Breaking Temporal Coupling: Design Beyond Sequence
Systems become fragile when correctness depends on invisible timing assumptions.
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Configuration: Separate Policy from Mechanism
If changing a setting requires changing code, your system is tighter than it needs to be.
Inheritance Tax: The Cost of Rigid Hierarchies
Inheritance feels elegant at first, but deep hierarchies often charge interest later.
Decoupling and the Law of Demeter: Talk Only to Your Friends
The less your code knows about its surroundings, the easier it is to change safely.
Reversibility: Design for Change
Design decisions should not trap you early, the best systems stay flexible long enough to learn what really matters.
The Essence of Good Design: Make Change Easy
Good design is not about being clever, it is about making change feel safe, simple, and routine.