I'm ready to accept a definition of "agent" that I think is widely-enough agreed upon to be useful, at least in the AI engineering space: An LLM agent runs tools in a loop to achieve a goal (I've been dismissing the term as hopelessly ambiguous for years) simonwillison.net/2025/Sep/18/...

I don’t think people yet fully appreciate how the “lethal trifecta” restricts agentic AI use cases. When private data access, untrusted inputs, and external actions converge, you create a structural vulnerability we don’t yet know how to contain. simonwillison.net/2025/Jun/16/...

Ever wondered how AI coding agents like Claude Code, Github Copilot and Codex work? So did I! So of course I had to go and build one myself 😅 youtu.be/7oTPNr9APGE #claudecode #codex #cursor #copilot #anthropic #openai #llm #agenticai #ai

Can AI coding agents do Test-Driven Development (TDD) properly? They sure can! In this week's video I take a look at two approaches: prompt engineering & using the tdd-guard library 📺 youtu.be/IVdYaVKuekk #ai #aiassistedcoding #claudecode #tdd #testdrivendevelopment #tddguard

LLMs and coding agents are a security nightmare garymarcus.substack.com/p/llms-codin... #ai #genai #llm #programming

AI coding assistants promise 10x productivity gains. The research tells a different story. Full breakdown here: youtu.be/MLSs8Asmthk #aiassistedcoding #claudecode #githubcopilot #dora

AI may not make you a 10x engineer, but understanding how to use AI assisted coding frameworks can cost 20x less. Diagram shows an experiment by @jovaneyck.bsky.social using MCPs with Claude Code vs without MCPs

It's the 10th anniversary of this joke. I originally posted it on Twitter, and I felt it deserved a new home. It has been quoted in books, presentations, academic lectures, and t-shirts, and it's probably the only thing I'll be remembered for 🤣

Everyone’s chasing 10x boost from coding assistants. In my coding I get nowhere near that promised 10x. But in other areas it comes close! Inside my Obsidian vault, I built: * Semantic search * Interactive quizmaster * slide decks to text Watch here: youtu.be/nSh2BYJ29kY #claudecode #obsidian

"PhD-level experts in your back pocket" is a completely nonsensical description of AI but a pretty good description of social media if you follow the right people

AI coding assistants not working for you because your legacy codebase is too big? There's a solution! In this video I share one-click and FREE solutions that give Claude Code a staggering 30x performance boost when working in large codebases. youtu.be/UqfxuQKuMo8 #aiassistedcoding #claudecode

Along the same lines:

Every software engineer needs to be taking a serious look at what AI coding agents will mean for them. In this video we'll go over the essentials: * What to learn * Who to follow * Which tools to pick and why * How to get started youtu.be/xE3EGy_FAnQ #claudecode #vibecoding

Hands on the wheel: live-blogging a claude code programming session This post is an unvarnished look at what it's like to work with an AI assistant in real time. Not a curated demo. Not a sanitized GitHub Copilot ad. This is what actually happened when I paired with Claude code to work on a…

youtu.be/2sLT2gugnIY Lots of developers are treating LLMs like a slot machine. Effective devs need to learn how to stack the odds in their favor. We'll go over some metaphors to help you break away from gambling and towards effective coding leverage. 🎰🧞🤖🐶🖥️ #llms #claudecode #aiassistedprogramming

Hey friends! I did a TEDx talk and it's now up on the TED Conferences YouTube. It's possibly the best and most important talk I've ever done. I would ask that you watch it, and please SHARE it broadly and widely. Thank you! youtu.be/dVG8W-0p6vg #AI #Tech #TED

"Time to take another serious look at LLM's!" I shouted from the rooftops last week. With one big disclaimer: SECURITY 🔐 That's what this week's video is all about: youtu.be/Y34JF4piEBI #llm #claudecode #githubcopilot #n8nio #agenticai #security #aiaugmentedcoding

Wrote up some notes on that recent paper from METR "Measuring the Impact of Early-2025 AI on Experienced Open-Source Developer Productivity" simonwillison.net/2025/Jul/12/...

