Strangling Procedural Legacy PHP into Laravel
The big bang rewrite is the most confident decision an engineering team can make and one of the worst. The pitch is always reasonable. The current s…
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Your thresholds do not belong in constants
Every tuning change needed a code review, a release, and a week of store rollout. So we stopped tuning, which is the worst possible outcome. Eightee…
A library is a basis. App code is coefficients. Refactoring is a change of basis. I use compression and sparse coding to pin down what actually counts as a "new idea" — and why frequency, not drama, earns one.
A Psychological State is a Coefficient Vector Richard Emate Richard Emate Richard Emate Follow Sep 23 A Psychological State is a Coefficient Vector…
Characterization Tests First, Then the Smallest Safe Change
Characterization Tests First, Then the Smallest Safe Change Stop refactoring. Start recording. The smallest safe change wins only if you can prove n…
Mainframe Migration Tools: What Works and What Fails
Every mainframe migration begins with someone searching for mainframe migration tools, and every vendor demonstration that follows looks remarkably…
My duplicate-code detector flagged the check I had just written. I deleted the duplication, not the rule.
A detector in my build looks for repeated code shapes. It caught a ten-line window shared between two checks that I had written deliberately, days a…
Mainframe Modernisation: Rewrite, Refactor or Replatform
Mainframe modernisation is rarely a single decision. It is a choice between several distinct strategies, each with a very different cost, timeline,…
COBOL to C# Migration - A UK Enterprise Guide 2026
COBOL still underpins a vast amount of the software running in UK banks, insurers, public sector bodies, and large retailers. Much of it processes m…
Automated Enterprise Code Refactoring Platforms: The 2026 Landscape
Refactoring at enterprise scale is a different discipline from refactoring in an IDE. Renaming a method across one service is a right-click; retirin…
COBOL to Rust Migration - A UK Enterprise Guide 2026
Rust is an increasingly popular COBOL migration target for organisations that want both memory safety and high performance without a garbage collect…
[Go in Practice] Writing Modern Go with AI: Testing JetBrains go-modern-guidelines and Refactoring a 1,039-line main.go
Background In the AI era, even I delegate most of my code optimization or writing tasks to AI. However, due to factors in model training data, too m…
COBOL to Python Migration - A UK Enterprise Guide 2026
COBOL powers an estimated hundreds of billions of lines of code still running in global financial systems, government infrastructure, and enterprise…
The CSS Problem Nobody Thinks Is Solvable
James Coombs is a design engineer who migrated a large frontend from Material UI to a custom design system (Radix, Tailwind). Four CSS systems had t…
Your Migration Guide Is Already Wrong
James Coombs is a design engineer who replaced a migration guide with 49 JSON data files and a handoff playbook. Engineers on four other teams migra…
Letting AI refactor one legacy stylesheet
The patient: one legacy Sass file The target was a legacy client CSS file: about 1,200 lines of hand-written Sass from before Tailwind was standard…
Three Attempts to Refactor a Large Flutter State Class — and the Final Solution
A step-by-step record of refactoring an 800-line State class. What do you do when your State grows beyond maintainability? 1. When Do You Know It's…
Refactoring OpenTelemetry Metrics: from God Class to Per-Subsystem Modules
The constraint that shapes everything A refactor that recently landed in a codebase I work in replaced our metrics god class with per-subsystem modu…
[Перевод] Экономическая выгода рефакторинга в эпоху AI-агентов
Осваивая разработку с помощью AI-агентов, я написал веб-приложение для собственной ежедневной работы. Проект получился довольно сложным: с динамичес…
I put my entire CRUD in one React hook. It felt efficient. Then it wasn’t.
They say every bad decision comes from a good intention. I'd say it comes from good intentions… and a little lack of thinking things through. This i…
The Problem with AI-Generated 'Shadow' Duplication
AI agents are incredible at writing functions. They're even better at accidentally duplicating your entire business logic without you realizing it.…
The Field Took Twenty Minutes
"Just add a field? It's a 20-minute job." We've all said it. And three days later, you're still knee-deep in a labyrinthine codebase, the ticket is…
Reducing Complexity: Replacing Entity-Based Services and Repositories with Purposeful Layers in Software Design
Introduction: The Prevalence of Entity-Based Patterns Walk into any mid-sized software project today, and you’ll find the same architectural bluepri…
How to Rewrite Your Software System Without Stopping Your Business
Originally published at spectredev.xyz . Cross-posted here for the Dev.to community. Planning a system rewrite? Learn the strategies that let you mo…
AI Code Refactoring: Why Testing Still Matters
Quick Answer: While AI agents can rewrite or refactor thousands of lines of code in hours, generating the code is only half the battle. Verifying th…
When One Enum Is Secretly Two
I was one commit away from a bug that would never have thrown an error. My system keeps every closed vocabulary in a single file — one source of tru…
The Singleton Labyrinth
Play the game first: voku.github.io/DevLabyrinth/ It teaches the problem faster than another architecture sermon ever could. You enter a labyrinth.…