Testing & QA

My wife convinced me to finally ship the app we’ve been using for years

My wife and I have been using a shopping list app I built for ourselves for a few years now. Not because I'm a genius product designer. Not because I …

Real-Time Anomaly Detection Engine for a Cloud Storage Platform

I built a Python daemon that watches incoming HTTP traffic in real time, learns what "normal" looks like, and automatically blocks attackers using Lin…

I wanted jq with memory, time ranges, and filters. So I built logdive

Your app is in production. Something broke at 2am. Your options are: grep through a rotated log file, squinting at terminal output. Chain together hal…

The payments inversion — building a Lightning revenue-share loop where the app pays the user

In the last post I argued that Stripe — and the card network underneath it — can’t serve certain payment shapes, no matter how good the developer expe…

How I'm running an autonomous Claude Code loop on a real shipped product

type.win is a Balatro-styled typing arcade I built — two games, a leaderboard, live on Cloudflare Workers. The interesting part isn't really the game,…

I built 14,000 lines of code before talking to a single user. Here's what I learned.

10 weeks ago I was convinced I was building something nobody else had. The idea: a GitHub App that reads every changed Python function in a PR, infers…

Catching Hackers with Math: How I Built a Self-Healing Server

If you’ve never worked in cybersecurity before, the word "DevSecOps" sounds intimidating. It sounds like you need to be in a dark room wearing a hoodi…

skill-tree: finding the Claude behaviors you systematically avoid

After months of daily Claude Code use, I ran my session history through Anthropic's AI Fluency Index taxonomy and found I'd triggered 8 of the 11 obse…

Why iPhone Videos Silently Fail as Telegram Video Avatars

The Silent Failure Nobody Explains I was setting up a Telegram video avatar and uploaded a recent iPhone clip. No error, no feedback, just the upload …

🚀 LearnArc — Pay-Per-Use AI Learning Platform

In this hackathon, we built LearnArc, an AI-powered education platform designed to make learning more flexible, affordable, and accessible — especiall…

I Built a Suite of 6 Financial Tools in My Browser Stack — Here's the Architecture

I Built a Suite of 6 Financial Tools in My Browser Stack — Here's the Architecture KashVector is live. Six free, client-side financial tools at kashve…

Stop undercharging: I built an AI pricing co-pilot in MeDo

Most freelancers I know lose money on every project. Not because they're bad at their craft, but because they're bad at pricing. BuiltWithMeDo I see i…

I built a competitor pricing monitor in 3 days, here's how it actually works

I lost a deal last month. Prospect told me my competitor had dropped their pricing two weeks earlier. Found out during a live demo. Looked completely …

How I built an AI crypto trading dashboard in a weekend with Replit + Base

A practical breakdown of CoinHawk: what it does, how it's wired, and what surprised me along the way. I've been trading crypto on the side for about t…

Building a Free Instagram Editor with Svelte 5, WASM, & Llama 3.1

Hello DEV community! 👋 Building a web-based graphic editor usually means wrestling with HTML5 Canvas or heavy WebGL libraries. But what if you could b…

Remade the 1991 Classic "Gorillas" in Python—and Survived the Snapcraft Journey

The Nostalgia Hit 🍌 Remember the two gorillas standing on a skyline, tossing exploding bananas at each other? I decided to bring that back. I built a …

🦞 GitHub PR Watchdog — Never Let a PR Go Cold Again

Challenge: OpenClaw Build Showcase Category: Developer Productivity / Automation The Problem If you've ever juggled multiple open pull requests, you k…

Frontend and Backend of client #3 finally deployed to their respective cloud hosting providers! Now to test it..

How I Built a Full-Chain Cross-Border Purchasing System — From 1688 to Global Doorstep

A deep dive into the architecture behind Taocarts: an all-in-one SaaS platform that automates reverse-shopping from Chinese e-commerce to the world. T…

I created an app to help humans understand AI generated code.

A few years ago I could keep up with the pull requests my team shipped in a week. Not skim. Actually read. Follow the logic, notice the shortcuts, rem…

I built a token cost tracker for Claude Code - and it changed the way I think about AI development

It started with a number I couldn’t explain A few months ago, I looked at my Anthropic billing dashboard and saw a number that didn’t add up. I knew r…

I built a browser daemon for AI coding agents because Playwright wasn't enough

The problem I use Claude Code on Windows — Anthropic's coding-agent CLI that runs alongside my editor. It drives my codebase through a pipeline of exe…

Adding Realistic Drop Shadows to Product Images with the PixelAPI Shadow Generator

A few months ago I was building a product listing page for a small Shopify store. The client had decent product photos — white-background PNGs, cleanl…

I automated my entire job search with AI — here's the full stack I built

I automated my entire job search with AI — here's the full stack I built Manual job searching is genuinely miserable. You open LinkedIn. You scroll. Y…

Pixeliro Chrome Plugin Has Run Production

Check it: https://chromewebstore.google.com/detail/pixeliro-%E2%80%94-design-intelli/hnfochibcejkpjapbcpipkinaapeamda CSS color sniffer · Live theme i…

Aximo — a local Rust STT API for CPU-only inference

I built a local speech-to-text API in Rust that runs on CPU I recently built Aximo, a self-hosted speech-to-text microservice designed to run locally …

Built Gova, a declarative GUI framework for Go

I spent the last few months building Gova. It is a declarative GUI framework for Go that compiles native desktop apps to a single static binary on mac…

Building The World Now: six months of stack notes

About six months ago I started The World Now as a side project, an attempt to build a news site where the pipeline is mostly automated but the editori…

A MIDI Player That Shows You the Sheet Music and Lets You Play Along on a Virtual Piano

Most MIDI players are just glorified MP3 players with a progress bar. You hit play, you hear music, and that's it. But what if you actually want to se…

We Built an AI Comic Generator in 3 Sprints — Here's What Actually Worked

We Built an AI Comic Generator in 3 Sprints — Here's What Actually Worked A month ago, my project partner Qingyang and I set out to build something th…