👋 Hey there, I’m Lenny. Each week, I answer reader questions about building product, driving growth, and accelerating your career. For more: Lenny’s Podcast | Lennybot | How I AI | My favorite AI/PM courses, public speaking course, and interview prep copilot P.S. Get a full free year of Google AI,…

Everyday I find myself grappling with the rapid adoption of AI and what it means for human ownership over the work we deliver and accountability for that work. As I think about how we’ve been approaching this at Monarch so far, I wanted to share my thoughts and hear from others. My father’s family…

(This post was written by a human. AI did no writing, only brainstorming) Something unprecedented is happening in software and how we build it. As a quick example, at Monarch, a few months ago, most of the code we written was written by hand, with maybe 20% written by AI. And the code written by AI…

Photo by Peter Herrmann on Unsplash The debate about the future of jobs and AI often polarizes into two extreme categories, neither of which I find particularly useful. On one side, there are the Doomers. They predict that AI will destroy millions of jobs. Most notably, Anthropic CEO Dario Amodei…

18 Months ago I wrote that I saw a three way battle to be the CFO’s preferred dashboard. The companies were in full land-grab mode in the wake of the SVB collapse and saw an influx of deposits. They all had unique approaches, but now those approaches are diverging even further. Far from competing…

On April 26th, 1956, the Ideal X set sail from Shed 154 at Marsh Street, Port Newark. The ship was a converted World War II tanker, but Malcolm McLean had refitted it to test an idea two decades in the making. For centuries, cargo was transported through a method called break-bulk shipping, where…

Guy Billout The enhanced, optimized self has fully arrived. We have metrics for everything: sleep scores, heart rate variability, glucose, recovery, and readiness. We track not only our biomarkers but also our social and professional markers: subscribers, followers, shares, views, likes. Investors…

For as long as software has existed it’s been principally designed for human consumption. Users clicked buttons, navigated workflows, learned new interfaces. They spent years developing muscle memory for products like Excel, Photoshop, Salesforce, Github, Jira, etc. And so emerged a simple logic…

Mediocre man flows through life. It is his birthright. He is not great man aiming at great results but merely trying to do enough of the right things over a long period of time such that it might lead somewhere interesting. Mediocre man is one who learns to trust the journey because he is fully…

There’s a moment every founder hits when they’ve reached their capacity ceiling. You’ll know you’re there after weeks of non-stop meetings with no clear rhyme or reason and feeling like you don’t have time to actually get anything done. If this sounds like you, you need to hire an EA. I’m 100%…

Learn how Amazon S3 Files simplifies Lambda functions by eliminating transfer code and /tmp constraints. See three modernization patterns with code examples for image processing, ETL pipelines, and multi-agent AI workloads. AWS Lambda functions that interact with Amazon Simple Storage Service…

Note: this post is published but still in progress. Spot something missing or amiss? Comment at the end 👍. This is a long article. If you just want three paragraphs, this is it: Few laptop families display their lineage as visibly as the ThinkPad. Since IBM introduced the ThinkPad notebook lineup in…

In November 2025, a pull request was opened for the Tailwind website repository to add llms.txt as an endpoint for, you guessed it, providing an LLM-friendly version of the popular CSS framework’s documentation. It first sat idle for a while and the issuer started pinging Tailwind employees for…

If you’d like to spend 6 or 12 weeks programming with kind, curious people, apply to RC! When we began rewriting the RC application earlier this year, I was very much inspired by one of the best question sets I’ve come across: the Oxford All Souls Examination papers. They give a choice of one or two…

It seems every generation has produced its own cohort of overeducated twentysomethings who are stranded between promise and reality, and routinely dismissed as lazy or slow growers. Ben Stiller’s 90s romcom Reality Bites captured that enduring state of uncertainty, creative ambition and emotional…

SAN FRANCISCO, May 21 (Reuters) - AI startup Modal raised $355 million in a new round of financing, valuing the company at $4.65 billion, CEO Erik Bernhardsson ​told Reuters. AI startups have been whipped by two shifts this ‌year: the surge in AI coding and the increasing scarcity of computing…

Hi there! I want to talk a bit about AI and the related shifts in the tech industry. I know this is top-of-mind for lots of y’all, and you might be wondering if it even makes sense to learn new programming skills in this environment. Let’s start with an uncomfortable truth: AI models have become…

