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

https://victor-wiki.win/index.php/What%E2%80%99s_inside_SKILL.md_for_html-artifacts_-_any_good_heuristics%3F

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