Morning.dev

DEV Community • 2026-04-18 01:09

Incident Report: Service failure due to storage full

Yesterday, my homelab server suddenly became unresponsive. It started with a flurry of Discord notifications, the universal signal that something has gone seriously wrong. I found all services offline. The logs pointed to a primary culprit: a Redis failure, specifically a Server Out of Memory error. The core error was: RedisClient::CommandError: MISCONF Errors writing to the AOF file: No space l...

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2m read

DEV Community • 2026-04-18 01:07

QA Engineers Have an Unfair Advantage in Machine Learning

Most ML models don’t fail because of bad algorithms. They fail because no one properly evaluates them. That’s where a QA mindset changes everything. ⸻ Think Like a Tester, Not Just a Builder In ML: Training = writing code Validation = testing & tuning Test set = final regression 👉 Sound familiar? ⸻ ⚖️ The Real Risk Isn’t Accuracy Overfitting → model memorizes data Underfitting → mo...

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⏱ Remote Timer — an easy way to keep time under control

DEV Community • 2026-04-18 01:01

⏱ Remote Timer — an easy way to keep time under control

I recently created Remote Timer because I needed a simple tool to run Scrum events with my team. I hope it’s useful for you too! But Remote Timer is much more than just a sprint timer — it’s perfect for presentations, meetings, speeches, debates, Zoom calls, and any situation where keeping everyone synchronized matters. 🚀 How Remote Timer Works Set the timer duration — from sec...

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DEV Community • 2026-04-18 00:55

From Weekend Hackathon to AWS Global Finalist: Building an AI Tutor That Actually Works Offline

Six months ago, I was debugging a React component at 2 AM when my little sister called from our village outside Addis Ababa. She was struggling with her physics homework and couldn't afford extra tutoring. That moment sparked an idea that would eventually land me as a finalist in AWS AIdeas 2025. The Problem That Wouldn't Leave Me Alone In Ethiopia, quality education is a luxury. Most ...

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A 300-Line GitHub Actions Security Linter: Five Rules That Catch the CVE Patterns

DEV Community • 2026-04-18 00:50

A 300-Line GitHub Actions Security Linter: Five Rules That Catch the CVE Patterns

A 300-Line GitHub Actions Security Linter: Five Rules That Catch the CVE Patterns A focused TypeScript CLI that finds the five .github/workflows/*.yml anti-patterns that account for most real-world Actions compromises — and only those. SARIF 2.1.0 output for GitHub code scanning. actionlint is excellent. If you want a comprehensive GitHub Actions validator — YAML schema, expression t...

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DEV Community • 2026-04-18 00:48

Why I Stopped Logging In to Read Tweets

Someone shares a tweet in a Slack channel. I click. Twitter shows me half the post, then drops a login wall. I close the tab. This happens constantly now. Public content — content that was publicly broadcast, on a public URL — has been quietly converted into gated content. Not by changing what's published, but by changing who is allowed to read without first identifying themselves. I don't think...

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I Built an AI That Texts People Back as Me — and Nobody Noticed

DEV Community • 2026-04-18 00:48

I Built an AI That Texts People Back as Me — and Nobody Noticed

This is a submission for the OpenClaw Challenge. What I Built I built a personal messaging proxy — an OpenClaw agent that monitors my WhatsApp and Telegram, responds to incoming messages on my behalf, and does it so accurately that most people think it’s me. The problem it solves is embarrassingly relatable: I’m a developer. I disappear into focus mode for hours. Mess...

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DEV Community • 2026-04-18 00:45

Vector Databases Explained: A Comparison of Pinecone, Chroma, and Weaviate

Vector Databases Explained: A Comparison of Pinecone, Chroma, and Weaviate A technical deep dive into vector databases, comparing Pinecone, Chroma, and Weaviate, including prerequisites, concepts, and production tips The rise of machine learning and artificial intelligence has led to an explosion of complex data that traditional databases struggle to handle. Vector databases have eme...

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DEV Community • 2026-04-18 00:41

Pulse Check: Real-time Arrhythmia Detection with Isolation Forest and InfluxDB

Ever tried to find a needle in a haystack? Now imagine the haystack is moving at 250Hz, and that "needle" is a life-threatening heart arrhythmia. In the world of wearable technology, handling high-frequency ECG/EKG data isn't just a "big data" problem—it's a "fast data" problem. To keep users safe, we need real-time anomaly detection that can distinguish between a jogger's racing heart and a gen...

