been working on this for awhile, so: delighted to share (most of) what I know about git internals & performance in a free ebook: gitperf.com↗

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When it comes to more visual work, like animations, coding agents don’t quite know what great feels like yet. Here’s my way of fixing it: emilkowal.ski/ui/agents-with…↗

Early look at Codex Avatars 👀 They would appear as interactive, draggable overlays on the desktop. 8 pre-made characters in total. Users will also be able to create and use their own Avatars! h/t video by @neocph↗

Ok, guys, hear me out. There are exactly 4 skills. If you master these, you have mastered everything. Learning a new one really sucks though. (Things I learned from trying to run an organization where everyone is a generalist) lesswrong.com/posts/KRLGxCaq…↗

Since Anthropic publish their system prompts we can generate a diff between Claude Opus 4.6 and 4.7 - here are my notes on what's changed simonwillison.net/2026/Apr/18/op…↗

here is our full Opus 4.7 vibe check we broke down how it performs on coding, writing, spreadsheets and more: every.to/vibe-check/opu…↗

As you may have seen, we announced some major updates to the Codex app yesterday. If Codex still feels intimidating, or like something you think only engineers use, this session is for you. I walk through how Codex can help with everyday work: - organizing files - combining C…↗

🆕 Building pi in a World of Slop youtube.com/watch?v=RjfbvD… @badlogicgames talks about why today's agents are still Merchants of Learned Complexity, and gives 3 specific ways that humans still add taste, value and judgment to the art of software engineering, and why you shoul…↗

Opus 4.7 feels more intelligent, agentic, and precise than 4.6. It took a few days for me to learn how to work with it effectively, to fully take advantage of its new capabilities. Will post a few more tips throughout the day, starting with this blog post: …↗

Stanford @CS153Systems, Week 1 (Full Lecture) AI Scaling, Bottlenecks, and Why Compute Isn't a Commodity Yet 00:00 Compute Coachella 00:29 Simple Life Heuristic 01:08 Uncertainty Creates Opportunity 01:42 Four Bottlenecks Framework 01:51 Empirical Proof Matters 02:05 Cloud Cos…↗

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6 pivots. Cease-and-desist from Microsoft. Then Harvard picked his AI over ChatGPT. Solo Founders Podcast ep 7 is live with @0interestrates of @juliusai. We talk about: How Rahul ended up solo The football analogy for building momentum Why 8/10 co-founder teams are fighting…↗

I rarely do interviews or talk about my personal life, but I made an exception for the team at @firstround. Their writer spent hours at my house. We talked about why I started Lenny's Newsletter, what motivates me to keep building it, and a lot of things I don't usually share p…↗

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Sure, everyone loves Claude Code but if you ask non-coders: they're all obsessed with Cowork. @JJEnglert at @tenex_labs is one of them, and he's giving us the power user's guide to getting started with @claudeai Cowork. In this ep, JJ walks me through: - How to set up Claude C…↗

The past few weeks I have heard story after story that has confirmed my suspicion: companies are setting a completely new standard for product velocity and ambition. If you're an exec in a tech company of any size, your board has probably asking you for over a year "how is AI imp…↗

Jesse Genet on Agentic Parenting Jesse Genet joins a16z's Sarah Wang and Katherine Boyle to discuss her journey from founder to parent, how she's using agents in her household, and how AI could transform parenting for the better. 00:00 YC founder turned homeschool mom 03:00 Dis…↗

Hey 👋 This is Alex. (the original version of this recap fist appeared on thursdai.news/zl - this version has way more pics) Do AI Engineers still need to read code in 2026? how about 2027? This was the most discussed question at the first @aiDotEngineer Europe conference last we…↗

And get the full piece from Kieran on running 44 AI agents across multiple projects: every.to/source-code/th…↗

In the era of agent experience, performance will become the new competitive advantage for great SaaS companies In January 2025, we first started debating the “death” of software. Anthropic had just open-sourced the Model Context Protocol and it was taking off. Satya Nadella pre…↗

⭐ New talk! andymatuschak.org/tat Coding agents might help us finally break out of two cages: the app model, which traps computing in one-size-fits-all silos; and programming as a specialization, which has crowded out cultures of imagination and domain insight.↗

Agent harnesses are becoming the dominant way to build agents, and they are not going anywhere. These harnesses are intimately tied to agent memory. If you used a closed harness - especially if it’s behind a proprietary API - you are choosing to yield control of your agent’s memo…↗

A love letter to Pi by @lucasmeijer↗

Delved into Cursor 3.0 -- turns out there's some interesting shenanigans going on.... "The most newsworthy finding is that "Cursor Agent" is a rebranded Claude Code running behind a local proxy with a find-and-replace engine that swaps "Claude"→"Cursor" in system prompts and mes…↗

The Models are Good Enough, The Harness Isn’t At Ramp, we hit 99% adoption of AI tools across the company. And then we noticed something concerning: most people were stuck. It wasn't that the models weren't good enough or that people lacked ambition, they just had no idea how to…↗

After @aiDotEngineer, which was full of useful criticism, I remembered that the most confident takes on AI often came from the least exposure. Rejection is easy, trial and error is expensive. I wrote about it. lucumr.pocoo.org/2026/4/11/the-…↗

Steve Yegge says people using AI coding agents are "10x to 100x as productive as engineers using Cursor and chat today, and roughly 1000x as productive as Googlers were back in 2005." That's a real number. I've seen it. I've lived it. But when people hear it, they reach for the w…↗

uffi ouchie wtf akshaychugh.xyz/writings/png/v…↗

People of pi. You can view my 18 minutes @aiDotEngineer Europe talk here. May it spark joy. And laughter. youtube.com/live/_zdroS0Hc…↗