This NIP is not yet in main. Here is an overview of PRs referencing this NIP.
NIP-28: use parameterized replaceable event for channel metadata OPEN @jiftechnify
Add recommended relays set OPEN @earonesty
Fix docs from kind0 to kind33 MERGED @earonesty
Idea, add "name" tag to channel create CLOSED @earonesty
Implement Markdownlint GitHub action OPEN @mariano-perez-rodriguez
Markdown improvements, embelishments, and standardizations CLOSED @mariano-perez-rodriguez
Update all NIPs to include 'depends' and 'mentions' tags OPEN @blakejakopovic
NIP28: Make explicit that root event tag is compulsory MERGED @cj-chua
NIP-28 Add missing comma's in tags MERGED @thesimplekid
NIP-28: Public Chat MERGED @ArcadeCityMayor