DEV Community • 2026-04-22 00:35

Building MailSink: a temp email API with MCP server on Cloudflare Workers

The problem Testing email flows in CI has been painful for years. MailSlurp is $79/mo, Mailtrap's API isn't built for AI agents, and most alternatives want you to run your own SMTP server. I wanted something different: a REST API callable from tests, with an MCP server so AI agents could run email-verified signup flows natively. So I built it. What it does MailSink gives y...

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DEV Community • 2026-04-22 00:35

All 5 Security+ domains, Splunk certified, 35 applications sent

Three weeks into a structured cybersecurity learning journey. Week 3 review. What this week accomplished All five Security+ domains are covered for the first time. Splunk certificate earned. Hash cracker built. 35 job applications sent. Four Python tools on GitHub. Bandit level 24. Security+ — the full picture Weeks 1-2 covered Domains 1-3 (50% of exam). Week 3 completed Do...

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We Built an AI Comic Generator in 3 Sprints — Here's What Actually Worked
DEV Community • 2026-04-22 00:26

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 that had been nagging at me: what if you could turn a single sentence — "a robot learns to paint in a post-apocalyptic city" — into a fully illustrated comic strip, complete with characters, panel layouts, and dialogue? We called it Comicly...

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DEV Community • 2026-04-22 00:20

Slow SSD Performance? Check Your BIOS Settings!

Slow SSD Performance? Check Your BIOS Settings! Are you experiencing slow SSD performance? You're not alone. Many users have reported issues with their NVMe SSDs, and it's not just a matter of hardware quality. In this article, we'll dive into the surprising culprit behind slow SSD performance: your BIOS settings. The Problem: Slow SSD Performance NVMe SSDs are designed to p...

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DEV Community • 2026-04-22 00:19

Kiwi-chan Devlog #007: The Chest & The Logs - A Tale of Repeated Failures (and Fixes!)

Okay, folks, buckle up! It's been a busy four hours with Kiwi-chan. We're still firmly in "early base building" mode, and let me tell you, it's... a process. The core loop is solid: identify need (no crafting table/chest), gather resources (oak logs), craft, place. But the devil, as always, is in the details. The biggest struggle today has been inventory management and item pickup. Kiwi-chan was ...

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DEV Community • 2026-04-22 00:14

Big O Notation explained

Introduction Big O notation measures how fast your code runs as the number of inputs grows. It’s really important to understand the following algorithms and try to apply the most performatic ones in your solutions. I will order them from fastest to slowest: O(1) — Constant Time When using O(1), it doesn’t matter the size of your input, the code will always take the same time ...

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DEV Community • 2026-04-22 00:12

AI Agents Are Shipping Features Without You. Now What?

Jaskaran Singh — Senior Software Engineer, AI Trainer A few weeks ago I watched an agent open a GitHub issue, write the fix, run the tests, and open a pull request. No human typed a line of code. The PR passed review. I didn't find this inspiring. I found it genuinely disorienting — and I say that as someone who trains AI models for a living and is currently building an agent of my own. If y...

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DEV Community • 2026-04-22 00:12

When the Cloud Fails, the Browser Still Thinks

Browser-native LLMs are the most underrated shift in edge AI. Here's why. 3:17 AM. North Sea. 200 kilometers from the nearest coastline. The satellite uplink has been down since midnight. The drilling platform runs on skeleton watch. At exactly 3:17, a pressure sensor on mud pump P-3 starts drifting. Marcus, the on-call engineer, pulls up the asset interface on his tablet. Types what he sees...

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DEV Community • 2026-04-22 00:12

From Pixels to Physical Therapy: Building a Real-Time Pose Correction System with MediaPipe and React

In the era of telehealth, the gap between a patient's living room and the physiotherapy clinic is closing fast. Thanks to breakthroughs in Computer Vision and Edge AI, we no longer need expensive motion-capture suits to track movement. Using MediaPipe, Pose Estimation, and WebAssembly, we can turn a standard webcam into a sophisticated clinical tool that provides real-time biomechanical feedback. ...

