I am reading KEEP75 and try to defined a script. but I can't find the @ScriptBody annotation, is It implemented ?

No, generating script into a method is not implemented yet.

It would be good to have same marks on what works and what is not. Or a separate document with the current state descriptyion. It is not easy to understand whay we can use not from KEEP.

It's mentioned here https://github.com/Kotlin/KEEP/blob/master/proposals/scripting-support.md#implementation-status