Mayank RajAI platform engineering

Notes on building and operating production agentic AI systems — agent runtimes, realtime voice on constrained hardware, and the platform underneath them.

The Model Called a Tool I Never Gave It

Part one of two. What changes when the tools the model calls don't run on your servers — they run on a device in someone else's building, and it tells you what it can do.

27 July 2026 · 8 min read

Everything From a Client Is Untrusted, Including Hardware You Built

Part two of two. What it actually costs when the tool list arrives over the network from a machine you don't control.

27 July 2026 · 11 min read