6.21.26 | Loupe raises app permissions awareness SMPTE makes standards free F 15 Strike Eagle II reverse project seeks DOS test pilots

This is a recap of the top 10 posts on Hacker News on Jun 21, 2026.Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights(00:00) - Intro (00:20) - Loupe – A iOS app that raises awareness about what native apps can see (01:38) - SMPTE Makes Its Standards Freely Accessible (03:09) - DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilots (04:33) - Renting a sewing machine from the library (05:51) - Developers don't understand CORS (2019) (07:19) - Slow breathing modulates brain function and risk behavior (08:32) - Your brain was never designed for this much bad news (09:31) - Linux eliminates the strncpy API after six years of work, 360 patches (11:01) - Temporary Cloudflare accounts for AI agents (12:05) - UHF X11: X11 Built for VisionOS and Apple Vision Pro (13:23) - Outro Loupe – A iOS app that raises awareness about what native apps can seehttps://github.com/mysk-research/loupehttps://news.ycombinator.com/item?id=48608645SMPTE Makes Its Standards Freely Accessiblehttps://www.smpte.org/blog/smpte-makes-its-standards-freely-accessible-openingstandards-library-to-the-global-media-technology-communityhttps://news.ycombinator.com/item?id=48610827DOS Game "F-15 Strike Eagle II" reversing project needs DOS test pilotshttps://neuviemeporte.github.io/f15-se2/2026/06/20/needyou.htmlhttps://news.ycombinator.com/item?id=48609766Renting a sewing machine from the libraryhttps://www.bbc.com/future/article/20260618-the-weird-and-wonderful-libraries-of-finlandhttps://news.ycombinator.com/item?id=48613755Developers don't understand CORS (2019)https://fosterelli.co/developers-dont-understand-corshttps://news.ycombinator.com/item?id=48614844Slow breathing modulates brain function and risk behaviorhttps://www.cell.com/neuron/fulltext/S0896-6273(26)00339-9https://news.ycombinator.com/item?id=48613555Your brain was never designed for this much bad newshttps://www.sciencedaily.com/releases/2026/06/260614012006.htmhttps://news.ycombinator.com/item?id=48615569Linux eliminates the strncpy API after six years of work, 360 patcheshttps://www.phoronix.com/news/Linux-7.2-Drops-strncpyhttps://news.ycombinator.com/item?id=48612943Temporary Cloudflare accounts for AI agentshttps://blog.cloudflare.com/temporary-accounts/https://news.ycombinator.com/item?id=48608394UHF X11: X11 Built for VisionOS and Apple Vision Prohttps://www.lispm.net/apps/uhf-x11/https://news.ycombinator.com/item?id=48610853