I am trying to update my scripts to follow W3C Protocol for Appium tests.
Can't find which version of Appium java-client will automatically prefix "Appium" keyword to the capabilities.
I've found that starting from 8.0.0-beta Appium java-client forcibly converts capabilities to W3C format with adding appium: prefix to all unprefixed not defined in WebDriver W3C doc capability names.
8.0.0-beta2 is the latest available version which do this.
https://mvnrepository.com/artifact/io.appium/java-client/8.0.0-beta2
8.0.0-beta should also work.