# Kadai Khata

- **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:** [Silambarasan N](https://cerebralvalley.ai/u/Silambarasan)
- **GitHub:** https://github.com/silambarasan-sh/kadai-khata
- **Demo video:** https://youtu.be/7q-KBMmyffA
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1565

Kadai Khata is an AI-assisted udhaar (credit) ledger for Tamil Nadu kirana shop owners, who today track customer credit in paper notebooks. The owner types or speaks a Tanglish sentence (for example "Ravi-ku aanju nooru rooba udhaar kuduthen") or photographs a handwritten notebook page, and Meta models turn it into structured ledger drafts. The AI never saves anything: every draft appears on a review slip with deterministic checks (overpayment, new customer, unusual amount, ambiguous name match), and only the owner's Confirm writes to the ledger.

Features: Tanglish text parsing with tool calling (several entries per sentence), voice input with an owner-reviewed transcript, notebook-photo digitising with a per-column total check against the totals written on the page, payment reminders in Tamil, Tanglish or English whose amounts are verified against the database, a read-only balance question, and a collections agent that proposes who to remind today. The agent can only read the ledger; a deterministic verifier recomputes every number it claims, and each run is stored in a hash-chained trace that can be replayed offline.

It is a mobile-first web app with an English/Tamil toggle, a live demo on fictional data, 161 automated tests (147 offline, 14 browser), and honest LIVE / MOCK / FALLBACK labels on every output. Limitations (small evaluation sets, voice script drift, ephemeral demo disk, no authentication) are documented in the README.

## More from Meta Global AI Developer Hackathon

- [Master AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1562)
- [Aunova](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1563)
- [Ardhi](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1564)
- [Dev-Senpai](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1566)
- [Project CAD](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1567)
- [Flamers](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1568)

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