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Notes from shipping a real-world PWA in Korea: Vite SSG is worth it. SPAs lose Korean SEO because Naver's crawler doesn't fully render JS. Leaflet > Mapbox for cost-sensitive projects. Free OSM tiles + zero cost. Firebase Hosting rewrites let you have deep URLs (/city/suwon) without a backend. KakaoTalk share is non-negotiable in Korea — 70%+ of social traffic. PWA install banner: don't auto-prompt, let the user discover. Project: https://gyeonggi-currency-map.web.app?ref=devto&utm_source=devto&utm_medium=social&utm_campaign=multi-site-bot

Cuando un SaaS quiere recuperar usuarios de prueba que se quedaron a medio camino, casi siempre empieza por email. El problema es que una sola prueva mal hecha puede mezclar cohortes, disparar métricas falsas y dejar a marketing discutiendo con backend sobre datos que nunca fueron confiables. Ese tipo de campaña merece más cuidado del que parece. A simple vista solo hay que revisar asunto, CTA y enlace final, pero en la práctica también hay que comprobar segmentación, ventanas de tiempo, estados de cuenta y eventos analíticos. Si alguien en tu equipo busca cosas como facebook temp email para crear usuarios rápidos, en el fondo está intentando resolver eso: probar sin tocar bandejas reales ni contaminar reportes. Por qué los correos de reactivación confunden más de lo que ayudan Un correo de reactivación no se envía a cualquiera. Sale cuando una persona creó cuenta, probó algo, se quedó quieta y entra en una regla específica. Si esa regla se valida con datos sucios, el equipo termina optimizando un mensaje para usuarios equivocados. En SaaS esto pega fuerte porque marketing y producto suelen mirar la misma campaña con preguntas distintas. Marketing quiere saber si el copy reabre interés. Producto quiere saber si el usuario vuelve al flujo correcto. Backend quiere confirmar que la automatización no reenvía a quien ya convirtió. Cuando esas capas no se prueban juntas, aveces el correo “funciona” y aun así el experimento sale mal. Si ya estás ordenando tus pruebas de onboarding en SaaS , el siguiente paso natural es tratar la reactivación como un flujo distinto. Tiene otra intención, otra ventana de tiempo y otro riesgo de mezclar datos. Paso a paso para probar una campaña sin mezclar cohortes La forma más segura es preparar un escenario por cohorte. En vez de mandar varios usuarios de prueba al mismo inbox, creá un usuario, asignale una condición clara y validá un solo recorrido de punta a punta. Este proceso suele ser suficiente: Crear una cuenta de prueba que realmen

I've noticed something about myself. It's become much harder to get things done. I see less movement compared to my previous self. And sometimes, when I see people get so much done, tasks, projects, anything, I wonder why I can't make progress like that. Now I'm not comparing myself to Elon Musk here, I'm just wondering if I'm doing my best. For the longest time, I've wanted to build a portfolio website. But for some reason or another, I never actually ended up making it, or should I say, starting it. Whenever I had a free block of time, I wouldn't know where to start. I also have this side project I've been wanting to work on. I started it, then never made any more progress beyond the initial feasibility analysis. Why did I never allocate time to either? The Overthinking Starts Early I wanted the portfolio website to be really good. I wanted cool additions, beyond the usual "about me" and "projects" sections, I wanted things like "songs I'm obsessed with right now" and "last night I slept at." I was also looking if my fitbit has an API to show my live heart-rate on my portfolio (why would someone do that?). I was obsessed with the features, and with using the right tech to make it as efficient as possible. What stack should I even use for a portfolio? Same story with this very blog. Before writing a single word, I was wondering what stack to use. I looked into a ton of existing blogs for inspiration, how do I track views, what about comments, how do I stop a DDoS from flooding my DB if I'm storing comments, should I require auth just to leave a comment, should I support font and background color changes, themes, what's the best tool to do all of that? I've noticed this pattern with almost everything I do. I'm so obsessed with doing things right on the first attempt that I never actually make the first attempt, because "doing it right" is just too demanding. Or a related trap, when I want to do something perfectly , I discover prerequisites, and those prerequisites

OAuth recovery emails look harmless until you test them the lazy way. A team sends password reset links or recovery codes into one shared mailbox, confirms that something arrived, and marks the job done. From a security view, that test is too weak. It can hide token reuse, wrong-user delivery, or log retention that exposes sensitive account events. For non-production checks, I like using a disposable email address that belongs to one test run. Some teams build that inbox layer themselves, some use tempmailso, but the core principle is the same: isolate the recovery event, inspect it quickly, and delete the evidence you no longer need. That is helpful when Authentication and OAuth changes ship together. Why OAuth recovery emails deserve their own threat model Recovery email tests are not just "did the mail send?" checks. They sit on the edge of account takeover risk, so the message itself matters almost as much as the login flow. A decent threat model for these emails should ask: did the message reach only the intended inbox for this run? does the link or code expire when the product says it does? is the message revealing too much user data in subject lines or previews? can an older token still be used after a new recovery request? do logs or test fixtures keep the recovery secret longer than they should? This is where shared inboxes become dangerous in a subtle way. Even if nobody has bad intent, mixed test data makes it harder to prove which token belonged to which request. The same operational confusion shows up in email change confirmation checks , and it gets worse when the email can restore account access. OWASP recommends testing authentication recovery features with the same care as sign-in and session controls, because weak recovery paths are a common bypass route for stronger primary login defenses: https://cheatsheetseries.owasp.org/cheatsheets/Forgot_Password_Cheat_Sheet.html A safer test flow for recovery links and codes The cleanest pattern is one inbox

The $149 Dune keyboard can be a meeting controller at least and a script-executing keypad at best.

The companies’ Fourth of July plans include celebrating new reactor designs coming online. But there’s still a long way to go before they deliver energy at a meaningful scale.

AI that fights customer service for you Discussion | Link

Hi HN, I'm Rob. Contextify indexes every Claude Code and Codex session on your machine into one local, searchable database. The current session, in either tool, can search all of it: /total-recall in Claude Code, $total-recall in Codex. Demo: https://www.youtube.com/watch?v=FvrvRGp4C9M | Mac app: https://contextify.sh (App Store or DMG) | Linux: CLI with a one-line installer, same search. No signup. I split my work between Claude Code and Codex. When I burn through rate limits on one, I switch t

It’s not easy to transplant a whole human eye. The surgery is difficult. And the eyes themselves start to degenerate as soon as they’ve left the body. When surgeons attempted it a few years ago, the newly-transplanted eye wasn’t able to see. But researchers believe they might have a solution: a device that maintains and…