Morning.dev

I Fine-Tuned Gemma 4 for LaTeX OCR. The Success Was the Problem.

DEV Community • 2026-04-21 16:12

I Fine-Tuned Gemma 4 for LaTeX OCR. The Success Was the Problem.

A fine-tuning post-mortem, and three tests that showed me what my model actually learned. Today I fine-tuned Google's gemma-4-E2B-it on the unsloth/LaTeX_OCR dataset using LoRA on a RunPod RTX 3090. Nine hours of training, about $2 in GPU cost, and an adapter uploaded to Hugging Face. The training loss dropped from 13.66 to 0.018. On the test set, the outputs were near-perfect. Then I ran three...

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12m read

DEV Community • 2026-04-21 16:12

How I Prepared for the Terraform Associate Exam with Practice Questions

As part of my 30-Day Terraform Challenge, Day 28 was all about simulating the real exam environment using timed practice exams and using the results to strengthen weak areas before exam day. I completed two full 57-question Terraform Associate practice exams, each under a 60-minute time limit, with no reference materials allowed during the session. Practice Exam Results Practice Exa...

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1m read

Under the Hood: How Bandit SAST Analyzes Your Python Code

DEV Community • 2026-04-21 16:10

Under the Hood: How Bandit SAST Analyzes Your Python Code

Abstract While many developers use security scanners, few understand how they actually "read" code. This article explains the inner workings of Bandit, focusing on its use of the Abstract Syntax Tree (AST) to identify security patterns without ever executing a single line of code. 1. The Core Engine: AST (Abstract Syntax Tree) Unlike a simple text search (which might give many false positives), B...

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2m read

Product Hunt — The best new products, every day • 2026-04-21 16:08

Euphony

Render AI chat data and Codex logs into browsable views Discussion | Link

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1m read

Internal Developer Platforms Are Booming, But Adoption Is Failing

HackerNoon • 2026-04-21 16:07

Internal Developer Platforms Are Booming, But Adoption Is Failing

Most IDPs fail due to poor developer experience, lack of cost visibility, and misaligned workflows. Treating platforms as products drives adoption.

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1m read

Hacker News • 2026-04-21 16:04

Show HN: Four years of my CS degree, typeset in LaTeX (850 pages)

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1m read

DEV Community • 2026-04-21 16:04

Open Source Agents Are Being Weaponized. Nobody's Prepared.

Open Source Agents Are Being Weaponized. Nobody's Prepared. The security incidents at OpenClaw should have been a wake-up call. Instead, they're being treated as growing pains. Peter Steinberger revealed at AIE talks that the project saw 60x more security reports than curl, with at least 20% of skill contributions flagged as malicious. Think about that. One in five code submissions to an agent f...

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3m read

Building a Real Event Bus in VibeCodeArena

DEV Community • 2026-04-21 16:04

Building a Real Event Bus in VibeCodeArena

There’s a moment in every growing codebase where things start to feel… tangled. A button click updates three different parts of the UI. A network response triggers state changes across multiple modules. A login event suddenly needs to notify analytics, UI, cache, and permissions. At first, you wire things directly: loginButton.onclick = () => { updateUI(); trackAnalytics(); refreshDa...

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5m read

DEV Community • 2026-04-21 16:03

Visual Studio Weekly: The Debugger Agent Just Got Serious

Visual Studio 18.5 dropped on April 14, and buried in the release notes is one of the most significant debugging improvements I've seen in years: the Debugger Agent now validates bugs against live runtime behavior instead of guessing from static code. If you've ever spent an hour reproducing a vague bug report just to figure out where to set your first breakpoint, this update changes the game. ...

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6m read

DEV Community • 2026-04-21 16:03

I Repurposed a Coding Agent as a Life Assistant. Then My Twins Came 10 Weeks Early.

April 16, 5:47 AM My twins arrived at 30 weeks. Ten weeks early. About two pounds each. Within minutes they were intubated, lines placed, wheeled to the NICU. My wife was in recovery. My 4-year-old was at home with a babysitter who didn't know what was happening. I was standing in a hallway between two worlds, holding a phone that wouldn't stop buzzing. Morning briefing. Three calendar...

