I've been frustrated by markdown previews that don't support all the features of Pandoc Markdown, so I created a VS Code extension that uses Pandoc itself to create the preview. This includes full bidirectional scroll sync and math support via KaTeX.This also includes support for Codebraid, which can execute code blocks and inline code in Pandoc Markdown to embed code output. Code can be executed with Jupyter kernels or Codebraid's own built-in code execution system.