How I used Python to turn a cheap 20$ smartwatch into a PC remote!
DEV Community • 2026-04-19 15:01

How I used Python to turn a cheap 20$ smartwatch into a PC remote!

We’ve all seen them—those $20 Smartwatches on Amazon or AliExpress. They look decent, but they are locked behind sketchy, ad-filled mobile apps. I wanted to see if I could "liberate" the hardware. Today, I’m open-sourcing Synod: A Python-based engine that turns any generic BLE wearable into a dedicated macro deck for your PC. Why build this? Most smartwatches send "UI Notifications" over Bluet...

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2m read
Mastering Modern Hiring Demonstration: Using Docling and PostgreSQL by Bob to Build a Local Candidate RAG Database
DEV Community • 2026-04-19 14:53

Mastering Modern Hiring Demonstration: Using Docling and PostgreSQL by Bob to Build a Local Candidate RAG Database

This blog post’s idea is to explore how to bridge the gap between traditional relational data and unstructured documents to create a powerful hypothetical recruitment tool. Introduction The Candidate RAG System leverages a sophisticated technology stack to turn a folder of resumes into an interactive, searchable knowledge base. By combining Docling’s hierarchical document processing ...

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14m read
How Early-Stage SaaS Teams Build Scalable DevOps Without Overengineering
DEV Community • 2026-04-19 14:52

How Early-Stage SaaS Teams Build Scalable DevOps Without Overengineering

It’s a familiar trap for SaaS teams early on. They watch how companies like Netflix or Amazon build infrastructure, and try to copy them from day one. Good intentions, but the timing was off. Complex systems tend to require time, expertise and maintenance that small teams lack. The result is not faster progress, but slower delivery. Engineers spend more time managing infrastructure than develo...

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9m read
DailyTools247 – 138+ Free Online Tools Every Developer & Creator Needs
DEV Community • 2026-04-19 14:51

DailyTools247 – 138+ Free Online Tools Every Developer & Creator Needs

In today’s fast-paced digital world, we constantly jump between websites just to complete simple tasks — compressing images, converting files, generating text, or formatting code. That’s exactly the problem I wanted to solve. So I built 👉 DailyTools247 A single platform that brings together 138+ free online tools for developers, creators, and everyday users. 🌐 https://www.dailytools247.app/ ...

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1m read
DEV Community • 2026-04-19 14:49

Using CrewAI with Ruby Without the Boilerplate

The Ruby ecosystem has always been great for building clean, maintainable, production-ready systems. At the same time, tools like CrewAI are opening up a new world — multi-agent workflows that can research, generate, and collaborate on their own. Naturally, I wanted to try CrewAI from Ruby. But honestly… the experience wasn’t what I expected. ⚠️ The Gap Using CrewAI in Ruby usual...

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2m read
DEV Community • 2026-04-19 14:48

Pythonでクォータニオンをz-y-x系オイラー角に変換するコード書いてみた

Writing Code to Convert Quaternions to Z-Y-X Euler Angles in Python I needed to calculate Z-Y-X Euler angles from quaternions. Moreover, the task required me to write the code in Python 2.7, so I couldn't use handy tools like scipy.spatial.transform.Rotation. When I did some research, I found a sample code in C++ on Wikipedia. Wikipedia / Quaternion to Euler Angles Conversion ...

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2m read
GenAIOps on AWS: Production Hardening & Advanced Patterns - Part 4
DEV Community • 2026-04-19 14:47

GenAIOps on AWS: Production Hardening & Advanced Patterns - Part 4

Reading time: ~25-30 minutes Level: Advanced Series: Part 4 of 4 - Production Hardening (Series Finale!) What you'll learn: Guardrails, HITL workflows, incident response, A/B testing, canary deployments, and cost optimization for production GenAI systems The Problem: Demo Day vs Day 100 in Production Demo Day (100 requests): Day 100 in Production (1M requests): The gap betwe...

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7m read
DEV Community • 2026-04-19 14:44

Paper 119: Q7 Falsification, Q8/Q9 Empirical Data, and the First Rei-AIOS Failure Record

This article is a re-publication of Rei-AIOS Paper 119 for the dev.to community. The canonical version with full reference list is in the permanent archives below: Zenodo (DOI, canonical): https://doi.org/10.5281/zenodo.19652672 Internet Archive: https://archive.org/details/rei-aios-paper-119-1776609819278 Harvard Dataverse: https://doi.org/10.7910/DVN/KC56RY GitHub source (private): htt...

