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You run Lighthouse in Chrome DevTools on a client URL and see Performance 94. You paste the same URL into PageSpeed Insights and the lab Performance score drops to the sixties. The audits look related. The numbers do not. Neither result is “lying.” They ran the same Lighthouse family of audits on different machines, with different throttling behaviour, and often with different cache and extension state. That gap shows up constantly in agency Slack threads and client calls. People then optimis...

The Illusion of Server-Side Filters in Guest Sessions Data engineers integrating the linkedin-jobs-scraper often assume that selecting an input parameter means LinkedIn's database executes that query. It does not. Because this Actor operates without a login, cookies, or an API key, it relies entirely on LinkedIn's public-facing guest search pages. Over the last few years, LinkedIn has systematically stripped filtering capabilities from its guest-facing search endpoints. To compensate, the ...

Sixtennth RacketCon is this weekend Comments

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Article URL: https://www.deepseek.com/en/harness/ Comments URL: https://news.ycombinator.com/item?id=49929489 Points: 195 # Comments: 98

Article URL: https://www.firezone.dev/blog/building-reliable-directory-sync Comments URL: https://news.ycombinator.com/item?id=49929925 Points: 5 # Comments: 0

Article URL: https://inrng.com/2026/10/shimano-bicycle-museum/ Comments URL: https://news.ycombinator.com/item?id=49930047 Points: 55 # Comments: 8

Article URL: https://www.reuters.com/business/energy/us-tells-france-germany-release-diesel-stocks-or-face-us-export-ban-sources-say-2026-10-01/ Comments URL: https://news.ycombinator.com/item?id=49930086 Points: 44 # Comments: 32

A new California law places new rules on autonomous vehicles operators

Verdict: Hermes Agent's Computer Use feature is the most practical background desktop automation tool available in 2026. It lets an AI agent click, type, scroll, and drag across your real applications without moving your cursor, stealing keyboard focus, or switching virtual desktops. You and the agent work on the same machine at the same time. It is free, open source (MIT), works on macOS, Windows, and Linux, and runs with any vision-capable model — Claude, GPT, Gemini, or a local open model. S...

Generating Thumbnail Images in the Browser with Canvas API Blog thumbnail generators are usually server-side — send text, get back an image. I built one that runs entirely in the browser using Canvas. Here's what's actually hard about it. Korean Web Font Loading Korean fonts are large (often 3–10MB for a complete character set). Loading them for Canvas requires waiting for them to be ready: async function loadWebFonts () { const link = document . c...

Verdict: For most people starting agentic AI training in 2026, the free Hugging Face AI Agents Course is the best option. It costs nothing, issues a certificate, and makes you build and submit working agents rather than watch slides ( Hugging Face ). Pay for DeepLearning.AI's Agentic AI course by Andrew Ng if you want a tighter, structured treatment of agentic design patterns; a Pro membership is $25 per month billed annually or $30 per month billed monthly ( DeepLearning.AI ). Choose Vanderb...

This isn't a product post. It's a methodology post, about a failure in the checking process itself, which is arguably more useful to write down than the result would have been. The setup Working theory, stated in a public comment thread: people are frustrated enough with assistants acting without confirmation that the complaints should be easy to find — App Store reviews, Reddit threads, the usual venting places. The plan was simple: search for the phrases people would actually use ("it se...

A couple of quick mathematical tasks for this week's challenges. Task 1: Pythagoras Multiplied Task Description You are given a positive integer n . Find the number of all positive integer triplets ( a,b,c ) so that a 2 + b 2 = c 2 and a , b , and c are integers <= n . Example 1: n=20 --> 12 (3,4,5),(4,3,5),(5,12,13),(6,8,10),(8,6,10),(8,15,17),(9,12,15),(12,5,13),(12,9,15),(12,16,20),(15,8,17),(16,12,20) Example 2: n=7 -...

