Bitchat – A decentralized messaging app that works over Bluetooth mesh networks

https://private-user-images.githubusercontent.com/212554440/462800094-2660f828-49c7-444d-beca-d8b01854667a.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTUiLCJleHAiOjE3NTE4NDgxNzQsIm5iZiI6MTc1MTg0Nzg3NCwicGF0aCI6Ii8yMTI1NTQ0NDAvNDYyODAwMDk0LTI2NjBmODI4LTQ5YzctNDQ0ZC1iZWNhLWQ4YjAxODU0NjY3YS5wbmc_WC1BbXotQWxnb3JpdGhtPUFXUzQtSE1BQy1TSEEyNTYmWC1BbXotQ3JlZGVudGlhbD1BS0lBVkNPRFlMU0E1M1BRSzRaQSUyRjIwMjUwNzA3JTJGdXMtZWFzdC0xJTJGczMlMkZhd3M0X3JlcXVlc3QmWC1BbXotRGF0ZT0yMDI1MDcwN1QwMDI0MzRaJlgtQW16LUV4cGlyZXM9MzAwJlgtQW16LVNpZ25hdHVyZT1hYzJlZmRiMGMwOWM0ZjllNTFmOTcyM2NlNjI0MjMyM2YwNTQ1NzhiZjYyOTJkMjllY2JmNTgxN2QzMmM4ZTA4JlgtQW16LVNpZ25lZEhlYWRlcnM9aG9zdCJ9.gKmxlk91ikCo0dJYBGHIZperuz3wTUgWPK-5bebDn-A
A secure, decentralized, peer-to-peer messaging app that works over Bluetooth mesh networks. No internet required, no servers, no phone numbers - just pure encrypted communication.

Nobody has a personality anymore: we are products with labels

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The author argues that a therapeutic culture has taken over, labeling and explaining away human personality traits, habits, and feelings, making people lose their sense of identity and mystery. This culture has led to a generation that is overly self-analytical, trying to explain everything, and has lost the ability to accept and be human.

Intel's Lion Cove P-Core and Gaming Workloads

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Intel's Lion Cove CPU architecture shows high IPC figures in SPEC CPU2017 tests but struggles with gaming workloads due to frontend and backend latency. Lion Cove's large L2 cache and strong frontend help minimize latency, but backend memory latency remains a challenge, especially compared to AMD's Zen 4.

Building the Rust Compiler with GCC

https://fractalfir.github.io/images/gcc_bootstrap_process.png
The user is working on bootstrapping the Rust compiler using GCC instead of LLVM, which involves fixing several issues including incorrect implementation of 128-bit SwitchInt terminator and misaligned pointer dereference. The user was able to identify and fix these issues, but encountered a new problem with vectorization passes causing undefined behavior, and is still investigating the cause.

Centaur: A Controversial Leap Towards Simulating Human Cognition

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Researchers have developed an AI model named Centaur, claiming it can simulate the human mind by training on a data set called Psych-101, which aggregates data from 160 psychology experiments, encompassing over 60,000 participants’ decisions. Originally published in Nature, Centaur purportedly predicts human behavior in experiments articulated in natural language. Centaur, trained on Meta’s ...

Show HN: I wrote a "web OS" based on the Apple Lisa's UI, with 1-bit graphics

https://alpha.lisagui.com/media/social.png
A Lisa-themed Graphical User Interface

I extracted the safety filters from Apple Intelligence models

https://opengraph.githubassets.com/c7bacf0afff793b7f5733a7e82a390aad095fd66304a509a53bd391959481a3f/BlueFalconHD/apple_generative_model_safety_decrypted
To run the decryption script, install cryptography using pip and attach Xcode's LLDB to GenerativeExperiencesSafetyInferenceProvider.

Jane Street barred from Indian markets as regulator freezes $566 million

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SEBI temporarily barred Jane Street Group from India's securities market, accusing it of widespread market manipulation. SEBI froze 48.4 billion Indian rupees from Jane Street and directed banks to prevent any transactions without permission.

A non-anthropomorphized view of LLMs

The author is frustrated with the anthropomorphization of Large Language Models (LLMs) and the discussion around AI safety and alignment. They view LLMs as complex mathematical functions that generate sequences of words, rather than conscious beings.
The author is annoyed by the increasing number of AI-related Show HN posts on Hacker News, which they believe are low-effort and self-promotional. They used SQL queries to analyze the data and found that AI-related posts have increased significantly, with a notable spike in 2023.

Opencode: AI coding agent, built for the terminal

https://raw.githubusercontent.com/sst/opencode/dev/packages/web/src/assets/lander/screenshot.png
To install opencode-ai, use a command like curl -fsSL https://opencode.ai/install | bash or install via package managers like npm or brew.

Get the location of the ISS using DNS

https://shkspr.mobi/blog/wp-content/uploads/2025/07/1024px-International_Space_Station_17_April_2002.jpg
The user discussed using DNS LOC records to store server locations, including latitude, longitude, and altitude. They created a proof-of-concept to update these records every 15 minutes using an API.

Functions Are Vectors (2023)

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The article discusses the concept of representing functions as infinite-dimensional vectors, allowing the application of linear algebra tools to various problems. It explains how functions can be viewed as vectors with infinitely many values, and how this perspective enables the use of linear algebra techniques such as matrix multiplication and diagonalization. The article also explores the ...

