Morning.dev

When my RL agent started writing about Star Wars instead of fixing servers

DEV Community • 2026-04-26 10:54

When my RL agent started writing about Star Wars instead of fixing servers

A Sunday-morning postmortem on teaching a 3B model to do enterprise IT triage with GRPO. It's 1 AM on a Sunday. The Meta × PyTorch OpenEnv Hackathon submission is due at 5 PM. My training logs show a loss curve that's been flat at 0.0 for the last thirty minutes. A flat loss in supervised learning means convergence. A flat loss in reinforcement learning usually means something else: your model h...

0 0

11m read

DEV Community • 2026-04-26 10:53

I Built a Suite of 6 Financial Tools in My Browser Stack — Here's the Architecture

I Built a Suite of 6 Financial Tools in My Browser Stack — Here's the Architecture KashVector is live. Six free, client-side financial tools at kashvector.com. No login, no backend database, no data leaving your device. Everything runs in the browser. I came back to coding after 15 years away — last time I wrote software was mobile apps before the iPhone. I used Claude Code as my devel...

0 0

6m read

DEV Community • 2026-04-26 10:53

What I learned about Claude Code Skills

This is for people who are already using Claude Code and want more control over output quality. I spent today playing with Claude Code Skills. Here's what I picked up. Three things I'll cover: What Skills are and how they work How to use them Best practices and pitfalls What are Skills In one line: a way to organize context and hand only the relevant expertise to Claude. Why this...

0 0

2m read

DEV Community • 2026-04-26 10:53

I got tired of begging my team to review PRs so I built a leaderboard

In every dev team I've worked in, the same 2-3 people did all the PR reviews while everyone else stayed quiet. PRs sat unreviewed for days, senior devs got burnt out, and nobody talked about it openly because it felt awkward to call people out. What it does Tracks PRs reviewed, lines of code touched, and inline comments per developer Scores everyone on your team and shows a live leaderboard for...

0 0

1m read

850x Faster PostgreSQL Writes With One Line of Python

DEV Community • 2026-04-26 10:51

850x Faster PostgreSQL Writes With One Line of Python

Every Python developer loading data into PostgreSQL hits the same wall. executemany() with 1M rows? 16 minutes. df.to_sql()? Same thing — it generates INSERT statements under the hood. Even method='multi' with chunking is slow because each batch is still a SQL statement parsed by the server. PostgreSQL has had a faster path since version 7.x: the COPY protocol. It bypasses the SQL parser entir...

0 0

3m read

DEV Community • 2026-04-26 10:51

Building an AI Room Design Tool: 4 Things That Took Way Too Long

I've been heads-down for the last few months on Deroom AI, an AI room design tool that turns a single photo of your real room into a photorealistic redesign in 30 seconds. The 0→1 build was way harder than I expected and along the way I changed my mind about a bunch of things. These are the four that cost me the most time. 1. Generic image generation is the wrong primitive The first ve...

0 0

3m read

Hacker News: Front Page • 2026-04-26 10:50

Asahi Linux Progress Linux 7.0

Article URL: https://asahilinux.org/2026/04/progress-report-7-0/ Comments URL: https://news.ycombinator.com/item?id=47909226 Points: 9 # Comments: 0

0 0

1m read

DEV Community • 2026-04-26 10:48

Why Docker is No Longer Optional: Moving from "It Works on My Machine" to Production

Every developer has been there: you spend hours perfecting a Python or Flask application, it runs beautifully on your laptop, but the moment you try to host it on a server, everything breaks. Missing dependencies, version mismatches, and environment errors take over. In 2026, the solution isn't just "fixing the server"—it’s Containerization. 1. The Death of Manual Deployment Back in t...

0 0

2m read

DEV Community • 2026-04-26 10:48

Giving README-Driven Development Superpowers with bbt

Back in 2010, Tom Preston-Werner published his now classic article “Readme Driven Development”. He starts from a simple idea: good implementation matters, but building the right software matters even more. A perfect implementation of the wrong specification is worthless. Tom’s surprising answer is: write your README first The reasoning is very similar to BDD: before it’s a way to communi...

0 0

5m read

DEV Community • 2026-04-26 10:46

Testing Emails in 2026: Why I Built a Better Mailcatcher (And Why You Should Switch)

We've all been there: you're developing a new feature—like a registration flow or a "forgot password" function—and you need to verify that the emails look right and contain the correct links. Using real SMTP servers during development is a hassle and comes with the constant risk of accidentally emailing real users. The Problem with the Current Landscape I spent a lot of time using tool...

0 0

3m read

My RX Line Was Stuck High, and TX_EN Was the Fix

DEV Community • 2026-04-26 10:41

My RX Line Was Stuck High, and TX_EN Was the Fix

I was working on CH32V00X integration for tinyboot on my newly fabricated CH32V006 OpenServoCore dev board, thanks to the generous sponsorship from PCBWay. The UART controller of this chip shares the same silicon and thus reuses the same tinyboot HAL driver as the CH32V003. However, the tinyboot CLI couldn't talk to the flashed bootloader via UART at all. This is strange... Same UART silicon, same...

