Recent blog posts have been experimenting with executable formats, allowing writers to transform their raw Markdown files into different formats for cross-posting. One such example is a Haskell program that converts Markdown to a new format for posting on various platforms. In a second take, the author improved this solution by adding a Lua filter to process Markdown links and image sources. This update aims to include the base URL of the blog in rendered links and images.

Source: https://dev.to/vst/executable-blog-posts-second-take-1dkn