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AIOctober 202612 min read

WhatsApp AI Agent Indonesia: UMKM Order Bot with Agents SDK

A customer-service and order-taking agent for an Indonesian small business on the WhatsApp Cloud API: signed webhooks, stock and price tools, one session per phone number, Bahasa Indonesia prompts and a human handover, all designed so replies stay inside the free service window.

DevOpsSeptember 202611 min read

Build Gates: Architecture Rules a README Cannot Enforce

A written convention has no way to fail. Here is how I turned three architecture rules on this site into prebuild scripts that break the build, what each one cost, and the gate that passed cleanly while hiding 168 wrong dates.

AISeptember 202612 min read

Bahasa Indonesia LLM Token Cost: 1.23x, Not 2-3x, Measured

Indonesian prompts really do cost more tokens than English. I measured how much on 20 matched pairs, and the widely repeated 2-3x figure is not it.

AISeptember 202613 min read

RAG Bahasa Indonesia: Postgres Full-Text Search Misses Docs

Postgres 16 ships an indonesian text search config that keeps every stop word and mis-stems me- verbs. What I measured on 16.11, and the SQL that fixes it.

AISeptember 202613 min read

Speech-to-Text Bahasa Indonesia in Production: Real Whisper WER

Every published Indonesian word error rate belongs to a benchmark. Here are the real numbers, why code-switching breaks every model, and what self-hosting costs.

AISeptember 202612 min read

How ChatGPT Astra Built My 3D Portfolio Game, Step by Step

A 1,015-line PRD, six gated phases and a headless screenshot loop: how ChatGPT Astra built The Archipelago, a React Three Fiber portfolio game, and the bugs only a test could see.

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