Architecture Decision Records: A Working Guide
Use concise architecture decision records to capture context, options, consequences, and revisit triggers so teams can understand design choices later.
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Architecture Styles and Patterns: A Practical Guide
Compare layered, hexagonal, event-driven, and service architectures using boundaries, deployment needs, failure modes, and a concrete selection method.
Architecture Fitness Functions as Executable Guardrails
Turn architecture principles into executable fitness functions that check dependency rules, performance limits, and deployment constraints as systems evolve.
Behavioral Patterns: Organize Collaboration
Compare all eleven GoF behavioral patterns by the change they isolate, the coupling they reduce, and the runtime costs they add to a system in real code.
Choosing, Combining, and Removing Patterns
Choose GoF patterns by tracing change pressure, comparing direct code with pattern roles, and removing abstractions when maintenance costs exceed their value.
Class Diagrams for Design Conversations
Use a compact UML class diagram to discuss ownership, multiplicity, and dependencies in object-oriented designs before those choices harden into code.
Clean and Onion Architecture: Keeping Policy at the Center
Compare clean and onion architecture, learn how concentric boundaries keep policy independent, and apply dependency rules with practical code and trade-offs.
Concurrency, Immutability, and Shared State
Learn how shared mutable objects race, when immutability helps, and how ownership, locks, and atomic operations keep concurrent application state correct.
Creational Patterns: Control Object Creation
Compare five creational patterns, see a compact TypeScript example, and choose the simplest fit for product families, construction, copying, or shared state.
Design Review: Trade-Offs and Maintainability
Review object designs for change, coupling, cohesion, tests, performance, operations, and security using a worked example and the practical checklist.