I talked to Sid & Robert about building Claude Code: how much things have changed, how hard it's been to keep up with model capabilities and also what we miss about software engineering before AI. youtube.com/watch?v=S-sYlF…↗

This is the most important video I've ever made. In this, I explore the negative and positive mental health effects of AI coding, with data and expert commentary. youtu.be/iPUn1Fnfn0k↗

Machines create code now. That means machines can personalize your software, if it is open source. Closed source tools (like Claude Code) are now less desirable. blog.exe.dev/devtools-must-…↗

Why Software Factories Fail: Benchmarking the new frontier This is a continuation of Parts 1 and 2 of "Why Software Factories Fail" - [Part 1: the harness is not enough](x.com/dexhorthy/status/2080697380379427275) - [Part 2: turning the lights back on](…↗

The new rules of context engineering for Claude 5 models I’ve written previously about how to best [prompt the newest generation of Claude 5 models](x.com/trq212/status/2073100352921215386) and work with them iteratively to discover what you want to build. But when you send a m…↗

I interviewed @trq212 and @_catwu from the Claude Code team at @aiDotEngineer a couple of weeks ago - the video is now out, so I've published an annotated transcript of our conversation simonwillison.net/2026/Jul/21/ca…↗

You just hired a million bad employees. AI was supposed to replace human labor. It did the opposite. For the first time in history, humans are cheaper than software. And AI is creating more jobs than it eliminates. --- Technology has always solved one problem by creating a…↗

Monaco ships product faster than any startup I've ever seen. Today we're sharing our coding agent infrastructure in the hope that it helps other startups move faster: monaco.com/blog/agent-dev…↗

Model and effort in Claude Code: knowing more vs. trying harder Claude Code gives you two settings that both seem to "make the answer better": the model, and the effort level. But what do these actually do to the output? And how do you know whether to reach for a different model…↗

We've put together a short history of how Claude Code came to be, told by the people who built it and the early users who helped make it what it is today. anthropic.com/features/makin…↗

Everyone's always talking about agentic coding harnesses: Claude Code, Codex, OpenCode, Pi... the list goes on. But what's the difference between all of them? What even Is a harness anyway? In this thread, we'll take a look under the hood. (1/5)🧵↗

A conversation with Boris Cherny and Cat Wu on the path from Claude Code to Claude Tag, and how it spread from engineering to the rest of Anthropic. Claude Fable 5 is now available in Claude Tag.↗

Your AI's Memory Is Quietly Making It Dumber (I Cut Mine to 6 Files) I gave a talk last week and said it out loud: delete that memory, agent. When your agent learns a lesson, do not park it in some private memory file. Make a pull request that improves the skill, so the fix help…↗

I'm now running GLM 5.2 as my default model in claude code + cursor, and it's cost me *checks notes* $3.36 Today's ep of How I AI is my first reviewing an open weights model, @Zai_org's GLM 5.2 which (so far) is giving me Opus vibes without the opus $$$ I cover - how to set up…↗

Some more thoughts on looping in coding agents. lucumr.pocoo.org/2026/6/23/the-…↗

best writeup i've seen on steering Claude Code. every way you instruct it costs a different amount of context, and it takes some more seriously than others. clear enough that you can drop the article into Claude Code and have it clean up your own config. …↗

WTF Is a Loop? Part 2: The 15 Loops People Are Actually Running (and the Commands to Steal Them) Earlier this month I wrote [WTF Is a Loop? Peter Steinberger vs. Boris Cherny](x.com/mvanhorn/status/2063865685558903149), which did 3.6M views on what a loop even is. This is the se…↗

Our latest economic research introduces a framework for tracking Claude Code as it scales. Who is using Claude Code, and what are they using it for? How is the value of tasks changing? And how much does domain expertise shape whether a session succeeds? …↗

After two days with Claude Fable 5 the best way I can describe it is "relentlessly proactive" - here's an example where I dropped in a screenshot of a bug and it span up custom CORS Python servers and used pyobjc-framework-Quartz to capture screenshots …↗

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How do we automate business analytics with Claude? New blog post covering our best practices for skills, data foundations, and evaluations when building agents to perform data analysis: claude.com/blog/how-anthr…↗

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A harness for every task: dynamic workflows in Claude Code Last week, we released [dynamic workflows](code.claude.com/docs/en/workflows) in Claude Code. Claude can now write its own [harness](code.claude.com/docs/en/glossary#agentic-harness) on the fly, custom-built for the task…↗

I smell a takedown in 3...2...1 clawd.rip↗

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Codex, Claude Code, and Cursor are all great tools. They're also much more different than you think. I did a comparison of the three, but not in the usual way. I went deep on how they differ philosophically.↗

Automation is a lie. CLIs are over. The SaaSpocalypse is dumb. A year ago @danshipper came on the podcast to predict where AI was heading. He was remarkably right—including the call that everyone was sleeping on Claude Code. Dan has a unique lens into where things are going bec…↗

wait, prompts are code, files are state? YC catching up to ca. Q2 2025 mariozechner.at/posts/2025-06-…↗

Three months ago, Codex was trash for knowledge work. Now it's my daily driver. I use it for writing, recruiting, deep engineering work, and everything in between. It even keeps me at inbox 0. I chatted with @every's head of growth Austin @tedescau on @every's AI & I about what…↗

Fragments: updated guide on AI coding, video on harness engineering, how long should a function be, the problems of Software Brain and why AI is unpopular martinfowler.com/fragments/2026…↗