Notes from the build.

A 47 KB payload met a 32 KB limit in production. How we framed the problem, compared four ways to fix it, and why Redis was the right call.

An honest accounting of splitting a pipeline into an async Go worker and a sync Python API: what the pattern buys you, what it really costs, and when not to do it.

A practical, point-by-point guide to how I use TDD in real projects: what it is, why it helps, and how to start without overthinking.