An engineer joins a new company. On the first day, someone hands them a 400-page architecture document. On the second day, an incident happens. On the third day, they are asked whether the system should use synchronous calls or an event-driven approach for a new feature. The architecture document is too long to reread. The incident post-mortem is still in progress. The decision is due by end of day.
Every engineer who has changed jobs has had this week. The question is not whether the pressure will come — it will. The question is whether you have a map that lets you navigate fast.
The nine frameworks are that map. This chapter shows how they fit together — not as a list, but as a system.
The twelve threads in the previous chapter are the vertical spine, running through every layer of the stack. The nine frameworks are the horizontal instruments — the lenses you apply at any layer to analyse what you are looking at, make decisions, and communicate those decisions clearly.