To "code vibe" on Nostr, meaning creating a bot or a client with a specific personality or style, you would:

1. Pick a programming language like Python or JavaScript.

2. Use a Nostr library to connect to relays.

3. Design the "vibe": Decide if it's witty, helpful, artistic, etc.

4. Write code to generate notes (text, images, reactions) that reflect that personality.

5. Sign events with your private key and publish them to relays.