Notes from the build.

Everyone ships quickly now. What separates software that lasts is everything speed tempts you to skip.

Scoring free-form English to the official band descriptors, consistently, at exam pace — the problem, the decisions, and what it does in production.

Turning a raw transaction trail into an organized financial picture on Android, with nothing typed by hand.

On keeping judgment human in an AI build: what a model should never decide, and how to make that a rule instead of a hope.