Android 17 QPR1 reached Pixel phones on September 15 with 84 new APIs for app developers, and for about three months exactly one phone maker is allowed to ship them: Google. The source code did not go to the Android Open Source Project (AOSP) with the release. GrapheneOS noticed, the Hacker News thread reached 951 points, and the more serious problem turned out to be the security patches stuck behind the same door. TL;DR The official API diff from level 37 to 37.1...

You put DEBUG=false in .env , restart, and the app is still in debug mode. If you have searched "environment variable false is true" or "os.getenv boolean", here is the whole explanation: an environment variable is always a string, and "false" is a non-empty string, so it is truthy. Python's os.getenv , Node's process.env and Vite's import.meta.env all hand you text, never a bool or a number. DEBUG = bool ( os . getenv ( " DEBUG " )) # True for DEBUG=fals...

I Built StudyBuddy AI: An Open-Source Study Assistant for Students Using Ollama and Llama 3 This is a submission for the Hacktoberfest Weekend Challenge: Build for a Friend . What I Built I built StudyBuddy AI , an AI-powered study assistant designed for students like me and my classmates. A friend mentioned that preparing for exams often takes longer than studying itself. Students spend hours creating summaries, flashcards, and quizzes from lecture notes. To solve ...

How I Built a Time-Travel Debugger for AI Agents What if debugging an AI agent worked more like debugging normal code? Pause execution. Inspect what happened. Go back to an earlier state. Change something. Then continue from there. That idea led me to build an open-source time-travel debugger for AI agents . GitHub: https://github.com/UjwalBagalkoti/ai-time-travel-debugger The Problem AI agents are becoming more capable, but debugging them is still sur...

Lingobuddy is a light, patient, and completely local AI language practice partner designed to help a friend practice conversational foreign languages (Spanish, French, German, Japanese, and more) without any fear of judgment. Whenever my friend makes a grammar, spelling, or phrasing mistake, LingoBuddy gently inserts a bracketed correction [Correction: ...] into the conversation before replying naturally in the target language to keep the dialogue flowing. I built LingoBuddy for a ...

Ask a language model which package to use and, now and then, it names one that does not exist. If someone registers that name first, the next developer — or the next coding agent — who follows the same suggestion installs whatever they put there. That is slopsquatting. We collect those names and score each one. A name that returns 404 is easy: it is a target. The hard case is a name that does resolve. Is it the project the model meant, or someone who registered the name after models started...

AI can write code. AI can explain code. AI can find bugs. AI can even build entire applications from a simple description. So a natural question for programmers is: If AI can do so much of the coding, what skill should a programmer develop that AI cannot simply replace? One of the most important answers is critical thinking . Programming has never been only about typing code. The difficult part is usually deciding what should be built, why it should be built, what as...

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Article URL: https://www.frogandtoad.ai/ Comments URL: https://news.ycombinator.com/item?id=49927760 Points: 55 # Comments: 7

Article URL: https://lwn.net/Articles/1097401/ Comments URL: https://news.ycombinator.com/item?id=49928121 Points: 160 # Comments: 88

Article URL: https://www.essex.ac.uk/news/2026/09/30/butterflies-use-optical-illusions-to-dodge-predators Comments URL: https://news.ycombinator.com/item?id=49928152 Points: 21 # Comments: 3

Article URL: https://www.singapore-samizdat.com/p/how-singapores-government-run-dating-service-firstdate-works Comments URL: https://news.ycombinator.com/item?id=49929113 Points: 14 # Comments: 7

AI Knows About Crypto Cards. It Just Won't Tell You.

The expansion addresses a growing gap in application security: as AI-generated code accelerates software delivery, most modern codebases are made up largely of

Digistore24's Lucas Coro on why chargebacks became a board metric, what a dispute really costs digital sellers and how Instant Bank Payments change the math.

How I built Axiom, a Rust CLI that detects and runs Node.js, Python, and Rust projects while reducing repetitive environment setup.