Tech Blog - DevRadar

Does open source matter if you still depend on someone else’s infrastructure?

Been thinking about this after looking at different Discord alternatives. A lot of projects advertise themselves as open source but the community still ends up depending on infrastructure controlled by someone else. You can inspect the code or fork it but if moving your members, permissions, data an

Open Source 09-06 1 Reddit r/selfhosted

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Build, Adopt, Build Again: Seven Months of Search in a Personal AI Tool

Introduction Open Walnut is a self-hosted personal AI: tasks, notes, long-term memory, and Claude Code sessions in one web app. Over seven months we replaced its search engine twice. We wrote our own, threw it out for an open-source library, and then wrote our own again on top of two small librari

Backend 09-06 1 DEV Community

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Por que a Prime Video trocou microsserviços serverless por um monólito

Em março de 2023, a equipe de engenharia da Amazon Prime Video publicou um post técnico que causou bastante repercussão na comunidade de cloud: eles haviam redesenhado um de seus serviços internos, saindo de uma arquitetura distribuída baseada em serverless para uma aplicação monolítica rodando em c

Cloud 09-06 1 DEV Community

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Thanks2Go: Building a Human-Approved Gratitude Rail in One Weekend

I used Codex to its fullest potential as a research partner—for code mapping, source comparison, evidence organization, consistency checks, editorial control, and deliverable preparation. I formulated the intent, defined the scope, interpreted the results, arbitrated the conclusions, and preserved e

Frontend 09-06 1 DEV Community

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Building a Secure Personal Gemini Journal with Google Cloud

Most AI apps look impressive in a demo, but building one that is secure, authenticated, and production-ready is a completely different challenge. For my project, I built a Personal Gemini Journal — a private AI-powered journaling application where users can sign in, write their thoughts, chat with

Frontend 09-06 1 DEV Community

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One Missing Environment Variable Crashed My App in Production (and I Lost My Play Store Testing Streak the Same Night)

#BuildInPublic for the RevenueCat Shipaton 2026. RentDera is my entry, and I'm sharing the whole messy journey in public — wins, crashes, and gut-punches like the one below. This post is part of that trail. The setup Today I shipped v1.1.0 of RentDera, my rent-management app for landlor

Frontend 09-06 1 DEV Community

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Lexical Environment in JavaScript

Lexical Environment in JavaScript: A Lexical Environment in JavaScript is a place where JavaScript keeps track of the variables and functions available in a particular scope. It also keeps a reference to the outer scope, so JavaScript can find variables that are not available in the current scop

Frontend 09-06 1 DEV Community

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MY FIRST IDEA

PAWS CONNECT is a comprehensive social platform tailored specifically for pets and their humans. You can check out the live site here: pawsconnect.altervista.org Key Features Pet Profiles: Users can create detailed p

General 09-06 1 DEV Community

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Why LLMs Should Never Touch Money Directly: Building an AI Payment Recovery Agent Solo

How I built REVA for Track 3 of the Razorpay AI Buildathon 2026—and why deterministic guardrails matter more than AI autonomy when money is involved. The Problem I Wanted to Solve Building for Track 3 of the Razorpay AI Buildathon 2026 as a solo developer came with one obvious challen

AI & ML 09-06 1 DEV Community

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How I Turned a Research Paper into an AI Skill with NotebookLM

I wanted to create a reusable AI skill, but I did not want to write vague instructions based on guesswork. I wanted the skill to have a clear foundation. So I started with a research paper and used NotebookLM to understand its main ideas before turning them into a practical skill.md file. Here

AI & ML 09-06 1 DEV Community

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Looking for some opinions on SparkyFitness

I just found out SparkyFitness (haven't tried it yet). I'm looking for some reviews on it from those who've used it? Currently using an Apple Watch, so looking for users along that use case. How's it been? Can it replace Health + Strava? Any functionality comments, etc, are welcome! submitted by

General 09-06 1 Reddit r/selfhosted

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An unquoted heredoc halved my backslashes and turned a character class into the letter w

Same characters typed into two heredocs. The only difference is a pair of quotes around the delimiter. $ cat > unquoted.js <<EOF const re = new RegExp("Desktop\\/(\\w+)"); console.log(String(re)); EOF $ cat > quoted.js <<'EOF' const re = new RegExp("Desktop\\/(\\w+)"); console.

Frontend 09-06 1 DEV Community

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git commit with a pathspec ignored my index and committed the file as it sat on disk

Run this in an empty directory. It takes about fifteen seconds and it is the whole article. $ git init -q . && git config user.email t@t && git config user.name t $ printf 'v1\n' > a.txt && git add . && git commit -qm base $ printf 'v2-staged\n' > a.txt &amp

General 09-06 1 DEV Community

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My Generosity Card: Thank You Everyone

This is a submission for Weekend Challenge: Generosity Edition What I Built I am currently learning web development! for this weekend challenge, I have built a simple and clean "Generosity & Thank You Card" using only HTML and CSS to show gratitude towards people who help others.

Frontend 09-06 1 DEV Community

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A red I expected hid an instrument that was reading an empty directory

One row in my project's coverage table read 0/13. Later it read 0/19. It read a zero at every commit for a full day, and I looked at it every time without stopping, because zero was the number I expected. The work it measures was not finished. A red row on unfinished work is not news. The row was m

Industry 09-06 1 DEV Community

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The Advice Was "Build on Unique Data." Mine Was a House.

A response to Marina Wyss's How I'd Learn Machine Learning in 2026, from someone who arrived at the same checkpoints from the construction side. Marina Wyss wrote that piece and the part that stopped me was not the curriculum. It was her argument that a hiring manager is not looking for evidence th

AI & ML 09-06 1 DEV Community

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My end-to-end test wrote three blocks into the append-only log it was testing

There are three entries in my project's record of what its owner said that the owner never said. $ grep -n 'e2echeck' DB/bands/verbatim/OWNER_VERBATIM.md 817:## #332 (2026-09-05T06:58:22.737Z) session e2echeck 820:## #333 (2026-09-05T06:58:24.338Z) session e2echeck 823:## #334 (2026-09-05T06:58:2

General 09-06 1 DEV Community

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My build record kept the word pass and dropped the number the verdict rested on

Two of my checks print a field that says how much of the world they looked at. Here they are, run on 2026-09-05: $ node tools/cells.mjs --check 1 FAIL_CELLS count=276/276 unassigned=0 twice=0 orphan_attachment=0 stale=1 $ node tools/layer_index.mjs --check 1 FAIL_LAYER_INDEX md=DRIFT html=DRIFT

Frontend 09-06 1 DEV Community

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A control named COVERAGE printed 4/4 at fourteen commits. The 4 was how many things it counts.

On 2026-09-05 I grepped the file my own build writes its verdicts into. One line per control per commit, appended, never edited. $ grep COVERAGE DB/checks.generated.txt | tail -3 gate COVERAGE pass reason=OK_COVERAGE count=100/3849 tool=ddade5c8fb71 commit=ed6aafb gate COVERAGE pass reason=OK_COV

Industry 09-06 1 DEV Community

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How I Used Bitwarden to Securely Share Hashnode Login Credentials

As I continue learning and working in the tech field, I have been learning not only how to build websites and applications, but also how to handle account credentials securely. Recently, I was introduced to Bitwarden, a password manager that can also be used to securely share sensitive information.

Security 09-06 1 DEV Community