[Pharo-users] A playground for Markdown?

Hi, Playgrounds are a really good way to write short snippets of code and I wonder if such experience could be extended for larger pieces of Markdown. What I'm thinking of is have something similar but  like this: 1. Support for Markdown instead of Smalltalk, including syntax hightlighning and tab behavior (a tab equals two spaces). 2. Clicking on urls should load the respective web page. Clicking on images should  show an image preview. That's it, to start with. At some point it could be using GT Documenter previews, font support and so on. But I would like to start by extending the playground to just support this two features. Any advice about where can I start for the first feature? Thanks, Offray