Core Principle
Entity Identity and Surrogate Key Design
Why I moved from natural keys to surrogate keys, and why that change made both database design and application code easier to manage.
Design
Core Principle
Object-Oriented Thinking for Entity Design
Why inheritance is rarely used when designing entities in business systems.
Core Principle
Designing Meaningful Types
Explains how meaningful types help determine when inheritance is structurally appropriate.
Core Principle
Inheritance, Composition, and Meaningful Types
Explores when inheritance and composition fit naturally, and why meaningful types matter more than convenience.
Core Principle
Why Modern Developers Avoid Inheritance
Explores why many modern developers avoid inheritance, examining cultural, historical, and practical factors in business application development.
Core Principle
API Exception Mapping and Validation Strategy
How Cotomy treats API failures and validation through structured HTTP responses and exception mapping.
Core Principle
Inheritance and Composition in Business Application Design
A reflection on inheritance and composition from long-term business system development experience.
Core Principle
Form AJAX Standardization
Why Cotomy standardizes query-string search, AJAX submit, and shared form contracts to control long-term cost in business systems.
Core Principle
Page Lifecycle Coordination
Why Cotomy keeps page lifecycle and cross-form coordination in CotomyPageController instead of scattering ready logic across screens.
Core Principle
CotomyElement Boundary
A design-focused note on why Cotomy starts from CotomyElement and treats DOM handling as an architectural boundary, not a UI convenience API.
