# Souldbound

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Tolulope Shekoni](https://cerebralvalley.ai/u/wijnaldum)
- **GitHub:** https://github.com/ToXMon/soulbound
- **Demo video:** https://youtu.be/tDgY8KewvPg
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2680

Most AI characters forget you when the tab closes, and nothing proves what they "remember" hasn't been edited. SOULBOUND is a persistent voice-and-vision character with memory you can verify.

What works. You speak and the character answers, with spoken replies if you configure a voice endpoint. Follow-ups use room-local context: per speaker label, up to 20 turns or 8,000 characters, dropped when the room ends. Vision is explicit only. Nothing is captured until you click "Look at this". The browser then takes one frame, shrinks it, and stops the camera. One SAM 3.1 call and one or two Spark calls produce an observation and a mask outline, shown in the page and saved as a text-and-frame-hash record, never pixels.

Memory and proof. Spark extracts structured facts into a versioned private store. Sealed batches become Merkle roots committed to a Solana devnet program. Two roots (epochs 0 and 1) are on-chain now, and the /life page verifies an inclusion proof and rejects a tampered copy. A valid proof shows a record is in a committed history. It does not show the record is true.

## More from Meta Global AI Developer Hackathon

- [BugBuster](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2677)
- [Siyuan Song](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2678)
- [JSama](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2679)
- [GridTwin-HIL](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2681)
- [Nevermind](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2682)
- [XOF](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2683)

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