# bytesize

- **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:** [Abdul wahab Sheik](https://cerebralvalley.ai/u/bytesize)
- **GitHub:** https://github.com/ABDULWAHAB-dev7/CAIRN-AI
- **Demo video:** https://youtu.be/fLEjqsIpIkU
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2631

AI can design a laptop. It can't take one apart, because it has object recognition but no object permanence: the screw it just identified is forgotten the moment it leaves the frame. Cairn is the memory layer, the safety kernel and the proof.

Cairn keeps a persistent, hash-chained log and object graph of every part (identity, place, state), flags a missing screw within seconds, enforces four safety rules in code that the model cannot override, and closes each job with an Ed25519-signed repair passport that anyone can verify from a QR code.

HONEST STATUS: everything in this demo is a replay of a SIMULATED teardown in the real app. SAM 3.1 found a laptop, screws, fan, cables and a circuit board on real photos, but not battery, drives, cover or memory, and Meta has refused our SAM calls since 3 Nov (billing), so perception on a real bench is unproven. The event log, object graph, safety kernel, verification checks, signed passport and verify page are real and tested.

0:00 The problem: AI can't take a laptop apart
0:32 Every part has an identity, and a screw goes missing
0:57 The safety stop and the wrong screw
1:20 Back from a 30-minute break
1:34 Close the job: signed passport and verify page
1:56 How it works
2:06 What is real and what is not

Code: https://github.com/ABDULWAHAB-dev7/CAIRN-AI
Live replay: https://cairn-ai-eta.vercel.app
Every claim, dated: https://github.com/ABDULWAHAB-dev7/CAIRN-AI/blob/main/docs/PROOF.md
Long explainer (5:36): https://github.com/ABDULWAHAB-dev7/CAIRN-AI/raw/main/docs/video/cairn-explained.mp4

Built with: SAM 3.1 (perception), Muse Wonder (agent that can only propose legal steps), Meta Model API.
Photo credit: "Laptop open servicing" by Solutionservice21, Wikimedia Commons, CC BY-SA 4.0 (https://creativecommons.org/licenses/by-sa/4.0). SAM boxes added.

Made for the Meta Global AI Developer Hackathon 2026.
#Cairn #MetaAI #SAM3 #RightToRepair #Ewaste

## More from Meta Global AI Developer Hackathon

- [Nextwaves Industries](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2628)
- [Team 7700](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2629)
- [Reneural](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2630)
- [BloodLife](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2632)
- [ChopSnap](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2633)
- [Parsewright](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2634)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2631. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt