This is a recap of the top 10 posts on Hacker News on Sep 7, 2025.

• (00:00) - Intro

Show HN: I recreated Windows XP as my portfolio
https://mitchivin.com/
https://news.ycombinator.com/item?id=45154609

We hacked Burger King: How auth bypass led to drive-thru audio surveillance
https://bobdahacker.com/blog/rbi-hacked-drive-thrus/
https://news.ycombinator.com/item?id=45148944

How the “Kim” dump exposed North Korea's credential theft playbook
https://dti.domaintools.com/inside-the-kimsuky-leak-how-the-kim-dump-exposed-north-koreas-credential-theft-playbook/
https://news.ycombinator.com/item?id=45152066

A Navajo weaving of an integrated circuit: the 555 timer
https://www.righto.com/2025/09/marilou-schultz-navajo-555-weaving.html
https://news.ycombinator.com/item?id=45152779

Over 80% of sunscreen performed below their labelled efficacy (2020)
https://www.consumer.org.hk/en/press-release/528-sunscreen-test
https://news.ycombinator.com/item?id=45152374

Show HN: I'm making an open-source platform for learning Japanese
https://kanadojo.com
https://news.ycombinator.com/item?id=45152940

Oldest recorded transaction
https://avi.im/blag/2025/oldest-txn/
https://news.ycombinator.com/item?id=45149626

Stop writing CLI validation. Parse it right the first time
https://hackers.pub/@hongminhee/2025/stop-writing-cli-validation-parse-it-right-the-first-time
https://news.ycombinator.com/item?id=45151622

The World War Two bomber that cost more than the atomic bomb
https://www.bbc.com/future/article/20250829-the-bomber-that-became-ww2s-most-expensive-weapon
https://news.ycombinator.com/item?id=45109927

RFC 3339 vs. ISO 8601
https://ijmacd.github.io/rfc3339-iso8601/
https://news.ycombinator.com/item?id=45155179