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DEV Community • 2026-04-21 13:04

The Engineering Math Behind Energy Recovery Wheels: Decoding ASHRAE Effectiveness Formulas

Energy recovery wheels can achieve up to 80% total effectiveness in ideal conditions, but that number hides complex thermodynamic interactions between temperature and humidity transfer that many engineers oversimplify. The Formula The ASHRAE effectiveness formulas for energy recovery wheels represent elegant applications of heat and mass transfer principles. The sensible effectiveness ...

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5m read
How I Decide Whether Module Federation Is Worth It
HackerNoon • 2026-04-21 13:04

How I Decide Whether Module Federation Is Worth It

Module Federation enables cross-framework UI sharing, but adds complexity. Use it only when reuse and independent scaling outweigh the costs.

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1m read
Hacker News: Front Page • 2026-04-21 13:02

Tindie store under "scheduled maintenance" for days

Article URL: https://www.tindie.com/ Comments URL: https://news.ycombinator.com/item?id=47848195 Points: 8 # Comments: 0

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1m read
What if you could lay out UI without CSS? Meet Pretext
LogRocket Blog • 2026-04-21 13:00

What if you could lay out UI without CSS? Meet Pretext

CSS wasn’t built for dynamic UIs. Pretext flips the model by measuring text before rendering, enabling accurate layouts, faster performance, and better control in React apps. The post What if you could lay out UI without CSS? Meet Pretext appeared first on LogRocket Blog.

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1m read
Moving past bots vs. humans
The Cloudflare Blog • 2026-04-21 13:00

Moving past bots vs. humans

As AI assistants and privacy proxies challenge the capabilities of traditional bot detection, the Web needs new models for accountability. We believe that control should remain with the client, and that an open ecosystem of anonymous credentials is key to preserving user privacy while protecting origins from abuse.

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1m read
5 Places where Mature SOCs Keep MTTR Fast and Others Waste Time
The Hacker News • 2026-04-21 13:00

5 Places where Mature SOCs Keep MTTR Fast and Others Waste Time

Security teams often present MTTR as an internal KPI. Leadership sees it differently: every hour a threat dwells inside the environment is an hour of potential data exfiltration, service disruption, regulatory exposure, and brand damage.  The root cause of slow MTTR is almost never "not enough analysts." It is almost always the same structural problem: threat intelligence that exists

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1m read
The "Platform Tax" Is Real - Why Developers Are Moving Back to AWS (2026)
DEV Community • 2026-04-21 12:56

The "Platform Tax" Is Real - Why Developers Are Moving Back to AWS (2026)

There's a phrase we keep hearing in founder Slack groups, Reddit threads, and Twitter conversations about infrastructure costs. It comes up when someone posts their monthly Vercel bill, or when a seed-stage startup realizes they're spending $400/month on Railway for a workload that would cost $120 on AWS. The phrase is: "The Platform Tax." It's not an official term. No pricing page calls it that...

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11m read
How to Create a Zero Knowledge DApp: From Zero to Production, Case 1: zk Escrow
DEV Community • 2026-04-21 12:54

How to Create a Zero Knowledge DApp: From Zero to Production, Case 1: zk Escrow

This article is about understanding an end-to-end zk application from a full-stack, end-to-end perspective. It uses the ZK Escrow Release repository as the concrete example, and walks through one escrow flow from the business problem, to the contract, the circuit, the frontend, the verification layer, and finally on-chain consumption. The goal here is not to walk through the code line by line, a...

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35m read
Hacker News • 2026-04-21 12:53

Show HN: Antenna – RSS reader with a built-in MCP server

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1m read
DEV Community • 2026-04-21 12:53

Building the Backend for a Spatial Memory Network: Lessons from the Trenches

Building the Backend for a Spatial Memory Network: Lessons from the Trenches Alright, let's talk about building a spatial memory network backend. If you've been following my journey, you know that my AR memory app idea got a serious reality check when I discovered GPS accuracy isn't what Hollywood makes it out to be. But here's the thing - the backend? That's where the real magic happen...

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10m read
Tired of closed-source notes like Obsidian, Typora, and Notion? I vibe-coded MindZJ: A fully free & open-source note-taking app!
DEV Community • 2026-04-21 12:50

Tired of closed-source notes like Obsidian, Typora, and Notion? I vibe-coded MindZJ: A fully free & open-source note-taking app!

Ever felt like no matter how many note-taking apps you try, none of them hit the sweet spot? Notion is powerful, but you don't own your data. Typora is incredibly lightweight, but lacks robust knowledge base management. Obsidian is fantastic, but it's closed-source and limits your ultimate customization freedom. Over the past few weeks, I used AI vibe coding to build a fully free, open-source, an...

