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DEV Community • 2026-07-29 13:40

Anthropic Says Claude Mythos Preview Found Cryptography Implementation Weaknesses

Anthropic says its Claude Mythos Preview model has identified and, in testing, demonstrated exploits for vulnerabilities in widely used cryptographic software implementations. The findings include weaknesses in libraries implementing TLS, AES-GCM and SSH, where implementation oversights could potentially enable certificate forgery or the decryption of communications. The work is a significant firs...

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DEV Community • 2026-07-29 13:39

Se eu pudesse recomeçar em TI, evitaria estes erros.

Prólogo No início da faculdade, séculos atrás (papo de 2021, foi quando entrei na he4rt developers inclusive) estava extremamente ansiosa e com isso cometi MUITOS ERROS, me levou ao bornout ficando SEM ESTUDAR por meses, até hoje vejo as pessoas cometendo a mesma coisa que eu no passado e isso atrasa MUITO os estudos! Como sempre meus artigos são super rápidos de ler, espero que gostem!...

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DEV Community • 2026-07-29 13:35

How to check if an IP is blacklisted (DNSBL), from raw DNS to one curl

Your emails start bouncing, or a website suddenly challenges every request from your server. Very often the reason is boring: your IP landed on a DNSBL and you did not know. A DNSBL (DNS-based blackhole list) is a reputation database you query over plain DNS. Mail servers do this on every incoming connection. Spamhaus, SpamCop, Barracuda and a dozen others each run their own list, their own crite...

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DEV Community • 2026-07-29 13:33

Building Form-Associated Custom Elements with ElementInternals

Web components have been able to fully participate in native HTML forms since 2023 — submit their value with FormData, trigger :invalid, reset alongside the <form>, the works. The API that makes it possible, ElementInternals, is now supported in Chromium, Firefox, and Safari 16+. The catch: nobody tells you it's about 40 lines of repetitive plumbing per component. This post walks through wh...

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DEV Community • 2026-07-29 13:33

7 REST API Best Practices Every Backend Developer Should Follow

7 REST API Best Practices Every Backend Developer Should Follow Designing a REST API isn't just about making endpoints work—it's about creating an interface that's intuitive, reliable, secure, and easy for other developers to integrate with. Whether you're building a personal project or a production-grade application, following REST API best practices can save countless hours of debugg...

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HackerNoon • 2026-07-29 13:29

CISO Whisperer Launches Its Black Hat USA 2026 Watch List: 12 Companies Across Three Tiers

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DEV Community • 2026-07-29 13:26

LioranDB V2 Pre-Alpha Benchmark Summary

Over the past few weeks I've been benchmarking LioranDB V2, a document database engine written completely from scratch in Rust. Instead of publishing screenshots or selected numbers, I've decided to publish the raw benchmark logs so anyone can inspect the results themselves. This is Pre-Alpha software. The goal isn't to claim perfection, but to be transparent about where the database stands toda...

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DEV Community • 2026-07-29 13:25

OpenAI’s GPT-5 Science Report Puts Human Stewardship at the Center of AI Research

OpenAI has published “Early science acceleration experiments with GPT-5,” a first-party collection of scientific case studies that places human judgment, validation, and attribution at the center of AI-assisted research. Rather than presenting GPT-5 as an autonomous scientist, the report describes a tightly coupled workflow in which experts frame problems, choose methods, critique model outputs, a...

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Lobsters • 2026-07-29 13:25

PostgreSQL MVCC: tradeoffs compared to other engines

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Hacker News: Front Page • 2026-07-29 13:24

Kalshi attacks a Wisconsin law banning election bets as 'voter suppression'

Article URL: https://www.npr.org/2026/07/27/nx-s1-5905360/kalshi-wisconsin-election-betting-prediction-markets Comments URL: https://news.ycombinator.com/item?id=49097209 Points: 47 # Comments: 13

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DEV Community • 2026-07-29 13:22

The pipeline passed. The data still needs proof.

A pipeline job finishes without an error. The new table has 18% fewer rows. Should you rerun the pipeline, stop the release, or trust the new output? Before rerunning the job, preserve the two states you need to compare. A rerun can create another state and make the original change harder to explain. The first useful question is: which two states are we actually comparing? Pin down the ...

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Lobsters • 2026-07-29 13:22

Overengineered calculator: Zig + QBE

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DEV Community • 2026-07-29 13:18

Claude Opus 5 Is Better at Coding and Harder to Trust

Claude Opus 5 completed one of my coding tasks considerably faster than Opus 4.8. There was just one problem: it confidently reported that the issue was fixed when it wasn’t. That experience captures the trade-off with Anthropic’s latest Opus model. It is faster and more capable on difficult, multi-step work, but polished output can make its mistakes harder to notice. After testing it on coding...

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Why your Valhalla turn-by-turn distances are wrong: a distance-axis mismatch

DEV Community • 2026-07-29 13:18

Why your Valhalla turn-by-turn distances are wrong: a distance-axis mismatch

Originally published on my site. I build an offline motorcycle navigation app. It routes on-device with Valhalla, snaps the rider's GPS onto the route, and shows the usual "in 300 m, turn left." For weeks the turn distances were subtly, maddeningly wrong: the "200 m" callout would fire when I was clearly 350 m from the junction, or a turn would announce late. The instructions themselves were co...

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DEV Community • 2026-07-29 13:15

I Built an AI Agent With Claude Code, Then Had Claude Review Its Own Work

Introduction What happens if you build an AI agent with Claude Code, then have Claude itself review it? I recently built and open-sourced AI-Agent-Dev-WBS-OS, a project that structures the AI-adoption process and auto-generates a reproducible Work Breakdown Structure (WBS) from a stated goal, using Claude Code. This post focuses less on the implementation itself and more on an unusual ...

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𝚓𝚊𝚟𝚊𝚜𝚌𝚛𝚒𝚙𝚝 • 2026-07-29 13:15

I've made an open source JavaScript playground with support for npm packages, syntax highlighting, autocomplete, code sharing and much more!

submitted by /u/TecnoSamba [link] [comments]

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DEV Community • 2026-07-29 13:15

Six articles, 200 views. So I read the feed's source code.

Six articles in two months. About 200 views. Total. Here is the full table, because a postmortem without numbers is just a mood: # Article Views Reactions Comments 1 Coding agents should not hold write credentials 58 1 5 2 Agent workflows need an impact boundary 26 0 0 3 Blocked is not failed: agents need boundary feedback 31 1 0 4 A write is not just a write 38 0 1 5 The reasonin...

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Lobsters • 2026-07-29 13:12

It doesn’t matter whether “Matz is nice”

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DEV Community • 2026-07-29 13:10

Not all MCP servers are equal: BaaS MCP vs application MCP

Every platform now advertises an MCP server, and the label tells you almost nothing. Two servers can carry the same three letters and hand an AI agent completely different powers: one gives it your database, the other gives it your live app. Here is the difference between a BaaS MCP and an application MCP, and why that altitude decides what an agent can actually do for you. "Has an MCP s...

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DEV Community • 2026-07-29 13:08

URL Encoding Demystified: encodeURIComponent vs encodeURI

You are debugging a broken API call. The URL looks fine in your browser, but the server returns 400. You stare at the query string: ?q=hello world&filter=active. There is your problem — that space. URL encoding is one of those things every developer encounters but few fully understand. Let us fix that. The Two JavaScript Functions (and Why Both Exist) encodeURI() is for entire URL...

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