Topic

2. Core Concepts

what you are building now. The deep technical vocabulary — orchestration vs choreography, event contracts, the three messaging patterns, process nesting, trust envelopes. This is the category that builds the long-term reference value. Readers come back to it. It is what gets cited.

The Event Contract Is the Only Boundary That Matters

Why the schema of what your system publishes is more architecturally significant than the framework it runs on, the database it uses, or the team that built it. There is a thought experiment worth doing before designing any distributed system. Imagine you need to replace one of your services completely.

Orchestration and Choreography Are Not Opposites

They operate at different levels of the same system. Choosing between them is a false dilemma that produces worse architectures than understanding why both exist. Every serious distributed systems discussion eventually arrives at the same question. Should we orchestrate or choreograph? The canonical answer is that you should pick one

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