The best of Hacker News - April 20, 2025

1.
Librarians are dangerous

465 points

2.
Raspberry Pi Lidar Scanner

401 points

3.
Claude Code: Best practices for agentic coding

397 points

4.
The Web Is Broken – Botnet Part 2

323 points

5.
Android phones will soon reboot themselves after sitting unused for three days

314 points

6.
Show HN: I built an AI that turns GitHub codebases into easy tutorials

248 points

7.
First baby born in UK to woman with transplanted womb

229 points

8.
Ssl.com: DCV bypass and issue fake certificates for any MX hostname

179 points

9.
A unique sound alleviates motion sickness

122 points

10.
Everyone knows your location, Part 2: try it yourself and share the results

103 points

11.
The Icelandic Voting System (2024)

90 points

12.
Electromagnetism as a Purely Geometric Theory

88 points

13.
Novel color via stimulation of individual photoreceptors at population scale

74 points

14.
100 Years to Solve an Integral (2020)

69 points

15.
Welcome to the Era of Experience [pdf]

54 points

16.
Pretty State Machine Patterns in Rust

41 points

17.
Layered Design in Go

35 points

18.
Which year: guess which year each photo was taken

29 points

19.
Eccfrog512ck2: An Enhanced 512-Bit Weierstrass Elliptic Curve [pdf]

10 points

20.
Cache loop and memory loss in GPT – a user-side fix (tested with GPT itself)

3 points

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