6.5.26 | SpaceX and mega IPOs denied S&P entry, Anthropic offers open-source AI vulnerability framework, developing Ladybird is evolving

This is a recap of the top 10 posts on Hacker News on Jun 5, 2026.Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights(00:00) - Intro (00:18) - SpaceX, Other Mega IPOs Denied Fast Index Entry by S&P (01:45) - Anthropic's open-source framework for AI-powered vulnerability discovery (03:22) - Changing How We Develop Ladybird (04:39) - I'm skeptical about efforts to revolutionize schooling (05:51) - Open Code Review – An AI-powered code review CLI tool (07:18) - Branchless Quicksort faster than std:sort and pdqsort with C and C++ API (08:40) - C++: The Documentary (10:01) - Do transformers need three projections? Systematic study of QKV variants (11:21) - Samurai City (12:28) - Outro SpaceX, Other Mega IPOs Denied Fast Index Entry by S&Phttps://www.bloomberg.com/news/articles/2026-06-04/s-p-dow-jones-keeps-megacap-ipo-rules-as-is-after-consultationhttps://news.ycombinator.com/item?id=48405718Anthropic's open-source framework for AI-powered vulnerability discoveryhttps://github.com/anthropics/defending-code-reference-harnesshttps://news.ycombinator.com/item?id=48403980Changing How We Develop Ladybirdhttps://ladybird.org/posts/changing-how-we-develop-ladybird/https://news.ycombinator.com/item?id=48409191I'm skeptical about efforts to revolutionize schoolinghttps://www.scotthyoung.com/blog/2026/05/27/revolutionize-schooling/https://news.ycombinator.com/item?id=48376008Open Code Review – An AI-powered code review CLI toolhttps://github.com/alibaba/open-code-reviewhttps://news.ycombinator.com/item?id=48406358Branchless Quicksort faster than std:sort and pdqsort with C and C++ APIhttps://tiki.li/blog/blqsorthttps://news.ycombinator.com/item?id=48375445C++: The Documentaryhttps://herbsutter.com/2026/06/04/c-the-documentary-released-today/https://news.ycombinator.com/item?id=48408016Do transformers need three projections? Systematic study of QKV variantshttps://arxiv.org/abs/2606.04032https://news.ycombinator.com/item?id=48405931Samurai Cityhttps://worksinprogress.co/issue/samurai-city/https://news.ycombinator.com/item?id=48366090