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Deep Dive into Bluesky's Architecture: A Decentralized Social Network Under the Hood

2025-08-21

Deep Dive into Bluesky's Architecture: A Decentralized Social Network Under the Hood

This article provides a deep dive into the architecture of the ATProto protocol powering the decentralized social network Bluesky. It thoroughly explains core concepts like Records, Blobs, Lexicons, DIDs, and Handles, and details how server components such as PDS (Personal Data Server), Relay, AppView, Labellers, and Feed Generators work together. The author contrasts ATProto with the Fediverse and provides an overview of relevant SDKs, documentation, and community resources, offering developers a comprehensive guide to understanding and contributing to the Bluesky ecosystem.

(mackuba.eu)

Development

Tech Nonprofits: Why Are They So Bad at Fundraising?

2025-08-21

The author, a regular philanthropist, observes that tech nonprofits are significantly worse at attracting donors than other types of charities. This post analyzes the shortcomings, highlighting the need for tech nonprofits to simplify donation processes (offering diverse methods like credit cards, DAFs, etc.), clearly communicate the impact of donations (detailing organizational goals, finances, project progress, and fund usage), and foster stronger human connection (proactively engaging with donors and building relationships). The author advocates for tech nonprofits to learn from successful models in other sectors to improve their fundraising efforts and achieve their missions.

(mitchellh.com)

Startup nonprofit donation

Bay Area AI Engineer: Building the AI-First Fraud Detection System

2025-08-21

Bay Area AI Engineer: Building the AI-First Fraud Detection System

Coris is hiring experienced AI Engineers to build an AI-first fraud detection system for global commerce. Responsibilities include fine-tuning and optimizing LLMs for fraud detection, building high-performance Django backend services, and handling massive data volumes from payment processors like Stripe and Adyen. The ideal candidate has 3+ years of Python/Django experience, expertise in LLM optimization and fraud detection, and the ability to ensure low latency and cost in high-concurrency environments.

(www.ycombinator.com)

AI Fraud Detection

Zedless: A Privacy-Friendly, Local-First Fork of Zed

2025-08-21

Zedless: A Privacy-Friendly, Local-First Fork of Zed

Zedless is a work-in-progress fork of Zed designed to prioritize privacy and local-first principles. It removes reliance on proprietary cloud services, telemetry, and automatic crash reporting. It emphasizes bring-your-own-infrastructure, allowing users to configure providers for network services (with no defaults and disabled by default). Importantly, it avoids contributor license agreements and ensures proper licensing for all third-party dependencies.

(github.com)

Development

Formalizing Fermat's Last Theorem in Lean: A Collaborative Open Source Project

2025-08-21

An international collaboration led by Kevin Buzzard is undertaking the ambitious task of formally proving Fermat's Last Theorem using the Lean theorem prover. Funded by the UK's Engineering and Physical Sciences Research Council and hosted at Imperial College London, this project pushes the boundaries of mathematical proof verification. By using a computer to verify the proof, the project explores the potential of formalization and automated verification in mathematics, with implications for future research.

(imperialcollegelondon.github.io)

Development Lean theorem prover

Gouach's Infinite Battery: Cracking Bosch Encryption and Reimagining E-bike Power

2025-08-21

Gouach's Infinite Battery: Cracking Bosch Encryption and Reimagining E-bike Power

After overcoming initial setbacks, Gouach developed the IP67-rated Infinite Battery, securing over $3.7 million in funding through Indiegogo and venture capital. This modular battery pack boasts compatibility with various e-bikes, notably conquering the challenge of encrypted communication with Bosch mid-drive motors. EU backers are slated to receive their kits in June, with US deliveries and an open online store to follow. Gouach's innovative approach, treating e-bike batteries as modular components rather than monolithic units, signifies a potential paradigm shift in the industry.

(arstechnica.com)

Hardware e-bike

SimpleIDE: Bringing Professional VB.NET Development to Linux

2025-08-21

SimpleIDE: Bringing Professional VB.NET Development to Linux

SimpleIDE is a lightweight, professional VB.NET IDE built with GTK# 3 on Linux using .NET 8.0. It provides a modern development environment for VB.NET projects, featuring multi-file tabbed editing, syntax highlighting, intelligent code completion, an integrated build system, debugging capabilities, and Claude AI assistance. SimpleIDE also boasts Git integration, customizable themes, and extensive keyboard shortcuts. This open-source project welcomes contributions.

