DEV Community • 2026-04-24 14:00

Reading PostgreSQL EXPLAIN and EXPLAIN ANALYZE Output

Every PostgreSQL performance conversation eventually lands on a question that sounds trivial: what does this EXPLAIN mean? The output is almost readable. There are node names in English, numbers that look familiar, and enough structure that you can guess at the intent. But if you're guessing, you're going to miss the signal that actually matters — and the difference between a plan that returns in ...

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17m read
DEV Community • 2026-04-24 14:00

Claude Code caching is eating your budget. Here's what's happening.

Claude Code caching is eating your budget. Here's what's happening. Claude Code's prompt caching has two TTLs (5 minutes and 1 hour), two price tiers (25% and 100% premium on cache writes), and most people have no idea which one they're paying for. The Register reported this week that users are hitting unexpected bills and rate limits. If you run Claude Code in production, you need to r...

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4m read
DEV Community • 2026-04-24 14:00

Our Biggest Enterprise Deal Almost Died Because We Didn

We were 8 weeks into a sales cycle with a Fortune 500 company. $240K ACV deal. Our biggest ever. The champion loved our product. The technical evaluation went great. The pilot was successful. Then it hit the security review. Their CISO's team sent us a security questionnaire. 187 questions. And question 43 asked: "Describe your audit logging capabilities including what events are logged, retenti...

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5m read
DEV Community • 2026-04-24 14:00

The Complete Guide to Public Status Pages for Your Business in 2026

When your product breaks, your customers are already refreshing. They are checking Twitter, pinging your support inbox, and wondering whether the problem is on their end or yours. The single cheapest thing you can do to hold onto their trust in that moment is to publish a public status page. A good one turns a stressful silence into a calm signal. A bad one, or no one at all, turns a 15-minute out...

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15m read
Mark's Dev Blog • 2026-04-24 14:00

Presentations: A Guide to React Compiler Rendering

I've spent years explaining the basics and nuances of React's rendering behavior. That post is by far the most widely read resource I've ever published, and it's helped thousands of React devs actually understand how React rendering actually works. Now, we have the React Compiler, which promises to "automatically optimize your React apps". But how does it work? What is it doing to you...

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1m read
DEV Community • 2026-04-24 14:00

pyproject.toml: Modern Python Dependency Management

pyproject.toml is the contract behind modern Python dependency management. Without it, installers have to execute setup.py or guess build requirements, which leads to fragile builds and non-reproducible environments. This article breaks down the key PEPs (518/517/621) and how pyproject.toml connects to python -m venv + python -m pip for predictable installs. The old problem: executable s...

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3m read
Agent Harnessing: The Non-Model Infrastructure That Makes AI Agents Actually Work
HackerNoon • 2026-04-24 13:56

Agent Harnessing: The Non-Model Infrastructure That Makes AI Agents Actually Work

Everyone building AI agents has access to the same frontier models through the same APIs. What separates production-grade agents from ones that fail silently is the non-model infrastructure surrounding them — the harness. That means a layered memory system that persists state across sessions, a context layer that selects and compresses the right information before it ever reaches the model, contro...

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1m read
Hacker News: Front Page • 2026-04-24 13:54

Linux 7.1 Removes Drivers for Bus Mouse Support

Article URL: https://www.phoronix.com/news/Linux-7.1-Input Comments URL: https://news.ycombinator.com/item?id=47890365 Points: 5 # Comments: 0

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1m read
Hacker News: Front Page • 2026-04-24 13:50

Affirm Retooled for Agentic Software Development in One Week

Article URL: https://medium.com/@affirmtechnology/how-affirm-retooled-its-engineering-organization-for-agentic-software-development-in-one-week-1fd35268fde6 Comments URL: https://news.ycombinator.com/item?id=47890302 Points: 7 # Comments: 0

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1m read
DEV Community • 2026-04-24 13:49

What happens when your company inbox gets an AI operator?

Every company has an inbox that quietly runs the business. Customers ask for help there. Partners reach out there. Reporters ask questions there. Security reports arrive there. Candidates apply there. Random but important opportunities show up there before they show up anywhere else. For a small team, the inbox is not just a message feed. It is a business surface. And that creates an interesti...