0 0

7m read

Building a Timezone Converter Chrome Extension: Convert Time Case Study

DEV Community • 2026-04-26 10:41

Building a Timezone Converter Chrome Extension: Convert Time Case Study

There are over 400 timezones. I built a Chrome extension that handles all of them on hover. Here's what I learned. Key Metrics Metric Value Installs 267 Timezones Supported 400+ User Action Required 1 hover Time Saved ∞ The Problem I saw many people in reddit forums, constantly tripping over timezone math. Every call, every deadline, every "let's sync at ...

0 0

3m read

DEV Community • 2026-04-26 10:37

“From Narrow AI to Agentic AI: The Shift Highlighted at Google Cloud Next 2026”

This is a submission for the Google Cloud NEXT Writing Challenge We often think AI is already very advanced — but what if we are still just at the beginning? You know, I am a very imaginative person. I am always curious about futuristic scenarios — how AI will evolve, how it will think, and how it might change our lives. Earlier, I believed AI was mostly about tools like ChatGPT and Google Gemi...

0 0

3m read

DEV Community • 2026-04-26 10:36

I built a calculator. Then Google rejected my $25 payment 50 times before I could even create an account to submit and launch it

I'm Rishi. Founder of Origin Empire. I built OriginCalc. Not a basic calculator. A complete toolkit. 5 calculators. 12 converters. 160+ currencies. TTS. Dark mode. History. Notepad. Free. No ads. No data collection. Works offline. After building it, I went to Google Play Console to pay the $25 registration fee and create my developer account. Before even creating my account, I was rejected. ...

0 0

1m read

DEV Community • 2026-04-26 10:32

Stop Wasting Time Setting Up Flutter Projects: How to Solve the "Start from Scratch" Problem

Every mobile app developer knows the pain: you have a brilliant idea for a new app, but before you can write a single line of feature code, you have to spend hours just setting up the project. Configuring folder structures, setting up state management, defining a scalable architecture, configuring custom fonts, themes, and handling routing—starting a Flutter project from scratch is repetitive and...

0 0

1m read

DEV Community • 2026-04-26 10:31

Building a Complete Developer Terminal Setup for Claude Code — Part 2: Custom Statusline

Building a Complete Developer Terminal Setup for Claude Code — Part 2: Custom Statusline By Avinash, GenAI Practice Lead | Part 1 | Part 2 of 6 ⚠️ Note: This setup is macOS-specific. All tools, commands, and configurations in this series are tested on macOS (Apple Silicon). Linux and Windows users will need to adapt certain steps, particularly around afplay, brew, iTerm2, and system f...

0 0

3m read

DevSecOps in Practice: Tools That Actually Catch Vulnerabilities - Part 4 - IaC Scanning with Checkov

DEV Community • 2026-04-26 10:28

DevSecOps in Practice: Tools That Actually Catch Vulnerabilities - Part 4 - IaC Scanning with Checkov

The previous parts covered application security — secrets, code vulnerabilities, and dependency CVEs. This part shifts to the infrastructure side. The Terraform in the repo describes the AWS resources the app would run on. If that infrastructure is misconfigured, it doesn't matter how clean the application code is. IaC scanning catches those misconfigurations before terraform apply ever runs. Cod...

0 0

4m read

DEV Community • 2026-04-26 10:24

NCMEC Mandatory Reporting for Online Platforms: What Developers Need to Know

Every online platform that allows user-generated content faces a legal reality that most engineering teams discover too late: if your users can send each other messages, you may be a mandatory reporter under federal law. 18 U.S.C. § 2258A requires Electronic Service Providers (ESPs) to report apparent child sexual exploitation material (CSEM) to the National Center for Missing & Exploited Chi...

0 0

7m read

DEV Community • 2026-04-26 10:21

Why I Stopped Trying to Count "Exactly Right" and Started Subtracting

I've been working through coding problems that I can understand when reading solutions but struggle to solve on my own. This series is about breaking down the "why does this actually work" part. Not tutorials. Just honest breakdowns of where my thinking got stuck and what finally unstuck it. The problem that broke my brain LeetCode 795: Number of Subarrays with Bounded Maximum. You get...

0 0

5m read

DEV Community • 2026-04-26 10:21

Claude Code doesn't make your product better. It makes it bigger.

Shipping faster has never been easier. Shipping better has never been harder. Claude Code is the most impressive code-generation tool I've ever used. It's also the fastest way to turn a clean codebase into an unmaintainable mess if nobody's paying attention. And right now, not enough people are paying attention. The output is not the outcome Ethan Ding recently published a piece argu...

0 0

3m read