This sounds pretty reasonable, is easily readable, and I suppose this should be the main URL.

The idea is to use the browser as the dev environment, all of it: emulate a file system, run non-JS tools compiled to WASM on top of it, and access networking via the browser, too. For Node-based development, this sounds rather doable.

It is nice, but not totally free or open source:

"WebContainers rely on hosted proxies and server-side acceleration to enable truly instant development environments. By obtaining a WebContainer API license, your business can gain access to higher API rate limits, uptime reliability, and a range of benefits designed to help you maximize the potential of the WebContainer API in your organization.

Licensing is required for production usage of the API in a for-profit setting (feel free to prototype as much as you like without a license). If you're using the API to meet the needs of your customers, prospective customers, and/or employees you need a license to ensure continued access to the API as you scale.

"