# How to watch an agent build a model live in the open app with solidcraft

Repo: [tangency-labs/solidcraft](https://github.com/tangency-labs/solidcraft) | Difficulty: Intermediate | Time: 45 minutes | Basis: From the README

Connect the MCP server to your running SolidCraft window so you can see each modeling step as the agent makes it.

**Who it is for:** Builder who wants to supervise an agent instead of trusting a headless run

**The problem:** A headless agent gives you only a final file, so you cannot catch a bad step as it happens.

**The outcome:** You watch the agent's commands appear in the app and can stop or correct it mid-build.

## Steps

1. Open the SolidCraft desktop app.
2. Register the server: claude mcp add solidcraft -- solidcraft-cli mcp
3. Configure the server with the --connect option described in docs/mcp.md so it drives the running app.
4. Give the agent a modeling task and watch the timeline fill in.

## Prompt to paste into your agent

```text
Connect to the running SolidCraft app via its MCP server as described in docs/mcp.md and build <simple part> step by step. After each step, tell me what feature you added so I can follow along.
```

## Caveat

The exact flags for connecting to the running app are in docs/mcp.md, not the main README, so read that page before setting it up.

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URL: https://dedupedai.com/use-cases/tangency-labs-solidcraft/watch-an-agent-drive-the-live-cad-app/