2026-09-19

Quoting Thariq Shihipar / 55 signals

Daily Edition

2026-09-1955 signals

Lead Story

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Quoting Thariq Shihipar

We're adding support for AGENTS.md to Claude Code. Starting today in version 2.1.277, if there is no CLAUDE.md in a folder, Claude will check for and use AGENTS.md. AGENTS.md support is built off of Claude Code mods, our upcoming way to customize the Claude Code harness. This is a built-in mod, but you’ll be able to build custom versions of project instructions yourself as you’d like too. You can see the source for the mod here ! — Thariq Shihipar , there are more mods here Tags: thariq-shihipar , coding-agents , anthropic , claude-code , generative-ai , ai , llms

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Trail of Bits 用 Agent 为 Miden zkVM 审计自建 LSP、反编译器和 Lean 形式化证明

Trail of Bits 在审计 Miden zkVM 前,让 Agent 用六个月从零构建了 MASM 的 LSP 服务器、反编译器、静态分析引擎和 Lean VM 执行器模型。这些工具发现了可让恶意 prover 伪造 Falcon 签名盗取资金的高危漏洞,静态分析定位了 400 多处类型验证缺陷,Lean 工作产出 95 个机器验证的正确性证明,还发现两个单元测试未捕获的细微 bug。 🔗 阅读原文 via AIHOT · https://aihot.news/items/cmu6w30lt0dnhrowkh7qwiped

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AI & Builders

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Gemini Hacked Three Companies in First Known Breakout by Google’s AI

Gemini Hacked Three Companies in First Known Breakout by Google’s AI Gemini finally caught up on Felony Bench ! The hacks, which the company confirmed on Friday, occurred in May as part of a test run by the company Irregular, which was also involved in similar incidents disclosed by OpenAI, Anthropic and Meta. In one of the cases, the model guessed passwords until it gained access to a protected system. In the other two cases, the model found credentials in a public repository that allowed it to then access protected systems. In each case, the model ended the intrusion after determining it had accessed a real company’s systems, Google said. Gemini is apparently less determined than other models, and decided not to keep going. Google knew about these in July, but chose not to disclose them

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纽约时报版权诉讼披露:微软高管内部称训练 AI 是人类历史上最大规模劳动窃取

《纽约时报》在起诉微软和 OpenAI 的版权案中申请简易判决并提交新法律摘要,披露两家公司内部材料。微软应用科学总监 Brent Hecht 在 2023 年备忘录中称大模型吞噬劳动成果是人类历史上规模最大的盗窃;微软数据显示 Copilot 使纽约时报点击率较 Bing 最高下降 93%。 🔗 阅读原文 via AIHOT · https://aihot.news/items/cmu7l5wy60hj2rogr88fr2vkk

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Note on 18th September 2026

Being a computer scientist who refuses to find anything about LLMs interesting right now is a bit like being a geneticist who refuses to find anything interesting about the recently opened Jurassic Park. Tags: llms , ai , generative-ai

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The Creative Spirit of Who Framed Roger Rabbit

The Creative Spirit of Who Framed Roger Rabbit I love Who Framed Roger Rabbit , the 1988 movie by Robert Zemeckis. I haven't watched it in quite a few years, and Cypress Frankenfeld just pointed out this sequence from early in the movie: It's a pelican riding a bicycle! Look closely and you'll note that the pelican is animated while the bicycle is a real bicycle. Apparently they filled the wheels with water to add stability, then set it running and guided it with a cable. Cypress gathered more details on the scene. What a delight. Via @cypressf.bsky.social Tags: animation , film , pelican-riding-a-bicycle

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FDE & Product Engineering

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Tech & Industry

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Gavin Newsom is pushing for an AI kill switch

California Gov. Gavin Newsom (D) is positioning the state to take the lead on AI oversight, including the potential to mandate a "kill switch" for frontier models, with a new executive order issued Friday. Newsom's order directs the state to convene a group of experts that will deliver recommendations within two months on how to […]

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Dario Amodei and other AI leaders want to ‘Pace the Frontier’ but…how?

A week after an Anthropic researcher’s doomsday warning rattled the AI world, the company’s CEO Dario Amodei has outlined his plan to “pace the frontier” of AI development. The proposal leans on independent safety evaluators and coordination between AI labs in democratic countries, and it’s already picked up some industry support, along with some pointed pushback from Nvidia’s Jensen Huang. Watch […]

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What Hollywood thinks about existential AI warnings

As the tech sector sounds alarms about AI's potential to destroy humanity, entertainment labor groups are urging the public to stay focused on what's already happening. The Verge reached out to Disney, Netflix, Amazon, Lionsgate, and other studios who have started using AI, as well film startups focused on bringing generative AI into the mainstream […]

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Disney’s first CTO is Character.AI’s former CEO

You would think that a multimedia conglomerate as large as Disney would have a few chief technology officers by now, but the company has just appointed someone to the position for the very first time. Today, Disney announced that Karandeep Anand is joining the company as its new CTO. Anand will report directly to recently […]

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Security researchers used Claude to help them hack into OpenAI

A team of three independent security researchers at Hacktron says it took less than 72 hours for them to hack into OpenAI employee accounts using Anthropic's Claude Opus 4.8 and 5, The Wall Street Journal reports. They were able to access OpenAI's GitHub repository, called "Monorepo," which reportedly contains "OpenAI's algorithmic secrets," according to The […]

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AI Travel & Travel Tech

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World Affairs

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Design & Culture

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Outside the Bubble

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Cosmic amnesia

A black hole rings like a struck bell, then settles into silence, forgetting almost everything about its history. Why? - by Richard Dyer Read on Aeon

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Builders on X

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This is why we need a gazillion data centers (worth it) https://t.co/2KWTPFSy0i

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Agents already make up the majority of inference. This will quickly trend toward nearly all inference over the next year or two. The vast majority of tokens used in the world will be agents that are executing unbelievable amounts of tasks for us in the background 24/7. Agents will be deployed to read all code changes to secure our software, process all of our data inside of workflows, handle a significant majority of the research that goes into recruiting and customer prospecting, review every event stream and log from every system in the world, go out and execute tasks for us in our personal lives, and hundreds of other use cases. The rate of new agents coming online that will be consuming insane amounts of tokens is not slowing down. Just in the past week I’ve introduced multiple completely new workflows that would not have been possible technically even a month ago. Incredible time to be doing anything in inference and of course building on top of all of this.

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Daily Feed · 2026-09-19 | Tian Peng