Anthropic switched to HTML artifacts for internal planning and code reviews...

https://www.slideserve.com/aaron_ward92/what-s-a-practical-html-artifact-layout-for-a-code-review-with-3-findings

Anthropic switched to HTML artifacts for internal planning and code reviews because they load 5 times faster than Markdown files. This speed boost means teams can review designs and reports without waiting, keeping everyone in sync. Plus, with 4