(github.com)

Development

Python f-string Cheat Sheet: Mastering String Formatting

2025-08-21

This blog post presents a cheat sheet for Python's f-string formatting, covering various formatting options for numbers, integers, and strings, including fill, width, grouping, precision, and type. It also explores modifiers common to all objects, such as !s, !r, !a, and how to mix and match these modifiers with other format specifications. Whether you're working with numbers, integers, or strings, this cheat sheet empowers you to easily harness the power of Python f-strings, enhancing code readability and efficiency.

(fstring.help)

Development string formatting

Denmark Scraps Book Tax to Combat 'Reading Crisis'

2025-08-21

Denmark Scraps Book Tax to Combat 'Reading Crisis'

Facing a growing 'reading crisis', Denmark will eliminate its 25% book sales tax – the highest in Europe. This move, costing the state an estimated $51 million annually, aims to boost book sales and reading rates. The decision follows an OECD report revealing that 24% of 15-year-old Danes struggle with basic reading comprehension, a four-percentage-point increase over a decade. The Danish publishing industry had advocated for the tax cut, emphasizing the need for accessible physical books for all.

(www.rte.ie)

Misc reading crisis book tax

UTCP 1.0.1: A Flexible and Extensible Universal Tool Calling Protocol

2025-08-21

UTCP 1.0.1: A Flexible and Extensible Universal Tool Calling Protocol

The Universal Tool Calling Protocol (UTCP) 1.0.1 is a modern, flexible, and scalable standard for defining and interacting with tools across various communication protocols. Its modular core and plugin-based architecture enhance extensibility, testability, and packaging. UTCP emphasizes scalability, interoperability, and ease of use, offering plugins for HTTP, SSE, CLI, and more. The new version features a refactored architecture separating the core library from optional plugins, along with an improved search strategy and variable substitution mechanism.

(github.com)

Development Tool Calling Protocol Plugin Architecture

Anime Catgirls and the Linux Kernel: A Cost Analysis of an Anti-Crawler Mechanism

2025-08-21

Recently, more websites are using Anubis, an anti-crawler system that uses a mining-like process to verify visitor identity, requiring users to perform SHA-256 operations to gain access. The author questions the effectiveness of Anubis because it's trivial for AI crawlers with powerful computing capabilities but inconvenient for ordinary users. Through calculations, the author finds that even with tens of thousands of websites deploying Anubis, the cost of cracking its verification mechanism is virtually zero. The author finally provides a simple C program to bypass Anubis's restrictions and points out a vulnerability in the Anubis system.

(lock.cmpxchg8b.com)

Tech

SK Hynix Overtakes Samsung as World's Top DRAM Maker After 30+ Years

2025-08-21

SK Hynix Overtakes Samsung as World's Top DRAM Maker After 30+ Years

For the first time in over three decades, SK Hynix has surpassed Samsung Electronics as the world's largest DRAM manufacturer. Fueled by booming demand for AI memory chips and an exclusive supply deal with Nvidia, SK Hynix's market share soared. Samsung's share plummeted by 8.8 percentage points in the first half of 2025, its steepest decline since 1999. SK Hynix's success is largely attributed to its strong US market performance, particularly its supply of HBM3E chips to Nvidia, accounting for 54% of its Q1 DRAM operating profit. Analysts predict SK Hynix will maintain its lead in the near term.

(koreajoongangdaily.joins.com)

Tech SK Hynix

The Fundamental Flaw of Programming Languages: The Data vs. Object Debate

2025-08-21

The Fundamental Flaw of Programming Languages: The Data vs. Object Debate

The author argues that existing programming languages have a fundamental flaw in how they handle data and objects. They point out that languages need to distinguish between data (e.g., the integer 1) and objects (entities with identity and mutability). Many languages fail to clearly differentiate between the two, leading to code bloat and design challenges. The author believes ideal languages should allow developers to explicitly choose data or object representations and provide appropriate support. The article uses Java and Haskell as examples to contrast object-oriented and functional languages' approaches to data and objects, analyzing Erlang's advantages in this regard. The conclusion advocates for clearer distinctions between data and objects in programming language design to improve efficiency and code quality.

