Why AI Became an Existential Risk — AI's Own 'Oppenheimer's Dilemma'

Source Post: YouTube (livestream “Uga-kin” by journalist Hiromichi “Hiro” Ugaya, September 18, 2026, roughly 2 hours 47 minutes) Content: A livestream analyzing why AI company leaders themselves are now warning that continued AI development could threaten human survival, framed through Ugaya’s graduate background in nuclear strategy and international security. Transcription: Auto-generated with faster-whisper (small model, CPU, int8) from spoken Japanese, so it likely contains recognition errors, filler words, and false starts. What follows is a reconstructed summary in my own words, not a verbatim transcript. One name that came through as “Koichi Takahashi” in audio appears, based on the described background (a biologist who moved into AI research), to refer to RIKEN researcher Koichi Takahashi, and is rendered that way below. Note that this livestream is Ugaya’s personal analysis and commentary — not a peer-reviewed paper or an official report — combined with catastrophe scenarios he asked Google Gemini to generate. Much of what follows is speculation, either his own or the AI’s, not established fact. ...

Why Claude Code Deletes 80% of Its System Prompt Every Release: Boris Cherny on Building for the Opus 5 Era

Source Post: YouTube (Y Combinator’s official channel), “Boris Cherny: We Cut 80% of Claude Code’s Prompt” Content: A ~36-minute conversation between Claude Code creator Boris Cherny (Anthropic) and Diana Hu at Y Combinator Startup School 2026 Transcript: Auto-generated with faster-whisper (small model, CPU, int8), then summarized and rewritten in this article rather than reproduced verbatim Fresh off the Opus 5 launch, Claude Code creator Boris Cherny sat down for a conversation that turned into a practical look at how to build products when the underlying model keeps getting more capable — including the habit of deleting most of Claude Code’s system prompt every time a new model ships. ...

I Made It Write the Rule. Three Minutes Later, Claude Code Broke It.

I spent about thirty hours with Claude Code, putting a small home-made app onto a home server. The model behind it is Claude Sonnet 5. Below, “Claude Code” means the tool; “Sonnet 5” means the habits in its output. For those thirty hours I checked every line it produced. Here are the patterns that kept coming back. This is about technical mistakes, not about how smart it is. This is a record of Sonnet 5. I haven’t used Opus or Fable, so I can’t speak to those. ...

From Babysitting Claude to Trusting It — Verification Loops, Multi-Clauding, and Background Loops

Source Post: X (formerly Twitter) Content: A conference talk (in English) by the Claude Code engineering team, roughly 37 minutes long. Transcription: Auto-generated with faster-whisper (small model, CPU, int8). This article is a summary written from that transcript, not a verbatim translation. If you use Claude Code for a while, it’s easy to end up in a routine where a human still has to watch everything Claude writes and correct it when it’s wrong. This talk lays out three techniques, built on top of each other, for reducing that supervision: verification loops, multi-clauding, and background loops. ...