Instructions Are Not a Harness — Harness Engineering in action
DEV Community • 2026-04-09 18:20

Instructions Are Not a Harness — Harness Engineering in action

There's a moment every developer hits when building with AI agents. The agent does something wrong. You add a rule to the system prompt. The agent does the same thing wrong again. You make the rule more explicit. It still happens. You start wondering if the model is the problem. It isn't. The rule is the problem. Rules describe what you want. They don't prevent what you don't want. And that dist...

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7m read
DEV Community • 2026-04-09 18:20

SQL Aggregate Functions: Stop Guessing, Start Calculating

SQL Aggregate Functions: Stop Guessing, Start Calculating If you've ever needed to answer questions like "How many orders did we get this month?", "What's our total revenue?", or "Who's our highest-paid employee?" — you need SQL aggregate functions. They're the workhorses of data analysis, and once you understand them, you'll wonder how you ever got by without them. In this guide, we'l...

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6m read
DEV Community • 2026-04-09 18:20

I Analyzed 100 Rental Leases Using AI — Here’s What I Found

Most people don’t fully read their lease agreements. Not because they don’t want to — but because they’re hard to understand. So I decided to test something: 👉 What if we analyze leases using AI? Over the past few weeks, I ran around 100 rental lease agreements from different U.S. states through an analysis system. The results were surprisingly consistent. Common Patterns Across Leases Here...

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DEV Community • 2026-04-09 18:19

SqlDependency in .NET – Query Notifications and Real-Time Data Change Reactions

Imagine your application constantly bombarding the database with questions: "Has anything changed? How about now? And now?" Every second, every minute. You're needlessly burning CPU, network, and database resources, even though the data might only change once an hour. There's a much better way. Let the database tell you when something changes. That's exactly what SqlDependency is for. SqlDepende...

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9m read
Why GitHub Repositories Are Confusing for Non-Developers (And What I Built to Fix It)
DEV Community • 2026-04-09 18:19

Why GitHub Repositories Are Confusing for Non-Developers (And What I Built to Fix It)

I recently tried sharing one of my projects with a non-technical friend. I sent them the GitHub link… and within seconds, they were lost. They didn’t understand: What the README really meant Why there were so many files Which part actually mattered And honestly, I couldn’t blame them. The Problem GitHub is built for developers. It’s optimized for: Version control Collaboration Code stru...

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Hormuz at near standstill as Iran warns ships to keep to its waters
newest submissions : multi • 2026-04-09 18:18

Hormuz at near standstill as Iran warns ships to keep to its waters

submitted by /u/graveyardofgoodsense to r/worldnews [link] [comments]

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1m read
/r/ReactJS - The Front Page of React • 2026-04-09 18:17

I built agrex, a React library for real-time graph visualization of AI agent execution flows

Built on React Flow. You feed it nodes (agents, tools, calls) and it renders an interactive graph that updates in real time as your agent system runs. The problem it solves: chat UIs are everywhere but they're a terrible fit for visualizing agent orchestration: branching, retries, parallel tool calls, delegation. A graph shows what's actually happening. Features: Real-time node creation, status u...

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You really, really, really don't need an effect! I swear!
/r/ReactJS - The Front Page of React • 2026-04-09 18:14

You really, really, really don't need an effect! I swear!

all the reasons you might reach out for useEffect and why you shouldn’t submitted by /u/creasta29 [link] [comments]

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‘Mental breakdown’: oil tanker workers stuck in Gulf for six weeks are reaching their limit
newest submissions : multi • 2026-04-09 18:14

‘Mental breakdown’: oil tanker workers stuck in Gulf for six weeks are reaching their limit

submitted by /u/Northern_crocodile to r/worldnews [link] [comments]

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1m read
DEV Community • 2026-04-09 18:13

How I repackaged the official Windows Codex MSIX into a working Linux .deb

I wanted a real Linux desktop app for Codex. At first, this looked like it should be straightforward: take the official Windows package, unpack it, swap in Linux Electron, rebuild whatever was platform-specific, and turn it into a .deb. That is not what happened. What actually worked was more pragmatic: preserve the official Codex payload, branding, and resources from the Windows MSIX, but repl...

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Hacker News • 2026-04-09 18:13

Show HN: Last Year I wrote a (Sci)fictional story where the EFF was a player [pdf]

Comments

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You really, really, really don't need an effect! I swear!
/r/ReactJS - The Front Page of React • 2026-04-09 18:12

You really, really, really don't need an effect! I swear!

all the reasons you might go for useEffect and why you shouldn’t submitted by /u/creasta29 [link] [comments]

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1m read
DEV Community • 2026-04-09 18:12

Enterprise Search Just Got a Protocol Upgrade: Inside Pureinsights Discovery 2.8*

The Shreesozo Dispatch | MCP & Agentic AI | April 2026 The Problem Nobody Was Fixing Fast Enough Enterprise search and AI agents have been living in parallel universes. On one side: search platforms indexing PubMed, SharePoint, internal wikis, Oracle databases, and file shares. On the other: AI agents capable of reasoning, planning, and executing tasks. The problem was that agents...

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6m read
Hacker News: Front Page • 2026-04-09 18:10

What Game Engines Know About Data That Databases Forgot

Article URL: https://nockawa.github.io/blog/what-game-engines-know-about-data/ Comments URL: https://news.ycombinator.com/item?id=47707269 Points: 15 # Comments: 0

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DEV Community • 2026-04-09 18:10

A Survey and Taxonomy of Graph Sampling

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Experienced Devs • 2026-04-09 18:10

[Meta] Block submissions from user's with hidden history

Frankly they are always AI slop trying to soft peddle their product with a follow up comment. submitted by /u/IPv6forDogecoin [link] [comments]

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DEV Community • 2026-04-09 18:09

One day they'll have secrets...

One day they'll have secrets... ...one day they'll have dreams. ~ Dr. Alfred Lanning, I, Robot Yesterday I was reviewing the Scout LLM project with Claude while working through her code, and I stumbled on a bug that I just wasn't sure about. We talked it through, then I got lazy and asked Claude to write the corrected source code for me. It refused. Claude didn't want to waste the precious f...

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6m read
Hacker News: Front Page • 2026-04-09 18:09

ChatGPT Pro now starts at $100/month

Article URL: https://chatgpt.com/pricing/ Comments URL: https://news.ycombinator.com/item?id=47707253 Points: 45 # Comments: 38

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DEV Community • 2026-04-09 18:08

🚀 Building an AWS Cognito MCP Server (Model Context Protocol) – CLI & Manual Setup Guide

Modern AI apps need secure, scalable, and context-aware integrations. That’s where MCP (Model Context Protocol) comes in — and when paired with AWS Cognito, you get a powerful authentication + knowledge retrieval pipeline. In this post, I’ll walk you through: What MCP is 🤔 Why it’s useful How to set up an AWS Cognito MCP server Two methods: ✅ Using AWS CLI ✅ Manual (Console-based) setup ...

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3m read
Can Rust Have Zero-Cost Dependency Injection?
DEV Community • 2026-04-09 18:07

Can Rust Have Zero-Cost Dependency Injection?

Overview This article explores whether dependency injection (DI) can exist in Rust without sacrificing the language’s core philosophy of zero-cost abstractions. We will approach the question from three angles: Why dependency injection still matters in Rust, even for systems built with zero-sized types and compile-time guarantees. How DI evolved in other ecosystems, using Java as a ...

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