Jane Street: Socratic Tutor

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User requests structured Socratic tutoring on a specific topic, using the maieutic method to teach by asking questions that force reasoning and explanation.

A live tree of systemd jobs on the boot console

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Tim Peters has died

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The author shares a personal tribute to Tim Peters, a key figure in Python's development and design evolution. He credits Tim with influencing his own programming style and career, citing his positive influence on the language's growth from 2001 to 2014 as Director of the Python Software Foundation.

93% of paint splatters are valid Perl programs (2019)

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Researchers found that 93% of paint splatters can be parsed as valid Perl code, but they also identified seven examples that are not. These invalid programs were created by OCR software and did not follow standard Perl syntax.

Critical RCE Vulnerability in Apache HTTP Server

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A critical synchronization vulnerability (CVE-2026-119618) in Apache HTTP Server's HTTP/2 module allows remote attackers to achieve arbitrary code execution. Vulnerable installations should be updated to version 2.4.71 or later, or temporarily disabled until patched.

Legocam: My Lego webcam from 2000, working on a modern Mac

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The user created a custom LEGO camera using the Logitech QuickCam Web and wrote software to make it work with macOS. The code, called legocam, is now available for anyone to use and has been ported to Linux.

AWS emulator

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AWS Emulator is a local emulator of AWS APIs for testing and development without incurring additional service fees. It can be installed on various platforms, including Linux, Windows, and macOS, with optional telemetry data collection enabled by default.

Nvidia is preparing to oust Jensen Huang

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A false smoke alarm almost drowned Jane Street's only NYC datacenter

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The author recounts a false smoke alarm in Jane Street's NYC datacenter, which triggered sprinklers and threatened to destroy servers. He pulled power cords to prevent damage before the temperature rose too high.

Gemini Decisions API

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The Gemini Decisions API offers fast, closed-set decisions with a new model called Gemini Decision 1, available through the Google AI Studio. The API provides primitives for bounded choices and scores options in a single forward pass with low latency and no output token charges.

I'm Working on a FOSS Linux Pinbal Simulation Engine

You've made significant progress on your Linux pinball simulation engine, adding features like sound systems and physics improvements. You plan to showcase the demo at IAAPA Expo next week to gauge interest in support and collaboration for future development.

United Airlines bans AI agents from booking flights on behalf of travelers

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United Airlines is banning AI agents from making flight reservations due to security risks and potential rule violations. The airline aims to retain control over the booking process, avoiding additional expenses associated with AI bot searches.

Lock Your GitHub Actions

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GitHub Actions now support lockfiles, which can be used to prevent supply-chain attacks. Lockfiles are updated periodically and should be verified in CI to ensure they're up-to-date and not corrupt.

Emacs in the Age of Magic

The author reflects on the impact of AI on Emacs, a popular text editor, and how it has changed the way people interact with software.

I gave an agent a lakehouse and control of my garden

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The author built a LakehouseBox system to monitor and control their small vegetable garden, using sensors and cameras to track soil moisture, temperature, wind, rain, solar radiation, leaf wetness and more. The system uses Apache Iceberg tables for data storage and DuckDB for querying.

The Utah Teapot

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The Utah Teapot is a historical computer graphics model created by Martin Newell in 1975, with various versions developed over the years. The latest version, released in 2026, features improved interior design and texture mapping options.

Darling Development Update – Q4 2026

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The Darling project has adopted a new policy on AI-assisted contributions and achieved initial ARM64 support, allowing it to compete with Apple on a more level playing ground. The team plans to stabilize AppKit support, add GUI applications, and make the codebase easier to contribute to.

A general purpose Apple Silicon layer for x86-64 PCs

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Stela is a general purpose Apple Silicon layer for x86-64 PCs, still in development with low boot chances. It translates arm64e code to x86-64 and supports NVIDIA GPUs, but requires specific hardware and setup.

Grote Reber and the 'Square Kilometre Array' Near Bothwell, Tasmania (2017)

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Hyper-Realistic Sand with WebGL2

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Built with WebGL2 and JavaScript. Push grains with your finger, tilt your phone to make them slide, or shake to scatter them. Play in your browser on phones, tablets and desktops.Pour

Did Life Begin in an RNA World?

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Scientists propose that life began as an RNA world, where RNA molecules acted as both genetic carriers and catalysts. However, recent experiments suggest that self-sustaining RNA evolution may be difficult due to errors in replication.

My AI agents found an unmapped Maya site?

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A user used AI agents to analyze NASA lidar data and discovered a previously unmapped Maya site in Mexico, which was later found to have been mapped by archaeologists. The discovery took less than 72 hours from initial thought to official reply from the Mexican government.

Lean Grimoire

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I rebuilt a Javascript interactive textbook called "Lean Grimoire" to teach propositional and first-order logic, adding features like in-progress proof display and fantasy mode. I'm looking for playtesting to improve the app as a teaching tool for logical proofs.

Faster Retrieval for Better, More Efficient RAG

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Researchers propose Amortizing Maximum Inner Product Search (MIPS) using learned support functions, which trades off accuracy for speed. This approach uses neural networks to mimic the ground-truth support function and can be used for routing queries towards their best match.

Slavdom Unearthed: Marian Wawrzeniecki's Neopagan Paintings (1891–1923)

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A nude figure with a skull-like face lies on an open book, surrounded by Art Nouveau illustrations of a red-haired woman and another image obscured by hair. The artist, Marian Wawrzeniecki, created this 1910 painting as part of his neopagan style that blended archaeology and folk art.

The Lost World of Aquaterra

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Show HN: Yogurt – Free, private, open-source alternative to Granola

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Yogurt is a free, open-source app that records and transcribes calls on Macs with Apple Silicon, PCs with Windows 10, and Linux computers. It uses AI models to generate summaries and answers locally on the computer without requiring an account or internet connection.

Huawei releases MACaQ, its internal quantizer for local inference

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MACaQ is a model-agnostic calibrated quantization method that can reduce the parameter size of large models by 11 times while maintaining comparable perplexity. It supports various models, including text, image, video, and audio models, and is licensed under the Apache License 2.0.

Using voltage glitching to unleash the A100 in my mining card

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A researcher has discovered a voltage fault injection (VFI) vulnerability in the GA100 die, allowing for arbitrary fuse blowing and unlocking of NVIDIA's CMP 170HX 8GB card to its maximum capability. This unlocks features like NVLink, PCIe Gen4, and more.

Can a Linear Program Do Weight-Space Programming?

Researchers at MIT CSAIL used GPT-6 Astra to edit its weights and improve math performance by 40.2% on MATH-500, reducing looping behavior. They found that the edits were equivalent to a constant push along a specific direction in the residual stream, which can be added directly without weight changes.