HN Top 10 — May 10, 2026

Today’s Top 10 on Hacker News

1. Idempotency Is Easy Until the Second Request Is Different

⭐ 58   💬 12   👤 ludovicianul 🔗 Discuss on HN

For the happy path, it is even fairly small. The client sends: POST /payments Idempotency-Key: abc-123 Content-Type: application/json “accountId”: “acc_1”, “amount”: “10.00”, “currency”: “EUR”, “merchantReference”: “invoice-7781” The server checks whether it has seen abc-123. If not, it creates the payment.

2. Bun’s experimental Rust rewrite hits 99.8% test compatibility on Linux x64 glibc

⭐ 582   💬 547   👤 heldrida 🔗 Discuss on HN

Bun’s experimental Rust rewrite has achieved 99.8% test compatibility on Linux x64 glibc, a major milestone for the JavaScript runtime’s ongoing effort to rewrite its core in Rust. The near-perfect compatibility demonstrates significant progress toward improved performance, memory safety, and reliability over the original TypeScript implementation.

3. The One Dollar Counterfeiter

⭐ 145   💬 41   👤 cainxinth 🔗 Discuss on HN

In fiction as well as in real life, counterfeiters have always been portrayed as master forgers and artists who reproduced banknotes with astonishing precision. They were often shown as vast criminal enterprises and gangsters who destabilized economies with fake currency. Then there was Emerich Juettner, a frail old immigrant living alone in a shabby New York apartment, quietly printing one-dollar bills on a cheap hand press.

4. Show HN: Building a web server in assembly to give my life (a lack of) meaning

⭐ 294   💬 137   👤 imtomt 🔗 Discuss on HN

ymawky (pronounced “yuh maw kee”) is a web server written entirely in ARM64 assembly — syscall-only, no libc, fork-per-connection, written by hand. Developed for macOS on Apple Silicon, it serves static files from a www/ directory on port 8080, handles custom error pages from an err/ directory, and includes a Makefile for building. The author built it as a personal project to find meaning through low-level systems programming.

5. We see something that works, and then we understand it

⭐ 106   💬 32   👤 surprisetalk 🔗 Discuss on HN

Suppose that x is a variable of an unsigned type. In C/C++, it could be of type size_t for example. You have an expression like 6 * x and you want to know whether 6 * x overflows.

6. Casio S100X Japanese Lacquer Edition (JP Page Only)

⭐ 149   💬 54   👤 dr_kiszonka 🔗 Discuss on HN

The Casio S100X Japanese Lacquer Edition is a premium version of Casio’s flagship scientific calculator, featuring traditional Japanese lacquer (urushi) finish on the back panel. It combines Casio’s high-precision calculator engine with artisanal Japanese craftsmanship. The page is Japan-only, adding to its exclusivity among calculator enthusiasts.

7. Gemini API File Search is now multimodal

⭐ 100   💬 14   👤 gmays 🔗 Discuss on HN

Google has expanded the Gemini API File Search feature to support multimodal retrieval — it can now search through images, audio, and video files in addition to text documents. This enhancement enables developers to build richer Retrieval-Augmented Generation (RAG) applications that can query and reference content across multiple modalities, expanding what’s possible with vector search over uploaded files.

8. Internet Archive Switzerland

⭐ 616   💬 101   👤 hggh 🔗 Discuss on HN

Today, that mission continues to grow with an exciting new chapter: the launch of the Internet Archive Switzerland, a non-profit foundation based in St. The Internet Archive Switzerland, online at https://internetarchive.ch/, is a newly-formed Swiss non-profit foundation that will operate independently within its national context. Its efforts will initially focus on…

9. I’ve banned query strings

⭐ 424   💬 227   👤 susam 🔗 Discuss on HN

🗓️2026-05-08 • Tagged/web, /opinions”), /meta=only”) I don’t like people adding tracking stuff to URLs. Still less do I like people adding tracking stuff to my URLs. If I wanted to know I’d look at the Referer header; and if…

10. Gen Z Resentment Toward AI Grows as Adoption Stagnates and Workplace Fears Mount

⭐ 43   💬 23   👤 mgh2 🔗 Discuss on HN

Walton-GSV-Gallup survey finds young people are feeling angrier about AI, cautious about integrating AI in the classroom WASHINGTON, D.C., April 9, 2026 —Gen Z is growing increasingly angry about the role of artificial intelligence in their lives. A new Gallup survey released today by the Walton Family Foundation and GSV Ventures shows that a generation once seen as AI’s…