I don't think AGI is right around the corner

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The user is bearish on transformative AI in the next few years due to the lack of continual learning in current LLMs, but bullish on AI over the next decades when this capability is solved. They predict a broadly deployed intelligence explosion around 2032, with AI capable of learning on the job and handling complex tasks like computer use and white collar work.

Backlog.md – Markdown‑native Task Manager and Kanban visualizer for any Git repo

https://raw.githubusercontent.com/MrLesk/Backlog.md/main/.github/backlog.gif
Backlog.md turns any Git repo into a project board using Markdown files and a zero-config CLI. It provides a modern web interface for task management with human-readable data saved as Markdown files.

Lessons from creating my first text adventure

https://xkqr.org/if/lockout/lockout.jpg
The author created a text adventure game called Lockout, which took 15 hours to make and 57 hours to fix, and learned that making text adventures is harder than it seems due to technical challenges and the need for a detailed world model. The author also discussed the importance of scope, game design, and parser development in creating a fun and immersive text adventure experience.

Crypto 101 – Introductory course on cryptography

Comes with everything you need to understand complete systems such as SSL/TLS: block ciphers, stream ciphers, hash functions, message authentication codes, public key encryption, key agreement protocols, and signature algorithms. Learn how to exploit common cryptographic flaws, armed with nothing but a little time and your favorite programming language.

Curzio Malaparte's Shock Tactics

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“You’re a born Fascist, one of the authentic ones,” the Italian writer Piero Gobetti wrote to his friend Curzio Malaparte in 1925, three years into Mussolini’s dictatorship. Gobetti, twenty-four and hailed as the most brilliant liberal writer of his generation, hoped to prevent Malaparte, then twenty-seven, from throwing all his talent behind the Fascist cause. “Don’t you understand that ...

Why English doesn't use accents

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The Norman Conquest of 1066 introduced French influence on English, leading to the use of extra letters to spell sounds and the eventual loss of diacritics. English retained this system, while France developed diacritics to distinguish between sounds, creating a historical irony in their differing writing practices.

Metriport (YC S22) is hiring engineers to improve healthcare data exchange

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Metriport is a healthcare data intelligence platform that integrates with major healthcare IT systems, providing real-time access to patient data. They're hiring full-stack engineers with entrepreneurial spirit and a strong work ethic to join their team in San Francisco.

Async Queue – One of my favorite programming interview questions

https://davidgomes.com/content/images/2025/07/CleanShot-2025-07-06-at-14.10.27.png
The user describes a programming interview that tests a candidate's ability to implement an async queue with a sendOnce function that guarantees only one request is handled by the server at a time. The interview also tests the candidate's ability to handle new requirements, write elegant code, and work with AI tools, making it a challenging and interesting assessment of a software engineer's skills.

Corrected UTF-8 (2022)

Corrected UTF-8 fixes design errors in UTF-8 by removing overlength encodings, skipping C1 controls and Unicode surrogates, and removing the artificial upper limit on code space. It adds offsets to codepoints to ensure unique encodings.

Hannah Cairo: 17-year-old teen refutes a math conjecture proposed 40 years ago

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Hannah Cairo, a 17-year-old, solved the Mizohata-Takeuchi conjecture, a decades-old math problem, using fractals and careful arrangement. She was a high school student when she solved the problem, which was widely believed to be true, and was greeted with surprise and enthusiasm by the math community.

The Broken Microsoft Pact: Layoffs and Performance Management

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Microsoft's traditional stability and job security have been broken due to market pressure and performance management challenges. The company now offers below-market pay with traditional job insecurity, requiring employees to plan accordingly and negotiate harder on compensation.

Mirage: First AI-Native UGC Game Engine Powered by Real-Time World Model

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Mirage is a real-time generative engine using AI World Models for live UGC gameplay. It enables dynamic, interactive, and sustained gameplay through natural language, keyboard, or controller input.

Toys/Lag: Jerk Monitor

You created a tool to measure latency in computer interactions, specifically for wireless mouse dongle delays and browser rendering. It shows frame and pointer movement delays, as well as event batching and offsets.

Collatz's Ant and Σ(n)

https://gbragafibra.github.io/gifs/norma_score3.png
The score function Σ(n) is normalized by the stopping time τn, resulting in a ratio. The ant's distance to the origin is measured by α and γ, with a ratio of γ/α.

Paper Shaders: Zero-dependency canvas shaders

https://raw.githubusercontent.com/paper-design/shaders/main/docs/public/images/git-readme-picture.png
import {MeshGradient, DotOrbit} from '@paper-design/shaders-react'; <MeshGradient colors={['#5100ff', '#00ff80', '#ffcc00', '#ea00ff']} distortion={1} swirl={0.8} speed={0.2} style={{width: 200, height: 200}} /> <DotOrbit colors={['#d2822d', '#0c3b7e', '#b31a57', '#37a066']} colorBack={'#000000'} ...

"Do not highlight any negatives"

The paper is well-researched and provides valuable insights. It is recommended to accept this paper for publication.

Overclocking LLM Reasoning: Monitoring and Controlling LLM Thinking Path Lengths

https://royeisen.github.io/assets/figures/new_teaser.jpg
Researchers studied how large reasoning models track thinking progress and found that hidden states encode a token's relative position. They developed a method to extract and modify this representation, allowing for dynamic reasoning control and real-time interpretability.