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13m read
Hacker News: Front Page • 2026-04-19 14:43

Notes from the SF Peptide Scene

Article URL: https://12gramsofcarbon.com/p/notes-from-the-sf-peptide-scene Comments URL: https://news.ycombinator.com/item?id=47824681 Points: 11 # Comments: 2

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1m read
Claude Code on the Web: Why Your .env Vars Don't Reach the Setup Script (and How SessionStart Hook Fixes It)
DEV Community • 2026-04-19 14:41

Claude Code on the Web: Why Your .env Vars Don't Reach the Setup Script (and How SessionStart Hook Fixes It)

TL;DR Environment variables you put in the .env panel of Claude Code on the web (Cloud Sandbox) do not reach the setup script. They only reach the shell inside the running Claude Code session. So git clone "https://x-access-token:${GH_TOKEN}@..." inside the setup script fails — GH_TOKEN is empty at that point. Move the clone into a SessionStart hook and it just works, because by then ...

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6m read
Lobsters • 2026-04-19 14:36

postmarketOS Conference

Comments

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1m read
Hacker News: Front Page • 2026-04-19 14:24

Matt Mullenweg Overrules Core Committers; Puts Akismet on WP 7's Connector List

Article URL: https://www.therepository.email/matt-mullenweg-overrules-core-committers-to-put-akismet-on-wordpress-7-0s-connectors-screen Comments URL: https://news.ycombinator.com/item?id=47824531 Points: 8 # Comments: 0

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1m read
DEV Community • 2026-04-19 14:23

How to Debug AI-Generated Code: A Systematic Approach

The Debugging Trap With AI Code You built something cool with Cursor or Bolt. It worked on the demo. Then a user tried it with a slightly different input — and it blew up. You paste the error into the AI, it confidently rewrites the function, and now a different thing is broken. Welcome to the debugging trap. Research from GitClear and others suggests around 43% of AI-generated project...

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10m read
Every climate chatbot is amnesiac. So I built Aura — a stateful climate coach on Backboard + Gemini
DEV Community • 2026-04-19 14:20

Every climate chatbot is amnesiac. So I built Aura — a stateful climate coach on Backboard + Gemini

Every climate chatbot is amnesiac. So I built Aura — a stateful climate coach on Backboard + Gemini What I built Every behavioral-change tool in the "help you live greener" category I have ever used has the same defect: it forgets. You open the tool, you confess you want to drive less, it produces a tidy encouraging paragraph, you close the tab. Tomorrow the tool greets you like a stra...

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7m read
DEV Community • 2026-04-19 14:19

aIR-Jumper: exfiltran datos de redes air-gap vía cámaras IR

Durante décadas, las redes air-gap fueron consideradas el estándar de oro en seguridad informática. La idea es intuitiva: si una computadora no está conectada a ninguna red, nadie puede atacarla desde afuera. Gobiernos, plantas nucleares, centros de investigación militar y bancos han confiado en este aislamiento físico para proteger información crítica. Pero un paper presentado en el USENIX WOOT 2...

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10m read
DEV Community • 2026-04-19 14:19

Building something simple

At some point, I decided to just build a minimal version for my own use. The goal wasn’t to compete with existing tools — just to have something that: works reliably has predictable pricing is easy to plug into my own scripts After using it for a bit, I realized it might actually be useful for other developers dealing with the same issue. So I cleaned it up and turned it into a small project c...

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1m read
DEV Community • 2026-04-19 14:19

Micro-Frontends with Angular: Is It Worth the Complexity?

Introduction Micro-frontends have gone from a niche architectural pattern to a buzzword every senior frontend developer is expected to have an opinion on. And if you're building with Angular, you've probably wondered: should we go micro-frontend? Is it worth it? Where do we even start? This article gives you an honest, practical answer — including when to use them, when to run away, and...

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5m read
DEV Community • 2026-04-19 14:19

From Classroom to Code: How I’m Building Digital Solutions with Project Management Skills

I started my journey in a classroom, not in a tech company. For five years, I worked as a teacher in Hargeisa. Every day, I was planning lessons, managing time, solving problems, and supporting students. At that time, I didn’t realize I was already building strong project management skills. Later, I transitioned into technology and computer science, and everything started to connect. How Teaching ...

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1m read
DEV Community • 2026-04-19 14:17

I built 10 Claude skills that live-query 27 government company registries

I built 10 Claude skills that live-query 27 government company registries A few months ago I was researching a counterparty across 4 jurisdictions. Three hours of clicking through UK Companies House → Luxembourg RCS → Jersey Companies Registry → Cayman CIMA, copy-pasting ownership percentages into a spreadsheet. By the time I'd pieced the structure together, I wasn't sure whether ...

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7m read
DEV Community • 2026-04-19 14:17

Five Formal Closures + Findings + AI-Generated Open Questions (Rei-AIOS Paper 118)

This article is a re-publication of Rei-AIOS Paper 118 for the dev.to community. The canonical version with full reference list is in the permanent archives below: Zenodo (DOI, canonical): https://doi.org/10.5281/zenodo.19652449 Internet Archive: https://archive.org/details/rei-aios-paper-118-1776608110166 Harvard Dataverse: https://doi.org/10.7910/DVN/KC56RY GitHub source (private): htt...

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15m read
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