7.13.26 | Ask HN flag for AI-generated articles, Claude Code sends 33k tokens OpenCode sends 7k, xAI's Grok build CLI wire-level analysis

This is a recap of the top 10 posts on Hacker News on Jul 13, 2026.Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights(00:00) - Intro (00:16) - Ask HN: Add flag for AI-generated articles (01:29) - Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k (03:10) - What xAI's Grok build CLI sends to xAI: A wire-level analysis (04:51) - How to read more books (05:38) - Vint Cerf, “father of the Internet”, is retiring (06:52) - Count Binface (08:06) - GhostLock, a stack-UAF that has existed in all Linux distributions for 15 years (09:43) - Tiny Emulators (10:54) - LARP – Revenue infrastructure for serious founders (12:11) - So you want to learn physics (second edition, 2021) (13:32) - Outro Ask HN: Add flag for AI-generated articleshttps://news.ycombinator.com/item?id=48886741Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7khttps://systima.ai/blog/claude-code-vs-opencode-token-overheadhttps://news.ycombinator.com/item?id=48883275What xAI's Grok build CLI sends to xAI: A wire-level analysishttps://gist.github.com/cereblab/dc9a40bc26120f4540e4e09b75ffb547https://news.ycombinator.com/item?id=48877371How to read more bookshttps://scotto.me/blog/2026-07-12-how-to-read-more-books/https://news.ycombinator.com/item?id=48882056Vint Cerf, “father of the Internet”, is retiringhttps://techcrunch.com/2026/06/30/the-father-of-the-internet-is-finally-retiring/https://news.ycombinator.com/item?id=48854168Count Binfacehttps://countbinface.comhttps://news.ycombinator.com/item?id=48887753GhostLock, a stack-UAF that has existed in all Linux distributions for 15 yearshttps://nebusec.ai/research/ionstack-part-2/https://news.ycombinator.com/item?id=48834309Tiny Emulatorshttps://floooh.github.io/tiny8bit-preview/index.htmlhttps://news.ycombinator.com/item?id=48884395LARP – Revenue infrastructure for serious foundershttps://www.larp.website/https://news.ycombinator.com/item?id=48882569So you want to learn physics (second edition, 2021)https://www.susanrigetti.com/physicshttps://news.ycombinator.com/item?id=48827126