The PRNG draw-tape: eager versus lazy
Munchausen makes one absolute promise: same seed, same data, forever, on any machine. A persona is "generated once," which raises a question that soun…
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The bugs I could only find by running the thing
Last week I wrote about being bad at discipline and building a tool to compensate — ArDD, a set of Claude Code skills that push a project through arti…
Clearing an off grid price bug out of Polymarket's order path
This is a submission for DEV's Summer Bug Smash: Clear the Lineup powered by Sentry . Project Overview Polymarket ships a unified Python SDK, py-sdk ,…
I Built 4 Interactive Engineering Tools You Can Run in Your Browser
Most engineering concepts live in textbooks and MATLAB scripts — you read about a Fourier transform, a PID loop, or a constellation diagram, but you r…
About that 'your 997 says rejected but not why' problem...
Somebody on Reddit posted about 997s that just say AK5*R*5 — one or more segments in error — no AK3 , no AK4 . Preach. That's the problem this free do…
I Built a Self-Hosted AI Incident Diagnosis Tool That Only Returns a Root Cause When Multiple Diagnoses Agree
Most AI incident diagnosis tools will happily produce a root cause even when the evidence is weak. Argus takes a different approach. When an anomaly f…
How I built a lightweight standalone behavioral anti-stealer to protect my Windows environment
Hey everyone, Tired of bloated corporate solutions eating up hundreds of megabytes of RAM just to monitor active local connections, I decided to build…
macOS Tahoe has built-in clipboard history — here's what it's still missing for developers (2026 update)
Updated July 2026, after macOS 26.1 expanded the retention options and WWDC 2026 showed where macOS 27 is headed. Apple shipped a meaningful addition …
How I Built an Ultra-Fast, Programmatic Results & GPA Portal for My University (MUET)
At Mehran University of Engineering and Technology (MUET), Jamshoro, results are traditionally announced via large, static PDF tables. But the main is…
One Tap, Public URL: Building an Android App for Secure Port Forwarding
As developers, we've all been there. You have a web server, API, dashboard, or IoT service running locally, and you need to share it with someone outs…
I built a behavioral analytics tool for app builders — here's why and how
Every solo developer hits the same wall eventually. You ship something. You get users. Then one by one, they quietly disappear. No error in your logs.…
Escaping the Stateless Trap: Building a Context-Aware Support Agent
Most people think building a support chatbot is about generating human-like text. It isn’t. The real problem is memory. Or more specifically, the comp…
Building RandomVerse: A Premium React Native App
Many developers think Expo is only for prototypes or simple apps. I wanted to prove that it can also power a polished, production-quality mobile exper…
SilentShare — A Browser-Based Peer-to-Peer File Sharing App
Have you ever been in a computer lab, classroom, or office where you needed to quickly send a file between your phone and laptop? I run into this prob…
I Built an AI-Powered CLI That Migrates Legacy Java Code to Java 17/21/25
I Built an AI-Powered CLI That Migrates Legacy Java Code to Java 17/21/25 If you've spent any time in enterprise Java, you know the feeling. You open …
It works on my machine, but is it working for my users?
Every time I shipped something, the same thought hit me a few hours later: It works on my machine. It works in staging. But is it actually working for…
# Production Patterns for AI Agent Tool Calling: 8 Lessons from 6 Months of 24/7
Production Patterns for AI Agent Tool Calling: 8 Lessons from 6 Months of 24/7 Operation Getting an LLM to call a tool once is easy. Getting it to cal…
I shipped an LLM efficiency + security kernel — and deleted my own best idea
Six months ago I set out to make LLMs "smarter" by orchestrating many of them together. I measured it. It didn't work. Here's what I shipped instead —…
I Finally Built the Dev Opportunity Radar Website ❤️
This is a submission for Weekend Challenge: Passion Edition 📌 TL;DR I found this challenge on the very last day, so I knew I probably wouldn't finish …
I built MargIQ to learn which AI workflows actually need expensive models
Stop treating every AI workflow the same: optimize models where it actually matters Most AI applications make one model decision for the entire produc…
How I Built Prokaash: A Dynamic NFC Business Card Infrastructure From Scratch
Hey developers! 👋 I'm excited to share my latest full-stack project that I’ve recently completed—Prokaash. It is a modern, dynamic NFC business card …
Codegraph
How I Built CodeGraph: A Living Knowledge Graph That Tells You What Breaks Before You Break It Built for HACKHAZARDS '26 — powered by Neo4j AuraDB, tr…
Architecture-first vs problem-first: what five months of over-engineering looks like
Why build something? And what if nobody ends up using it? There are good answers to the first one. You build because you need a thing that doesn't exi…
Building PathFindr: An AI-Powered Campus Navigation App with Expo and Sarvam AI
Navigating a large university campus can be overwhelming, especially for new students, visitors, and even returning students attending classes in unfa…
I open-sourced AEGIS: a self-hosted, flow-first personal AI orchestration platform
For the past year I've run most of my day on a system I built for exactly one user: me. Last week I open-sourced it. It's called AEGIS, it's MIT-licen…
ArborDb: a Rust document store where reading one field doesn't get slower as the record grows
Most embedded document stores make you pay the same price to read one field as to read the whole record: they deserialize the entire value, then hand …
PromptLedger v0.7 — Turning prompt evaluation into local regression gates
Devlog — Part 6 PromptLedger v0.7 is out. The previous release made prompt history easier to inspect. This release makes prompt changes easier to eval…
I made an iOS app called Simmerz
Under the Hood: Why We Built an AI-Powered App Optimizer for React Native & Apple OS Runtimes Optimization is usually the last 10% of the developm…
Introducing InterceptX: The Ultimate Modern Alternative to ModHeader
Introducing InterceptX: The Ultimate Modern Alternative to ModHeader for HTTP Modifications As web developers, API engineers, and security auditors, w…
I built a TypeScript CLI framework for teams. I'd love your help making it better.
Hi! I'm Manel. Over the last several months I built Tyr, a TypeScript-native CLI framework designed for internal team tooling. It started as my final …