I think IntelliJ generally has the feature to autocomplete code in markdown code blocks based on the current project. So that in itself is not a Copilot feature

I think IntelliJ generally has the feature to autocomplete code in markdown code blocks based on the current project. So that in itself is not a Copilot feature. It's really useful because it will even understand Angular2 codebases and autocomplete custom components in html snippets.