Morning.dev

DEV Community • 2026-04-21 06:40

Your MediatR Command Just Lost an Email. Here's Why.

You ship a CheckoutCommand. It writes an Order, charges the card, then calls _mediator.Publish(new OrderPlaced(...)) which fires off SendConfirmationEmailHandler and NotifyWarehouseHandler. A week later, support pings you: a customer was charged, sees the order in their history, but never got a confirmation email. The warehouse has no record either. You dig into the logs. [18:42:13] INF Order...

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6m read

DEV Community • 2026-04-21 06:38

MCP Server Kubernetes Deployment — Surviving the 52% Death Rate

Last month I was connecting a few external MCP servers and noticed something odd. READMEs had "stable" tags, GitHub star counts in the hundreds — yet hitting /mcp just dropped the connection. I figured it was my config at first. Then another server, then another. Same result. Turns out it wasn't just me. An April 2026 scan of 2,181 remote MCP endpoints found 52% completely dead, with only 9% full...

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10m read

Postgres MCP in Go - Giving Claude Code a Live Line to Your Database

DEV Community • 2026-04-21 06:36

Postgres MCP in Go - Giving Claude Code a Live Line to Your Database

Introduction Copy-pasting SQL from a chat window into a DB client and back again is how most "AI + database" workflows actually feel. 🙃 It breaks flow, loses context, and the assistant never sees your real schema - so it guesses. The Model Context Protocol fixes that by letting an AI assistant speak to tools over a standard channel. This project is a Go MCP server that plugs Claude Cod...

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5m read

DEV Community • 2026-04-21 06:34

After 34 Dev.to Posts: What My "Second Brain" Project Really Taught Me About Failure

After 34 Dev.to Posts: What My "Second Brain" Project Really Taught Me About Failure You know that moment when you look at your GitHub stars and realize you've spent 1,847 hours on a project with only 6 stars? Yeah, that's me staring at Papers right now. After writing 34 articles about this thing, I think it's time for some brutal honesty. The Dream That Became a Nightmare L...

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6m read

Best Arcade.dev alternatives for AI agent integrations in 2026

DEV Community • 2026-04-21 06:34

Best Arcade.dev alternatives for AI agent integrations in 2026

TL;DR Arcade.dev is an MCP runtime that executes authenticated tool calls for AI agents. It works well for MCP-first teams that need a hosted runtime and user-scoped auth. But production AI agents usually need more than tool calls: continuous data syncs for RAG, webhook ingestion, and deep observability across API integrations. If you are evaluating alternatives, pick the one that cove...

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13m read

DEV Community • 2026-04-21 06:32

From Knowledge Chaos to Clarity: What 2,847 Articles Taught Me About Building a Real "Second Brain"

From Knowledge Chaos to Clarity: What 2,847 Articles Taught Me About Building a Real "Second Brain" Honestly, when I first started this "second brain" project, I thought I was being brilliant. I spent countless hours building an AI-powered knowledge management system that would revolutionize how I work. Two years and 2,847 articles later, I'm here to tell you the brutal truth about what...

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8m read

DEV Community • 2026-04-21 06:32

Java Packages

A package in Java is used to group related classes. Think of it as a folder in a file directory. We use packages to avoid name conflicts, and to write a better maintainable code. Packages are divided into two categories. Built-in Packages (packages from the Java API) User-defined Packages (create your own packages) The Java API is a library of prewritten classes, that are free to use, included...

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2m read

I’m about to curse the day I started programming…

DEV Community • 2026-04-21 06:32

I’m about to curse the day I started programming…

I’m about to curse the day I started programming. I’m using a JR3288LS 2NA, and even though I installed Debian 9, I’m having issues with Bluetooth. When I check the kernel logs, it says it can’t find the Bluetooth power GPIO pin. Do you think that’s possible? The board officially supports Debian 9, yet the kernel configuration might still be wrong?

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1m read

DEV Community • 2026-04-21 06:30

Local LLM on NVIDIA GPU vs Cloud API: A Real Cost Analysis

Local LLM on NVIDIA GPU vs Cloud API: A Real Cost Analysis "The cheapest API call is the one you never make." Every AI startup faces this question: should we run inference locally on GPUs, or use cloud APIs? The answer depends on your workload, your data sensitivity, and your scale. We've been running both. For 30 days, we tracked every cost — hardware amortization, electricity, API...

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6m read

Hacker News: Front Page • 2026-04-21 06:25

Using Changesets in a polyglot monorepo

Article URL: https://luke.hsiao.dev/blog/changesets-polyglot-monorepo/ Comments URL: https://news.ycombinator.com/item?id=47845274 Points: 4 # Comments: 0

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1m read

DEV Community • 2026-04-21 06:25

FinOps for AI vs MLOps: Understanding the Roles in AI Operations

AI is no longer an experiment—it’s an operational engine. But as organizations scale AI, two parallel disciplines emerge to keep things efficient, reliable, and sustainable: FinOps for AI and MLOps. At first glance, both seem to operate in the same ecosystem. In reality, they solve very different problems—one manages cost intelligence, the other manages model intelligence. The Core Distinction • F...

