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"Rails Magic" Isn't Magic. How a Request Actually Travels Through Rails.

A visual, 10-minute deep dive into how Ruby on Rails actually runs under the hood. From Rack middlewares and Zeitwerk autoloading to ActiveRecord schema reflection and the view_assigns bridge.

dev.to·14h ago▲ 12

DEVDEVGeneral

Bank alerts to a day-book, with a local Gemma

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle ...

dev.to·21h ago▲ 26

DEVDEVDevelopment

I Built a New Tab Extension for DEV

I spend a lot of time on DEV these days. Reading posts, finding interesting projects, participating...

dev.to·1d ago▲ 52

DEVDEVGeneral

🐾 DEV Pet Corner #2: Show Us Your Pets!

TL;DR DEV Pet Corner is back for another Sunday! It's a weekly series where we take a little break...

dev.to·1d ago▲ 81

DEVDEVGeneral

Promise Delivered: Welcome to the DEV Hall of Fame (65 Authors, 65 Masterpieces)

Status: Promise delivered ✅ The Doors Are Open A little over a month ago, I published...

dev.to·1d ago▲ 168

DEVDEVAI

Fine-Tuning Qwen3-8B with Tinker: From 50% to 76% Accuracy, and Burning Through My Budget

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle Oktoberfest?...

dev.to·1d ago▲ 65

DEVDEVAI

Dev Opportunity Radar #21: $500K Y Combinator Funding, Bolt Builders Week, and AI Safety Research Residency

TL;DR Welcome back to Dev Opportunity Radar! This is a weekly series where I share opportunities,...

dev.to·3d ago▲ 89

DEVDEVDevelopment

🌑 Blue October

TLDR: A brief summary of how I got here. The Mindset For the last 3 years, I have been...

dev.to·3d ago▲ 26

DEVDEVGeneral

What was your win this week?!

👋👋👋👋 Looking back on your week -- what was something you're proud of? All wins count -- big or small...

dev.to·3d ago▲ 31

DEVDEVDevelopment

What Are Your Chances of Surviving Resident Evil Based on Your Tech Job?

I recently watched the new Resident Evil movie. 🎬 Watching the main character stumble from one...

dev.to·3d ago▲ 105

DEVDEVAI

What I Actually Learn When I Build With AI

I've spent entire nights building something with AI, gotten a bunch of features working, and then...

dev.to·4d ago▲ 51

DEVDEVDevelopment

Natural Languages Have Design Trade-offs Too: Georgian Is Dynamically Typed, English Is Statically Typed

Table of Contents How This Started Feature #1: Articles (or the Lack of Them) The...

dev.to·4d ago▲ 107

DEVDEVAI

I built a lie detector for AI coding agents. Then I read the rules.

When an AI agent commits a change to code, it makes a claim about what it changed: "fixed typos" or...

dev.to·4d ago▲ 37

DEVDEVAI

I Vibe-Coded My Way Out of Angular Upgrades

Do you also hate upgrading Angular versions? Because I do. I maintain a few open-source projects, and...

dev.to·4d ago▲ 86

DEVDEVSecurity

How I Built an Action Game with Godot During a Global Teen Hackathon with Prizes

I had just recently completed a couple of medium-sized projects for Stardance, a global teen...

dev.to·5d ago▲ 13

DEVDEVAI

Requests, Promises, Assertions, and Declarations: Rewriting Our AI Agent Workflow as a 1986 'Committed Speech' Machine

Why do 200-line agent prompts, Asimov's Three Laws, and sequential pre-landing checklists all fail the same way? How Fernando Flores's 1986 Committed Speech, Nuel Belnap's 1977 4-Valued Logic, and Ton…

dev.to·5d ago▲ 27

DEVDEVDevelopment

How Do You Validate `unknown` in TypeScript Without a Schema Library? 🛡️

Hoi hoi! 👋 I'm @nyaomaru, a frontend engineer who is obsessed with gamba. 😸🦐 Recently, I was...

dev.to·5d ago▲ 71

DEVDEVAI

Building Better Agents through End-to-End Evals

Deeply understand the task at hand The biggest mistake teams make with agents is...

dev.to·5d ago▲ 36