Vibe coded a Nostr bookmarking app. It's very basic, but I learned a lot in the process. Check it out at

Pinstr - Bookmarks on Nostr

A decentralized bookmark manager built on Nostr protocol (NIP-B0). Save, organize, and share your favorite web pages securely.

Pete and I also recorded a podcast episode about the experience

KP016: Bookmarking on Nostr - Key Pair

Two developers exploring Bitcoin, Lightning, and Nostr to build user-empowering apps