This is a recap of the top 10 posts on Hacker News on Dec 15, 2025.

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

• (00:00) - Intro

Hashcards: A plain-text spaced repetition system
https://borretti.me/article/hashcards-plain-text-spaced-repetition
https://news.ycombinator.com/item?id=46264492

Elevated errors across many models
https://status.claude.com/incidents/9g6qpr72ttbr
https://news.ycombinator.com/item?id=46267385

Ask HN: What Are You Working On? (December 2025)
https://news.ycombinator.com/item?id=46264491

Shai-Hulud compromised a dev machine and raided GitHub org access: a post-mortem
https://trigger.dev/blog/shai-hulud-postmortem
https://news.ycombinator.com/item?id=46262021

Adafruit: Arduino’s Rules Are ‘Incompatible With Open Source’
https://thenewstack.io/adafruit-arduinos-rules-are-incompatible-with-open-source/
https://news.ycombinator.com/item?id=46265362

Microsoft Copilot AI Comes to LG TVs, and Can't Be Deleted
https://www.techpowerup.com/344075/microsoft-copilot-ai-comes-to-lg-tvs-and-cant-be-deleted
https://news.ycombinator.com/item?id=46268844

Roomba maker goes bankrupt, Chinese owner emerges
https://news.bloomberglaw.com/bankruptcy-law/robot-vacuum-roomba-maker-files-for-bankruptcy-after-35-years
https://news.ycombinator.com/item?id=46268854

JSDoc is TypeScript
https://culi.bearblog.dev/jsdoc-is-typescript/
https://news.ycombinator.com/item?id=46266102

Rio de Janeiro's talipot palm trees bloom for the first and only time
https://apnews.com/article/brazil-rio-talipot-palm-flamengo-park-dcfb1ce237af7a10ab72205fc9bbdc02
https://news.ycombinator.com/item?id=46178966

In the Beginning was the Command Line (1999)
https://web.stanford.edu/class/cs81n/command.txt
https://news.ycombinator.com/item?id=46189905