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Simon Willison's Weblog Supports Webmention

100% effective

Every time I get into an online conversation about prompt injection it's inevitable that someone will argue that a mitigation which works 99% of the time is still worthwhile because there's no such thing as a security fix that is 100% guaranteed to work. I don't think that's...

Simon Willison's Weblog Supports Webmention

Cloudflare Project Galileo

Cloudflare Project Galileo I only just heard about this Cloudflare initiative, though it's been around for more than a decade: If you are an organization working in human rights, civil society, journalism, or democracy, you can apply for Project Galileo to get free cyber se...

xkcd.com Valid

Exoplanet System

Sure, this exoplanet we discovered may seem hostile to life, but our calculations suggest it's actually in the accretion disc's habitable zone.

Simon Willison's Weblog Supports Webmention

Quoting Paul Biggar

In conversation with our investors and the board, we believed that the best way forward was to shut down the company [Dark, Inc], as it was clear that an 8 year old product with no traction was not going to attract new investment. In our discussions, we agreed that continuity of the product [Darklang] was in the best interest of the users and the community (and of both founders and investors, who do not enjoy being blamed for shutting down tools they can no longer afford to run), and we agreed that this could best be achieved by selling it to the employees.

Paul Biggar, Goodbye Dark Inc. - Hello Darklang Inc.

Tags: entrepreneurship, programming-languages, startups

FeedCity Supports Webmention Valid

FeedCity is currently not reachable. I’m looking into it!

Update: Never mind. Just after I published this, everything seems to be back to normal. /Daniel

Simon Willison's Weblog Supports Webmention

The lethal trifecta for AI agents: private data, untrusted content, and external communication

If you are a user of LLM systems that use tools (you can call them "AI agents" if you like) it is critically important that you understand the risk of combining tools with the following three characteristics. Failing to understand this can let an attacker steal your data. Th...

Radiolab Updates instantly via WebSub
• WNYC Studios

Making a Monster

26:38
Episode one of Swimming with Shadows: A Radiolab Week of Sharks.Rodney Fox went into the ocean one summer day in 1963. He came out barely alive, his body torn apart by a great white shark. At the time, it was one of the worst shark attacks ever survived. After he recovered, ...

Daniel Pietzsch Verified Updates instantly via WebSub Supports Webmention Valid

🎬 A Girl Named Willow

Movie poster for “A Girl Named Willow”.

Solide Unterhaltung. Der Wald war cool, Max Giermann war cool. Der Tochter hat's gefallen. Wir haben im Kino zu viel Popcorn gefuttert.

Daniel Pietzsch Verified Updates instantly via WebSub Supports Webmention Valid

Florian asks everyone to please add their email address to their RSS feeds. Because then, FeedCity lets you directly reply to any of that feed’s posts via email (it’s a simple mailto: link).

Of course, I want you to do this, too! It’s one of those many underutilised data from a feed that can be really useful.

One thing to note is, that FeedCity won’t show the email reply button publicly (in FeedCity, all feeds have a public page) – it’s only shown for logged in users (or “citizens” as I call them). Prevents any email harvesting bots from gathering those addresses from the site.

Simon Willison's Weblog Supports Webmention

Quoting Joshua Barretto

I am a huge fan of Richard Feyman’s famous quote:

“What I cannot create, I do not understand”

I think it’s brilliant, and it remains true across many fields (if you’re willing to be a little creative with the definition of ‘create’). It is to this principle that I believe I owe everything I’m truly good at. Some will tell you should avoid reinventing the wheel, but they’re wrong: you should build your own wheel, because it’ll teach you more about how they work than reading a thousand books on them ever will.

Joshua Barretto, Writing Toy Software is a Joy

Tags: careers, programming

Daring Fireball Valid
John Gruber

DetailsPro

detailspro.app?utm_campaign=dfwwdc25

My thanks to DetailsPro for sponsoring last week at DF — including being a sponsor on The Talk Show Live From WWDC 2025. DetailsPro is a designer/developer tool that lets you design with SwiftUI anytime, anywhere — from iPhone, iPad, Vision Pro, and, of course, Mac.

