Hacker News: Front Page • 2026-04-25 19:38

America's Geothermal Breakthrough Could Unlock a 150-Gigawatt Energy Revolution

Article URL: https://oilprice.com/Alternative-Energy/Geothermal-Energy/Americas-Geothermal-Breakthrough-Could-Unlock-a-150-Gigawatt-Energy-Revolution.html Comments URL: https://news.ycombinator.com/item?id=47903945 Points: 8 # Comments: 2

Hacker News • 2026-04-25 19:37

Show HN: A faster, drop-in replacement for Tailscale's DERP relay

Comments

𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-04-25 19:33

How to notify users about privacy policy changes without spamming everyone

A brief look into our Typescript APIs for managing privacy policy changes submitted by /u/jxd-dev [link] [comments]

DEV Community • 2026-04-25 19:30

I’m thinking of building my own AI-first personal operating system

Lately, I’ve been thinking about the apps I use every day. Mail. Notes. Reminders. Tasks. Calendar. Project management. Invoices. Password manager. Chat. Most of these tools are either owned by big tech companies, locked inside ecosystems, or separated across multiple apps that don’t really understand each other. And honestly, I don’t like depending too much on Google, Microsoft, Not...

DEV Community • 2026-04-25 19:23

Testing Bedrock Guardrails without the AWS bill

Originally published on fakecloud.dev. Bedrock Guardrails are one of the better pieces of AWS infrastructure in the last year. You define a policy — filter out hate, block PII leakage, deny certain topics, enforce contextual grounding on RAG outputs — and either apply it to an entire model invocation via guardrailIdentifier, or call ApplyGuardrail directly on arbitrary text. Useful, sharp, limite...

DEV Community • 2026-04-25 19:21

Three Gaps, One Platform

The terminology, perceptual, and accessibility gaps between typographers and developers — and where paragraf sits §0 — Hook A typographer says: "the colour is unbalanced." A developer opens the style sheet and adjusts the colors on the page. The paragraph is still wrong. Neither person made a mistake. "Colour" in typesetting means the visual density of a paragraph (also c...

DEV Community • 2026-04-25 19:21

Stop Using setuid for Everything: Practical Linux File Capabilities with getcap, setcap, and systemd

Stop Using setuid for Everything: Practical Linux File Capabilities with getcap, setcap, and systemd A lot of Linux software does not actually need full root power. It needs one specific privilege. Maybe it only needs to bind to port 80. Maybe it needs raw sockets. Maybe it needs one network admin action during startup. Reaching for sudo, setuid, or a root-owned service for all of that...

DEV Community • 2026-04-25 19:21

Hello i am amine , a newbie python dev ,hope your doing well

DEV Community • 2026-04-25 19:20

Scan MCP Servers for OWASP Vulnerabilities From Inside Claude. Here's How.

Scan MCP Servers for OWASP Vulnerabilities From Inside Claude. Here's How. Every MCP server tutorial teaches you how to build. None of them teach you how to verify it's secure before deploying. We built Cybersecify — an MCP security scanner you can run from inside your AI assistant. Claude, Cursor, Windsurf, any MCP client. One config line, then ask it to scan. ...

DEV Community • 2026-04-25 19:20

I thought setting up a UK company was the hard part… I was wrong

When I set up my UK Ltd, I thought the difficult part was over. Company registered, done. Turns out… that’s where the confusing part actually starts. Not big problems. Small things that slowly pile up: – HMRC letters you don’t fully understand – not knowing which address is used where – missing important mail without realising – banks suddenly caring about your address setup Nothing breaks ...

DEV Community • 2026-04-25 19:18

Émettre des badges numériques vérifiables avec BADGES.ninja : guide en français pour développeurs et plateformes e-learning

Si vous développez une plateforme de cours en ligne, un LMS, un bootcamp ou tout produit qui délivre des « diplômes » à la fin d'un module, vous êtes probablement en train d'envoyer aujourd'hui un PDF par email. Ça fonctionne, mais ce n'est pas vérifiable, ça s'intègre mal avec LinkedIn, et ça ne résiste pas au temps. BADGES.ninja est une plateforme de credentials numériques conforme au standard ...

