Don't Let the LLM Read Numbers Aloud: Where Rules Beat Models in a Voice Pipeline
This is Part 2 of Field Notes from a Korean Phone Voice Agent, a seven-part series about a project I led: a real-time Korean phone voice agent (STT → LLM → TTS) for a public-service call line. Part 1 covered how my STT evaluation misled me. This part is about the text around the LLM: numbers going in and out, names that STT gets almost right, and where an LLM call is worth its latency. ...