chaibuilder/sdk — reverse-engineered prompt

Build me an open source React website builder that I can drop into an existing app and use to create web pages visually. I want a clean drag and drop editor where someone can add sections, edit content, style things with Tailwind, and preview what they’re building without needing to code every page by hand.

It should work well with modern React projects, especially Next.js, and have a simple SDK style setup so developers can control where the page data is saved and how the finished blocks are rendered. Please include support for custom blocks or components, a basic theme system, import HTML if possible, and an AI panel for helping generate or edit page content.

Keep the experience focused on landing pages, marketing sites, and letting non technical people manage page content. Make it polished enough to demo, with sensible defaults, clear examples, and documentation for how to integrate it. Look up current docs online if you need to.