This NIP is not yet in main. Here is an overview of PRs referencing this NIP.
draft of NIP-34: decentralized wikis OPEN @fiatjaf
add relay sets kind to nip-51 OPEN @fiatjaf
Nip 51 extended kind 30001 MERGED @gzuuus
merge nips 12, 16, 20 and 33 into nip 01 MERGED @fiatjaf
Specifies a hide keyword tag into Mute Lists OPEN @vitorpamplona
Categorized Custom Emojis List OPEN @SnowCait
New specification for NIP-51 to accept curated articles (edited from NIP-24 proposition for topics) OPEN @mostafa-khaldi
Implement Markdownlint GitHub action OPEN @mariano-perez-rodriguez
Markdown improvements, embelishments, and standardizations CLOSED @mariano-perez-rodriguez
fix typos MERGED @mattn
fix grammar and typos MERGED @vivganes
Update all NIPs to include 'depends' and 'mentions' tags OPEN @blakejakopovic
NIP-51: remove self-referential links MERGED @jiftechnify
NIP-51 Lists MERGED @monlovesmango