Capstone: Hardening a Payment Flow

1. How This Capstone Works

Seven lessons, seven patterns. Now we find out whether they are a checklist in your head or a system you can actually compose. This capstone runs one payment flow through seven incidents, in the order they really happen to real teams. Why that order? Because each fix creates or exposes the next problem. That chain is the deepest lesson in this module. Reliability patterns are not independent tools. They are a system with its own internal logic.

For each stage, read the incident and stop at the "pause and decide" prompt