DEV Community • 2026-04-25 19:15

Saying "No" Is the Hardest Thing for an LLM — FCoP Gives It Grammar

Saying "no" is the hardest thing for an LLM. FCoP gives it grammar. — Two agents, in a single dev-team incident, used that grammar twice without instruction: one cleanly de-escalated its role; the other discovered field-downgrade-with-body-annotation. Neither was in the rules file. Author: FCoP Maintainers · 2026-04-25 Keywords: FCoP, role offboarding, seat exclusivity, zero-coordination confli...

DEV Community • 2026-04-25 19:15

Emita credenciais digitais verificáveis com BADGES.ninja: guia em português para devs e plataformas EAD

Se você desenvolve uma plataforma de cursos online, um LMS, um bootcamp ou qualquer produto que entregue "diplomas" ao final de um módulo, provavelmente está gerando hoje um PDF e enviando por email. Funciona, mas não é verificável, não se integra bem com o LinkedIn e não resiste ao tempo. BADGES.ninja é uma plataforma de credenciais digitais conforme o padrão Open Badge v2.0 que está disponível ...

Hacker News: Front Page • 2026-04-25 19:11

IPv7: Identity-Centric Network Protocol – IETF Draft and Rust Implementation

Article URL: https://datatracker.ietf.org/doc/draft-subbiah-ipv7/ Comments URL: https://news.ycombinator.com/item?id=47903737 Points: 8 # Comments: 1

DEV Community • 2026-04-25 19:11

Launching a Windows Server on AWS EC2

When people start learning cloud engineering, they often begin with Linux servers and for good reason. But in real-world environments, Windows servers are just as important. From enterprise applications to legacy systems and Active Directory environments, Windows workloads are everywhere. So at some point in your cloud journey, you need to answer this question: Can you confidently deploy and se...

DEV Community • 2026-04-25 19:08

Curated list of Dev Events April-May 2026 - Update

Hey! I compiled and curated a list of developer events for April-May, they are centered on European events in person and are all about the current web paradigm changes or relevant technological innovation. Reaching may we now have 3 more to go, hope you can enjoy May with some events! If you have questions about when, where or ticketing each event has a link to reach them. ...

DEV Community • 2026-04-25 19:08

AI saved a company $500k. The test suite did the actual work.

Many people are sharing the story of Reco that saved $500k a year using AI to rewrite a JavaScript JSONata implementation to Go. But most of those people are sharing the wrong lesson. The headline makes it sound like magic. Take some AI, point it at some old code, get new code, save half a mil. But if you actually read what went down, the magic part wasn't the AI. The Part Nobody Wants ...

DEV Community • 2026-04-25 19:07

Type-safe collections in PHP 8.4: what I wish arrays had

You know the feeling. You're three callbacks deep in array_map, you tack on array_filter, then array_values to fix the keys, and PhpStorm gives up and types everything as array. PHPStan was useful five lines ago. Now it's just nodding politely. I spent six months of weekends building a library to fix this. It's called noctud/collection, it's PHP 8.4+ only, and this post is about why. Th...

DEV Community • 2026-04-25 19:06

DuckDB 1.5.2 and Its Impact on…

Originally published at norvik.tech Introduction Explore the technical enhancements of DuckDB 1.5.2 and how it influences web development practices. What Changed in DuckDB 1.5.2 and Why It Matters The release of DuckDB version 1.5.2 introduces significant bug fixes and performance enhancements, particularly with the support for the DuckLake v1.0 lakehouse format. This ver...

DEV Community • 2026-04-25 19:03

How I Rebuilt a Three-Layer Cache System in Java — Redis, L1, and MongoDB Done Right

I've been working on Nexus, a backend infrastructure project, and recently hit a point where the data synchronization layer needed a serious rethink. What looked like a working cache system turned out to have a broken hierarchy, silent data loss paths, race conditions, and a latent deadlock waiting to happen. This post walks through every problem I found in the original code and exactly how I fix...