In writing Closure: The Definitive Guide, I created my own browser-based text editor that stored a simple version of a document as HTML in Google Docs that was used to generate the DocBook XML for the actual manuscript. This tool provided the right balance between a markup language that requires a compilation step and a WYSIWYG editor that makes it easier to visualize the document as it is being written. Overall, this made it easier to focus on generating a first draft without getting lost in formatting details. Originally, the editor was implemented as a Firefox extension generated from a Chickenfoot script, but this project ports that work to a web application that runs on AppEngine.