How to Install and Use the building-an-exo Skill

Navigate to the Resource Hub on the OpenExO platform.

Filter resources by Resource Type and select Skill. You should see the ExO 3.0 Claude Skill card appear in the results.

Click Access Content on the skill card. You will land on the resource detail page with a full description and a Download Resource button.

Click Download Resource. A file named building-an-exo-skill_v20.skill will be saved to your computer (usually to your Downloads folder).

The .skill file extension is the format Claude uses for packaged skills — do not unzip or rename it.

Open the Claude desktop app. In the left sidebar under the Chat tab you will see Projects, Artifacts, and Customize. Click Customize.

The Customize Claude screen offers two paths: Connect your apps and Create new skills. Select Create new skills.

On the Skills screen, click the + icon in the top-left to open the Create skill menu.

Hover over Create skill, then choose Upload a skill from the submenu.

In the Upload skill dialog, drag and drop your building-an-exo-skill_v20.skill file into the upload area, or click to browse and select it.

Claude will read the SKILL.md inside the package and register the skill.

You will be taken to the building-an-exo skill page. Check that:

• building-an-exo appears under Personal skills in the left rail
• The toggle in the top-right is switched ON (blue)
• The Trigger row shows Slash command + auto
• The description matches the ExO 3.0 / Intelligence Stack / REWRITE Playbook summary

If all four are true, the skill is live and ready to use.

At the top of the Claude app, switch from Chat to Cowork. You will see the “Let’s knock something off your list” landing screen.

In the prompt box, type something like:

Hey Claude please use the “building-an-exo” skill to analyse my company. All the relevant documents are in the project folder.

Before sending, click the Work in a project dropdown at the bottom of the prompt box.

You will see your existing projects, plus Create new project and Choose a different folder.

Click Create new project. You will be offered three options:

• Start from scratch — set up a new folder with instructions and files
• Import a project — bring an existing Chat project over
• Use an existing folder — point Claude at a folder you already work from

Pick whichever fits your situation. For most first-time users, Start from scratch is the simplest path.

On the Start a new project screen:

• Name the project (for example, ExO Analysis — Acme Corp)
• Optionally add instructions telling Claude how you want it to work in this project
• Drop the company documents you want analysed into the Add files area
• Confirm the project location on your computer, then click Create

Once the project opens, send your prompt. The building-an-exo skill will trigger automatically and walk you through ExO 3.0, the Intelligence Stack, and the REWRITE Playbook against your real documents.