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3m read
DEV Community • 2026-04-21 12:48

Amazon Is Killing Fire TV Stick Sideloading: How It Works and What You Can Do About It [2026]

Amazon just broke sideloading on the Fire TV Stick, and they did it on purpose. Recent Fire OS updates have been quietly blocking sideloaded apps from running, and the fire TV stick sideloading community is rightfully angry. Amazon calls it a security measure. I call it what it is: a platform lockdown play dressed up in safety language. I've spent years building on Android-based platforms and I've...

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7m read
DEV Community • 2026-04-21 12:48

The Night OpenClaw Completely Ghosted Me: My Real Headache Story as a Kolkata AI Agent Engineer

Hey DEV Community 👋 I’m ANIRUDDHA ADAK (@aniruddhadak on X), final-year B.Tech CSE student at BBIT Kolkata and a full-time AI Agent Engineer who lives and breathes this stuff. After my last post about the 30 wins that made OpenClaw my 24/7 lobster-powered sidekick , I promised myself I’d also share the messy, frustrating, headache-inducing side. Because let’s be real — no tool is perfect, es...

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4m read
Fonctionnement d’une blockchain — Étape 2/8 : Réception par les nœuds & contrôles de base
DEV Community • 2026-04-21 12:47

Fonctionnement d’une blockchain — Étape 2/8 : Réception par les nœuds & contrôles de base

Les nœuds (ordinateurs du réseau) reçoivent la transaction et effectuent des vérifications rapides : signature valide ? solde suffisant ? format correct ? Si tout est valide, ils placent la transaction dans une file d’attente appelée mempool (zone d’attente des transactions en cours). Qu’est-ce que la mempool ? La mempool est une zone temporaire où les transactions attendent d’être...

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1m read
Let's check vibe code that acts like optimized C++ one but is actually a mess
DEV Community • 2026-04-21 12:44

Let's check vibe code that acts like optimized C++ one but is actually a mess

The value of a skilled developer is shifting toward the ability to effectively review code. Although generating code now is easier than ever, evaluating it for proper decomposition, correctness, efficiency, and security is still important. To see why it's important to understand generated code and to recognize what lies beneath a program's elegant syntax, let's look at a small project called marku...

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31m read
DEV Community • 2026-04-21 12:44

From Digital Ghost Towns to Memory Palaces: My Second Attempt at AR Memory Magic

From Digital Ghost Towns to Memory Palaces: My Second Attempt at AR Memory Magic Honestly, when I first built spatial-memory, I thought I was creating the next big thing in augmented reality. I mean, pinning multimedia memories to real-world GPS locations? It sounds like something out of Black Mirror, right? People would walk through their neighborhoods and see little video memories flo...

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9m read
The State of AI Instruction Quality
DEV Community • 2026-04-21 12:41

The State of AI Instruction Quality

Everybody has opinions about AGENTS.md/CLAUDE.md files. Best practices get shared. Templates get copied, and this folk-type knowledge dominates the industry. Last year, GitHub analyzed 2,500 repos and published best-practice advice. We wanted to go further: measure at scale, publish the data, and let anyone verify. When the agent doesn't follow instructions and does something contradictory, t...

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12m read
DEV Community • 2026-04-21 12:40

How We Certify AI Reliability With One Number — Conformal Prediction for LLMs (Open Source)

Preview text: Most AI teams ship with dashboards, eval suites, and a strong opinion. We wanted something harder to argue with: one number, backed by conformal prediction, that tells us whether an AI system is ready to ship. AI teams do not have a benchmark problem. We have a deployment problem. Once a model leaves the lab and lands inside a product, a workflow, or an agent, the real question is...

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11m read
DEV Community • 2026-04-21 12:40

I built a security scanner that outputs Claude Code prompts to fix each vulnerability

I built a security scanner that outputs Claude Code prompts to fix each vulnerability The problem Every security scanner I tried fell into one of three buckets: Enterprise-priced — Qualys, Detectify, Snyk enterprise: $1k-10k/year. Overkill for a solo project. DIY — OWASP ZAP, Burp Suite: great, but a full weekend to set up and tune. Free but useless — SSL Labs, Mozilla Obse...

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1m read
DEV Community • 2026-04-21 12:38

Shift-Left Chain Enforcement: Blocking Vulnerability Chains at Commit Time

Based on the CSA/SANS document "The AI Vulnerability Storm: Building a Mythos‑ready Security Program" (April 2026) The Problem: Detection After the Fact Is Too Late The previous article in this series covered how chain analysis changes vulnerability prioritization at scan time. But there is a harder version of the same problem: what happens when vulnerable code is already in the rep...

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6m read
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