(www.tedinski.com)

Development objects

DiffMem: Git-Based Differential Memory for Smarter AI Agents

2025-08-21

DiffMem: Git-Based Differential Memory for Smarter AI Agents

DiffMem is a lightweight, Git-based memory system designed for AI agents and conversational systems. It leverages Markdown for human-readable storage, Git for version control and tracking memory evolution, and an in-memory BM25 index for fast retrieval. This proof-of-concept demonstrates how version control can create efficient, scalable memory for AI. DiffMem treats memory as a versioned repository, separating the current state from historical changes. This allows for efficient queries on the current knowledge while preserving the full history for deeper analysis. It addresses challenges in traditional AI memory systems like scalability and query efficiency, offering a human-readable, easily portable, and auditable solution. The system is composed of a writer agent, context manager, searcher agent, and an API layer. While currently a prototype, DiffMem showcases a promising approach to long-term AI memory management.

(github.com)

Development

Relive the 80s: Epson MX-80 Font Pack Released

2025-08-21

Michael Walden has recreated the fonts from the iconic Epson MX-80 dot matrix printer, popular in the 1980s. Manually transcribing the font data, he's expanded the character set to include Windows-1252 characters and offers the fonts in various formats (.fon, .ttf, .otf, .woff, .woff2). Perfect for retro printing simulations or displaying program listings on web pages and in documentation.

(mw.rat.bz)

Design retro font

Failed Experiment: A Git-Based Code Review Tool

2025-08-21

Failed Experiment: A Git-Based Code Review Tool

The author experimented with a tool called `git-review` to improve GitHub's code review process. The core idea was to treat code review as a commit stored within the repository, using in-code comments for review. However, the experiment was not successful. While adding comments directly to the code was highly efficient, modifying code under review proved tricky, especially dealing with conflicts and the friction of using `git push --force-with-lease`. The author ultimately abandoned the project but believes the core idea—in-code review—is valuable, and looks forward to future possibilities of improving code review through Git improvements.

(tigerbeetle.com)

Development

Learning GPU Architecture Through Memory Bandwidth Microbenchmarks

2025-08-21

Learning GPU Architecture Through Memory Bandwidth Microbenchmarks

Traverse Research delved deep into GPU architecture by measuring memory bandwidth across various GPUs using custom microbenchmarks. The article explores the complexities of GPU memory access, including descriptors, buffer types (byte address, structured, typed), and texture units. It also covers GPU memory hierarchy, cache policies (write-through, write-back, write-around), and latency hiding techniques. Experiments revealed significant differences in cache and VRAM bandwidth across architectures: the Meta Quest 3's Adreno 740 showed a dramatic bandwidth improvement using textures; the AMD Radeon RX 9070 XT exhibited differences between floating-point and integer loads; the Intel Arc B580 displayed unique patterns with varying data types; and the NVIDIA GeForce RTX 5070 Ti experienced bottlenecks with many writes to the same small memory area. These findings offer insights for optimizing GPU software performance, particularly in hardware-specific projects.

(www.evolvebenchmark.com)

Tech Memory Bandwidth Microbenchmark

PlutoPrint: Lightweight Python Library for Generating PDFs and Images from HTML/XML

2025-08-21

PlutoPrint: Lightweight Python Library for Generating PDFs and Images from HTML/XML

PlutoPrint is a lightweight Python library for generating high-quality PDFs and images directly from HTML or XML. Based on PlutoBook's rendering engine, it offers a simple API for creating reports, invoices, or visual snapshots. Use it via command line or Python API; pre-built binaries are available for Windows and Linux 64-bit. It even integrates with Matplotlib for generating and embedding charts.

