モジュラモノリスで表現する複雑なドメイン領域と境界
https://scalamatsuri.org/ja/proposals/J14
PofEAAで読み解くSaaSバックエンドの現場のコード
https://scalamatsuri.org/ja/proposals/J26
The Clean Architecture
https://blog.cleancoder.com/uncle-bob/2012/08/13/the-clean-architecture.html
Freer Monads, More Extensible Effects
http://okmij.org/ftp/Haskell/extensible/more.pdf