DEV Community • 2026-04-20 06:01

How to Write Production System Prompts: A Complete Framework

<p>Most system prompts in production today are a single paragraph stuffed into a <code>system</code> role message and never touched again. They work — until they don't. A user finds an edge case, the model hallucinates a response outside your domain, or a new model version subtly changes behaviour. This guide provides a complete, battle-tested framework for writing syste...

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DEV Community • 2026-04-20 05:59

The Ultimate Next.js & React Master Prompt for AI Coding Assistants (Cursor, Claude, Devin)

<p>A <strong>Next.js Master Prompt</strong> is a strict, structured set of instructions that locks an AI coding assistant into Next.js 14+ App Router conventions, TypeScript strict mode, and Tailwind CSS best practices — preventing the hallucinations and context collapse that plague most AI-assisted development sessions.</p> <p>Below, we provide a fr...

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DEV Community • 2026-04-20 05:59

Why Your AI Developer Keeps Losing Track (And How a Master Prompt Fixes It)

<p>Whether you are using <strong>Claude 3.5 Sonnet</strong>, <strong>Cursor</strong>, <strong>Devin</strong>, or a custom Development AI, you have likely experienced the <em>"context collapse."</em></p> <p>It starts off great. You ask the AI to build a React login page, and it writes flawless code. Then, you ask it...

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DEV Community • 2026-04-20 05:55

CarbonTrace

This is a submission for Weekend Challenge: Earth Day Edition "my inbox already knows everything I do, so I built an agent to read it" Project Overview CarbonTrace is an AI-powered web application that automatically tracks a user's personal carbon footprint by scanning their Gmail inbox. Instead of asking users to manually log activities, the app connects to Gmail via OAuth, reads rec...

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DEV Community • 2026-04-20 05:54

Understanding Access Management

Why Many Companies Have Permission Issues In many growing companies, cloud permissions often become messy and hard to manage. This is not because teams do not care about security, but because they focus more on speed in the early stage. As the team grows, more people and systems need access. Without a clear structure, permissions quickly become unorganized. At the center of this topic is Identit...

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LoongSuite Python Agent Launches: Observability Into Every AI Agent Action, Zero-code Integration
DEV Community • 2026-04-20 05:54

LoongSuite Python Agent Launches: Observability Into Every AI Agent Action, Zero-code Integration

This article introduces the LoongSuite Python Agent, Alibaba Cloud's OpenTelemetry distribution for zero-code AI application observability. As AI applications grow in complexity, they often hit an inflection point where the features work — but making changes feels increasingly risky. With multi-agent pipelines, tool calling, retrieval-augmented generation (RAG), and memory all in play, the hard q...

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DEV Community • 2026-04-20 05:51

Securing Kubernetes with Wireguard & others

As the cluster grew, I needed secure access to internal services — PostgreSQL, NATS, Redis, ScyllaDB — without exposing them to the public internet. I went through three solutions: WireGuard, Tailscale, and eventually Netbird. Each one taught me something. The Problem Early on I was forwarding TCP ports directly through the ingress controller: tcp: "4222": nats/nats-cluster:4222 ...

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DEV Community • 2026-04-20 05:47

When Logout is not enough: Defending against Token Theft with Big Tech-grade Rotation.

Hi, I’m Pau Dang. Imagine a silent intruder. They steal a single Refresh Token and maintain persistence in your system for months. Your user changes their password, logs out, and feels safe—but the intruder remains. This is the reality of systems that lack Stateless Invalidation. I’m tired of boilerplates that ignore this Attack Vector. In this post, I want to discuss the architectural blueprint...

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DEV Community • 2026-04-20 05:47

How I Built a Community Wiki for a Roblox Game (Bridger Western)

What is Bridger Western? Bridger Western is a Roblox survival game set in the American frontier, blending western gameplay with JoJo's Bizarre Adventure Stands and Jujutsu Kaisen mechanics. It has a dedicated player base but limited official documentation — the official Trello only covers the basics. That gap is exactly why I built Bridger Western Wiki. The Stack Stati...

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DEV Community • 2026-04-20 05:45

"How I Control Codex and Claude Code From Telegram — a 5-Minute Setup"

I was at dinner when a colleague pinged me: "the staging deploy is failing, can you check the test suite?" I didn't have my laptop. I had my phone and a Telegram bot connected to my dev machine. I typed: /cx fix the failing test in tests/auth.test.js Codex started running on my desktop. Two minutes later, my phone buzzed: "Task completed. Fixed assertion in auth.test.js line 42 — expected token...