(github.com)

Development PDF generation Image generation

FTC Sues LA Fitness Over Impossible-to-Cancel Memberships

2025-08-20

FTC Sues LA Fitness Over Impossible-to-Cancel Memberships

The Federal Trade Commission (FTC) is suing LA Fitness and other gym chains for allegedly making it nearly impossible for consumers to cancel memberships. The FTC's complaint highlights numerous obstacles, including restricted cancellation hours, requiring in-person cancellation with specific employees, and unclear instructions for mail cancellations. The FTC seeks a court order to stop these practices and provide refunds to affected consumers. This action underscores the FTC's commitment to protecting consumers from unfair business practices.

(www.ftc.gov)

Misc

AI Revolutionizes Chip Design: Experts Weigh In

2025-08-20

AI Revolutionizes Chip Design: Experts Weigh In

Semiconductor engineering experts discussed how AI can be applied to chip design to maximize its value and impact the design process. They envision AI shifting chip design from broadly domain-specific to a more granular approach with domains and sub-domains, catering to the unique needs of different verticals (e.g., automotive or mission-critical applications). AI tools promise to automate processes, improve debug analysis, and ultimately lead to fully autonomous workflows (Level 5), potentially reducing reliance on junior engineers. However, challenges remain in ensuring AI reliability and making its decision-making process transparent and understandable to engineers, guaranteeing design quality and efficiency.

(semiengineering.com)

Development

Pixel 10: Stunning Upgrade, Enhanced Imaging Capabilities

2025-08-20

Pixel 10: Stunning Upgrade, Enhanced Imaging Capabilities

The Google Pixel 10 boasts a satin-finish metal frame, polished glass back, and the iconic camera bar, available in four expressive colors: Obsidian, Frost, Indigo, and Lemongrass. Its 6.3-inch Actua display shines with a peak brightness of 3000 nits for exceptional viewing. Audio is improved, featuring exceptional bass for an enhanced multimedia experience. Camera improvements are significant, highlighted by the first-ever 5x telephoto lens on this Pixel tier. This lens offers fast autofocus, 10x optical quality, and up to 20x zoom with Super Res Zoom, making long-distance shots easier than ever.

(blog.google)

Hardware Camera Upgrade

Google's Pytype Project to End Support After Python 3.12

2025-08-20

Google's Pytype Project to End Support After Python 3.12

Google's static type checker for Python, Pytype, is reaching the end of its development lifecycle. Since its inception in 2012, Pytype has served Google developers well, contributing significantly to Python's type system. However, its bytecode-based design has proven limiting for future feature development. Google is shifting its focus to newer approaches, making Python 3.12 the last supported version. The team expresses gratitude to all contributors, especially Rebecca Chen for her decade of dedication. The Python typing ecosystem is robust; developers are encouraged to explore other mature solutions.

(github.com)

Development

Chernobyl Radiation Crashed a Soviet Rail System

2025-08-20

In the 1980s, programmer Sergei encountered mysterious crashes on an SM-1800 microcomputer at a Soviet rail station. The system, used for routing trains, would randomly fail at night. Investigation revealed the crashes only occurred when processing livestock from northern Ukraine and western Russia. Suspecting Chernobyl radiation, Sergei confirmed his theory: high radiation levels flipped bits in the SM-1800's memory. The Soviet government mixed contaminated and uncontaminated meat to avoid waste. Upon discovering this, Sergei immediately filed immigration papers. The computer crashes resolved themselves as radiation levels dropped.

(beza1e1.tuxen.de)

Tech

US Border Searches of Phones and Devices Surge, Raising Privacy Concerns

2025-08-20

US Border Searches of Phones and Devices Surge, Raising Privacy Concerns

US Customs and Border Protection (CBP) officials have broad authority to search anyone's phone upon entry, including US citizens. Newly released figures reveal a record number of phone and device searches over the past three months. From April to June 2025, CBP searched 14,899 devices belonging to international travelers. This surge coincides with the second Trump administration's aggressive immigration policies, raising concerns about privacy and freedom of speech. While CBP claims the percentage of searches is small, the practice creates a chilling effect, particularly for those critical of the administration, lawyers, and journalists. CBP's plans to procure advanced digital forensics tools further amplify these concerns.

