Morning.dev

DEV Community • 2026-04-21 15:19

contentful-managementでエントリーの一覧取得と新規作成をasyncでやってみる

Using async with contentful-management to List and Create Entries I recently experimented with the JavaScript SDK for contentful-management and wanted to jot down my findings before I forget. Preparation Create a Contentful account and space. This article helped me understand the process clearly. Install the necessary packages for your Node.js project: npm install dotenv...

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2m read

DEV Community • 2026-04-21 15:18

BotConduct Training Center: free adversarial evaluation for your AI agent

We just launched the free tier of BotConduct Training Center — an adversarial evaluation platform for AI agents. The problem You built an AI agent. It works great in testing. But what happens when: A user tries to extract its system prompt? A caller impersonates authority to bypass restrictions? Contradictory information gets planted across a conversation? Adversarial patterns emerge...

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1m read

DEV Community • 2026-04-21 15:18

3 Things React Compiler Won't Auto-Memo: From 512ms Down to 6ms

Originally published at recca0120.github.io "React Compiler auto-memos everything — I don't need manual optimization, right?" That was me six months ago. Then a user reported tab switching was laggy. I opened React DevTools Profiler and recorded a single commit at 512ms. Cold sweat. The project runs React 19 + React Compiler 1.0. In theory, useMemo, useCallback, and React.memo are all automatic....

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6m read

Beyond English: Translating Manhua into 20+ Languages with AI-Powered Auto-Typesetting

DEV Community • 2026-04-21 15:16

Beyond English: Translating Manhua into 20+ Languages with AI-Powered Auto-Typesetting

Translating a visual medium like Manhua is about fitting those strings into pre-defined artistic spaces. While English is the primary target, building AI Manga Translator to support 20+ languages—from German to Vietnamese—presented unique engineering challenges. 1. The Text Expansion Problem Different languages have vastly different word lengths. The Challenge: A concise Chinese phrase might bec...

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1m read

Practical Guide: Building a Cell-Based Architecture on Azure with Terraform and Python

DEV Community • 2026-04-21 15:15

Practical Guide: Building a Cell-Based Architecture on Azure with Terraform and Python

1. Introduction As cloud applications scale to serve global audiences, relying on a single centralized infrastructure stack introduces critical vulnerabilities. A localized failure or a noisy neighbor can trigger a systemic outage. Cell-Based Architecture mitigates this by partitioning the system into isolated, identical, and self-contained units called "cells." By routing specific tena...

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7m read

HackerNoon • 2026-04-21 15:14

Stateless AI Agents Are the Real Problem

AI agents don’t actually learn from experience, they reset after every run. Chat history is not real memory and doesn’t scale well. Without memory, agents keep repeating the same mistakes and rediscovering solutions. A simple memory layer can store facts, past events, and learned steps. Even basic memory makes agents more consistent and efficient over time. You don’t need complex systems, just eno...

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1m read

DEV Community • 2026-04-21 15:11

Six Principles for AI-Driven Project Accountability (With Code)

We call him Hasselbott. Here's the playbook. We built an AI accountability system for our project managers. We named it Hasselbott for two reasons: it hassles you, somewhat politely (weary of sycophantic AI), about the things you'd rather not look at. And... If you're going to nag PMs about overdue tasks, you might as well do with AI avatar of David Hasselhoff in mind. A year in, it wo...

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9m read

I cleaned up the operator view of my CSV intake console #6

DEV Community • 2026-04-21 15:10

I cleaned up the operator view of my CSV intake console #6

In the previous step, I made duplicate detection profile-specific. [Previous article: profile-specific duplicate rules] https://dev.to/fastapier/i-added-profile-specific-duplicate-rules-to-my-csv-intake-console-5j0m That improved the intake logic. But there was still a practical problem: an operator could be given the right result, and still not trust the screen. So this update was about the ...

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2m read

DEV Community • 2026-04-21 15:10

Stop Breaking Your Terminal — Meet TermiCool

Every developer has done it. You tweak your .zshrc, install a new theme, try a fancy prompt… …and suddenly your terminal is broken. We’ve all been there — broken configs, missing fonts, weird colours, or worse… a terminal that won’t even start. So I built something to fix this. 👉 Meet TermiCool — a one-click, cross-platform terminal customization tool that doesn’t break your setup. Try TermiC...

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3m read

Newest questions tagged javascript - Stack Overflow • 2026-04-21 15:04

Common scenarios for memory leaks in Vanilla JavaScript and how to properly clean up?