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DEV Community • 2026-04-18 00:40

Jibun Corp's AI Hub Hits 31 Providers: Adding Replicate and Coze

Jibun Corp's AI Hub Hits 31 Providers: Adding Replicate and Coze Background Building in public: I've been expanding the AI Hub Edge Function in my "Jibun Corp" life management app. Phase 7 adds Replicate (model hosting platform) and Coze (ByteDance's AI agent platform), bringing the total to 31 providers. What's New Replicate Endpoint: https://openai-...

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Hacker News • 2026-04-18 00:40

Show HN: Irl.rent – What renters pay, not what's listed in SF

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Hacker News • 2026-04-18 00:38

Show HN: PodWarden – A catalog of 9k+ self-hosted apps with one-click deploy

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Hacker News • 2026-04-18 00:37

Show HN: Llama.cpp Tutorial 2026: Run GGUF Models Locally on CPU and GPU

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DEV Community • 2026-04-18 00:33

Midnight Zero-Knowledge Briefing: Dual State Model Developer Walkthrough

The easiest way for me to understand the Dual State Model is I had to stop thinking about what data do I send to the chain and start thinking in terms of what fact does the chain need to verify. In a dual-state system, your application is split into two layers Private State and Public State. Think of the Private State as just that private- where sensitive data lives. This would be things like me...

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4m read

DEV Community • 2026-04-18 00:31

I Bought a Domain That Used to Sell Viagra. Here's My SEO Recovery Log.

I Bought a Domain That Used to Sell Viagra. Now It Teaches Math. I have loved math since I was a kid. Not the performative kind of love — the real kind, where you solve a problem at midnight and feel genuinely better about the world. Algebra made sense to me before poetry did. Systems of equations felt like detective work. Derivatives, when they finally clicked, felt like someone had ha...

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5m read

DEV Community • 2026-04-18 00:29

Hello Dev.to — I’m Emenike Nathaniel I’m excited to officially join this amazing developer community.

I’m a Full Stack Software Developer (MERN Stack), working with TypeScript, React, Node.js, Express, MongoDB, and Vite to build scalable, high-performance web applications. I started from an Electrical & Electronics Engineering background, but transitioned into software development because I’m passionate about building real-world digital solutions that solve problems. 💻 What I Do Full Stack ...

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DEV Community • 2026-04-18 00:21

How I Built a Personal AI Workspace with OpenClaw and Reframed My Development Workflow

When I first came across OpenClaw, I was not looking for another AI tool. Like most developers, I already had access to several. What caught my attention was the idea of control. OpenClaw did not position itself as just another assistant. It presented something more fundamental: a way to build and own your own AI workspace. That distinction is what made me take it seriously. As a frontend develo...

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DEV Community • 2026-04-18 00:20

I Deleted the Button — Migrating Flutter AI Features from UI-Triggered to Hourly Cron Batch

I Deleted the Button — Migrating Flutter AI Features from UI-Triggered to Hourly Cron Batch Introduction I removed the "Run AI Prediction" button from my app. That sounds like a step backward — but it was actually one of the best architectural decisions I made this week. By moving AI inference from UI-triggered calls to an automated hourly cron job (GitHub Actions), I elimin...

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Testing Real-World Go Backends Isn't What Many People Think

DEV Community • 2026-04-18 00:18

Testing Real-World Go Backends Isn't What Many People Think

I've reviewed enough Go backend test suites to notice a pattern. The services with the most unit tests are often the ones with the most production incidents. Not because unit tests cause incidents — because the teams writing unit tests and calling it a day weren't testing the things that actually broke. Production bugs in distributed Go backends don't usually look like "function computed wrong va...

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9m read

Scale-Up vs Scale-Out: Why Every Language Wins Somewhere

DEV Community • 2026-04-18 00:18

Scale-Up vs Scale-Out: Why Every Language Wins Somewhere

I worked with a team that rewrote a critical service from Go to Rust because "performance." Six months later, the service was 30% faster, the team was miserable, and feature velocity had dropped to a crawl. Meanwhile the competitor team, still on Go, had shipped four new features. We did the postmortem eventually. The service handled maybe 2,000 requests per second on a 4-core machine. CPU utiliz...

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