The Security Risks of LLM Agents "SDXL Cyborg" by xCustomGraphix Whether you're clicking together an agent flow in n8n.io to clean up your emails or vibe-coding your way toward your first MVP, you're potentially exposing yourself to a massive security leak. That helpful chatbot you're integrating…

youtu.be/y9cmmOTUP74 #ai #llm #ai-assisted-coding #claudecode

Currently working on my new workshop called "Leadership in Software Design". The workshop is going to be great: we will talk about leadership and software design. Other topics we will touch are decisions, people and culture.

Software design is a discipline of uncertainty. We took principles and tools from disciplines of certainty into a discipline of uncertainty and we are surprised when hell breaks lose. On our 1ep of Satisfying Software, I spoke to Barry O’Reilly on finding a better way to architect software system.

Why F#? batsov.com/articles/202... #fsharp #dotnet

The slide deck for “Non-Blocking Continuous Code Reviews” at FlowCon France @flowcon.bsky.social #FlowCon How a novice team found ways to improve delivery performance. Key takeaway: Features arrive in production even before a review started. thinkinglabs.io/talks/2024/0...

"We NEED more dev/test/prod environments to develop and test our software more efficiently." Need? You NEED 1 environment. Most large orgs work comfortably with 2-3. Anything more than that smells like throwing money at the wrong problems.

Getting ready for a day of training and hands-on workshopping on trunk-based development. Remember: Friends don't let friends work on long-lived feature branches! 👋 @tdpauw.bsky.social

Sometimes I feel like my job could be a t-shirt. Today's would be: "Decreasing deployment frequency or increasing batch size will not fix your perceived quality problems"

My F# Advent Calendar post about a real-world SaaS product that has been in production for 5 years and whether we would choose F# today: ijrussell.github.io/posts/five-y... #fsharp #FsAdvent #dotnet (thanks @sergeytihon.com for organising)

Visualization of Day 12 (Garden Groups), written in Elm #AdventOfCode einarwh.github.io/aoc/2024/12/...

I do not usually post my #adventofcode solutions, but Day 7 solution is so beautiful in #fsharp ...

I've completed "Guard Gallivant" - Day 6 - Advent of Code 2024 #AdventOfCode youtu.be/9-oMYjL6A6o

I've completed "Ceres Search" - Day 4 - Advent of Code 2024 #AdventOfCode www.youtube.com/watch?v=fiVz... #fsharp #livecoding

I've completed "Mull It Over" - Day 3 - Advent of Code 2024 #AdventOfCode adventofcode.com/2024/day/3 youtu.be/F6gElbX6ugE

This was my tenth(!) year building 25 days of puzzles for #AdventOfCode. You can solve them all for free! Most people write code to solve them, but you can solve them however you like. I hope they help people become better programmers. 🌟 The first puzzle comes out in two hours: adventofcode.com

I've completed "Red-Nosed Reports" - Day 2 - Advent of Code 2024 #AdventOfCode 📺 youtu.be/GGXok82iWWs #fsharp #dotnet #livecoding

❄ It's that time of the year again! ❄ In the next 25 days I'll be solving and recording my solutions to the #adventofcode programming puzzles using the #fsharp #dotnet programming language. Ideal if you're interested in F# or functional programming in general. Come say hi! ☕ youtu.be/wY2g2INDw4g

F# Weekly #48, 2024 - Tomorrow is the first day of #FsAdvent #fsharp sergeytihon.com/2024/11/30/f...

Published a new alpha of #fantomas: www.nuget.org/packages/fan... It contains a change regarding prefix operators: github.com/fsprojects/f... Please try this out #fsharp

I'm always confused that many folks don't recognise that PR workflows and CI are opposite concepts. Continuous Integration is integrating with the main branch repeatedly and frequently - in as small a unit as possible. PRs? Literally defer integration until a change boundary.

New post: Impactful technical training wp.me/p2WOmB-Jz

🎄 I'll be livecoding my #adventofcode in #fsharp solutions again! Day 1 is up on youtube. Part 2 was though 😅 www.youtube.com/watch?v=tVU4... #adventofcode #fsharp #livecoding