@harnessa-fe/runtime

@harnessa-fe/runtime

Browser runtime client for Harnessa-FE. Captures DOM/console/network events and executes commands from the MCP server in the user's real browser tab.

Auto-injected by the Vite plugin / Webpack plugin — you typically install it as a peer of the plugin.

Install

pnpm add -D @harnessa-fe/runtime

What it does

• Connects to the MCP server via WebSocket on dev page load
• Streams console.*, fetch/XHR, window.error, unhandledrejection events
• Captures rrweb session recordings for replay
• Executes commands (page.click, page.type, page.dom_query, etc.)
• Renders the annotation overlay (point-and-task)

Disabled automatically in production builds.

Manual usage (advanced)

For non-Vite/Webpack setups:

import { RuntimeClient } from '@harnessa-fe/runtime';

const client = new RuntimeClient({
    projectId: 'my-app',
    wsUrl: 'ws://localhost:47729',
});
client.start();

Docs

• Root README
• Architecture

License

MIT