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10m read

From Bugs to Breakthroughs: My Journey Building Timelix

DEV Community • 2026-04-21 16:03

From Bugs to Breakthroughs: My Journey Building Timelix

Over the past two months, my teammates (Mbiydzenyuy Eileen Leila, Ciara Arlette Ologuie) and I have been building an appointment booking application we named Timelix. It’s been an intense but rewarding experience working with Laravel (PHP) and Vue.js. It hasn’t been easy. We’ve faced bugs that seemed impossible at first, moments of confusion, and times where progress felt slow. But through al...

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1m read

HackerNoon - programming • 2026-04-21 16:03

The HackerNoon Newsletter: How to Structure API Documentation (4/21/2026)

4/21/2026: Top 5 stories on the HackerNoon homepage!Read All

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1m read

DEV Community • 2026-04-21 16:03

Two Lines of HTML Give Any Travel Blog or Website a Live Carry-On Size Checker for 75 Airlines

A travel blogger emailed me a few weeks ago asking if she could embed our carry-on size checker directly into one of her posts. She was writing a packing guide for budget airlines and wanted her readers to check their specific bag against each airline without leaving the page. I told her no, because the tool was a full-page Astro component with site-wide styles, a navigation bar, and a footer. It ...

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8m read

Hacker News • 2026-04-21 16:03

Show HN: Verified Deep Learning with Lean 4

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1m read

Product Hunt — The best new products, every day • 2026-04-21 16:02

Seeknal

Data & AI/ML CLI for pipelines and NL queries Discussion | Link

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1m read

DEV Community • 2026-04-21 16:02

Stop Trying to Prompt Your Way Out of a Hallucination

I learned this the hard way. I recently built a personal agent to map dependencies across my local repositories. The goal was simple: ask a question like “Which projects use this specific library version?” and get a clean, reliable answer. What I got instead was something else entirely. The agent responded with confidence. The formatting was pristine. The explanation was coherent. And the answe...

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3m read

DEV Community • 2026-04-21 16:01

I Built a Market Intelligence Agent That Operates a Data Platform Autonomously via MCP

Most AI agent demos follow the same pattern: pre-loaded dataset, clever prompt, nice answer. The infrastructure is invisible and static. I wanted to show something different — an agent that operates the data infrastructure itself. Creates pipelines, ingests live data, manages the lifecycle, then answers questions against what it just built. No pre-loaded anything. This is a working example on to...

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2m read

The AI Agents Roadmap Nobody Is Talking About (2026 Edition)

DEV Community • 2026-04-21 16:01

The AI Agents Roadmap Nobody Is Talking About (2026 Edition)

Introduction 😎 Spoiler alert 🚨 I should probably have called this "How to actually get hired building AI agents in 2026" considering I will be biased towards production systems in this article. Most tutorials teach you how to build a chatbot and then they just... stop. No deployment. No memory. No guardrails. Nothing about what happens when your "agent" hallucinates and tells a custom...

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11m read

Modernizing the Facebook Groups Search to Unlock the Power of Community Knowledge

Engineering at Meta • 2026-04-21 16:00

Modernizing the Facebook Groups Search to Unlock the Power of Community Knowledge

We’ve fundamentally transformed Facebook Groups Search to help people more reliably discover, sort through, and validate community content that’s most relevant to them. We’ve adopted a new hybrid retrieval architecture and implemented automated model-based evaluation to address the major friction points people experience when searching community content. Under this new framework, we’ve made tangib...

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1m read

HackerNoon • 2026-04-21 16:00

The FBI Got Hacked. Here's What That Actually Means

Chinese state-sponsored actors breached the FBI's surveillance coordination systems — not to steal data, but to see who the Bureau was watching. The "Major Incident" designation triggered a whole-of-government response, and the architectural lessons apply far beyond government networks.

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1m read