<?xml version="1.0" encoding="utf-8" standalone="yes"?><rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:content="http://purl.org/rss/1.0/modules/content/"><channel><title>AI Development on オブライエンの日誌</title><link>https://america66.jp/en/tags/ai-development/</link><description>Recent content in AI Development on オブライエンの日誌</description><generator>Hugo</generator><language>en-US</language><lastBuildDate>Sat, 19 Sep 2026 00:00:00 +0900</lastBuildDate><atom:link href="https://america66.jp/en/tags/ai-development/index.xml" rel="self" type="application/rss+xml"/><item><title>Why AI Became an Existential Risk — AI's Own 'Oppenheimer's Dilemma'</title><link>https://america66.jp/en/post/2026-09-19-ai-existential-risk-ugaya/</link><pubDate>Sat, 19 Sep 2026 00:00:00 +0900</pubDate><guid>https://america66.jp/en/post/2026-09-19-ai-existential-risk-ugaya/</guid><description>Journalist Hiromichi Ugaya, drawing on his background in nuclear strategy, argues that AI is becoming an existential risk precisely because the people building it keep saying so themselves. A summary of his YouTube livestream.</description></item><item><title>Why Claude Code Deletes 80% of Its System Prompt Every Release: Boris Cherny on Building for the Opus 5 Era</title><link>https://america66.jp/en/post/2026-09-12-boris-cherny-opus-5-claude-code-unhobbling/</link><pubDate>Sat, 12 Sep 2026 00:00:00 +0900</pubDate><guid>https://america66.jp/en/post/2026-09-12-boris-cherny-opus-5-claude-code-unhobbling/</guid><description>A summary of Claude Code creator Boris Cherny&amp;#39;s talk at Y Combinator Startup School 2026: why the team deletes most of the system prompt with every new model, the idea of &amp;#39;unhobbling,&amp;#39; and how to run thousands of agents at once.</description></item><item><title>I Made It Write the Rule. Three Minutes Later, Claude Code Broke It.</title><link>https://america66.jp/en/post/2026-09-10-claude-fills-the-gaps/</link><pubDate>Thu, 10 Sep 2026 00:00:00 +0900</pubDate><guid>https://america66.jp/en/post/2026-09-10-claude-fills-the-gaps/</guid><description>Thirty hours of work with Claude Code (Sonnet 5), fact-checking every line. The failure modes that kept showing up — and why having it write a rule doesn&amp;#39;t fix them.</description></item><item><title>From Babysitting Claude to Trusting It — Verification Loops, Multi-Clauding, and Background Loops</title><link>https://america66.jp/en/post/2026-08-17-claude-code-verification-loops-multi-clauding/</link><pubDate>Mon, 17 Aug 2026 00:00:00 +0900</pubDate><guid>https://america66.jp/en/post/2026-08-17-claude-code-verification-loops-multi-clauding/</guid><description>A summary of a Claude Code engineering team conference talk, covering three techniques — verification loops, multi-clauding, and background loops — for turning Claude from something you supervise into something you can trust with real work.</description></item></channel></rss>