This is a recap of the top 10 posts on Hacker News on Sep 27, 2025.

Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights

• (00:00) - Intro

Open Social
https://overreacted.io/open-social/
https://news.ycombinator.com/item?id=45388021

Britain to introduce compulsory digital ID for workers
https://www.reuters.com/world/uk/britain-introduce-mandatory-digital-id-cards-2025-09-26/
https://news.ycombinator.com/item?id=45381810

SimpleFold: Folding proteins is simpler than you think
https://github.com/apple/ml-simplefold
https://news.ycombinator.com/item?id=45389267

US cities pay too much for buses
https://www.bloomberg.com/news/articles/2025-09-26/us-cities-are-paying-too-much-for-new-transit-buses
https://news.ycombinator.com/item?id=45386578

Traefik's 10-year anniversary
https://traefik.io/blog/celebrating-10-years-of-traefik
https://news.ycombinator.com/item?id=45357732

Why use mailing lists?
https://mailarchive.ietf.org/arch/msg/ietf/q6A_anL1u-Y9iXe-vboiOYamsl0/
https://news.ycombinator.com/item?id=45390121

CT scans of 1k lithium-ion batteries show quality risks in inexpensive cells
https://www.lumafield.com/article/finding-hidden-risks-in-the-battery-supply-chain
https://news.ycombinator.com/item?id=45364932

Moondream 3 Preview: Frontier-level reasoning at a blazing speed
https://moondream.ai/blog/moondream-3-preview
https://news.ycombinator.com/item?id=45391444

If you are harassed by lasers
https://www.laserpointersafety.com/harassment.html
https://news.ycombinator.com/item?id=45389965

Typst: A Possible LaTeX Replacement
https://lwn.net/Articles/1037577/
https://news.ycombinator.com/item?id=45393842