With WWDC 2025’s introduction of Liquid Glass, Apple has introduced the biggest design overhaul since iOS 7. DetailsPro is ready for it, enabling you to prototype new and updated interfaces fast. You can build real SwiftUI layouts directly on your iPhone — no code needed. Export clean SwiftUI code straight to Xcode when you’re ready.

While everyone else is still thinking about how to adapt to the Liquid Glass era, you can already be building. DetailsPro is free to use, with pro features if you need them — via subscription, or a one-time purchase.

Link: detailspro.app?utm_campaign=dfwwdc25/

Global News Podcast

The Happy Pod: The tiny dog back home after a big adventure

28:28

A tiny dog famous for her big adventure reunites with her overjoyed owners, after 529 days in the wild. Also: the escaped Tennessee Zebra; why a man risked his life to save 41 others; and a footballing first for Senegal.

Daniel Pietzsch Verified Updates instantly via WebSub Supports Webmention Valid

🎬 The Nice Guys

Movie poster for “The Nice Guys”.

Ha, nice! Had a great time with this last night. Maybe I was a little too tired to follow the fast-paced plot and its twists and turns at all stages. But regardless, this was really funny, had great action, great dialogue, and the two detectives were just perfect. I especially like Ryan Goslings acting. A movie I could easily enjoy multiple times.

Daniel Pietzsch Verified Updates instantly via WebSub Supports Webmention Valid

🎬 A Clockwork Orange

Movie poster for “A Clockwork Orange”.

Wow, I haven't seen this in a long time. And I pretty much couldn't remember the second half. Enjoyed this a lot. The characters, the sets and the visuals in general, the soundtrack. The content is often questionable. It's partly gross, yet cheekily funny, but always entertaining.

The interesting thing to me when watching old classics like this, is how I discover how influential they have been. Or at least I think I do see those references in other movies. Anyway, I saw elements of Wes Anderson, Michael Haneke and Yorgos Lanthimos in there; and certainly forget a whole bunch of others.

Saw this at the Metropol, where the staff gave yet another lovely introduction to the film.

Simon Willison's Weblog Supports Webmention

Seven replies to the viral Apple reasoning paper – and why they fall short

Seven replies to the viral Apple reasoning paper – and why they fall short A few weeks ago Apple Research released a new paper The Illusion of Thinking: Understanding the Strengths and Limitations of Reasoning Models via the Lens of Problem Complexity. Through extensive exp...

Simon Willison's Weblog Supports Webmention

An Introduction to Google’s Approach to AI Agent Security

Here's another new paper on AI agent security: An Introduction to Google’s Approach to AI Agent Security, by Santiago Díaz, Christoph Kern, and Kara Olive. (I wrote about a different recent paper, Design Patterns for Securing LLM Agents against Prompt Injections just a few d...

Lex Fridman Podcast Updates instantly via WebSub

#472 – Terence Tao: Hardest Problems in Mathematics, Physics & the Future of AI

03:23:41
Terence Tao is widely considered to be one of the greatest mathematicians in history. He won the Fields Medal and the Breakthrough Prize in Mathematics, and has contributed to a wide range of fields from fluid dynamics with Navier-Stokes equations to mathematical physics &am...

Simon Willison's Weblog Supports Webmention

Anthropic: How we built our multi-agent research system

Anthropic: How we built our multi-agent research system OK, I'm sold on multi-agent LLM systems now. I've been pretty skeptical of these until recently: why make your life more complicated by running multiple different prompts in parallel when you can usually get something u...

Simon Willison's Weblog Supports Webmention

llm-fragments-youtube

llm-fragments-youtube Excellent new LLM plugin by Agustin Bacigalup which lets you use the subtitles of any YouTube video as a fragment for running prompts against. I tried it out like this: llm install llm-fragments-youtube llm -f youtube:dQw4w9WgXcQ \ 'summary of people ...

Simon Willison's Weblog Supports Webmention

Quoting Google Cloud outage incident report

Google Cloud, Google Workspace and Google Security Operations products experienced increased 503 errors in external API requests, impacting customers. [...] On May 29, 2025, a new feature was added to Service Control for additional quota policy checks. This code change and ...