(www.wired.com)

Tech phone searches

Luminal: A High-Performance Deep Learning Library with Search-Based Compilation

2025-08-20

Luminal: A High-Performance Deep Learning Library with Search-Based Compilation

Luminal is a deep learning library achieving high performance through search-based compilation. Its core is remarkably minimal, built upon just 12 primitive operations yet capable of supporting complex models like Transformers and convolutional networks. By aggressively fusing kernels and compiling shape-specific kernels at compile time, Luminal overcomes typical RISC limitations and automatically derives complex optimizations like Flash Attention. Its static compilation approach avoids runtime overhead, with Metal and CUDA support enabling fast execution on Macs and Nvidia GPUs. Significant performance gains have been demonstrated on models such as Llama 3 8B.

(github.com)

Development

Visual Drum Machine Built with React Flow

2025-08-20

Visual Drum Machine Built with React Flow

A visual drum machine and pattern sequencer built with Strudel.cc, React Flow, and styled with Tailwind CSS. Create complex musical patterns by connecting instrument and effect nodes via a drag-and-drop interface. Features include a wide array of instruments and effects, real-time pattern editing, group controls, and a well-organized project structure using Zustand for state management. A comprehensive getting-started guide is provided.

(github.com)

Development visual drum machine

AWS at 20: Under-the-Hood Improvements You Might Have Missed

2025-08-20

AWS at 20: Under-the-Hood Improvements You Might Have Missed

AWS is nearly two decades old, and its foundational services have evolved significantly. Many older blog posts are outdated. This post highlights key improvements: EC2 instances now allow hot modification of security groups and IAM roles, resizing, and EBS volume changes; S3 offers read-after-write consistency, eliminates ACLs, defaults to block public access and encryption; networking improvements include Transit Gateway and faster CloudFront updates; Lambda boasts extended runtime, container image support, and performance enhancements; EFS and EBS performance is dramatically better; DynamoDB supports empty fields and offers more reliable performance; cost optimization involves Savings Plans replacing Reserved Instances, per-second billing, and robust cost monitoring tools; authentication relies on IAM roles over users, with IAM Identity Center replacing SSO; overall reliability has drastically increased.

(www.lastweekinaws.com)

Tech service updates

Sony Raises PS5 Prices in the US

2025-08-20

Sony Raises PS5 Prices in the US

Due to the challenging global economic climate, Sony has announced a price increase for PlayStation 5 consoles in the US, effective August 21st. The new recommended retail prices are: PS5 - $549.99, PS5 Digital Edition - $499.99, and PS5 Pro - $749.99. Accessory prices remain unchanged, and no other price adjustments have been announced for other regions.

(blog.playstation.com)

Game

Goodbye Playwright, Hello CDP: A New Era in AI Browser Automation

2025-08-20

In the realm of AI browser automation, developers have long relied on adapter libraries like Playwright. However, these libraries' abstraction layers obscure the underlying complexities of browsers, leading to performance bottlenecks and difficult-to-solve edge cases. This article details how a team abandoned Playwright and directly used the Chrome DevTools Protocol (CDP) to build a faster and more reliable AI browser automation system. They developed a new Python CDP client library, `cdp-use`, and adopted an event-driven architecture, achieving cross-origin iframe support and significantly improving element extraction and screenshot speeds. This transition, while challenging, ultimately resulted in finer-grained control over the browser and more robust error handling, ushering in a new chapter for AI browser automation.

(browser-use.com)

AI

Rotten Tomatoes Inflation: A Hollywood Secret?

2025-08-20

Rotten Tomatoes Inflation: A Hollywood Secret?

A recent observation of nearly every film on Rotten Tomatoes being labeled "Certified Fresh" sparked suspicion. Data analysis reveals a significant rise in Rotten Tomatoes' average score over the past decade, coinciding with Fandango's acquisition. The author suggests Rotten Tomatoes may be manipulating scores by expanding its reviewer pool to include those giving more favorable reviews. While this might boost box office numbers short-term, it's detrimental to the long-term health of the film industry.

(www.statsignificant.com)

Tech Rotten Tomatoes movie ratings

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