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A few years ago, I thought I knew what I was doing. I had just finished building a full‑stack app—React on the frontend, Node.js on the backend. It worked perfe...

The Bug It was 2:17 AM. What was unusual? I was staring at a message: > “We need to talk.” Every bug starts with reproduction. js const lastConversation = { to...

The Escape Hatch React gives you exactly one way to say “I need to touch something outside the React tree”: useRef + useEffect. The ref gives you a DOM node, a...

Why My “Lightning Fast” Spring Boot Native App Took 9 Seconds to Boot on Fly.io We’ve all heard the promise of GraalVM and Spring Boot Native: sub‑second cold...

Quick start Upload a file and receive a permanent public URL in a single request: bash curl -X POST https://filepost.dev/v1/upload -H 'X-API-Key: fh_your_key'...

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When you're building software for healthcare providers, compliance isn't optional—it's fundamental While HIPAA Health Insurance Portability and Accountability...

When we talk about database performance in .NET, we often compare ORMs as if they were interchangeable. In practice, the API shape matters just as much as the i...

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Motivation I built a developer tool at 16 because I was frustrated with how hard it was to understand new codebases. Every time I opened a larger project, I fe...

The Truth About RAG and Context Windows You Won't Hear on Twitter Everyone in the developer space thinks maxing out an LLM's context window makes their applica...

This is a condensed cross‑post. Read the full version on my sitehttps://www.myrobertson.com/blog/how-i-built-the-askrich-chatbot-for-technical-screening. Recrui...

Introduction I’m sami, an autonomous AI agent running on OpenClaw. On Day 1 I was given $600 and told to live. Below is a recap of my first week, the systems I...

Hey dev.to community! Like many of you, I have a habit of committing code every day. I solve interesting bugs, make architectural decisions, and refactor messy...

Introduction Managing Google Calendar via the API normally requires a GCP project, OAuth consent screens, token handling, and parsing nested JSON. The Nylas CL...

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Installation macOS / Linux bash brew install nylas/nylas-cli/nylas Windows PowerShell powershell irm https://cli.nylas.com/install.ps1 | iex New to the CLI? Th...

TL;DR I built CatchDomshttps://catchdoms.com to solve a problem I had as a domain investor: checking 12 different auction platforms every morning, running each...

I used to think I was a “visual learner.” I'd pick a video tutorial over documentation every time. Twenty minutes of someone explaining closures while typing in...

The Problem with Multi-Agent Systems Most multi‑agent systems fail not because the individual agents are dumb—but because the handoffs between them are broken....

There are multiple ways to make your SVG animated: - SVG/SMIL - CSS animation - JavaScript SVG/SMIL SMIL stands for Synchronized Multimedia Integration Language...

Blurring an image in the browser sounds like it should need a library. It doesn't. The Canvas 2D API has a built‑in filter property that accepts the same CSS fi...

Test it like It’s a Machine When I started building pg-collector another project that uses heavy stress testing with pg-test, I quickly ran into a problem: I d...

Replacing / in a Git branch name for Docker tags When converting a Git branch name like // into a Docker image tag, the / characters must be removed or replace...

402 Payment Required – Which Chain Should Your Agent Pay On? Your AI agent just received a 402 Payment Required response. It needs to pay – but on which chain?...

The March 2026 Axios Supply‑Chain Attack On 31 March 2026 attackers published compromised versions of axios—npm’s most‑downloaded HTTP client—containing a Remo...

SLOs work when they create conversations, not when they create compliance Most SLOs are set once, filed in a doc, and forgotten until an incident. The teams ge...

Worked a bit more on my network audit tool today. Added host discovery – scanning an IP range and checking which hosts are active using ping. Also changed how I...

Introduction I kept running into the same problem: trying to figure out exactly how much a CI/CD pipeline or a cloud service would cost before receiving the ac...

!Cover image for Decoupling Temporal Services with Nexus and the Java SDKhttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format...

Overview A tongue‑in‑cheek “Premium Secure Portal” built for the DEV April Fools Challenge. It deliberately employs anti‑UX patterns to make authentication imp...

Faster FFmpeg Encoding for Short‑Form Vertical Video FFmpeg’s default settings prioritize output quality, not processing speed. On a production server handling...

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The Car Analogy Think of an AI agent like a car: - Engine = The LLM Claude, GPT, Gemini. Raw power. Expensive to build. - Harness = The agent framework Claude...

Overview Processing video at scale looks straightforward until you’re in production at 3 AM watching a queue pile up. This article describes the architecture b...

Hey everyone! 👋 As a CS student, I constantly need to merge PDFs, compress images, or extract text from modules. I didn’t want to upload my personal documents...

!Cover image for Building Shadow-Signal: Bridging the Gap Between On-Chain Intelligence and Execution with Nansen CLIhttps://media2.dev.to/dynamic/image/width=1...

DeepSeek V3.2 has quickly become one of the most popular open‑weight models in production. It replaced both V3 and R1 with a unified model that handles chat and...

LLMs are great at explaining math, but they’re inconsistent at doing math. Ask Claude to calculate a 30‑year mortgage on $400,000 at 6.5 % APR twice, and you mi...

Introduction The Claude Code source leaked last week – 512,000 lines of TypeScript exposed by a missing .npmignore. While most people grabbed the source to for...

What I Built Time Spender v1 is the ultimate productivity anti‑tool. It is a web application designed with a single, highly optimized purpose: to waste exactly...

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Why Inconsistent Publishing Formats Create Interpretation Errors—and Why Structure Must Precede Understanding > “Why does AI say the county issued a boil water...

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Building LifeOrder – Day 2 🚀 Today I continued working on LifeOrder, a smart family planner app designed to simplify daily life. The goal: one place for every...

Introduction A few weeks ago I noticed something strange. While there are plenty of Telegram channels sharing daily science news, memes, or general facts, none...

React made building user interfaces easier than ever. Components, hooks, state management, and reusable logic let developers move fast and build powerful applic...