It&#x27;s Read the Docs - you can switch between versions at the bottom left.<p>Plus more generally it is a pre-1.0 product which, while having a go live licence, means it isn&#x27;t for everyone especially if you&#x27;re not happy potentially doing some digging through code to work out undocumented features.<p>The OP doesn&#x27;t say if they are a C# dev or a Ruby dev or neither. To be honest that is likely to be the biggest driver of things. Both are good enough that it isn&#x27;t really worth paying the price of switching between two ecosystems for.