I want to know what specifically causes memory leaks in Vanilla JavaScript. Can you provide some examples of what code leads to a leak, and the correct way to handle or fix it to release memory?

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1m read

DEV Community • 2026-04-21 15:04

Google Sheets as a Database: SELECT * FROM 'Sheet1' LIMIT 5

Here's a thing I can do now: SELECT name, revenue FROM "Q1 2026" WHERE revenue > 10000 ORDER BY revenue DESC; That's not a Postgres query. That's a Google Spreadsheet — the same one I was editing in a browser tab five minutes ago. Same query editor as Postgres. Same result grid. INSERT, UPDATE, DELETE work too. I was staring at a spreadsheet the other week and it hit me: this is alrea...

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9m read

Hacker News: Front Page • 2026-04-21 15:04

Original GrapheneOS responses to WIRED fact checker

Article URL: https://discuss.grapheneos.org/d/34369-original-grapheneos-responses-to-wired-fact-checker Comments URL: https://news.ycombinator.com/item?id=47849854 Points: 10 # Comments: 3

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DEV Community • 2026-04-21 15:02

DoctorDocs: 200+ Free Browser-Based PDF, OCR & AI Document Tools — No Sign-Up Required

A hands-on review of DoctorDocs.in — a free, privacy-first toolkit with 200+ tools for PDF editing, OCR scanning, handwriting recognition, and AI-powered document analysis. If you've ever needed to quickly extract text from a scanned PDF, read a doctor's prescription, or edit a PDF without installing Adobe Acrobat, you've probably gone through the painful ritual of Googling "free PDF tool," l...

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5m read

DEV Community • 2026-04-21 15:02

GKE Security: Fix Secrets & Control Plane Misconfigurations

GKE Security Theater: Why Your Secrets and Control Plane Access Are Probably Misconfigured Most GKE clusters I audit have the same two problems: secrets that aren't actually secret, and control plane access policies that stopped making sense six months ago. Neither shows up as a critical finding until audit time. Both are fixable in a day — but the migration planning takes longer than t...

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5m read

DEV Community • 2026-04-21 15:01

I accidentally made the fastest event system in the world

Liquid syntax error: Variable '{{% raw %}' was not properly terminated with regexp: /\}\}/

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1m read

DEV Community • 2026-04-21 15:01

How I built an MCP server for 27 government registries in a week

I built an MCP server for 27 government registries, and the first thing I learned was that the hardest part is not the transport layer. It is all the tiny differences in company identifiers, search behavior, and what each registry actually returns on a bad query. This week I wired the server so Claude Desktop can ask one question and get back a source-linked result instead of a scraped summary. T...

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3m read

DEV Community • 2026-04-21 15:01

Next.js job board: zero-downtime schema changes

I stopped breaking my job board during migrations. I run Postgres changes as additive-only, then backfill. I version my Next.js + Supabase queries to survive both schemas. I ship a migration checklist that catches the dumb stuff. Context I’m building a job board for Psychiatric Mental Health Nurse Practitioners. It’s Next.js 14 (App Router) on Vercel. Supabase + Postgres behind it. ...

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7m read

HackerNoon • 2026-04-21 15:00

Principal Components in TypeScript (Part 2): How PCA Actually Works Under the Hood

This piece walks through PCA step by step—centering data, building covariance matrices, applying SVD, and using eigenvectors to compress and analyze data.

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1m read

DEV Community • 2026-04-21 15:00

When Your Knowledge System Knows More Than You Do: The Brutal Truths After 1,847 Hours

When Your Knowledge System Knows More Than You Do: The Brutal Truths After 1,847 Hours Hey there fellow knowledge hoarder! Let me tell you a story that might hit a little too close to home. It's about my personal knowledge management system called Papers—something I've poured 1,847 hours of my life into over the past few years. If you've ever tried to build the perfect "second brain" or...

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8m read

Why GPU Clusters Bleed Money in Kubernetes (and How to Stop It)

DEV Community • 2026-04-21 15:00

Why GPU Clusters Bleed Money in Kubernetes (and How to Stop It)

GPU workloads amplify every Kubernetes resource management mistake. Learn why GPU clusters waste massive amounts of money, how scheduling and allocation really work, and what production-grade strategies reduce idle GPU time in AI/ML platforms. Before We Talk About GPUs, Let’s Be Honest About What We’ve Been Doing. In the last three parts of this multi-part series, we’ve been building toward a si...

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7m read