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DEV Community • 2026-04-17 06:58

I built a database engine in pure C – here's what I learned

I recently built MiniDB Studio, a lightweight database engine in pure C (C11) as a learning project. Here's what I ended up building and what surprised me along the way. What it does B+ Tree indexing on id and age fields Hash indexes for fast exact lookups WAL-style crash recovery with CSV snapshot replay A native desktop UI built with raylib A lightweight query optimizer for range s...

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1m read
DEV Community • 2026-04-17 06:58

I Made a Free Tool That Roasts Your Website's Health in 20 Seconds

I built a website health scanner that checks for broken assets, SSL issues, missing security headers, and more. Here's what it finds on most sites "How do I know if my site has issues right now?" So I built a free scanner that answers that in 20 seconds: getsitewatch.com/scan Paste any URL. No signup. No email. Just a health report. I've been running it on random production sites and the findi...

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4m read
DEV Community • 2026-04-17 06:54

Why We Rebuilt Our Internal Tool from Scratch And What I Learned

At my previous company, we spent three years trying to make Salesforce, Zapier, and a handful of SaaS tools work together as a unified CRM plus operations platform. We had 14 active integrations, two dedicated engineers on "glue work," and a Slack channel called #zapier-is-on-fire. Eventually, we stopped patching the gaps and built our own internal tool. That experience changed how I think about t...

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5m read
DEV Community • 2026-04-17 06:51

Email Drafter — Multi-Agent Email Writing with Google ADK and Cloud Run

What I Built I built Email Drafter, a small web app that turns structured user input into a polished email draft using a multi-agent workflow. The app takes: recipient type purpose tone language key points Instead of using one giant prompt, I split the workflow into multiple specialized roles. The system works like this: one agent plans the email one agent reviews the plan one a...

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2m read
Product Hunt — The best new products, every day • 2026-04-17 06:50

Arky

The canvas for thinking with AI Discussion | Link

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1m read
DEV Community • 2026-04-17 06:48

fscan: Find dead code in your Flutter project from the command line

Your Flutter project probably has more dead code than you think. Dart's analyzer is great at catching type errors. It won't tell you that lib/features/onboarding/legacy_screen.dart hasn't been imported since March, or that assets/images/old_logo.png is still in your pubspec but never rendered. I built fscan to solve this. It's a CLI tool written in Go that performs static dead-code analysi...

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1m read
DEV Community • 2026-04-17 06:48

Remote jobs in Rust – from a file to NATS in three steps

Introduction Every application eventually needs to offload work to another process. Parse a file, send an email, trigger a report – tasks that shouldn't block your main service and might even run on a different machine. Most solutions require you to commit to their ecosystem from day one – their queue, their worker format, their retry logic. And if you want to swap the transport later, you're re...

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8m read
io_uring Adventures: Rust Servers That Love Syscalls
DEV Community • 2026-04-17 06:47

io_uring Adventures: Rust Servers That Love Syscalls

Our Rust file server hit a ceiling at 45K requests/sec. Switching to io_uring multiplied throughput 3.4x and cut latency 68% — but the… io_uring Adventures: Rust Servers That Love Syscalls Our Rust file server hit a ceiling at 45K requests/sec. Switching to io_uring multiplied throughput 3.4x and cut latency 68% — but the journey taught us syscalls aren’t the enemy, contex...

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12m read
Why Agentic AI is Killing the Traditional Database
DEV Community • 2026-04-17 06:42

Why Agentic AI is Killing the Traditional Database

Your AI agent just wrote a new feature, generated 10 different schema variations to test performance, and deployed 50 ephemeral micro-services—all in under three minutes. Now, it needs a database for every single one of them. If you're relying on a traditional RDS instance, you're staring at a massive bill for idle compute and a manual migration nightmare. The rise of agentic software developmen...

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4m read
DEV Community • 2026-04-17 06:39

The POUR principles of web accessibility for developers and designers

WCAG, the Web Content Accessibility Guidelines, can feel overwhelming. The current version (WCAG 2.2) has 13 guidelines and 86 success criteria across three conformance levels. Most developers and designers never read them cover to cover. They don't need to. What they do need is a mental model, a way to think about accessibility that makes the specifics easier to understand and apply. That mental...

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1m read
DEV Community • 2026-04-17 06:37

Quantum Neural Network 3D — A Deep Dive into Interactive WebGL Visualization

Introduction In the modern era of web development, static interfaces are no longer enough. Users expect immersive, interactive, and visually engaging experiences. With this vision in mind, I developed Quantum Neural Network 3D — an advanced real-time 3D neural network visualization built using Three.js and WebGL. This project is not just about visuals; it represents a combination of ma...

