Six ProcScript surprises from 60 Uniface services
Over the last two rounds of the series Building a customer app in Uniface 10 , the app grew by about 60 service operations: pipelines, owners, conta…
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Batch .bat in 2026: Legacy Glue, Not a Personality
I still write .bat files in 2026. I also refuse to build an identity around them. That distinction— legacy glue vs personality —is the retrospective…
Building a tested calculator in the Uniface 10 IDE
Uniface is one of those tools you rarely read about, but that still runs a surprising amount of business software. I work with it regularly, and I w…
Python beside Delphi, not instead of it
I maintain an ERP that runs a footwear factory. It is a Delphi VCL desktop application: 488 units, roughly 160,000 lines of Object Pascal, sitting o…
I Tried to Recreate a 2008 .NET Developer With AI. I Broke My Own Experiment 4 Times.
I wanted to know whether AI can understand legacy code. Not compile it. Understand it. The problem: real legacy systems don't come with an answer ke…
AI-LMC Phase 00 — I just wanted to make easy money with AI, so obviously I'm now building a legacy app from scratch 🐼 (Part 1)
I want to make money with AI. Ideally, easy money. To put it more precisely: I want to hand as much as possible to AI, and do as little as possible…
The Smallest Safe Change: Refactor a Messy Function One Step at a Time
The biggest refactor failures come from big steps. A 200-line function turns into a rewrite. The rewrite ships with a regression. The fix is to make…
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…
Stop Rewriting Legacy Systems: Use AI to Understand Them First
TL;DR: AI should not help us rewrite legacy systems faster, it should help us understand them better, modernize them safely, and design stronger arc…
Japan Set a Government Deadline for Its Legacy Code. It Was Last Year.
Every engineer has met a cursed codebase. The file nobody edits without a small prayer. The function with a comment that says "DO NOT TOUCH" and no…
Why Legacy Rewrites Need a Judge, Not a Better Prompt
Lately I keep getting asked about legacy replacements. It's become one of the more common conversations I have, and the framing is almost always the…
AI Can Migrate Your COBOL to Java. It Can't Prove It Didn't Break Anything. We Built the Part That Does.
Every bank, insurer, and government system running on a mainframe today is sitting on COBOL that nobody wants to touch and nobody can afford to leav…
Modernising a legacy AS/400 (IBM i) system without rewriting it
Many companies still run production, warehousing, orders and invoicing on a business system that has been going for twenty years or more on an AS/40…
I built a CLI that scans legacy codebases and generates a modernization plan
How I turned the pain of inheriting legacy systems into an open-source framework that produces structured diagnostics — tested on real production co…
5 prompt engineering techniques to get the best out of a legacy project
Have you ever been at a situation where you have been recently hired to maintain a legacy project, an important project at your company, but the pre…
C++ Crash Pattern S5 — Race‑Condition Crashes: How to Diagnose and Fix Them
Why race‑condition crashes only appear under specific timing, vanish under debugging, and produce different stack traces on every run. Race‑conditio…
AI Can Migrate Code. Who Validates That the Business Still Works?
Before modernizing legacy systems with AI, assess your verification capacity. Migration requires testing, observability, human judgment, and methodo…
Diagnosed with Stage 3 Cancer
I was diagnosed with stage 3 cancer. Surgery is scheduled for December 31st. Last day of 2020. Fitting. I'm not going to use this space for medical…
How To Use AI Safely In Legacy Codebases
You've inherited a system that nobody wants to touch. It's ten years old. There are class files with three thousand lines. The naming convention cha…
S1 — Clean Backtrace Crashes: How to Diagnose and Fix Them
In the overview article Crash Patterns Overview: A Practical, Symptom‑First Guide to Debugging C++ Crashes , we introduced the two‑layer crash model…
Before it comes down, what should be saved from the International Space Station?
What went up cannot all come down (for museum display).
Beyong New and Delete: from auto_ptr to unique_ptr
This guide walks through a legacy pattern built around std::auto_ptr , something still found in many older C++ codebases. The pattern usually involv…
Mythos Found a 27-Year-Old Bug in OpenBSD. Your Code Is Next.
Anthropic's new Mythos Preview surfaced a 27-year-old vulnerability in OpenBSD — the most-audited operating system in commercial software — and gene…