DEV Community • 2026-08-20 12:43

Pi4J LED Playground: A Community Resource for Learning Hardware Programming with Java

One of the best moments when learning electronics is seeing your first LED blink. It's a simple experiment, but it represents the bridge between software and the physical world. With Java and Pi4J, that first step is already well documented. But what happens after the first LED? How do you experiment with different animations, colours, brightness levels, or GPIO configurations without repeatedly ...

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DEV Community • 2026-08-20 12:38

Academic social network developed to connect students through knowledge exchange.

SkillShare is an academic social network developed to connect students through knowledge exchange, informal tutoring, and collaboration among users with different skills. The project aims to facilitate collective learning through a modern, dynamic, and responsive web platform. The project was developed as a Course Completion Project (TCC) for the Technical Course in Information Technology at the E...

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Lobsters • 2026-08-20 12:32

Why compiling Rust to WebAssembly is slow

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DEV Community • 2026-08-20 12:31

Chapter 2 (Part 2) Knowledge Retrieval Engine

2.6 Why Retrieval Is Necessary A Large Language Model only knows what was available during its training. If the user asks about something that changed after the model was trained, the model may not know the latest information. Instead of forcing the language model to guess, ACAI first determines whether external information is required. User Prompt │ ▼ Need External Knowledge? ...

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DEV Community • 2026-08-20 12:25

A benchmark is only as good as the model you use to grade it

I built a pytest harness that runs the same set of questions through five language models at once - a free local Llama, plus GPT, DeepSeek, and two Claude models - and compares them on the three things a team pays for: cost per query, speed, and answer quality. The plan was simple. Run the grid, read the scoreboard, say which model to use. The scoreboard came back clean and easy to read. This is ...

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Hacker News • 2026-08-20 12:23

Show HN: Simple Screenshot Copy – screenshots straight to the clipboard

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Hacker News: Front Page • 2026-08-20 12:19

Browser De-Slop

Article URL: https://www.sacredheartsc.com/blog/browser-de-slop/ Comments URL: https://news.ycombinator.com/item?id=49373616 Points: 5 # Comments: 1

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DEV Community • 2026-08-20 12:18

WebMCP Agentic Web: Debugging 2‑Second Latency Spikes

webmcp agentic web: Why Backend Engineers Must Rethink Their Architecture Quick Answer webmcp agentic web: Agentic web workloads over MCP require stateless gateways, distributed context stores, prompt caching, and fine‑grained telemetry to keep latency below 350 ms and cost under control. Latency and State in Multi‑Agent LLMs When a Multi‑Agent System talks to an ...

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DEV Community • 2026-08-20 12:15

How to Convert PDF to Word in the Browser with Vue 3 and pdf-lib

Converting PDF to Word seems straightforward, but the reality is more complex. PDF stores text as character coordinates, while Word uses structured paragraphs. Bridging this gap requires careful text extraction and order reconstruction. Here's how to build a browser-based PDF to Word converter with Vue 3 and pdf-lib. The challenge: PDF vs Word PDF is a presentation format — text is po...

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Real Python • 2026-08-20 12:10

Quiz: Your Guide to the CPython Source Code

Test your grasp of the CPython source code, from bytecode and memory management to frames and generators. Based on the CPython 3.8 walkthrough.

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Product Hunt — The best new products, every day • 2026-08-20 12:06

Dockhand

Docker management for everyone Discussion | Link

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DEV Community • 2026-08-20 12:06

Trust Scores for Agents: How a Trust Rating Actually Gets Computed

Trust Scores for Agents: How a Trust Rating Actually Gets Computed When a human applies for a mortgage, their credit score is a summary of their financial past — how reliably they paid debts, how much they owe, how long they've been borrowing. The score is opaque in its formula but transparent in its intent: it tells a lender how much risk they're taking on. Agent reputation systems fac...

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DEV Community • 2026-08-20 12:06

Conectando Strava ao Claude através de MCP

Como conectar o Claude ao Strava (passo a passo para iniciantes) O Strava lançou um conector oficial baseado em MCP (Model Context Protocol), que permite ao Claude ler os dados da sua conta Strava — atividades, distâncias, ritmo, elevação e tendências de treino — e responder perguntas sobre isso em linguagem natural, direto na conversa. Este guia mostra como ativar essa conexão, mesmo ...

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Hacker News • 2026-08-20 12:04

Show HN: I trained a 125M model to autocomplete piano on-device

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DEV Community • 2026-08-20 12:03

I got tired of writing boilerplate imports, so I built Block: Run Python, JS, and Lua in a single file

💡 The Problem: The Import / Glue Code Headache A while ago, I was practicing importing modules across different projects. I wanted to use Python for its rich data science libraries and Node.js for its async web performance. Normally, if you want Python to pass a simple calculated array or dictionary to JavaScript, you have to: Spin up a local FastAPI / Flask server or write to a temp...

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DEV Community • 2026-08-20 12:03

I sorted music for a living. Sometimes ten seconds was enough

Then I'd sit down to my own work and lose fifteen minutes choosing a track. For about three years I worked for a stock music library, and most of the job wasn't what people assume. I found the artists myself, solo performers and small bands, then explained how the library and licensing worked. The ones who said yes sent me their catalogues. I uploaded the files and started listening. That's whe...

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DEV Community • 2026-08-20 12:03

Before You Add Kafka, Redis, and Elasticsearch: Try One Postgres First

Last month I was building out my own AI agent infrastructure, the side project where I run a few agents that research, draft, and publish content. The agents needed three things beyond the main database: a job queue, a cache for repeated lookups, and search over article text. My instinct, six years of Spring Boot muscle memory, was to reach for the usual stack. RabbitMQ or Redis Streams for the qu...

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DEV Community • 2026-08-20 12:02

Addressing the CSA Top Threats to Cloud Computing 2026

✓ Human-authored analysis; AI used for formatting and proofreading. CSA's Top Threats to Cloud Computing 2026 published in August 2026. 507 experts. 11 issues. The scores range from 7.45 to 7.95. A spread of half a point, meaning the industry considers all eleven roughly equally severe. Identity holds the top spot. Two AI-specific threats enter for the first time: AI-Enhanced Attacks at rank...

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DEV Community • 2026-08-20 12:01

The silent bug that taught us to never trust an API success response

Three weeks after launching Nventory we had a silent bug. Inventory was updating correctly everywhere. Except one seller's WooCommerce store. Every sync completed successfully. Every log showed green. Every API call returned 200. The seller's stock was quietly wrong for eleven days before anyone noticed. The bug wasn't in the sync layer. It was in the verification step we hadn't built yet. ja...

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Zombie Card Attack Can Revive Expired Visa Cards for Contactless Payments
The Hacker News • 2026-08-20 12:01

Zombie Card Attack Can Revive Expired Visa Cards for Contactless Payments

Researchers at the University of Massachusetts Amherst have demonstrated an attack that revives expired Visa contactless credit cards for real in-store purchases by rewriting the expiration date a point-of-sale (POS) terminal reads over near-field communication (NFC), without breaking any of the card's cryptography. The attack, which the researchers named "Zombie Card," requires physical

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