DEV Community • 2026-04-25 18:58

Why LLM Agents Fail: Four Mechanisms of Cognitive Decay and the Reasoning Harness Layer

LLM agents fail in four predictable, mechanism-level ways. Attention decay, reasoning decay, sycophantic collapse, hallucination drift. The current stack (prompting, fine-tuning, RAG, agent loops) cannot close them because each layer operates inside the same decaying chain. The fix is an external layer we call a reasoning harness. If you have built an agent that runs more than ten steps, you have...

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DEV Community • 2026-04-25 18:56

Stop Building One Giant Prompt: A Better Way to Design LLM Systems

Most early LLM apps start the same way: “Let’s just put everything into one prompt and let the model handle it.” So we write a prompt that tries to: validate input transform data generate output summarize add reasoning handle edge cases …and somehow do it all in one call. It works—until it doesn’t. The Problem with “God Prompts” As the prompt grows: Instructions start...

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DEV Community • 2026-04-25 18:54

Bayes' theorem in machine learning

Bayes' Theorem describes how to update the probability of a hypothesis when new data is obtained. It reverses conditional probability: instead of asking “what is the probability of the data given the hypothesis?”, we ask “what is the probability of the hypothesis given the observed data?” P(A∣B) = P(B∣A)*P(A) / P(B) P(A∣B) = Likelihood × Prior / Marginal likelihood P(A∣B) — posterior ...

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DEV Community • 2026-04-25 18:52

I Built an AI That Makes Real Phone Calls — Here's the Architecture

A few weeks ago, I asked my AI agent to call a local Indian restaurant and order chicken biryani for pickup. I gave it my name, my pickup time preference, and one rule: don't make anything up. It dialed the number. It introduced itself as my assistant. It asked for one chicken biryani to-go, confirmed the $15 price, accepted a 20-minute pickup window, said thank you, and hung up. I drove over and...

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DEV Community • 2026-04-25 18:51

Karpenter Redefinindo o Autoscaling de Clusters Kubernetes com Provisionamento Just-in-Time

A escalabilidade de clusters Kubernetes evoluiu de modelos baseados em grupos estáticos para arquiteturas dinâmicas e orientadas a eventos. O Karpenter, um orquestrador de infraestrutura de código aberto desenvolvido pela AWS, lidera essa transformação ao eliminar a necessidade de gerenciar grupos de auto-escalonamento (ASGs) e focar diretamente nos requisitos de recursos de cada Pod pendente. Est...

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Hacker News • 2026-04-25 18:47

Show HN: I benchmarked how good LLMs are at proofreading English

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DEV Community • 2026-04-25 18:45

LLM Planning, AI Arguments, and Building Persistent Worlds

LLM Planning, AI Arguments, and Building Persistent Worlds LLM planning is gaining focus, while new tools are emerging to address agent identity and trust. The conversation around AI capabilities is shifting towards more practical, modular approaches, and the potential for AI to be integrated deeply into our digital lives is becoming clearer. LLM "Both Bad" Rates Decline, But ...

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DEV Community • 2026-04-25 18:42

Software Is Dissolving Into the Model

Two repositories caught my eye this month. The first is google/agents-cli, Google's official tooling for building agents on Google Cloud — a CLI plus a bundle of markdown "skills" that any coding assistant (Claude Code, Codex, Gemini CLI, Cursor) can pick up. The second is Flipbook, an experimental "browser" launched by ex-OpenAI researchers two days ago. Flipbook has no HTML, no DOM, no rendered ...

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DEV Community • 2026-04-25 18:41

Deep Dive: The Cognitive Science Behind the ACLAS Neuro-Edu SDK 🏛️🧠

Deep Dive: The Cognitive Science Behind the ACLAS Neuro-Edu SDK 🏛️🧠 At the Atlanta College of Liberal Arts and Sciences (ACLAS), we aren't just building "another AI tutor." We are engineering a fundamental reconceptualization of how Large Language Models (LLMs) align with the human mind. Today, we’re peeling back the curtain on the Neuro-Edu Technical Whitepaper. If you’ve ever wondere...

