bazelbuild/starlark ? reverse-engineered prompt

Build me a clean open source project for the Starlark language, with the goal of explaining the language clearly and keeping the spec easy to maintain.

I want a site and repo that describe what Starlark is, why it exists, and how it behaves, with a polished README, a full language specification, design notes, and a few supporting docs for proposals and users. It should feel simple and readable, more like a language reference than a big app. Please include a small Python based doc generation tool if that helps keep the spec in sync, and add tests so the generated markdown stays correct.

Make the writing friendly and precise, since this is meant for people who want to understand or implement Starlark. If you need to check current docs or examples online, go ahead and look them up.