The best of Hacker News - August 20, 2025

1.
How we exploited CodeRabbit: From simple PR to RCE and write access on 1M repos

537 points

2.
Copilot broke audit logs, but Microsoft won't tell customers

349 points

3.
AGENTS.md – Open format for guiding coding agents

301 points

4.
Candle Flame Oscillations as a Clock

268 points

5.
D2 (text to diagram tool) now supports ASCII renders

261 points

6.
Without the futex, it's futile

245 points

7.
Emacs as your video-trimming tool

213 points

8.
How to Draw a Space Invader

213 points

9.
AnduinOS

105 points

10.
CRDT: Text Buffer

92 points

11.
How to Scale Your Model: How to Think About GPUs

76 points

12.
Tiny microbe challenges the definition of cellular life

67 points

13.
Drunken Bishop (2023)

56 points

14.
China blocked all HTTPS connection abroad for 1 hour in midnight

42 points

15.
Physically Based Rendering in Filament

34 points

16.
The End of Handwriting

31 points

17.
Rails Charts Using ECharts from Apache

24 points

18.
The Value of Hitting the HN Front Page

15 points

19.
Monoid-Augmented FIFOs, Deamortised

13 points

20.
How I Made Ruby Faster Than Ruby

8 points

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