Flux
A Fireside Chat with Cat and Thariq from the Claude Code team

A Fireside Chat with Cat and Thariq from the Claude Code team

Earlier this month I hosted a fireside chat session at the AI Engineer World's Fair with Cat Wu and Thariq Shihipar from Anthropic's Claude Code team. We talked about Claude Code, Claude Tag, Fable, coding agent security, evals, tool design, and how Anthropic use these tools themselves. The full video of the session is now available on YouTube. Below is an edited copy of the transcript, with extra links and my own bolded highlights. A few top-level notes if you don't want to watch the video or…

Simon Willison's Weblog
Quarterly Progress Report - Q2 2026

Quarterly Progress Report - Q2 2026

Our team of core developers works very hard to strengthen and improve the PHP language. In an effort to improve the way we communicate this work, from now on, we will be posting quarterly updates regarding their individual projects and efforts. Our core team consists of 13 people, distributed across 8 countries. Most of our contractors work part-time for The PHP Foundation and have other ventures aside from working on the PHP core. Also, this report is not meant to be a comprehensive list of…

The PHP Foundation
Tempest 3.0: The PHP Framework That Gets Out of Your Way

Tempest 3.0: The PHP Framework That Gets Out of Your Way

If you spend most of your PHP time in Laravel or Symfony, you may have noticed a framework quietly picking up momentum over the past couple of years. Tempest describes itself as “the PHP framework that gets out of your way,” and after spending time with version 3.0 — released February 12, 2026 — that […] The post Tempest 3.0: The PHP Framework That Gets Out of Your Way appeared first on PHP Architect.

PHP Architect
Reverse-engineering is cheap now

Reverse-engineering is cheap now

I keep hearing anecdotes from people who used coding agents to reverse-engineer and automate devices in their homes. I think this is an interesting illustration of the impact of the reduced cost of writing code. Prior to agents, it was entirely possible to reverse-engineer home devices. The problem was the ROI - was it really worth all of that effort? More importantly, any experienced programmer knows that undocumented, unstable APIs like that may well change or break in the future. Is that…

Simon Willison's Weblog
Who’s Afraid of Chinese Models?

Who’s Afraid of Chinese Models?

Who’s Afraid of Chinese Models? Interesting proposal from Ben Thompson that both addresses the hypocrisy of labs outlawing distillation against their models despite training on unlicensed data, and could help US open models compete more effectively with their Chinese counterparts: The U.S. should pass a law that (1) makes explicit that collecting data for training models is fair use, and (2) bars terms of service that forbid distillation, for U.S. companies at a minimum. Stopping distillation —…

Simon Willison's Weblog
Quoting Sam Altman

Quoting Sam Altman

We have been having extensive discussions around open source strategy. We will discuss it more at our next board meeting, but one thing we’d like to do soon is to create a language model with the approximate capability of GPT-3 that can run locally on consumer hardware and release that. We’d like to do it soon, before Stability or someone else does. In general, we think this helps discourage others from releasing similarly-powerful models, and makes it harder for new efforts to get funded.…

Simon Willison's Weblog
AI Mania Is Eviscerating Global Decision-Making

AI Mania Is Eviscerating Global Decision-Making

AI Mania Is Eviscerating Global Decision-Making Here's an entertaining perspective from Nik Suresh on the AI mania that is overwhelming the large companies that he consults with. It's crammed with spicy anecdotes from anonymous sources. In one extreme case, I have seen an executive confess that they had never even used ChatGPT or any AI tool in their life, immediately after producing a technical strategy for an organisation with $2B+ in revenue which was entirely centered around AI. Here's a…

Simon Willison's Weblog
Claude Code uses Bun written in Rust now

Claude Code uses Bun written in Rust now

In Rewriting Bun in Rust Jarred Sumner made the following claim: Claude Code v2.1.181 (released June 17th) and later use the Rust port of Bun. Startup got 10% faster on Linux but otherwise, barely anyone noticed. Boring is good. I decided to have a poke at my own Claude Code installation to see if I could find evidence that it was using Bun written in Rust. I found these two commands convincing: strings ~/.local/bin/claude | grep -m1 'Bun v1' For me this outputs Bun v1.4.0 (macOS arm64). The…

Simon Willison's Weblog