Set up in Cowork

Cowork uses a graphical setup rather than slash commands. These steps walk you through adding the Chucks marketplace, installing the plugin, and enabling its connector so Claude can actually call the monster-database tools.

1. Open Customize

In the Cowork sidebar, click Customize.

2. Start adding a marketplace

Next to Personal plugins, click the + button, then choose Create plugin → Add marketplace.

Cowork sidebar with the Create plugin menu open and Add marketplace highlighted

3. Paste the marketplace URL

In the dialog that appears, paste the marketplace URL and click Sync:

https://github.com/chucks-ai/claude

Add marketplace dialog with the Chucks repository URL pasted in

4. Install the plugin

Open the plugin directory, switch to the Personal tab, find the Chucks card, and click its + button.

Plugin directory with the Chucks card on the Personal tab

5. Enable auto-sync

At the top of the directory, click the … menu next to the chucks marketplace pill and turn on Sync automatically. This keeps the plugin up to date as we ship new tools and fixes; without it, you'd need to come back and click Check for updates by hand.

Marketplace pill menu with the Sync automatically toggle

6. Activate the connector

Installing the Plugin doesn't connect Claude to the monster database — you have to activate the Connector yourself. In the Customize sidebar, expand Chucks under Personal plugins and click Connectors. On the chucks card, click Install. The right pane stops saying “You are not connected to chucks yet” once the connection succeeds.

Cowork Customize panel with the chucks Connectors tab open and an Install button on the chucks connector card

7. Try it

Open a new Cowork chat and ask Claude to build you an encounter. The encounter-builder Skill kicks in when your prompt looks like an encounter request, and Claude calls the connector for the monster data.

Stuck? See your first encounter for a full worked example, or prompting tips for getting better results.