Here's the Tweet that kicked off the Twitter thread where the BIP351 spec was announced:

Private Payments: an improved BIP47, has just landed as BIP351 🎉

• Reusable payment codes
• No static notification address
• Payer and payee privacy
• Uses a single OP_RETURN payload for wallet recovery (per recipient)

https://github.com/bitcoin/bips/blob/master/bip-0351.mediawiki

https://twitter.com/clarkmoody/status/1575641075296837632 [Nitter]

That Tweet was shared in this post:

Private Payments: an improved BIP47, has just landed as BIP351 #75524