Workfront UI extensions on App Builder

A customized Workfront UI, built as an App Builder app. It has two halves:

• a front end — the screens the user sees. Built with React/Spectrum (Adobe's UI toolkit); in App Builder terms it's the SPA ("single-page app"). → workfront-ui-extension
• a back end — small functions that run in Adobe's cloud (Runtime actions; "serverless" = you write the function, Adobe runs it, no server to manage). They hold the credentials and call the Workfront / Planning / Adobe APIs. → workfront-actions

The front end plugs into Workfront at fixed spots called extension points: a Main Menu button, an item in an object's left panel, or a widget embedded inside a custom form.

End-to-end flow → which skill