System Architecture Harness

Overview

Turn an idea, requirement set, existing codebase, incident pattern, or migration goal into an evidence-backed architecture that can be implemented, operated, reviewed, and evolved.

Core principle: Architecture is a chain of explicit decisions under constraints—not a diagram, a technology list, or a collection of fashionable patterns.

Non-Negotiable Architecture Law

NO ARCHITECTURE DECISION WITHOUT:
1. a requirement, invariant, risk, or constraint that motivates it;
2. at least one realistic alternative;
3. a stated trade-off and consequence;
4. a way to validate the decision in production or before launch.

A component without a responsibility is decoration. A database without access patterns and consistency semantics is guesswork. A queue without delivery, ordering, retry, and replay semantics is an outage waiting for a date.