Event sourcing and event-driven architecture share a word and almost nothing else. One is a persistence strategy, the other a communication style, and conflating them leads to bad designs.
When the spec is the source and the agent is the compiler, drift becomes the new bug class — and every classical role has to retool around it.
A practical look at when event-driven patterns solve real problems, and when they add unnecessary complexity.
Why each microservice should own its data store, and the real costs of enforcing that boundary.
How to maintain a traceable record of architecture decisions that satisfies compliance requirements without drowning your team in documentation.