Hardware Abstraction for Robotics: Connecting Sensors and Actuators
Hardware Abstraction for Robotics: Connecting Sensors and Actuators Introduction Robots interact with the physical world through hardware. Sensors p…
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The 3% Drop That Only Showed Up on a Clean Server: A Debugging Retrospective
My forwarder lost 3% of its messages. My laptop reported zero. CI reported zero. Staging lost thousands every hour. I blamed the network. I blamed t…
Pck3r is a modern package manager for Windows 10 x64
GitHub Pck3r: C++ Package Manager for Windows Pck3r is a modern package manager for Windows 10 x64, implemented in C++ for performance and modularit…
Mutation Testing as a Merge Gate for Agent-Written Tests
An agent patch that passes its own tests is a baseline, not a verdict. The same model wrote the code and the tests, so both share the same blind spo…
The Agent's Tests Passed. Mutation Testing Showed 2 of 4 Faults Survived.
The agent patch passed the gates I ran on it. Its unit tests were green, fixtures matched, nothing was flaky. Then I seeded four faults into the imp…
The Fix That Passed Review and Crashed in Release
The fix passed review. It still crashed in release. The reviewer was never tested. The reviewer was me. And an AI model. We both approved the same w…
The Coverage Loop: Turning Free AI Tokens into Verified C++ Tests
Unit tests are boring. Coverage is not optional. I asked a free AI model to write my tests. It failed. Then I built a feedback loop. Here is the res…
Fixing a Snapcraft Build that had been Broken for Two Years
As I stated in my introduction , the first piece of work I did on Packet Sender was fix the Snapcraft build. What is Snapcraft? It has been a while…
My GPU Database Lost to a Single CPU Thread. The Bug Was One Constant, 128x Too Small
This is a submission for DEV's Summer Bug Smash: Smash Stories powered by Sentry . I maintain a GPU SQL engine — a DuckDB community extension that r…
Why I Built a Windows Desktop App with C++ + WebView2 Instead of Electron
I'm building yyzTools , a Windows productivity suite with 40+ tools fused into one install. This is the architecture decision I get asked about most…
Flutter FFI: Integrating Native C/C++ Libraries
Flutter FFI: Integrating Native C/C++ Libraries Flutter applications sometimes need functionality that is already implemented in native code. Exampl…
Case Study: A Free Model Wrote a C++ Tree Hasher. The Reference Oracle Found Three Bugs.
Conclusion first: a free model drafted a working C++17 directory hasher in one pass. The draft compiled, ran, and was still wrong. A differential te…
Beyond OOP: Entity Component System schema for high performance
Object-Oriented Programming (OOP) taught a generation of software engineers to model complex domains by creating class hierarchies. In games and rea…
A Free Model Endpoint Proposed a Build Cleanup. My C++ Executor Required a Dry Run Before Touching State.
A model endpoint can return well-formed JSON, a whitelisted tool name, and a command that is still wrong for the current state of a repository. The…
Why Your Generated Tone Clicks, and How an Envelope Fixes It
If you have generated a pure tone in code and played it back, you may have noticed a small click at the start, the end, or both. The tone itself is…
In the Beginning...
Working with Modern AIs The day I met Claude was a dark day It was a full-stack project that I wasn't familiar with any of the tools being used. The…
A Free Model Endpoint Replied Twice, Then Went Silent. The Fix Was a C++ Replay Envelope, Not Retries
Late on a Tuesday, a C++ tooling team noticed their warning classifier was duplicating classifications. The batch runner sent forty compiler diagnos…
A Free Model Endpoint Returned 200 With an Empty Body. The Fix Was a Lease, Not a Retry.
A realistic failure mode starts with a team that runs a nightly triage job on a small free server. The job groups stack traces from three services.…
Building DeviceTrust: A Practical Approach to Android Fraud Signals
When we think about cyber attacks, we usually think about someone targeting a backend system or an API gateway, but in my experience with securing m…
What Building a C++ Benchmarking Suite Taught Me About "Simple" Data Structures
We all know the Big-O complexity of basic data structures. Arrays are O(n) for search. Hash maps are O(1). Linked lists are... well, complicated. Bu…
Design Notes for a Deterministic C++ Simulation Framework
“Same inputs, same result” sounds like a simple requirement. In a multithreaded simulation, it is an architectural constraint that touches data layo…
I Inherited 60,000 Lines of Undocumented C++. I Read It With an AI and Assumed Every Answer Was a Lie.
Three months ago a colleague left, and I inherited his project: roughly 60,000 lines of C++17, no design docs, comments that mostly said // TODO: cl…
DFlash Changes What Tokens per Second Means
I spent a night trying to fit a dense 30B model, 256K context, vision, and speculative decoding onto one 24 GB GPU. The fastest quant lost. The quan…
include-tidy: A Tool to Enforce Include-What-You-Use, Part 2
Introduction In a previous post , I described include-tidy (Tidy), a tool that enforces the include-what-you-use (IWYU) principle for C and C++ prog…
The Ultimate Chronicle of Over-Engineering the A+B Problem (POJ 1000)
A+B: When the Stars of Humanity Shined Dedicated to all the pioneers of "over-engineering" on the A+B Problem. Prologue: One Problem, Ten Thousand W…
A Race You Can't Reproduce Is Still a Race: Testing Model-Generated C++ Concurrency Fixes
In my last two posts I built a small grading loop for coding models on C++ tasks: compile the model's answer, run it, and score it. That worked fine…
PWMake -A C++ build system
Visit the code: github I hate CMake when I learned to write my first C++ program. I hate Visual Studio and Xcode too. So I decided to use clang and…
Target Data in GAS
What is target data and why should you use it Target data is an ability task in GAS used for sending certain data to and from the server. It's used…
Code Sfumato
sfumato , (from Italian sfumare , “to tone down” or “to evaporate like smoke”), in painting or drawing, the fine shading that produces soft, i…
Become an HPC Programmer in Seven Days!
I have published an English version of my online course, Become an HPC Programmer in Seven Days! English version: https://kaityo256.github.io/sevend…