7.20.26 | I replaced a $120k bowling center system with ESP32s, Qwen 3.8, Claude Code uses Bun written in Rust

This is a recap of the top 10 posts on Hacker News on Jul 20, 2026.Feel free to leave feedback on Github: https://github.com/denolfe/hacker-news-highlights(00:00) - Intro (00:18) - Show HN: I replaced a $120k bowling center system with $1,600 in ESP32s (01:52) - Qwen 3.8 (03:11) - Claude Code uses Bun written in Rust now (04:43) - What I learned selling 2,500 MIDI recorders: Hardware is not so hard (05:57) - Claude Fable produced a counterexample to the Jacobian Conjecture (07:17) - Minecraft: Java Edition now uses SDL3 (08:28) - I joined the IndieWeb, here's what I learned (09:39) - Orion Browser by Kagi (10:58) - The Zen of Parallel Programming (12:09) - Bananas sprout in Rayleigh Garden UK after 15 years (13:14) - Outro Show HN: I replaced a $120k bowling center system with $1,600 in ESP32shttps://news.ycombinator.com/item?id=48968606Qwen 3.8https://twitter.com/Alibaba_Qwen/status/2078759124914098291https://news.ycombinator.com/item?id=48966120Claude Code uses Bun written in Rust nowhttps://simonwillison.net/2026/Jul/19/claude-code-in-bun-in-rust/https://news.ycombinator.com/item?id=48966569What I learned selling 2,500 MIDI recorders: Hardware is not so hardhttps://chipweinberger.com/articles/20260719-hardware-is-not-so-hardhttps://news.ycombinator.com/item?id=48966713Claude Fable produced a counterexample to the Jacobian Conjecturehttps://xcancel.com/__alpoge__/status/2079028340955197566https://news.ycombinator.com/item?id=48973869Minecraft: Java Edition now uses SDL3https://www.minecraft.net/en-us/article/minecraft-26-3-snapshot-4https://news.ycombinator.com/item?id=48967256I joined the IndieWeb, here's what I learnedhttps://en.andros.dev/blog/0b8e451e/i-joined-the-indieweb-heres-what-i-learned/https://news.ycombinator.com/item?id=48966984Orion Browser by Kagihttps://orionbrowser.com/https://news.ycombinator.com/item?id=48970894The Zen of Parallel Programminghttps://smolnero.com/posts/the-zen-of-parallel-programminghttps://news.ycombinator.com/item?id=48907390Bananas sprout in Rayleigh Garden UK after 15 yearshttps://www.bbc.com/news/articles/cvg8edqq5g5ohttps://news.ycombinator.com/item?id=48968063