Jo Van Eyck
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jovaneyck.bsky.social
Jo Van Eyck
@jovaneyck.bsky.social
190 followers 170 following 40 posts
I help software orgs get things done without shooting themselves in the foot. Technical coach, software crafter, legacy code wrestler.

Also, boardgames 🎲
Posts Replies Media Videos
Reposted by Jo Van Eyck
sch3lp.bsky.social
That’s a wrap for day one of #SocratesBE
Here’s a FOMO inducing photo of today’s marketplace.
What you don’t see is Vincent’s legendary lightning talk on Limburgse Vlaai. That happened Thursday evening already.
October 10, 2025 at 10:38 PM
Reposted by Jo Van Eyck
dsyme.bsky.social
F# folk - I've started a PR to add F# support to the Serena MCP server, that effectively allows the use of the F# language server from coding agents.

github.com/oraios/seren...

Please be welcome to contribute to get this over the line.

cc @chethusk.bsky.social

Thanks
Don
Add F# support using FsAutoComplete LSP by dsyme · Pull Request #662 · oraios/serena
This adds F# support by the usual path, using the standard F# LSP Using Serena with F# Projects This guide demonstrates how to use Serena's tools with F# projects through both the MCP protocol...
github.com
October 10, 2025 at 11:11 AM
Reposted by Jo Van Eyck
simonwillison.net
I've become one of those people who run multiple coding agents at once - here are my notes on embracing the parallel coding agent lifestyle simonwillison.net/2025/Oct/5/p...
Embracing the parallel coding agent lifestyle
For a while now I’ve been hearing from engineers who run multiple coding agents at once—firing up several Claude Code or Codex CLI instances at the same time, sometimes in …
simonwillison.net
October 5, 2025 at 1:56 PM
Reposted by Jo Van Eyck
gergely.pragmaticengineer.com
AI agents being able to run unit tests is SUCH a massive unlock.

If you're a dev who has utilized unit tests heavily: using a tool like Claude Code makes so much sense.

And if you don't yet use tests: with AI agents, don't see how you would not do it sooner or later...
September 30, 2025 at 9:58 PM
Reposted by Jo Van Eyck
simonwillison.net
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 think “agent” may finally have a widely enough agreed upon definition to be useful jargon now
I’ve noticed something interesting over the past few weeks: I’ve started using the term “agent” in conversations where I don’t feel the need to then define it, roll my eyes …
simonwillison.net
September 18, 2025 at 7:15 PM
Reposted by Jo Van Eyck
robbowley.net
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/...
The lethal trifecta for AI agents: private data, untrusted content, and external communication
If you are a user of LLM systems that use tools (you can call them “AI agents” if you like) it is critically important that you understand the risk of …
simonwillison.net
September 8, 2025 at 8:29 AM
jovaneyck.bsky.social
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
I Built an AI Coding Agent in 200 Lines of Code.
YouTube video by Jo Van Eyck
youtu.be
August 31, 2025 at 5:20 PM
jovaneyck.bsky.social
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
Can AI coding agents do Test-Driven Development (TDD)?
YouTube video by Jo Van Eyck
youtu.be
August 24, 2025 at 12:06 PM
Reposted by Jo Van Eyck
thegoodparts.dev
LLMs and coding agents are a security nightmare

garymarcus.substack.com/p/llms-codin...

#ai #genai #llm #programming
LLMs + Coding Agents = Security Nightmare
Things are about to get wild
garymarcus.substack.com
August 18, 2025 at 2:28 PM
jovaneyck.bsky.social
AI coding assistants promise 10x productivity gains. The research tells a different story.

Full breakdown here: youtu.be/MLSs8Asmthk

#aiassistedcoding #claudecode #githubcopilot #dora
Busting the AI coding productivity myth
YouTube video by Jo Van Eyck
youtu.be
August 17, 2025 at 7:18 PM
Reposted by Jo Van Eyck
notnotamber.bsky.social
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
August 15, 2025 at 9:10 PM
Reposted by Jo Van Eyck
mathiasverraes.bsky.social
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 🤣
A selfie with a a gentleman I met at a conference in Denver CO, who made a t-shirt with my distsys joke printed on it.
August 15, 2025 at 2:50 PM
jovaneyck.bsky.social
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
This combo makes smart note systems magical.
YouTube video by Jo Van Eyck
youtu.be
August 10, 2025 at 9:59 PM
Reposted by Jo Van Eyck
astrokatie.com
"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
August 9, 2025 at 11:07 PM
jovaneyck.bsky.social
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
AI coding agents are useless on large codebases. Unless you do THIS.
YouTube video by Jo Van Eyck
youtu.be
August 2, 2025 at 3:14 PM
Reposted by Jo Van Eyck
fullmoon.id
Along the same lines:
Comic strip: Coworker A (drinking coffee): "Some day we won't even need coders any more. We'll be able to just write the specification and the program will write itself" Coworker B (coding at a laptop): Oh wow, you're right! We'll be able to write a comprehensive and precise spec and bam, we won't need programmers any more! And do you know the industry term for a project specification that is comprehensive and precise enough to generate a program? Coworker A: Uh… no… Coworker B: Code. It's called code
July 21, 2025 at 2:58 PM
jovaneyck.bsky.social
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
Getting started with AI coding agents
YouTube video by Jo Van Eyck
youtu.be
July 26, 2025 at 7:20 PM
jovaneyck.bsky.social
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…
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 non-trivial. I wanted to explore this area a bit further; because "hammering out another CRUD endpoint" is something I've seen Claude do quite successfully. I wanted to push things a bit further. And yes; I kept my hands somewhere near the steering wheel the entire time.
jvaneyck.wordpress.com
July 24, 2025 at 11:42 AM
jovaneyck.bsky.social
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
Dear devs, please Stop using AI like a slot machine
YouTube video by Jo Van Eyck
youtu.be
July 21, 2025 at 8:21 AM
Reposted by Jo Van Eyck
scott.hanselman.com
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
Tech Promised Everything. Did it deliver? | Scott Hanselman | TEDxPortland
YouTube video by TEDx Talks
youtu.be
July 17, 2025 at 5:37 PM
jovaneyck.bsky.social
"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
Don't get hacked! (LLM security)
YouTube video by Jo Van Eyck
youtu.be
July 13, 2025 at 5:04 PM
Reposted by Jo Van Eyck
simonwillison.net
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/...
Measuring the Impact of Early-2025 AI on Experienced Open-Source Developer Productivity
METR - for Model Evaluation & Threat Research - are a non-profit research institute founded by Beth Barnes, a former alignment researcher at OpenAI (see Wikipedia). They've previously contributed ...
simonwillison.net
July 12, 2025 at 6:14 PM
jovaneyck.bsky.social
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…
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 into your product? Might not be as harmless as you think. Even using LLMs to improve your productivity as a software engineer could open your whole organization up to significant security risks.
jvaneyck.wordpress.com
July 7, 2025 at 5:37 AM
jovaneyck.bsky.social
youtu.be/y9cmmOTUP74

#ai #llm #ai-assisted-coding #claudecode
We need to talk about AI-assisted programming
YouTube video by Jo Van Eyck
youtu.be
July 7, 2025 at 4:57 AM
Reposted by Jo Van Eyck
gienverschatse.com
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.
May 7, 2025 at 11:07 AM