab give you the same pre-built workflows in your browser — five runs a day on a free account, no terminal, no install. Create a free account if you'd rather skip straight to the tools.

The Copywriter Claude plugin from The AI Career Lab is the fastest way to turn Claude into a copywriting-aware co-worker. It bundles 4 pre-built slash commands and 2 auto-activating skills that already know what working copywriters actually do — brand voice extraction, long-form drafting with discipline, sales page copy with restraint, and email sequence generation — so you stop writing prompts from scratch every time you draft routine copy.

The plugin works in both runtimes Claude offers:

• Claude Cowork — the chat product at claude.ai. The easiest path. No terminal, no install of anything else. Requires a paid Claude plan (Pro, Max, Team, or Enterprise) to access plugins.
• Claude Code — the terminal CLI for power users and developers. Requires Node.js + npm. Free or paid Claude account both work.

This guide walks through the install in five minutes for whichever runtime you prefer. No coding background required either way.

What this plugin gives you

A normal Claude session is a blank chat window. You type what you want, Claude responds. That works, but it puts the burden of prompt engineering on you, and the output quality varies based on how much detail you remember to include — especially the discipline rules (no AI tells, no invented stats, no hype) that separate AI-assisted copy from generic LLM output.

A plugin replaces that loop with slash commands — pre-built shortcuts that already contain the structure, formatting rules, and copywriting conventions for a specific task.

In this plugin you get:

• /brand-voice — extracts a structured brand voice doc from a client's real writing samples
• /long-form — drafts long-form articles with a clear angle, H2 structure, and [CITATION NEEDED] flags instead of invented statistics
• /sales-page — PAS-structured sales page copy with restraint (no fake urgency, no hype, no invented social proof)
• /email-sequence — Welcome, Nurture, Launch, or Winback sequences with subject lines, preview text, and bodies

Which runtime should you use?

Use Claude Cowork if:

• You already use claude.ai for chat work
• You prefer a graphical interface to a terminal
• You don't want to install anything else on your machine
• You have a paid Claude plan (Pro, Max, Team, or Enterprise)

Use Claude Code if:

• You're already comfortable in a terminal
• You want to use Claude alongside other tools (especially if you're a copywriter who also does light dev work or scripts your own workflows)
• You're on a free Claude account (Claude Code plugin install does not require a paid plan)
• You want the option to script and automate workflows around the plugin

The plugin commands and skills are identical across both runtimes.

Path A: Install in Claude Cowork (easiest, no command lines)

Claude Cowork is entirely UI-based. You don't type any slash commands to install plugins — you click.

1. Open claude.ai in your browser and sign in.
2. Make sure you're on a paid plan (Pro, Max, Team, or Enterprise). The plugin marketplace is gated to paid plans.
3. Open the plugin settings and click Add marketplace.
4. In the modal, paste this into the URL field:

alexclowe/awesome-claude-cowork-plugins

5. Click Sync. Claude Cowork pulls the marketplace catalog from the public alexclowe/awesome-claude-cowork-plugins repo.
6. Browse the marketplace. Find the Copywriter plugin and click Install.

That's it. The commands and skills are now available in your Cowork chats.

Path B: Install in Claude Code (terminal CLI, two commands)

Claude Code is the terminal CLI for Claude. It's free (no paid plan required for plugin install) but requires a one-time setup if you've never used it before.

One-time Claude Code setup

1. Install Claude Code. Open a terminal and run:

npm install -g @anthropic-ai/claude-code

If you don't have npm, install Node.js first (download the LTS version, run the installer).

2. Sign in once. Run claude in your terminal and follow the sign-in flow.

Install the plugin

Inside Claude Code, run these two commands:

/plugin marketplace add alexclowe/awesome-claude-cowork-plugins
/plugin install copywriter@awesome-claude-cowork-plugins

The first command registers the marketplace catalog; the second installs the Copywriter plugin by name. You only need to run marketplace add once.

To verify, type /help and you should see the new commands listed alongside Claude Code's built-ins.

Your first command

After install, the most useful command to try first is the one that unlocks every other workflow:

/brand-voice

When you run it, Claude asks for the client's name, industry, audience, 2–4 paragraphs of the client's real writing samples, and the voice preferences (what it should feel like, what it should avoid). The output is a structured brand voice doc — voice pillars, tone by context, vocabulary, anti-patterns, plus a pre-publish checklist.

Upload that doc to your Claude Project for that client and every subsequent draft you generate comes back in the right register without ten rounds of editing.

First 4 workflows to try after install

Once the plugin is installed, these are the workflows worth running this week:

1. Brand voice doc — /brand-voice in the plugin, or /tools/copywriter-brand-voice on the web. Run this first
2. Long-form article draft — /long-form in the plugin, or /tools/copywriter-long-form on the web. With the brand voice doc loaded, the draft comes back significantly closer to ship-ready
3. Sales page copy — /sales-page in the plugin, or /tools/copywriter-sales-page on the web
4. Email sequence — /email-sequence in the plugin, or /tools/copywriter-email-sequence on the web

Skills you get for free

This plugin also includes Claude Skills that activate automatically when you're working on relevant tasks — no command required, no extra prompting:

• Brand Voice Adherence — keeps drafts aligned with the brand voice doc loaded in your Claude Project, resisting the default LLM voice
• Claim Discipline — flags claims that need citations rather than inventing plausible-sounding statistics

Skills are the part of the plugin that makes Claude feel like a co-worker who already knows your craft. The first time the claim-discipline skill auto-activates and flags [CITATION NEEDED] instead of inventing a "78% of B2B buyers..." statistic, you'll understand the difference between using Claude generically and using Claude as a copywriter's co-worker.

Where to go from here

Once the plugin is installed and you've run your first command, the next thing to do is set up Claude as a real co-worker — not just a one-off command runner. That means giving it your brand voice doc, your house style, and the references it should cite.

• Claude Cowork playbook for copywriters — the full setup guide with the prompt structures behind the slash commands. Useful for customizing the commands for your house style
• Free web tools for copywriters — the same workflows in your browser, no install required
• Best AI Tools for Copywriters in 2026 — the broader landscape including Claude, ChatGPT, dedicated brand voice tools, and SEO research tools
• AI for Copywriters guide — the working playbook for staying in the loop as junior posting volume contracts

Common issues

I don't see the "Add marketplace" option in Claude Cowork. You need to be on a paid plan (Pro, Max, Team, or Enterprise). Plugin install is gated to paid plans in Cowork. If you're on a free plan, install via Claude Code instead — it's free.

The marketplace sync failed in Claude Cowork. Double-check the URL field has exactly alexclowe/awesome-claude-cowork-plugins — a GitHub owner/repo format, no https://, no trailing slash. Click Sync again.

The Claude Code marketplace add command failed. Make sure Claude Code is updated to the latest version (npm install -g @anthropic-ai/claude-code will update it). The plugin marketplace feature is built into recent versions.

The slash commands aren't showing up after install. Start a new chat (Cowork) or type /help (Claude Code). If you see the built-in commands but not the new ones, the install didn't complete — re-run the install.

I want to use this without installing anything. Use the free web tools instead. Same workflows, browser-based, no install or paid plan.

Ready to try it without installing

If neither install path is appealing for a first try, the free web tools for copywriters give you the same pre-built workflows in your browser — five runs a day on a free account.

Create your free AI Career Lab account and try the copywriter tools today. No credit card required.

---

This article is general guidance for copywriters. AI-generated content and disclosure obligations vary by jurisdiction and platform. The FTC's Endorsement Guides are a useful reference for advertising claims in the US.