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 articles
https://news.ycombinator.com/item?id=48886741

Claude Code sends 33k tokens before reading the prompt; OpenCode sends 7k
https://systima.ai/blog/claude-code-vs-opencode-token-overhead
https://news.ycombinator.com/item?id=48883275

What xAI's Grok build CLI sends to xAI: A wire-level analysis
https://gist.github.com/cereblab/dc9a40bc26120f4540e4e09b75ffb547
https://news.ycombinator.com/item?id=48877371

How to read more books
https://scotto.me/blog/2026-07-12-how-to-read-more-books/
https://news.ycombinator.com/item?id=48882056

Vint Cerf, “father of the Internet”, is retiring
https://techcrunch.com/2026/06/30/the-father-of-the-internet-is-finally-retiring/
https://news.ycombinator.com/item?id=48854168

Count Binface
https://countbinface.com
https://news.ycombinator.com/item?id=48887753

GhostLock, a stack-UAF that has existed in all Linux distributions for 15 years
https://nebusec.ai/research/ionstack-part-2/
https://news.ycombinator.com/item?id=48834309

Tiny Emulators
https://floooh.github.io/tiny8bit-preview/index.html
https://news.ycombinator.com/item?id=48884395

LARP – Revenue infrastructure for serious founders
https://www.larp.website/
https://news.ycombinator.com/item?id=48882569

So you want to learn physics (second edition, 2021)
https://www.susanrigetti.com/physics
https://news.ycombinator.com/item?id=48827126