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

https://yenkee-wiki.win/index.php/How_do_I_add_interactive_UI_elements_to_an_HTML_artifact_without_making_it_huge%3F

Anthropic switched to HTML artifacts for internal planning, code reviews, design systems, and reports because they load 5 times faster than Markdown files. This speed boost helps the team stay efficient and responsive when reviewing detailed docs