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This is a recap of the top 10 posts on Hacker News on Sep 22, 2026.Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights(00:00) - Intro (00:19) - MiMo v2.6 (01:22) - Attention is all you have (02:41) - I don't want to read what you didn't write (04:05) - What Sun got wrong (05:12) - Grok 4.7 (06:39) - Spymarks, Not Watermarks (08:02) - Transformers Explained Visually (09:27) - NASA’s Mars Sample Return mission is dead (10:39) - AI coding has made CI a bottleneck, so we reworked ours to keep up (11:53) - Python Workers are now generally available (13:22) - Outro MiMo v2.6https://mimo.xiaomi.com/mimo-v2-6https://news.ycombinator.com/item?id=49792730Attention is all you havehttps://alicegg.tech/2026/09/21/attentionhttps://news.ycombinator.com/item?id=49787726I don't want to read what you didn't writehttps://blog.colinbreck.com/i-dont-want-to-read-what-you-didnt-write/https://news.ycombinator.com/item?id=49794330What Sun got wronghttps://bcantrill.dtrace.org/2026/09/20/what-sun-got-wrong/https://news.ycombinator.com/item?id=49787436Grok 4.7https://x.ai/news/grok-4-7https://news.ycombinator.com/item?id=49788838Spymarks, Not Watermarkshttps://brand.io/article/spymarks/https://news.ycombinator.com/item?id=49794615Transformers Explained Visuallyhttps://poloclub.github.io/transformer-explainer/https://news.ycombinator.com/item?id=49792342NASA’s Mars Sample Return mission is deadhttps://www.science.org/content/article/nasa-s-mars-sample-return-mission-deadhttps://news.ycombinator.com/item?id=49791939AI coding has made CI a bottleneck, so we reworked ours to keep uphttps://linear.app/now/ci-bottleneck-reworkedhttps://news.ycombinator.com/item?id=49792067Python Workers are now generally availablehttps://blog.cloudflare.com/python-workers-ga/https://news.ycombinator.com/item?id=49787142 What is Hacker News Highlights? Daily overview of the Top 10 Hacker News posts. Post and comment summarization by AI.