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DEV Community • 2026-04-20 05:43

Persistent Storage in Kubernetes: From Longhorn to OpenEBS

Stateful workloads need storage that outlives pods. In Kubernetes, that means Persistent Volumes (PV) and Persistent Volume Claims (PVC) — a PV is the actual storage, a PVC is a pod's request for it. Kubernetes matches them and handles the binding. The interesting question is what backs those PVs. I started with Longhorn, realized it was too heavy for my cluster, benchmarked alternatives, and swi...

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DEV Community • 2026-04-20 05:38

Monitoring & Observability

Metrics tell us something is wrong. Logs tell us why. We need both. This post covers how I set up the full observability stack for ASTRING — Prometheus and Grafana for metrics, Fluent Bit and Loki for logs, and Alertmanager. Metrics: Prometheus and Grafana Why Prometheus Prometheus is the standard for Kubernetes monitoring. It scrapes /metrics endpoints from our services and...

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How I Built An Automatic Railway Gate Control System Using An Arduino Uno
DEV Community • 2026-04-20 05:37

How I Built An Automatic Railway Gate Control System Using An Arduino Uno

Kiswin / Automatic-Railway-Gate-Control-System Automatic railway gate system using Arduino Uno. An IR sensor detects the train, a servo motor lowers/raises the gate, and a buzzer with LED gives warnings. A simple prototype showing how real railway crossings automate safety and reduce human error. Automatic-Rail...

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Energy Leak Scout: Find the Waste. Cut the Bill.
DEV Community • 2026-04-20 05:30

Energy Leak Scout: Find the Waste. Cut the Bill.

This is a submission for Weekend Challenge: Earth Day Edition What I Built Energy Leak Scout: Track Every Watt, Save Every Month. Energy Leak Scout is a Flutter + Node.js app that helps users understand daily home energy usage and reduce waste. Users enter appliance runtime (hours/day), view estimated electricity usage and trends, and get AI-generated explanations for high consumption ...

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Product Hunt — The best new products, every day • 2026-04-20 05:27

Cosmic Agent Marketplace

AI agents for your team, built into your CMS Discussion | Link

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DEV Community • 2026-04-20 05:20

Why Do I Keep Killing My Side Projects?

I recently shut down Bloudme. It was my second personal project, which started as an RSS reader and quietly died. Before that, there was Podiscover — a social media platform for podcasts. Two projects, two deaths. At some point, you need to stop blaming circumstances and start asking harder questions. This isn't a piece that starts with "what I learned from failure" and ends optimistically. This ...

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DEV Community • 2026-04-20 05:18

Full-Proof: Distillery 0.4.0 and the Agent Memory Problem

Full-Proof: Distillery 0.4.0 and the Agent Memory Problem !!! note "Release summary" Distillery 0.4.0 shipped April 19, 2026. It's the release where the MCP tool surface becomes a public contract: stable tool names, consistent error codes, predictable response shapes. The release body lives on the GitHub release page. A few weeks ago I wrote the first post in this serie...

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DEV Community • 2026-04-20 05:18

I built a Chrome extension that turns any competitor's website into a UX intelligence report

The problem I kept running into Every time I needed to do competitive research, the workflow was the same painful loop. Open 10 tabs, take notes in a doc, screenshot things, try to remember what you saw on that one checkout flow two sites ago. Then spend an hour reformatting everything into something you could actually show someone. The insights were always there. The process was the problem. Wh...

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Building a cinematic Sci-Fi Dashboard using 100% Vanilla JS & CSS (No React/Tailwind)
DEV Community • 2026-04-20 05:17

Building a cinematic Sci-Fi Dashboard using 100% Vanilla JS & CSS (No React/Tailwind)

Hey DEV community! 👋 As a UI/UX Architect, I’ve noticed a frustrating trend in the B2B SaaS space, particularly in cybersecurity (SIEM, SOC, UEBA tools): the backends are incredibly powerful, but the frontends often look like boring, overly complex Excel spreadsheets. I wanted to bridge the gap between Hollywood-style cinematic interfaces and actual, high-density functional layouts. So, I buil...

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Newest questions tagged javascript - Stack Overflow • 2026-04-20 05:17

How to redirect user to home if they're already logged in and is trying to access the login page?

I have a component that redirects the user to whatever protected route they were trying to access after they log in via: export const ProtectedRoute = () => { const { token } = useAuth() const location = useLocation() if (!token) { return <Navigate to="/login" replace state={{ from: location }} /> } return <Outlet /> } and setToken(token) const origin = loca...

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