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Self-hosted analytics on Coolify with Umami
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DEV Community · Technology

Self-hosted analytics on Coolify with Umami

When we launched dacforge.com two days ago we shipped it with no analytics. No Google tag, no Plausible, no anything. The privacy posture on the home page said "we run our own infrastructure"; putting a third-party tracker on the site would have been a visible contradiction on line one. Two days in...

DacForge
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The Ultimate NumPy Course: Zero to GPT in Pure NumPy
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DEV Community · Technology

The Ultimate NumPy Course: Zero to GPT in Pure NumPy

I spent months building the NumPy course I wish existed when I was learning. **393 cells. 18 chapters. Zero to GPT in pure NumPy. One interactive notebook that takes you from "what is an array?" to implementing neural networks, transformers, and GPT from scratch — no frameworks, no hand-waving. In...

Kudo Shinchi
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Implementing Auto-Retry for Agent CLIs like Claude Code and Codex
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DEV Community · Technology

Implementing Auto-Retry for Agent CLIs like Claude Code and Codex

Implementing Auto-Retry for Agent CLIs like Claude Code and Codex Auto-retry might seem like a simple switch, but in real-world engineering, it's anything but. Hello everyone, I'm Yu Kun, creator of HagiCode. Today, let's skip the fluff and talk about how auto-retry for Agent CLIs like C...

Hagicode
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Story of Black British music writ large in first exhibition at V&A East
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The Guardian · World

Story of Black British music writ large in first exhibition at V&A East

Museum says The Music is Black is part of a push to reposition scene as central to UK’s cultural historyJacqueline Springer is standing in the middle of the V&A’s new exhibition space looking wistfully at a pair of drainpipe trousers, a tailored suit jacket and a porkpie hat, which create the un...

Lanre Bakare Arts and culture correspondent
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Central bank bosses enlist for war game to gauge threat of Lehman-style bust
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The Guardian · World

Central bank bosses enlist for war game to gauge threat of Lehman-style bust

Finance chiefs to join exercise in Washington designed to assess how they would handle collapse of significant bankThe bosses of the central banks and treasuries of the UK, US and EU are to take part in a war game in Washington on Saturday to test how they would handle the collapse of a globally sig...

Richard Partington in Washington
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The ‘Lonely Runner’ Problem Only Appears Simple
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Wired · Technology

The ‘Lonely Runner’ Problem Only Appears Simple

Take a group of runners circling a track at unique, constant paces. Answering the question of how many will always end up running alone, no matter their speed, has vexed mathematicians for decades.

Paulina Rowińska
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Building Apps That Act on Behalf of OSC Users (OAuth + PKCE in 50 Lines)
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DEV Community · Technology

Building Apps That Act on Behalf of OSC Users (OAuth + PKCE in 50 Lines)

Most cloud platforms lock you into a single-tenant model. Your app gets one set of credentials. Every user's data, every provisioned resource, every database lives inside your workspace. You pay for it, you own it, and you carry the blast radius when something goes wrong. Open Source Cloud (OSC) wo...

Jonas Birmé
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$60K Billed in 13 Hours: Why Leaked Firebase Keys Keep Killing AI-Built Apps
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DEV Community · Technology

$60K Billed in 13 Hours: Why Leaked Firebase Keys Keep Killing AI-Built Apps

A Japanese dev just got billed roughly $60,000 (~9 million yen) in 13 hours because a Google API key leaked from their Firebase + Gemini app. I saw the post trending on Qiita this morning and my stomach dropped — not because it's a new story, but because I've seen the exact same mistake every single...

ayame0328
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Curing App Fatigue: How I Built a Unified AI Inbox
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DEV Community · Technology

Curing App Fatigue: How I Built a Unified AI Inbox

Curing App Fatigue: How I Built a Unified AI Workspace Constantly jumping between Gmail, Slack, and Teams to keep up with work kills focus. I built CortexSage to fix this fragmentation, creating one quiet place where you can handle all your communication without the tab switching headach...

cortexsage
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Multi-site schemas: lessons from evolving one large system over time
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DEV Community · Technology

Multi-site schemas: lessons from evolving one large system over time

Multi-site schemas: lessons from evolving one large system over time I worked on a large multi-site system where the data model had to evolve as the product grew. It started out simple, but as always, with progress the demand also grew to something that allowed flexibility. The progress...

Istvan Szabo
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I Built a Voice-Controlled AI Agent That Runs Entirely on Your Machine
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DEV Community · Technology

I Built a Voice-Controlled AI Agent That Runs Entirely on Your Machine

No cloud. No API keys. Just your voice, a local LLM, and a clean pipeline that actually works. The Idea Most AI assistants are cloud-dependent. You say something, it goes to a server somewhere, gets processed, and comes back. That works fine — until you care about privacy, l...

Manish Reddy
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EcoMark - Discover your environmental footprint
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DEV Community · Technology

EcoMark - Discover your environmental footprint

This is a submission for Weekend Challenge: Earth Day Edition EcoMark – A Simple Way to Reflect on Our Carbon Footprint What I Built For this challenge, I built EcoMark, a lightweight web app that helps people quickly understand their everyday environmental impact. The idea w...

Mitchel Techie
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I Built “Sousa” — a Detective-Style Investigation Board App
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DEV Community · Technology

I Built “Sousa” — a Detective-Style Investigation Board App

You know that board from crime dramas? I made it into an app. You’ve probably seen it in crime dramas and movies — a whiteboard covered with suspect photos, evidence, and strings connecting everything together. I turned that idea into an app. It’s a digital investigation board where you...

Apu & Opu
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I Measured the Carbon Footprint of My AI Agents. 87% Was Pure Waste.
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DEV Community · Technology

I Measured the Carbon Footprint of My AI Agents. 87% Was Pure Waste.

This is a submission for Weekend Challenge: Earth Day Edition Every token your agent burns is a small amount of coal somewhere in a datacenter. I got curious about the math and then horrified by the answer. I already maintain ContextClaw, a context-management plugin for OpenClaw that classifies ev...

signalscout
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PostgreSQL Backup and Recovery: A Complete Guide
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DEV Community · Technology

PostgreSQL Backup and Recovery: A Complete Guide

Your database has never failed. That's not because you're careful. It's because you haven't been running long enough. Hardware dies. Disk controllers corrupt data silently for weeks before anyone notices. An engineer runs a DELETE without a WHERE clause on production. A cloud provider has a multi-z...

Yasser B.
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Will AI Really Replace Web Developers in 2026? An Indian Agency Owner's Take
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DEV Community · Technology

Will AI Really Replace Web Developers in 2026? An Indian Agency Owner's Take

Originally published on [Infinite Option] I run a web development agency in Howrah, India, and wanted to share this with the wider developer community here. Overview The question of whether AI will replace web developers has become one of the most urgent conversations in the tech indu...

Aniruddha Pramanick
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How I Cut My AI Chatbot Costs by 55% With One Architecture Change
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DEV Community · Technology

How I Cut My AI Chatbot Costs by 55% With One Architecture Change

TL;DR: I split one big GPT-4o-mini call into two small, specialized calls. Tokens per message dropped from ~1,820 to ~830. Projected cost went from $300/1M messages to $140/1M messages. Here's exactly how. The $300 Problem I'm building Provia, an AI-powered e-commerce platform where a...

Ali Afana
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