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DEV Community • 2026-04-25 18:38

When 'getting faster' isn't the same as 'getting better'

Anthropics February 2026 study classified 11 observable collaboration behaviors across 9,830 Claude conversations. Things like how often you delegate multi-step reasoning, how much you describe context versus just issue commands, whether you push back on outputs or accept the first result. They called it the AI Fluency Index. I'd been using Claude Code daily for months. When I read the study I re...

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DEV Community • 2026-04-25 18:37

I built a PostgreSQL learning platform with labs & quizzes — would love feedback

Hey everyone, I built postgresqlacademy.com, a platform focused on helping beginners learn PostgreSQL step by step. It includes structured lessons, quizzes, hands-on lab exercises, and a 1-on-1 chat feature for getting help when you’re stuck. I’m trying to focus more on practical learning, so most lessons include real queries and scenarios instead of just theory. There’s a free tier available, ...

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Can your code survive 1.5 Billion rounds of digital betrayal? Submit your strategy!
DEV Community • 2026-04-25 18:31

Can your code survive 1.5 Billion rounds of digital betrayal? Submit your strategy!

Crazy Start I built N-Prisoner's Dilemma game engine in C++ and run a tournament to find out what strategy is the best? Write your strategy and fight with other players in this game theory battle. When I decided to make this game I couldn't even imagine that my ThinkPad would be the place of the Ten minute war. 25 strategies fought in more than 0.5 Million of battles each has approxim...

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DEV Community • 2026-04-25 18:31

Is a Data Science Bootcamp Worth It in 2026?

If you’re asking data science bootcamp worth it, you’re really asking a sharper question: will a bootcamp compress enough learning and portfolio output to justify the time, money, and opportunity cost versus self-study? In online education, the honest answer is: sometimes—but only when the program matches your background, schedule, and target role. What you actually buy with a bootcamp ...

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Hacker News: Front Page • 2026-04-25 18:30

AI agents that argue with each other to improve decisions

Article URL: https://github.com/rockcat/HATS Comments URL: https://news.ycombinator.com/item?id=47903471 Points: 10 # Comments: 1

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How Website Technology Detection Actually Works
DEV Community • 2026-04-25 18:27

How Website Technology Detection Actually Works

Every developer has wondered at some point: what is this site built with? Maybe you’re doing competitive research, reverse-engineering a stack decision, or just curious how a particularly fast site achieves its performance. Tools like Wappalyzer answer this question instantly. But how do they actually know? The answer is more interesting than you’d expect and involves four distinct layers of anal...

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What is jQuery Really? A Look Under the Hood
DEV Community • 2026-04-25 18:25

What is jQuery Really? A Look Under the Hood

What is jQuery Really? jQuery can drastically simplify and alleviate many headaches when working with HTML, CSS, and JavaScript. Taking a little time to understand how a tool works — the mechanism that drives it — is often the difference between having access to a tool and having command over it. To better understand what jQuery is doing under the hood, it is helpful to understand a little bit a...

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DEV Community • 2026-04-25 18:24

Building the First Anti-Fragile University: Introducing ACLAS Neuro-Edu SDK v3.0 🚀

Building the First Anti-Fragile University: Introducing ACLAS Neuro-Edu SDK v3.0 🚀 At the Atlanta College of Liberal Arts and Sciences (ACLAS), we believe that elite education should be a universal human right, not a privilege gated by geography or economic status. Today, we are thrilled to announce the official release of the ACLAS Neuro-Edu SDK v3.0 — our industrial-grade, open-sour...

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DEV Community • 2026-04-25 18:24

Those Green Squares! (Github Edition | Part 1)

Check out my GitHub Profile ! [https://github.com/thebartakke-anup] The Addiction of the Green Square... You create a repository, you push a few lines of code, and suddenly, you see it: that first bright green square on your GitHub profile. At first, it’s just a tracker, but soon, it becomes a high score or a streak. You find yourself wanting to "commit just one more thing" before bed. You start...

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Lobsters • 2026-04-25 18:24

Linux May Drop Old Network Drivers Now That AI-Driven Bug Reports Are Causing A Burden

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Hacker News • 2026-04-25 18:23

Show HN: Quay – Menu-bar Git sync

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