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4m read
DEV Community • 2026-04-17 06:32

How To Install Caveman In Codex On macOS And Windows

If you use Codex inside VS Code and want shorter, more compressed responses, caveman is a simple local plugin that adds that behavior. This guide shows the full setup for both macOS and Windows. It uses a local plugin plus a local marketplace entry, so you do not need to publish anything remotely. What Caveman Does caveman adds a skill that tells Codex to answer in a much tighter styl...

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5m read
DEV Community • 2026-04-17 06:31

Automation Pipeline Reliability: Why Your Workflow Breaks When Nobody Is Watching

If your deployment, sync, backup, or report workflow depends on scheduled or chained automation, automation pipeline reliability is not a nice-to-have. It is the difference between a smooth system and a production mess that quietly grows for hours. A lot of teams assume their pipeline is reliable because each step works most of the time. The build passes, the cron job exists, the queue worker is ...

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8m read
DEV Community • 2026-04-17 06:30

I Built an 'Open World' AI Coding Agent — It Works From ANY Folder

The Problem Every AI coding agent I've used has the same fatal flaw: it forgets when you close the session. Open from folder A → works great Close → Open folder B → "Who are you? What are we working on?" Forgetting context isn't just annoying. It's a productivity killer. The Solution: Open World Architecture I built a memory system for OpenCode that transforms it from a st...

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2m read
DEV Community • 2026-04-17 06:30

From Freelancing to Product: A Tech Service Company's SaaS Transformation

The Freelancing Ceiling Freelancing (contract development / outsourced dev work) is the fastest way for a technical person to start earning money. You have the skills, clients have the needs -- money for deliverables, simple as that. But freelancing has a fatal flaw: your income = your time x your hourly rate. No matter how good you are, there are only 24 hours in a day. When your sch...

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4m read
DEV Community • 2026-04-17 06:28

China's AI Giants: Adding Tencent Hunyuan & ByteDance Doubao to AI University (74 Providers)

China's AI Giants: Tencent Hunyuan & ByteDance Doubao — AI University Update I've added Tencent Hunyuan and ByteDance Doubao to the AI University in my app, bringing the total provider count to 74 companies. With Baidu already registered, China's "BAT" trio is now complete. Tencent Hunyuan — Open Source Multimodal Powerhouse Tencent's AI brand stands out by releasing wor...

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2m read
On the Vibe Coders and Their Lies
DEV Community • 2026-04-17 06:26

On the Vibe Coders and Their Lies

Let me tell you what I was doing while Andrej Karpathy was coining the term "vibe coding." I was writing a single-file, modal text editor in C. For years, my primary editor was vim; not neovim, yes, regular old vim. Not an IDE person, but my intention in writing this isn't to make you a terminal supremacist. Some time back, I found snaptoken's "Build Your Own Text Editor" tutorial, based on ant...

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11m read
DEV Community • 2026-04-17 06:24

clerk: Auto-Summarize Your Claude Code Sessions

The Friday Afternoon Problem It's 4 PM on Friday. Your manager asks for the weekly report. You stare at your terminal, trying to remember what you did on Monday. Was it the auth refactor or the API migration? Which project was that even in? You open git log. Scroll. Scroll. Scroll. Piece together commit messages across 4 repositories. Thirty minutes later, you have a rough draft that s...

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4m read
DEV Community • 2026-04-17 06:23

Why SNMP Monitoring Misses 80% of Network Problems — And What to Use Instead

If your network monitoring strategy relies primarily on SNMP polling, you're flying blind to most of the problems that actually cause downtime, slowdowns, and user complaints. That's not an exaggeration. Here's why. What SNMP Sees SNMP (Simple Network Management Protocol) polls devices — routers, switches, firewalls — for counters: interface utilization, CPU load, memory usage, error ...

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4m read
DEV Community • 2026-04-17 06:22

CrewAI vs LangGraph vs AutoGen: Which Framework for Production AI Agents?

We've shipped production agents on all three frameworks in the last 18 months. Here's the honest comparison most tutorials won't give you. Every other week a new agent framework trends on GitHub, and every other week a tech lead asks us the same question: "Which one should we actually build on?" The short answer is: it depends on what you're building, who's building it, and how mature your ops pr...

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8m read
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