Anthropic switched to HTML artifacts from Markdown because they make internal...
https://spark-wiki.win/index.php/What_is_the_Claude_Side_Panel_Live_Preview_for_Artifacts_and_Why_Does_It_Matter%3F
Anthropic switched to HTML artifacts from Markdown because they make internal planning and code reviews clearer and faster. With HTML, they cut document rendering latency by 5x, boosting team productivity