# Seal

- **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:** [Anya Chueayen](https://cerebralvalley.ai/u/4nY4)
- **GitHub:** https://github.com/Aqta-ai/seal-payment-reference
- **Demo video:** https://www.youtube.com/watch?v=XUYxJSpqFBQ
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4961

Seal lets an AI payment agent handle changed instructions while keeping execution tied to a person’s exact approval.

Finance teams want agents to finish useful work. The difficult moment is when a supplier changes the amount or bank account after the original approval. Understanding that message should produce a new proposal, not new authority.

Our demo uses Meta Muse Spark Open through Baseten to read an invoice and a later supplier message. Muse cites the exact source lines, proposes the payee, account, amount and currency, and asks for clarification when needed. Seal shows what changed. A person reviews the exact revised details, then explicitly continues execution.

In our accepted hosted run, Muse recognised a EUR36.80 credit note and a replacement account against a EUR250,000 invoice. It proposed EUR249,963.20 and requested review. Approval alone left the ledger unchanged. Explicit continuation recorded one synthetic payment to the replacement account.

Reviewers can test the result themselves: verify the signed record, change one cent in a copy and see verification fail, then retry a completed payment and see repeat execution refused. One-use authority is checked and consumed in the same transaction as the simulated payment.

The event contribution combines Muse’s source-cited interpretation and clarification with a reviewable proposal, exact-value approval and explicit continuation. It builds on earlier Seal infrastructure and verifier work.

All documents and payments are synthetic. No bank is connected.

Try the demo: https://agent.aqta.ai/?view=run

## More from Meta Global AI Developer Hackathon

- [Asoncode](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4958)
- [lowbudget](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4959)
- [Jitterbug](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4960)
- [PhyloLoom-AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4962)
- [424 Devs](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4963)
- [Tolbert Innovation Hub](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/4964)

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