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3m read

DEV Community • 2026-04-21 06:24

Apollo vs Hunter vs Lusha vs PDL: The Cost-Per-Contact Number Nobody Publishes (2026)

I ran Apollo.io, Hunter.io, Lusha, and People Data Labs against the same 450-contact test set last quarter. Every tool claimed 95%+ accuracy on their pricing pages. None of them hit it. The gap between advertised per-seat cost and what I actually paid per working contact ranged from 2x to 6x depending on the tool and tier. Here's what the real math looks like — including PDL, which almost every c...

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7m read

DEV Community • 2026-04-21 06:24

I built a 100-point prompt scorer for SUNO AI — 16 checks, open-source on npm

Why deterministic prompt scoring? A few months ago I was using SUNO AI and kept regenerating the same song idea 20-30 times before getting something close to what I imagined. The prompt syntax felt opaque. Genre close but sub-genre missed. Mood right but vocals wrong. Turns out SUNO's prompt behavior is actually deterministic enough to score. So I wrote one: suno-prompt-scorer on npm (...

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2m read

CISA Adds 8 Exploited Flaws to KEV, Sets April-May 2026 Federal Deadlines

The Hacker News • 2026-04-21 06:23

CISA Adds 8 Exploited Flaws to KEV, Sets April-May 2026 Federal Deadlines

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Monday added eight new vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, including three flaws impacting Cisco Catalyst SD-WAN Manager, citing evidence of active exploitation. The list of vulnerabilities is as follows - CVE-2023-27351 (CVSS score: 8.2) - An improper authentication vulnerability in PaperCut

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1m read

Why Power Planes Should Stay Small: A PCB Designer's Guide to Ground and Power

DEV Community • 2026-04-21 06:20

Why Power Planes Should Stay Small: A PCB Designer's Guide to Ground and Power

1. Introduction In the intricate world of Printed Circuit Board (PCB) design, every decision, from trace width to component placement, significantly impacts performance. Among the most fundamental yet often misunderstood aspects are power and ground planes. These aren't just large copper areas; they are critical elements that dictate a circuit's signal integrity, electromagnetic compati...

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10m read

Hacker News: Front Page • 2026-04-21 06:19

Louis Zocchi, inventor of the d100, has died

Article URL: https://icv2.com/articles/news/view/62176/r-i-p-louis-zocchi-the-godfather-dice Comments URL: https://news.ycombinator.com/item?id=47845231 Points: 6 # Comments: 0

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1m read

DEV Community • 2026-04-21 06:18

Vibe Coding: The Golden Rule

Simply Naming The syntax "holy wars" debating order_id vs OrderId are over. In the era of vibe coding, AI handles casing effortlessly. Technical trivialities have given way to a far more critical focus: the semantic depth of the name itself. Vibe Coding shifts us from writing instructions for processors to describing intent for intelligence. Code is now written for the LLM and the huma...

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3m read

Everyone's talking about "Caveman" — the tool that cuts 75% of your AI tokens.

DEV Community • 2026-04-21 06:18

Everyone's talking about "Caveman" — the tool that cuts 75% of your AI tokens.

Spoiler: it's more like 4%. And honestly? That's still kind of impressive when you understand why. I've been using Claude Code heavily, and like most of you, I'm always looking for ways to keep costs down. So when Caveman started trending — a tool that makes Claude respond like a caveman to slash token usage — I had to dig into the actual numbers. Here's what a typical 100K token session act...

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1m read

Newest questions tagged javascript - Stack Overflow • 2026-04-21 06:18

Looking for feedback/collaboration on an educational web game for students (focus: engagement & learning design)

I’m currently building a browser-based educational game using HTML, CSS, and JavaScript, targeted at students in my country. The goal is to make learning feel less like a chore and more like something students want to engage with daily — almost like a game or hobby. The current system includes: Quiz-driven progression (answers move the character forward/backward) Timer and progress-based levels Un...

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1m read

DEV Community • 2026-04-21 06:17

How to Set Up Claude as Your OTC Crypto Dealer in 5 Minutes

If you've been following the MCP (Model Context Protocol) ecosystem, you know AI agents can now do real work — not just answer questions, but actually operate tools on your behalf. One of the more interesting fits: OTC crypto trading. This tutorial walks through wiring Claude Desktop to Hashlock Markets, an intent-based, sealed-bid RFQ protocol that settles trades with Hash Time-Locked Contracts ...

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4m read