Install on Cowork

Cowork is the no-terminal way in. It’s a mode inside the Claude desktop app built for non-developers, and it’s perfect for the research, strategy, and copywriting half of the toolkit. The whole install is point-and-click.

What Cowork can and can’t do

Cowork is great for research, personas, ad copy, sales letters, strategy decks, and reviews. It can’t yet render finished ad images or video, or build and deploy full pages, because of a sandbox limit — the asset skills hand you finished prompts instead, and you can run those on the desktop app later. For rendering, use the Claude Code desktop app. Full breakdown on Choose your setup.

New feature — labels may move

Plugin support in Cowork is new and the exact button labels can shift between app versions. The self-serve path below was verified click-for-click in June 2026 — but if a menu looks different, look for the nearest equivalent (“Plugins”, “Add marketplace”, “Add from a repository”). If you get stuck, the Claude Code desktop install is the guaranteed fallback — same toolkit, same skills.

Before you start

You’ll need:

• The Claude desktop app (Mac, with Windows rolling out).
• Your Claude login.
• A free GitHub account, added to the private toolkit repo (see Step 1).
• About 10 minutes.

Step 1: Get access to the toolkit

The toolkit is private, so you need to be let in first.

1. If you don’t have one, create a free GitHub account at github.com.
2. Send your GitHub username to your admin.
3. They add you to the unicorn-marketers/um-toolkit repository. Accept the email invitation GitHub sends you (check spam if it doesn’t arrive in a minute).

Step 2: Open Cowork

1. Open the Claude desktop app and sign in.
2. Switch to Cowork mode using the mode selector at the top of the window.

You should see the Cowork workspace: a chat bar with a folder picker, and a left sidebar that includes Customize.

Step 3: Add the toolkit

Path A is the route for everyone — verified click-for-click in June 2026 and it works on personal Claude accounts (which is what the roster uses). Path B only exists on Claude for Work (Team/Enterprise) workspaces; skip it unless your whole team is on one.

Path A — Personal plugin (self-serve, verified)

1. In the left sidebar, click Customize.
2. Next to Personal plugins, click the “+” icon.
3. Hover over “Create plugin” — a submenu appears — then click Add marketplace.
4. Click Add from a repository.
5. Select um-toolkit from the dropdown. Cowork lists the repositories your connected GitHub account can reach, so there’s nothing to type. If GitHub isn’t connected yet, it will ask you to sign in first (GitHub’s secure sign-in — no token to copy). Make sure you connect the same GitHub account that accepted the repo invitation.

You should see the ”+” menu with Create plugin, then the Add marketplace dialog, then um-toolkit appearing in the repository dropdown.

um-toolkit not in the dropdown?

The dropdown only shows repos your connected GitHub account can access. Two things to check: (1) you accepted the GitHub invitation to unicorn-marketers/um-toolkit (Step 1), and (2) you connected the right GitHub account — if you have more than one, disconnect and reconnect with the invited one. Still missing? Ask the repo admin to install the Claude GitHub App on unicorn-marketers/um-toolkit, or install on the desktop app instead.

Path B — Organization plugin (Claude for Work workspaces only)

This path requires a Claude for Work (Team/Enterprise) workspace — personal Claude accounts don’t have an Organization settings area, so if you’re on your own subscription, use Path A. If your team IS on Claude for Work, a workspace admin:

1. Opens Organization settings → Plugins → Add plugin → GitHub.
2. Adds unicorn-marketers/um-toolkit.
3. Installs the Claude GitHub App on the repository when prompted (this is what lets Cowork sync a private repository at the organization level — it also enables automatic updates for the whole workspace).

After that, um-toolkit appears in every member’s Customize → Plugins list — find it and click Install/Enable.

Step 4: Install the toolkit

1. With the marketplace added, find um-toolkit in the plugin list.
2. Click Install.

You should see um-toolkit move into your installed/enabled plugins with its version number (2.3.1 or later).

That’s it. All 19 skills are now available.

Step 5: Connect a folder for your work

Cowork saves your files into a folder you choose on your computer.

1. In the chat bar, click Work in a folder (or set it under Customize).
2. Pick or create a folder, for example UM Work on your Desktop. This is where your brand files and finished work will live.

You should see the folder name appear in the chat bar — every file the toolkit writes lands inside it.

Step 6: Confirm it worked

Just ask Cowork:

“What um-toolkit skills can you use?”

If it lists skills like apollo, hermes, and persona-architect, you’re installed.

Step 7: Set up your brand

Now teach it about your brand so everything sounds like you, not generic AI. In the chat, run:

/um-toolkit:getting-started

➡️ Full walkthrough: Onboard your brand (about 8 minutes).

Keeping it updated

In Customize → Plugins, open the marketplace and click Update to pull the latest version. If your admin set the toolkit up as an organization plugin (Path B), they can turn on automatic syncing for everyone — see Updating. Your brand files are never affected by updates.