Capstone: Hardening a Payment Flow

Seven lessons, seven patterns. Now let's find out if they're 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, because each fix creates or exposes the next problem. That chain is the deepest lesson in this module: reliability patterns aren't independent tools. They're a system with its own internal logic.

For each stage, read the incident and stop at the diagnose prompt

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