Here is an example of adding a feature to the Elmish Contacts project:
The new feature is a games list that allows the user to enter any games that the contact plays. To integrate this feature I looked at how the email feature was implemented into the code and based my changes off of that.
Here is a comparison of the original and the changed version: https://github.com/CMThre3/ElmishContacts/compare/master...CMThre3:feature-sample