DTF:HN for May 31, 2026

Your Daily Tech Feed covering the top 10 stories on Hacker News for May 31, 2026. Featuring: The Website Specification, London's Free Roof Terraces, Domain expertise has always been the real moat, Show HN: Breathe CLI – Paced resonance breathing in the macOS terminal, Avian Visitors, and more. Stories covered: 1. The Website Specification https://specification.website/ HN discussion: https://news.ycombinator.com/item?id=48343683 2. London's Free Roof Terraces https://diamondgeezer.blogspot.com/2026/05/londons-free-roof-terraces.html HN discussion: https://news.ycombinator.com/item?id=48343714 3. Domain expertise has always been the real moat https://www.brethorsting.com/blog/2026/05/domain-expertise-has-always-been-the-real-moat/ HN discussion: https://news.ycombinator.com/item?id=48340411 4. Show HN: Breathe CLI – Paced resonance breathing in the macOS terminal https://github.com/marekkowalczyk/breathe-cli HN discussion: https://news.ycombinator.com/item?id=48340315 5. Avian Visitors https://theodore.net/projects/AvianVisitors/ HN discussion: https://news.ycombinator.com/item?id=48343424 6. Shantell Sans (2023) https://shantellsans.com/process HN discussion: https://news.ycombinator.com/item?id=48341062 7. A pictorial introduction to differential geometry (2017) https://arxiv.org/abs/1709.08492 HN discussion: https://news.ycombinator.com/item?id=48343287 8. A Gentle Introduction to Lattice-Based Cryptography [pdf] https://cryptography101.ca/wp-content/uploads/lattice-based-cryptography.pdf HN discussion: https://news.ycombinator.com/item?id=48318624 9. The AV2 Video Standard Has Released (Final v1.0 Specification) https://av2.aomedia.org HN discussion: https://news.ycombinator.com/item?id=48340910 10. I found a seashell in the middle of the desert https://github.com/Hawzen/I-found-a-seashell-in-the-middle-of-the-desert#i-found-a-seashell-in-the-middle-of-the-desert HN discussion: https://news.ycombinator.com/item?id=48318402