Overview
Design pattern implementation fails when patterns are applied because they're recognized design vocabulary rather than because they solve a specific problem. A repository pattern applied to a system that will never swap data stores adds an abstraction layer with no benefit. A factory pattern applied when there's only one concrete type will always be instantiated adds code without addressing the problem factories solve.
The Design Patterns Implementation Framework selects patterns based on the specific problems they solve, implements them correctly, and identifies when a simpler approach is better than the pattern.
Key Features
Pattern selection guide with "when NOT to use"
Repository with both production and test implementations
Strategy with runtime selection logic
Typed event emitter with unsubscribe return