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DEV Community • 2026-04-22 00:11

Wait, you guys run evals?

Comes in my mind a meme with this expression but clearly cannot find the image related to. my question folks of this community is: whenever u build a system or a product or anything that contains a model in the backend that takes actions and is in charge of decisions that require rigor, u search few good peer reviewed benchmarks run the hardest tasks to grant ur self a bon bon of antisycophancy a...

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DEV Community • 2026-04-22 00:08

How to Check Your MCP Server for CVE-2026-5603's Vulnerability Pattern (And Why shellQuote Isn't Enough)

CVE-2026-5603 is a Critical command injection in @elgentos/magento2-dev-mcp, but the vulnerability pattern it represents shows up in community MCP servers regularly. This post explains what the vulnerability is, why the sanitizer fails on Windows, how to check your own MCP server code for the same issue, and what the correct fix looks like. What Is CVE-2026-5603? @elgentos/magento2-dev-mcp is an...

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Human vs Machine: the Bug
Giant Robots Smashing Into Other Giant Robots • 2026-04-22 00:00

Human vs Machine: the Bug

Sally fixes a bug without AI, then invites Claude to try.

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Calibre Blog • 2026-04-22 00:00

Delivering a dynamic hexagonal world map in just 10kb

How we built a new custom hexagonal cartogram map displaying user experience rating

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Brave’s unique Shred button now available for Android, letting users enhance their privacy by easily discarding tracking site data
Brave’s latest news on Brave • 2026-04-22 00:00

Brave’s unique Shred button now available for Android, letting users enhance their privacy by easily discarding tracking site data

Starting with version 1.89, Brave for Android brings Shred from iOS, so you can clear one site's data without logging out of others, with optional Auto Shred on tab or browser close.

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Securing Gemini Enterprise Agent Platform Runtime with Auth0 for AI Agents
Auth0 Blog • 2026-04-22 00:00

Securing Gemini Enterprise Agent Platform Runtime with Auth0 for AI Agents

This comprehensive guide outlines the implementation of a secure framework for authentication and authorization in Gemini Enterprise Agent Platform Runtime.

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swyx's site RSS Feed • 2026-04-22 00:00

What you can do in a decade

I turned 40 today. For my 35th I did principles, but for my 40th, I wanted to offer perhaps more useful reflections.

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DEV Community • 2026-04-21 23:54

Generators are APIs — Designing Better DX in Rails

This article is based on the talk I gave at Tropical on Rails 2026 in São Paulo. If you were there, this is the written version. If you weren't — welcome. This is the whole thing. Introduction: Rails generators are one of the most underrated tools in the framework. Every Rails developer has used them. Few have designed them. And almost nobody treats them as what they actually are: an API. This...

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DEV Community • 2026-04-21 23:53

After the Vercel Breach: Rethinking Where Your Auth Secrets Live

If you've been anywhere near dev Twitter or Reddit this week, you've probably seen the panic: Vercel reportedly suffered a security breach that may have exposed environment variables not marked as "sensitive" in their dashboard. The immediate advice from the community? Rotate your keys. Now. Whether this turns out to be as bad as the initial reports suggest or not, it's a wake-up call. A lot of u...

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Hacker News: Front Page • 2026-04-21 23:53

Drunk Post: Things I've Learned as a Senior Engineer

Article URL: https://luminousmen.substack.com/p/drunk-post-things-ive-learned-as Comments URL: https://news.ycombinator.com/item?id=47856535 Points: 5 # Comments: 1

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LLM routing per tier via OpenRouter — when one model doesn't fit all
DEV Community • 2026-04-21 23:50

LLM routing per tier via OpenRouter — when one model doesn't fit all

📦 Full runnable example: github.com/sm1ck/honeychat/tree/main/tutorial/02-routing — docker compose up exposes POST /complete on localhost:8000. Every snippet below is pulled from that repo. Most introductory "chat with AI" tutorials pick one model and call it a day. That works in a toy. It stops being enough in production, where users have different price sensitivity, different conversation sty...

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