How to Write a Technical Design Document
Technical design documents (TDDs) — sometimes called design docs, RFCs, or tech specs — are one of the most valuable tools available to staff engineers. When done well, they create alignment before implementation, surface risks early, and create a durable record of why decisions were made. When done poorly, they’re ignored, debated endlessly, or written as formalities after the decision is already made. This post is about writing TDDs that work: getting the right people to the right decision with minimum friction. ...