Bhavtosh Rath's Blog

Part 2 of the value-router series: why a routing decision is only half the story, and what a lightweight decision log and calibration check reveal about who actually gets the expensive path.

A routing pipeline that decides fast-path vs. slow-path treatment for retail items using both estimated difficulty and estimated value — and an eval that shows why difficulty alone is the wrong signal to route on.

I built a researcher-strategist-executor agent pipeline that personalizes item serving from simulated clicks — with every decision logged and explainable. Here is how it works, and what the eval numbers actually said.

Summarizing how Netflix leverages in-house LLMs to deliver highly personalized recommendations.