Give Windsurf Cascade a browser that survives the task.

Choose the right instructions

This page is for the legacy Cascade agent.

Current Devin Desktop documentation says Devin Local is the default agent for new Devin Desktop tabs. It uses Devin CLI configuration instead of the Windsurf-era Cascade file. For a new tab, follow the Devin Local browser MCP guide. Continue here only when the interface identifies the agent as Cascade.

Desktop Cascade setup

Add Hronaut as a user-level URL server.

Open Cascade's MCP settings and edit ~/.codeium/windsurf/mcp_config.json. The entry is available across local projects.

{
  "mcpServers": {
    "hronaut": {
      "serverUrl": "http://127.0.0.1:47812/mcp"
    }
  }
}

{
  "mcpServers": {
    "hronaut": {
      "serverUrl": "http://127.0.0.1:47812/mcp",
      "headers": {
        "Authorization": "Bearer ${file:/path/from-hronaut-home}"
      }
    }
  }
}

Windsurf plugin for JetBrains

Use the plugin's separate configuration file.

The Windsurf plugin for JetBrains documents the file ~/.codeium/mcp_config.json. Open Settings → Tools → Windsurf Settings → Add Server and use the same serverUrl entry. Its published guide documents environment interpolation but not token-file interpolation, so use the exact authenticated snippet Hronaut Home offers for your client rather than inventing a secret format.

Observable verification

Verify the connection in Hronaut and Cascade.