Muanjai (ม่วนใจ๋)

License and certificate expiry dates for small hotels and homestays live in paper folders and scattered spreadsheets. A missed renewal means fines — or worse, operating without a valid license.

Owners needed something that meets them where they already are: LINE chat, in Thai, with answers grounded in their own documents — not a generic chatbot guessing from training data.

The core is retrieval-augmented Q&A over Thai documents, built on NECTEC's Pathumma LLM running on ThaiSC supercomputing infrastructure. Uploaded documents are chunked, embedded, and retrieved at query time so every answer cites the owner's own paperwork.

Keeping retrieval and generation decoupled means the knowledge base can grow — new license types, new regulations — without retraining anything. The model answers in Thai, grounded in retrieved context.

Subscriptions are paid over PromptPay, Thailand's national real-time rail. The system verifies payment slips and scan-to-pay transactions automatically instead of routing them through a human admin.

Verification results feed straight back into the chat flow, so a user can go from expiry warning to paid-and-confirmed without leaving LINE.

LINE enforces a hard ~30-second reply-token window: miss it and the user gets silence. The webhook pipeline answers inside that window with concurrency caps, deadline guards, and a retry idempotency ledger so a retried delivery never causes a duplicate charge, reminder, or reply.

Critical failures — e.g. webhook error-rate spikes — push rate-limited alerts to an admin LINE account, so operators hear about incidents before users do.

Every change ships through cloud deployment with CI enforcing lint, type checks, and 240+ tests. Security practices are structural, not advisory: session secrets fail fast when missing, CORS origins are anchored, and proprietary code and customer data stay protected by pipeline policy.