# Vouch

- **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:** [Johan de Beer](https://cerebralvalley.ai/u/JohandeBeer)
- **GitHub:** https://github.com/Johan-de-Beer/vouch-audit-evidence-agent
- **Demo video:** https://github.com/Johan-de-Beer/vouch-audit-evidence-agent/releases/download/v0.1.0/vouch-build-demo.mp4
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1086

Vouch — Every claim, backed by pixels.

Auditors must trace a purchase from a ledger entry through its invoice, purchase order and goods received note, then retain the basis for each conclusion. Vouch brings those documents, control results and source pixels into one review workspace. Every supported finding links to a visible crop; uncertain evidence stays in a human review queue.

The original contribution built during 29 October–3 November 2026 is the coordinated evidence workflow: document ingestion/rendering, crop-linked controls, blind crop rereads, confidence gates, bounded retries, named review decisions, notes, file/event integrity checks and portable PDF/HTML/ZIP working papers. Arithmetic and matching run deterministically across nine controls, including amount, VAT, quantity, duplicates and signature presence. The intended benefit is easier evidence navigation and review; no measured time saving is claimed.

The public source passes 50 tests and production Docker CI. A fictional dataset of 25 ledger rows and 75 documents passes all 225 expected fixture controls and contains five planted scenarios. These are labelled pipeline checks, not model-accuracy measurements. A separate real Meta run processed one row and three PDFs but left all nine controls unverified because confidence or crop agreement was insufficient. The demo discloses that limitation. Vouch is a prototype supporting auditor judgment, not an audit opinion or a claim of production readiness.

## More from Meta Global AI Developer Hackathon

- [RestaurantOS AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1083)
- [BenchMate](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1084)
- [Velohud](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1085)
- [OnboardIQ](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1087)
- [jobseekers](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1088)
- [CRYPTOR.AGENCY](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1089)

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