Why Your LLM Calls Need a Circuit Breaker: A Lesson from Last Party 🔌
Carnival time has begun. 🎉 We are organizing a house party, and if you are in and around Bangalore, you are invited. Just one condition: Don't be late…
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Important Design Patterns in a Nutshell
When building complex software systems, writing code that simply "works" is not enough. As systems scale and requirements evolve, poorly structured ob…
Simple Factory, Factory Method, Abstract Factory — Which One Do You Need?
The Problem You're building a system that supports multiple databases — MySQL, PostgreSQL, MongoDB. Different services in your application need to cre…
Never Create an Invalid Object Again — The Builder Pattern
A real story from building a manuscript submission system at a scientific publishing company. We were building a system at a Publishing Company that a…
The Ideal Cart: 5 Design Patterns That Earn Their Keep (and 2 Refused)
It all starts with a review question. I was reworking my notes on the Design Patterns book , the Gang of Four one, with examples that all came from th…
Stop Editing Working Code: Understanding the Open/Closed Principle in Python
Every time a new requirement arrives, do you find yourself opening the same function and adding another elif block? If yes, your code may be signaling…
The Factory Pattern: Simplified
The Problem You're building a system that supports multiple databases — MySQL, PostgreSQL, MongoDB. Different services in your application need to cre…
Making ServiceLoader usable: a provider factory
I keep coming back to java.util.ServiceLoader . I have used it to put a JSON layer behind a contract, so the core code carries no direct dependency on…
Environments Are Not Features
I wanted a sandbox. Not the decorative kind. Not the one where production data wears a fake name tag and hopes nobody notices. A real sandbox. One whe…
Design Patterns in Ruby #2: Observer Pattern
Applications often need to react when something changes. When a user signs up, you might want to: Send a welcome email Create a user profile Log the a…
Composition over Inheritance
C++ has a lot of double-edged swords. These features abstract the process of turning the sharp edge on yourself, so that you can destroy yourself with…
Builder Design Pattern - Simplified
A real story from building a manuscript submission system at a scientific publishing company. We were building a system at a Publishing Company that a…
Enterprise Design Patterns in Python: Repository & Unit of Work — Real-World E-Commerce Example
Enterprise Design Patterns in Python: Repository & Unit of Work 🐍🏗️ Series: Enterprise Application Architecture | Source: Fowler's EAA Catalog | C…
AI Added Caching to Your Code — And Quietly Polluted Your Business Logic
Originally published at recca0120.github.io Ask AI to add caching to your code, and it will. The result looks clean — cache logic extracted into a sep…
Introducing the ArchUnit Checker for the Clprolf Framework
One of the most interesting aspects of architectural frameworks is not the rules themselves, but the ability to verify that those rules are actually b…
Benevolent Viruses — A Design Pattern for Ethical AI
Last month I ran an outreach campaign. I emailed 25 people — researchers, advocates, technologists — the kind of humans who think about how AI should …
The Repository Pattern and AQC — Part 1 of 3: Cleaning Up the Internals
The Series This is the first article in a three-part series on migrating from a traditional Repository Pattern implementation toward Atomic Query Cons…
Language-Agnostic Code Generation: The Driver Plugin Model
TestSmith generates test scaffolds for five languages: Go, Python, TypeScript, Java, and C#. Each language has its own project structure conventions, …
Singleton Design Pattern in Java — From Naive to Thread-Safe
What is the need for Singleton Pattern ? Let's say we need to connect to DB and for every request if we keep creating a new Instance of Db connection …
Swift Protocol Magic II: Designing a Reusable Location Tracking System
How to stop rewriting CLLocationManager boilerplate in every screen — and design something your future self will actually thank you for.* If you've sh…
Hexagonal Architecture is Not a Layered Architecture: Topology, Safety, and When to Walk Away
Most introductory articles draw it as an onion Every article about Hexagonal Architecture ends up with the same diagram: three concentric circles. Dom…
Flutter Actions (mutations)
One-shot operations as first-class state, with declarative listeners. More in Github . An Action is a tiny piece of reactive state that represents a s…