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8m read
Real Benchmark: 5 Chunking Strategies in Amazon Bedrock Knowledge Bases
DEV Community • 2026-04-24 13:48

Real Benchmark: 5 Chunking Strategies in Amazon Bedrock Knowledge Bases

A few weeks ago I ran into a question I've been hearing more and more in conversations with architects and dev teams: "I'm going to implement a RAG with Bedrock Knowledge Bases. Which chunking strategy should I use? I see there are five and they all sound reasonable." It's a fair question, and honestly I didn't have an answer that left me satisfied. The AWS docs describe each strategy clearl...

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24m read
Foundation Blueprints: 5 Production-Ready Patterns for Backend Systems
HackerNoon • 2026-04-24 13:46

Foundation Blueprints: 5 Production-Ready Patterns for Backend Systems

Every production system maps to one of five architectural shapes. Pick your blueprint, get hardened cross-cutting concerns for reliability, security, and observability free with it, and stop re-litigating infrastructure decisions on every new project.

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1m read
DEV Community • 2026-04-24 13:44

I Built My Backend on SQLite. Then I Deleted It.

In Part 7, I taught my server how to die gracefully. It felt production-ready. Auth, rate limiting, caching, clean shutdown — the API was doing real work. I said Part 8 would be "Docker + Postgres." I was wrong. Postgres alone deserved its own post, because swapping the database under a running backend taught me more in a weekend than the three weeks before it. Then I tried to run my tests in ...

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5m read
DEV Community • 2026-04-24 13:40

Don't Build Your MCP Server as an API Wrapper

The Model Context Protocol (MCP) is gaining traction as the standard way to connect language models to external systems. And the first instinct of most engineers who already have a REST API is entirely predictable: wrap it. One tool per endpoint, one parameter per query string, done in an afternoon. It compiles, it runs, the model can technically call it — and it will perform badly in production. ...

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4m read
Hacker News: Front Page • 2026-04-24 13:36

The pope moves to police AI

Article URL: https://www.axios.com/2026/04/24/catholics-pope-vatican-artificial-intelligence Comments URL: https://news.ycombinator.com/item?id=47890094 Points: 12 # Comments: 1

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1m read
DEV Community • 2026-04-24 13:36

Por Que Desenvolvedores Com Conhecimento Técnico Não Conseguem Vagas?

O Post Que Você Já Viu Mil Vezes Abre o LinkedIn em qualquer dia da semana e você vai encontrar algo assim: "Me chamo João, tenho 3 anos de experiência com React, Node.js, TypeScript, MongoDB, PostgreSQL, Docker, Git, AWS. Estou em busca de novas oportunidades. Quem puder ajudar, compartilha!" Esse post é publicado dezenas de vezes por dia. Muda o nome, muda a stack, mas a estrutura é sempre a mes...

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10m read
DEV Community • 2026-04-24 13:34

Tecnologia não é custo. É decisão.

Ao longo da minha experiência construindo sistemas e acompanhando operações de perto, percebi um padrão que se repete em muitas empresas: tecnologia ainda é tratada como custo. Algo que entra na planilha como despesa, que precisa ser reduzido quando o orçamento aperta e que só ganha prioridade quando o problema já apareceu. A decisão costuma ser reativa, tomada sob pressão, quando o sistema já não...

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2m read
DEV Community • 2026-04-24 13:31

One-Person AI Companies Are the New Arbitrage

The Infrastructure Shift That Changes Everything Two years ago, building a production AI system required venture capital. You needed GPUs, orchestration layers, DevOps expertise, and teams of ML engineers just to ship something that competed with incumbents. That arbitrage is dead. Today's AI infrastructure commoditization—API-accessible models, serverless inference, multi-modal founda...

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3m read
A beginner’s guide to Instructor: Get Structured Outputs from LLMs
DEV Community • 2026-04-24 13:31

A beginner’s guide to Instructor: Get Structured Outputs from LLMs

LLMs generate text by predicting the next best token. Pass the same prompt twice and you might get two different outputs. Sometimes it's a clean JSON object. Sometimes it's the same data wrapped in markdown fences and a paragraph of explanation you didn't ask for. Often, you don't need the full response. You just need specific parts of it to feed into an API, store in a database, or pass to the n...

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5m read
DEV Community • 2026-04-24 13:30

Help me with DSA... PLEASE

I know this sounds stupid but... HELP ME WITH DSA I am a student of computer engineering and starting to learn DSA. I am more into project stuffs. I like and do web dev projects. I know Javascript (obviously from web dev), Python (come on who does not know this lang) , and C as my college is of stone age. The problem is DSA is vast and i do not know where to start at all. I know time complexity a...

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1m read
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