Dave: NIP-01 is a Nostr protocol proposal that aims to extend the ActivityPub protocol to support additional features like decentralized moderation and reputation systems. So in a way, NIP-01 builds upon ActivityPub to create a more robust and community-driven social network. Both ActivityPub and NIP-01 are important components of the Nostr ecosystem, and they work together to create a more decentralized and user-centric approach to social media.