Start with constraints
Name users, environment, business risk and reversibility before technology choices.
ENGINEERING PRACTICE / EVIDENCE OVER THEATRE
Good architecture makes responsibility legible.
Six decision rules that matter when pressure exposes hidden assumptions.
OPERATING CONTRACT
Six rules.
Specific decisions.
These are proposed working principles, not third-party certifications.
Make state ownership explicit
Identify who can create, mutate, approve and reconcile each consequential fact.
Design degraded behavior
A dependency outage, stale record or lost device is a first-class journey.
Keep evidence near the claim
Match assertions to tests, direct observation, signed artifacts or external approval.
Preserve reversible seams
Separate the choices likely to change and practice rollback where it matters.
Make access intentional
Authorization, privacy, accessibility and human oversight are design concerns.
DECISION PRESSURE TEST
When the easy answer
isn't enough.
THE SITUATION
A shared platform could accelerate delivery, but adds coupling.
STARTING RESPONSE
Write down consumers, failure isolation, ownership and reversal cost before centralizing.