Echo grows up and becomes Hey, Reachy
Echo started as a companion-platform idea: memory, proactive behaviors, a model picker, a lot of surface area. When I picked it back up I wanted the o…
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What I Learned Building an Autonomous Deal-Hunting Agent System
Over the past week I built a multi-agent AI system that autonomously scans the internet for bargains, estimates the true value of products using three…
I built an anime ranking site that measures real buzz, not marketing hype
Most anime ranking sites show you what's being promoted . The big seasonal titles, the ones with the biggest ad budgets, the ones every site agrees on…
You don't need pandas to see what's in a CSV — I built a zero-dep CLI for it
Someone drops a CSV export in your lap. Before you can do anything with it you need the basics: how many rows? what are the columns? which ones are mo…
Decisions, dead-ends & dreams
Your AI assistant is sharp in the moment and blank by morning. Neonmem gives it a memory that lives with your project — and the interesting part isn't…
I got burned by an EOL Node.js version in prod. So I built a tracker.
Last year, a security audit uncovered a vulnerability in our production environment. The finding: we were using Node.js 16, a version that had been ne…
Stop pasting JWTs into random websites — I built a zero-dep CLI to decode them in your terminal
You're debugging an auth issue. There's a JWT in a log line, or in an Authorization header you copied out of the network tab. You need to know two thi…
I built a WordPress AI chatbot where the free tier isn't a trial. Here's the design story.
This is a design story about a plugin I built, not a review of it. I want to be upfront about that, because the most useful parts here are the decisio…
Overwhelmed by Overengineering in Project Tracking Tools. The Result? I Built a Lightweight, Local-First Project Tracker.
Hey everyone 👋 I want to give a massive shoutout to AI — it has injected a whole new level of passion and joy into coding for a non-tech guy like me. …
I built a free SEO + AI-search (GEO) audit tool — no signup, no limits
I kept hitting the same wall: every SEO tool either paywalls the useful parts or caps you at a few pages. So I built a free one — freeseoaudit.vercel.…
I tracked every GitHub traffic spike for my open source LLM proxy for 7 weeks. Then I did the exact same thing again, and it worked again.
When I shipped Trooper , a privacy-aware LLM proxy written in Go, I didn't have a marketing plan. I had GitHub traffic analytics and a habit of checki…
Why we open sourced our Slack agent (and what we learned about the AI coworker space)
We open sourced Centaur last month—a Slack agent we built for our own investing and engineering work. Over the past few months it's grown to 100-150 d…
Stop Rewriting UI Components for Every Project
Ever started a new project and found yourself rebuilding the same modal, dropdown, toast notification, tabs, and switches for the 20th time? I got tir…
I scraped Chrome Web Store reviews to find abandoned extensions that still have 100k+ users
I've shipped 4 Chrome extensions and 2 VS Code extensions. The advice that always sounds smart — "find a popular extension the dev abandoned, rebuild …
Turn any PHP host into a gateway to your local network with host2gateway
Ever wanted to turn a simple PHP host into a gateway for your local network? I built host2gateway to do exactly that. ProfiDE / host2gateway Uses a PH…
UVS: a draw's fairness as a fact you can recompute — not a certificate you trust
I've built casino slot machines and gaming systems for 15 years. I mostly stayed away from compliance, but once I had to write the official algorithm …
I built a free cybersecurity scanner that gives any website a security score — here's how
I spent the last few weeks building SecureCheck AI — a free web-based cybersecurity intelligence platform for developers. Here is what it does: Paste …
LifeLine Loop — AI-Powered Food Rescue Platform
Problem We Solved Every year, millions of tons of perfectly edible food are wasted across India from restaurants, weddings, hostels, corporate cafeter…
I built an offline wiki that fits in a single 19 KB HTML file
I kept hitting the same wall looking for an offline wiki. Kiwix is great, but it's an app plus multi-GB ZIM files. IPFS needs connectivity and setup. …
Samiksha AI: Universal Review & comment Analyzer
Hey DEV Community! I recently participated in a hackathon and built Samiksha AI , a universal review and comment analyzer designed to turn messy custo…
Building BookVerse AI: An Intelligent Book Recommendation System
Finding the next book to read can be overwhelming. To solve this, I built BookVerse AI, a content-based book recommendation system web application wit…
[NEW] I spent 3 months teaching AI agents my codebase. They forgot by morning. Every. Single. Day.
Every morning for three months, the first thing I did was re-explain myself to my own tools. Not the code. The code was fine. I mean everything around…
Simulating 2G to build an offline-first sync engine in Rust for rural clinics
hey dev.to, so I am Mathéo, a 2nd year CS student at EPITECH Nancy (France). I want to share a project I have been building for the last few months: Z…
I Built a Django-Inspired Web Framework in Rust — Here's What I Learned
If you've ever used Django, you know the feeling: one command, and you have an admin panel, an ORM, form validation, middleware, session handling — ev…
How I built a website vulnerability scanner for UAE PDPL compliance as a solo founder
I'm Akilesh Nairy, founder of Monarc (usemonarc.com) — a cybersecurity platform I've been building solo since February 2026. The problem I kept seeing…
Translating 'I missed you' so it doesn't land like a form letter
I was trying to tell someone something real in her first language — not "I missed you" from a dropdown, but the version that sounds like a person said…
What I learned building a take-home pay calculator for all 50 US states
I built a free paycheck calculator because the existing ones annoyed me. Half of them are buried under ad units, and the other half want your email be…
IONA OS: Building a sovereign operating system in Rust from scratch – No token, no ICO
I started writing IONA OS on a random night, 13 years ago. Back then, as now, I had no team. I never took money from venture capital funds. And I neve…
AltiVerse: Simulating Alternate Realities for Real-World Decisions
Github: https://github.com/LeoTheAIDev/Altiverse What if you could test a major decision before actually making it? Not with a spreadsheet. Not with a…
Why I stopped copy-pasting JSON into online converters and built TypeMorph
Why I stopped copy-pasting JSON into online converters and built TypeMorph Every developer has done it. You grab a JSON response from an API, paste it…