DEV Community • 2026-04-21 06:49

Building AI Systems vs. AI Features: What Nobody Tells You About Production

Building AI Systems vs. AI Features: What Nobody Tells You About Production You've seen the demos. Smooth, fast, impressive. The model returns exactly the right thing, the UI renders it beautifully, and everyone in the room nods approvingly. Then you ship it. And that's when the real work begins. There's a distinction that separates teams successfully running AI in production from tea...

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6m read
DEV Community • 2026-04-21 06:49

A Developer’s Lesson on Feedback

I built my first React Native MVP for a startup pitch. I was proud of it… until the feedback started coming in. Instead of handling it, I passed it to a junior teammate. At the time, I told myself: “I just don’t like being told what to do.” But the truth? I was tired. I felt unappreciated. And I was too attached to my work. Later that day, I stepped away, came back, and realized something: ...

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1m read
DEV Community • 2026-04-21 06:48

Building My Digital Soul: What 6 Months of Creating a "Runtime for Kevin Taught Me About Identity

Building My Digital Soul: What 6 Months of Creating a "Runtime for Kevin Taught Me About Identity Honestly, I started this project with what I thought was a brilliant idea: "Let me build a digital soul runtime for myself!" Six months later, after countless sleepless nights and exactly one GitHub star, I'm here to tell you the brutal truth about creating digital identities. It all start...

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8m read
DEV Community • 2026-04-21 06:45

Why PMCF under MDR feels harder than it reads (and what I actually do about it)

I’ve been writing PMCF plans and defending them to notified bodies for the better part of five years. On paper, PMCF under MDR is straightforward: Annex XIV sets out the requirement for ongoing clinical follow‑up after CE marking, and Annex II section 6.1 tells you to include clinical evidence in the Technical File. In practice, “ongoing” turns into multi-year commitments, and “evidence” turns int...

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4m read
I Built a $0 Search Engine on Real Web Data (No Algolia or Elasticsearch)
DEV Community • 2026-04-21 06:43

I Built a $0 Search Engine on Real Web Data (No Algolia or Elasticsearch)

I’ve been reviewing some old RAG code I wrote a year ago and boy has it not aged well. For context: frequently, I’ll need to do what I call a fast “literature” pass. What’s the latest opinion on long context vs. RAG? What’s new for agentic retrieval? Where does hybrid search fit in 2026? I depend heavily on arxiv papers for this. Using a SERP API (Bright Data) for Google, running site:arxiv.org p...

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20m read
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
Java Packages
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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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
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