This is a recap of the top 10 posts on Hacker News on Jul 1, 2025.

The new skill in AI is not prompting, it's context engineering
https://www.philschmid.de/context-engineering
https://news.ycombinator.com/item?id=44427757

Xfinity using WiFi signals in your house to detect motion
https://www.xfinity.com/support/articles/wifi-motion
https://news.ycombinator.com/item?id=44426726

Proton joins suit against Apple for practices that harm developers and consumers
https://proton.me/blog/apple-lawsuit
https://news.ycombinator.com/item?id=44426128

I write type-safe generic data structures in C
https://danielchasehooper.com/posts/typechecked-generic-c-data-structures/
https://news.ycombinator.com/item?id=44425461

YouTube No Translation
https://addons.mozilla.org/en-GB/firefox/addon/youtube-no-translation/
https://news.ycombinator.com/item?id=44416009

Melbourne man discovers extensive model train network underneath house
https://www.sbs.com.au/news/article/i-was-shocked-melbourne-mans-unbelievable-find-after-buying-house/m4sksfer8
https://news.ycombinator.com/item?id=44429182

Donkey Kong Country 2 and Open Bus
https://jsgroth.dev/blog/posts/dkc2-open-bus/
https://news.ycombinator.com/item?id=44424194

Claude Code now supports Hooks
https://docs.anthropic.com/en/docs/claude-code/hooks
https://news.ycombinator.com/item?id=44429225

The hidden JTAG in a Qualcomm/Snapdragon device’s USB port
https://www.linaro.org/blog/hidden-jtag-qualcomm-snapdragon-usb/
https://news.ycombinator.com/item?id=44426428

End of an Era
https://www.erasmatazz.com/personal/self/end-of-an-era.html
https://news.ycombinator.com/item?id=44426845