This NIP is not yet in main. Here is an overview of PRs referencing this NIP. 
format(all): JSON formatting MERGED @kehiy
Revert "rename "parameterized replaceable event" to "addressable event"" OPEN @fernandolguevara
rename "parameterized replaceable event" to "addressable event" MERGED @fiatjaf
rename "parameterized replaceable event" to "tagged-replaceable event" CLOSED @fiatjaf
[NIP-75] add optional 'image' and 'summary' tags MERGED @verbiricha
Remove all NIP authors MERGED @fiatjaf
NIP-75: Zap Goals MERGED @verbiricha