2025-08-20

36 篇热帖

1. Show HN: I was curious about spherical helix, ended up making this visualization (visualrambling.space)

Trying to understand how to move objects in 3D space

2. Gemma 3 270M re-implemented in pure PyTorch for local tinkering (github.com)

Implement a ChatGPT-like LLM in PyTorch from scratch, step by step - LLMs-from-scratch/ch05/12_gemma3 at main · rasbt/LLMs-from-scratch

3. Sequoia backs Zed (zed.dev)

From the Zed Blog: This investment lets us pursue our vision for bringing a new kind of collaboration directly into the IDE.

4. AWS in 2025: Stuff you think you know that's now wrong (www.lastweekinaws.com)

One of the neat things about AWS is that it's almost twenty years old. One of the unfortunate things about AWS is... that it's almost twenty years old. If you've been using the platform for a while, it can be hard to notice the pace of change in the underlying "foundational" services. More worryingly, even if you're not an old saw at AWS scrying, it's still easy to stumble upon outdated blog posts that speak to the way things used to be, rather than the way they are now. I've gathered some of these evolutions that may help you out if you find yourself confused.

6. Tidewave Web: in-browser coding agent for Rails and Phoenix (tidewave.ai)

Today, we're introducing Tidewave Web for Rails and Phoenix: a coding agent that runs directly in the browser alongside your web application, in your own development environment, with full page and code context.

8. Vendors that treat single sign-on as a luxury feature (sso.tax)

A list of vendors that treat single sign-on as a luxury feature, not a core security requirement.

9. D2 (text to diagram tool) now supports ASCII renders (d2lang.com)

In the latest release of D2 (0.7.1), we introduce ASCII outputs.

10. Home Depot sued for 'secretly' using facial recognition at self-checkouts (petapixel.com)

A customer has sued Home Depot, claiming it's been secretly using facial recognition tech on customers with cameras at self-checkout kiosks.

11. Emacs as your video-trimming tool (xenodium.com)

Marcin ‘mbork’ Borkowski has a nice post showing us how he trims video clips from our beloved editor. Trimming clips is something I do from time to ti...

12. Notion releases offline mode (www.notion.com)

With Notion’s offline functionality, your most important pages stay accessible and editable—no internet required. Whether you’re flying, commuting through dead zones, or working from a café with spotty Wi‑Fi, your projects are always within reach, keeping you productive wherever you are.

13. Shader Academy: Learn computer graphics by solving challenges (shaderacademy.com)

Shader Academy

Shader Academy 是一个专注于计算机图形学的学习平台,其核心教学方法是通过解决实际挑战来掌握相关知识

该平台采用实践导向的学习模式,用户通过完成特定的编程挑战或任务来理解计算机图形学的概念与技术。这种“边做边学”的方式旨在帮助学习者将理论知识直接应用于实际场景,从而更有效地构建技能。

14. Copilot broke audit logs, but Microsoft won't tell customers (pistachioapp.com)

Copilot Broke Your Audit Log, but Microsoft Won’t Tell You

15. Why you can’t grow cool-climate plants in hot climates (www.crimepaysbutbotanydoesnt.com)

Since moving to Deep South Texas 4 years ago I've come to realize that many plants I used to love growing in the cool mild maritime climate of the SF bay area are impossible to grow where I live. This is not just because of the high daytime heat. It's not as simple as that. Specifically, it is the h

16. Databricks is raising a Series K Investment at >$100B valuation (www.databricks.com)

SAN FRANCISCO, CA — August 19, 2025 — Databricks, the Data and AI company, today announced it has signed a term sheet for its Series K round, which it expects to close soon with backing from existing investors. This funding values the company at >$100 billion.

17. Show HN: Project management system for Claude Code (github.com)

Project management skill system for Agents that uses GitHub Issues and Git worktrees for parallel agent execution. - automazeio/ccpm

18. Analysis of the GFW's Unconditional Port 443 Block on August 20, 2025 (gfw.report)

The Great Firewall of China (GFW) conducted a large-scale, unconditional block targeting TCP port 443 on August 20, 2025. This report documents the measurements and analysis we conducted of that event.

19. Why Semantic Layers Matter (and how to build one with DuckDB) (motherduck.com)

Learn what a semantic layer is, why it matters, and how to build a simple one with DuckDB and Ibis using just YAML and Python

22. Closer to the Metal: Leaving Playwright for CDP (browser-use.com)

Why we dropped Playwright and switched to raw CDP for faster, more capable browser automation.

23. From M1 MacBook to Arch Linux: A month-long experiment that became permanenent (www.ssp.sh)

After 15 years on macOS, I made the leap to Arch Linux using Omarchy. Here's what I discovered about the trade-offs, workflow changes, and why shorter battery life and fan noise haven't sent me back to my MacBook.

28. Acronis True Image costs performance when not used (randomascii.wordpress.com)

Over two years ago I installed Acronis True Image for Crucial in order to migrate my data to a new SSD I had just purchased. It worked. I then left True Image installed “just in case”, and what harm could that possibly cause.Well, funny you should ask.I recently noticed that whenever I plugged or unplugged…

29. We’re Not So Special: A new book challenges human exceptionalism (democracyjournal.org)

A new book boldly challenges the concept of human exceptionalism.

30. Tiny microbe challenges the definition of cellular life (nautil.us)

A tiny microbe discovered by accident challenges the definition of cellular life

32. How to Draw a Space Invader (muffinman.io)

This interactive post will show you how to build your own fleet of space invaders by mixing geometry with randomness and a splash of color.

33. OPA maintainers and Styra employees hired by Apple (blog.openpolicyagent.org)

Note from Teemu, Tim, and Torin to the Open Policy Agent community Today we’re excited to announce that the creators of Open Policy Agent (along with many team members from Styra) have joined Apple …

34. Physics of badminton's new killer spin serve (arstechnica.com)

Adding a pre-spin affects shuttlecock's oscillating behavior, depending on direction of rotation.

35. Perfect Freehand – Draw perfect pressure-sensitive freehand lines (www.perfectfreehand.com)
# Perfect Freehand - 概要总结

## 核心功能
- **工具类型**:一个用于生成平滑、压力感应徒手线条的软件库或算法。
- **主要目的**:改善数字绘画或手写输入中自由线条的质量,使其看起来更自然、更连贯。

## 关键特性
- **压力感应**:支持输入压力数据(通常来自数位笔或触控设备),并利用压力信息来调整线条的粗细。
- **线条平滑**:通过算法处理原始输入点,消除抖动和锯齿,生成平滑、美观的矢量路径。
- **应用接口**:通常以代码库的形式提供,供开发者集成到绘图应用、设计工具或交互式网页中。

## 典型应用场景
- 绘图软件的画笔工具。
- 在线白板或注释工具。
- 任何需要高质量手写或手绘线条输入的数字界面。
36. AGENTS.md – Open format for guiding coding agents (agents.md)

AGENTS.md is a simple, open format for guiding coding agents, used by over 60k open-source projects. Think of it as a README for agents.