Though I have never officially owned the title of DevOps or SRE, the majority of my engineering hours in the first few years of my career were spent on understanding and mitigating incidents. Without exageration, being oncall made me the engineer I am. I was oncall for distributed caching at Twitter…

Listen to Guido and Yoko discuss on The Trillion Dollar AI Software Development Stack on Apple or Spotify. Generative AI is here, and the first huge market to emerge is software development. At first glance, this might seem surprising. Historically, dev tools have not been among the top software…

Restate Team Updated May 7, 2026 11 min read What is Durable Execution? Durable Execution is a programming paradigm that makes ordinary code resilient to crashes, restarts, and infrastructure failures. A durable execution engine records each step of a function as it runs, so when something fails,…

TTHEY ATE TOGETHER every chance they could. They had to. The enormous photocopiers they were responsible for maintaining were so complex, temperamental, and variable between models and upgrades that it was difficult to keep the machines functioning without frequent conversations with their peers…

The social contract of writing May 25, 2026 5 min read llm writing LLMs are making inroads into just about every industry on the planet, they’re everywhere now. AI for X, AI for Y, if there’s a thing that somebody is willing to pay for, there’s another person looking for a way to use LLMs to do it.…

Amazon says it recently achieved a major breakthrough in networking design—and has been quietly deploying the new technology in its data centers since late last year. The company claims it has significantly increased data speeds while reducing energy use, potentially giving the tech giant an edge as…

Lately, I’ve been feeling like I’m losing control over the code I write when I work with agentic code generation. When I finish an agentic session, I get all the outward signs of having written code, but none of the internal processes that happen when we write code by hand. As a quick primer, the…

10th October 2025 - Link Blog Superpowers: How I'm using coding agents in October 2025. A follow-up to Jesse Vincent's post about September, but this is a really significant piece in its own right. Jesse is one of the most creative users of coding agents (Claude Code in particular) that I know. He's…

Hi — Asad here! Remember those $100M packages for AI researchers? Well, here’s the thing: When comp moves for the builders, it doesn’t take long to move for the sellers, too. So, now we’ve got $100M packages for CROs and enterprise reps clearing $10M a year. I even know a company that hired an SDR…

Open the Slurm launch script for OpenRLHF. It parses node IPs from scontrol show hostnames, hardcodes service addresses, and bootstraps a Ray cluster by hand. Now open the one for veRL. Same thing. NeMo RL? Same thing again. Three unrelated frameworks, three sets of nearly identical glue code, all…

Subscribe to receive notifications of new posts: 2026-06-04 VoidZero, the company behind Vite, Vitest, Rolldown, Oxc, and Vite+, is joining Cloudflare. As part of this change, all team members of VoidZero are joining Cloudflare, too. Before saying anything else, we want to make the most important…

Skills have become one of the most used extension points in Claude Code. They’re flexible, easy to make, and easy to distribute. But this flexibility also makes it hard to know what works best. What type of skills are worth making? How do you structure a skill? When do you share them with others?…

All tests were executed against Kafka 4.2.0 using Dimster (and also validated against 4.3.0). In the last post we measured the overhead that the mechanics of share groups adds, and saw that it is pretty small. Likewise we saw that raw throughput was also comparable to consumer groups and even saw it…

I bought a server this week. Not cloud credits, not a managed platform, not a serverless function bobbing in someone else's abstraction. A single rented box at Hetzner with four cores, eight gigs of RAM, and a name: mercury. By the end of the night it was running every site I care about, including…

We have models solving International Math Olympiad problems, AI writing production code, diagnosing diseases, passing the bar. Yet CEOs of the best startups still can’t tell bookings from revenue from ARR at first glance. Neither can most GPs at venture funds. The journalists covering these…

When I make software, this is my sorted list of priorities: Software should be useful to the end user and strive to become software you can love.Software should be correct, as malfunctioning software detracts from the utility users can derive from it.Software should be maintainable and efficient, in…

This post is about the physical laws of backpressure in software systems, latency death spirals, and why unbounded queues are a bug. If you have ever been on call or in charge of ops and system reliability during a massive traffic spike, you know the feeling. The alerts fire, the CPU goes to 100%,…