DTF:HN for July 18, 2026

Your Daily Tech Feed covering the top 10 stories on Hacker News for July 18, 2026. Featuring: Regressive JPEGs, AWS: Inaccurate Estimated Billing Data – $1.7 billion, Funny item co-occurrences in 3.2M Instacart orders, Thanks HN for 15 years of support and helping me find my life's work, Porting nanochat to a TPU: what carries over from PyTorch, and what breaks, and more. Stories covered: 1. Regressive JPEGs https://maurycyz.com/projects/bad_jpeg/ HN discussion: https://news.ycombinator.com/item?id=48954851 2. AWS: Inaccurate Estimated Billing Data – $1.7 billion HN discussion: https://news.ycombinator.com/item?id=48945241 3. Funny item co-occurrences in 3.2M Instacart orders https://rogerdickey.com/funny-item-co-occurrences-in-3-million-instacart-orders/ HN discussion: https://news.ycombinator.com/item?id=48923929 4. Thanks HN for 15 years of support and helping me find my life's work HN discussion: https://news.ycombinator.com/item?id=48949551 5. Porting nanochat to a TPU: what carries over from PyTorch, and what breaks https://github.com/tucan9389/nanochat-jax/discussions/1 HN discussion: https://news.ycombinator.com/item?id=48917755 6. Reviving a 15-year-old netbook with Arch Linux https://parksb.github.io/en/article/41.html HN discussion: https://news.ycombinator.com/item?id=48907063 7. First atmosphere found on Earth-like planet in habitable zone of distant star https://www.bbc.com/news/articles/cy4kdd1e0ejo HN discussion: https://news.ycombinator.com/item?id=48947560 8. In-toto: A framework to secure the integrity of software supply chains https://in-toto.io/ HN discussion: https://news.ycombinator.com/item?id=48942603 9. TP-Link Kasa cameras leaked home GPS via unauthenticated UDP for 6 years https://github.com/BadChemical/IoT-Vulnerability-Research-Public/blob/main/TP-Link_Kasa_EC71/Kasa_EC71.md HN discussion: https://news.ycombinator.com/item?id=48952565 10. The Zilog Z80 has turned 50 https://goliath32.com/blog/z80.html HN discussion: https://news.ycombinator.com/item?id=48951461