DEV Community • 2026-07-26 15:59

Building SignalHQ: Engineering a Production-Grade Incident Management Platform from Scratch

Most portfolio projects stop after implementing authentication and CRUD operations. Production software doesn't. Engineering teams need systems capable of handling operational failures under pressure. During an incident, dozens of engineers may collaborate simultaneously, permissions must be enforced correctly, every action must be recorded, and changes must propagate instantly across every conn...

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Hacker News • 2026-07-26 15:58

Show HN: Cookbook AI – turn scattered recipe files into a print-ready cookbook

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How Do You Know When AI Is Telling the Truth?
HackerNoon • 2026-07-26 15:57

How Do You Know When AI Is Telling the Truth?

A practical overview of how teams evaluate AI responses using benchmarks, human review, hallucination detection, red-teaming, and continuous testing.

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Google ADK: Introduction to AI Agent Development
DEV Community • 2026-07-26 15:56

Google ADK: Introduction to AI Agent Development

Nota: ✋ This post was originally published on my blog wiki-cloud.co Introduction Artificial intelligence is evolving at an unprecedented pace and is transforming how people and businesses interact with technology. Over the past few years, much of the focus has been on generative AI models, which can create text, images, code, audio, and other types of content from natural language in...

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Hacker News: Front Page • 2026-07-26 15:56

Make an Origami Circuit Board

Article URL: https://spectrum.ieee.org/origami-circuit-boards Comments URL: https://news.ycombinator.com/item?id=49059418 Points: 4 # Comments: 0

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DEV Community • 2026-07-26 15:55

Stop Using `useEffect` for Data Fetching—Please, I Beg You

The Scene It's 2 AM. You're staring at your screen, debugging why your dashboard keeps showing yesterday's data even after you've changed the filter. Your useEffect dependency array looks like a crime scene. You've got three useState hooks just to manage loading, error, and data. You added a cleanup function, but somehow the component still throws that dreaded warning: "Can't perform a ...

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DEV Community • 2026-07-26 15:54

Microsoft 365 Groups vs Distribution Lists vs Teams — When to Use Which

By Suvankar Chakraborty | Principal Engineer — IAM, Modern Workplace & IT Operations The Question That Confuses Every New Microsoft 365 Administrator A new employee joins. Their manager submits an IT request: "Please add Jane to the Marketing team and give her access to the Marketing shared resources." In a well-governed Microsoft 365 environment, this single request involves un...

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Hacker News • 2026-07-26 15:53

Show HN: CheapSecurity – Lightweight, Self-Hosted CCTV for Linux SBCs

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Hacker News • 2026-07-26 15:53

Show HN: A client side PDF and article reader backed by Google Drive

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DEV Community • 2026-07-26 15:52

When Impressive Code Isn't Actually Working: A Vibe Coding Epiphany

- The Setup I've been working on a semantic recall application called VaultAI for AI tools and prompts I've previously used and needed to remember, and somewhere along the way, I realised that I've relied too much on "vibe coding" (describing what I want to code and mostly letting the AI generate the actual implementation) to create a chatbot for recalling those entries via a prompt This has ult...

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DEV Community • 2026-07-26 15:52

That CORS error? It wasn't my code

I learned something interesting while debugging Apache, Express, and CORS. Seeing a CORS error in the browser doesn't necessarily mean your Express CORS configuration is broken. I had a frontend sending requests to an API through Apache: Frontend → Browser → Apache → Express (server.js) The browser was showing a CORS error. My first thought was naturally: “Something must be wrong with my CORS conf...

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Hacker News: Front Page • 2026-07-26 15:51

Design Is Compromise

Article URL: https://stephango.com/design-is-compromise Comments URL: https://news.ycombinator.com/item?id=49059367 Points: 4 # Comments: 0

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DEV Community • 2026-07-26 15:49

Image-layer prompt injection: measuring a defense across 108,015 samples

Most prompt injection defenses guard the text prompt. They inspect the user's message, sometimes the retrieved documents, and they assume everything else arriving at the model is inert data. For a multimodal model that assumption is wrong. The model reads the image too, and an image is a large, high-entropy container that a human reviewer looks at for half a second and waves through. You can hide...

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Built a free CSS Inspector tool for developers, would love your feedback!
Cascading Style Sheets • 2026-07-26 15:48

Built a free CSS Inspector tool for developers, would love your feedback!

I've been building a Chrome extension called InspectMode Pro and would love some feedback from the CSS community. It currently lets you: Inspect any element on a webpage Copy CSS styles Extract colors and identify fonts Download images, SVGs, and icons Generate AI-ready prompts from an element, section, or even an entire website for Cursor, Claude, ChatGPT, Windsurf, and other coding agents...

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DEV Community • 2026-07-26 15:46

I never ran ESXi in production

Most "why Proxmox" content in 2025-2026 is a migration story driven by Broadcom's ESXi pricing changes. The author had a working VMware stack and got priced out. I'm not that author. I evaluated both, picked Proxmox in 2024, and built on it without ever running ESXi in production. Two years in, I'd make the same call. It reads as either incompetent or contrarian until the rest of the post lands. ...

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HackerNoon • 2026-07-26 15:40

Before an AI Can Spend Your Money, Someone Has to Solve KYC for Robots

AI agents can act for users, but payments still require clear answers on identity, authorization, compliance, revocation, and liability.

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Widgets, Live Activities, and Dynamic Island From One Java API
DEV Community • 2026-07-26 15:40

Widgets, Live Activities, and Dynamic Island From One Java API

Widget support was one of the earliest Codename One requests. We dismissed it for years because a widget must render while the application UI is not running. A normal Codename One Component needs the application renderer, event dispatch thread, and live object graph. A home-screen widget gets none of those. What is Codename One? Codename One is an open-source framework for building native iOS, ...

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DEV Community • 2026-07-26 15:37

A Codex Skill That Generates Editable Draw.io Diagrams Instead of Screenshots

Most AI diagram workflows end with a PNG or a screenshot. It may look fine, but the moment the architecture changes, you have to redraw it or regenerate the whole image. I wanted a different workflow: describe a system in natural language, receive a real Draw.io file, and keep editing every node, label, connector, group, and icon. That is why I built drawio-mxgraph, an open-source Codex Skill th...

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DEV Community • 2026-07-26 15:36

The 50KB Problem: Why Government Forms Keep Rejecting Your Photo

There's a deceptively simple bug hiding in plain sight on almost every government form, university portal, and job application site: "Upload a photo under 50KB." No API, no error message explaining why, no tolerance — just silent rejection if you're 2KB over. It sounds like a trivial constraint until you actually try to satisfy it programmatically. File size in bytes isn't a variable you can set ...

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DEV Community • 2026-07-26 15:27

How to Build an LLM Eval Pipeline for Your AI App in 2026

LLM applications fail silently at the semantic level. Standard unit tests verify that functions return values, but they cannot detect if the output is factually wrong, off-tone, or missing steps. Evals fix this by running a prompt, inspecting the output, and programmatically or judgmentally deciding its quality. Why LLM Testing is Different Unit tests break on non-determinism. Temperat...

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