Developer, tinkerer, hacker. 🛠️ Early @WooCommerce team, now building @Lapisense. Proud dad. Fluent in sarcasm and gifs.
The Netherlands
Joined December 2010
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Hello world, I'm Coen. Mostly known for working at WooCommerce or my Mozart package. I've been building other people's projects for 20+ years.
I'm fully focussed on @lapisense now. Terrifying and exciting at the same time! Would love to connect to founders on similar paths.
Coen Jacobs retweeted
A tool asked $1600 to migrate 12 years of HelpScout data to Freescout. $400 just for last 3 months.
GPT 5.5 at medium effort nailed it in 5 minutes and less than 10 prompts.
What a time to be alive.
This post is now ~2 weeks old and I've actively been looking into getting more involved with like-minded people in my field of work. It's just silly how some seemingly small changes like this, make me a lot happier.
In a world of tech, it's still about people. The human aspect matters more than ever. This video by @theo unexpectedly hit hard for me today. I feel lonely. Not in the literal sense, but the developers part of my heart feels lonely. 🥺 youtube.com/watch?v=88qc67oY…
Coen Jacobs retweeted
The 2-4 hours you spend scrolling each day (or 730-1460 hours each year) is more than enough time to write a book, build a business, or get in shape. In the moment, it seems like nothing. That's why it's so dangerous. Your time disappears without you being conscious of it.
Coen Jacobs retweeted
finally found the right metaphor for this shift in how i use opencode.
i used to treat it like 3D printing, where you build the thing layer by layer and commit to each piece as you go
now it feels more like progressive rendering, you start with a blurry version of the whole thing, then keep making full passes over it, and each pass sharpens the entire shape
doing this with gpt 5.5 and voice prompting is the first time things feel like they're clicking
Coen Jacobs retweeted
I couldn't help but add our new MCP to another project I've been slowly working on (more on that later)
Coen Jacobs retweeted
What you think will ruin your life usually doesn’t. What you think will complete your life never does.
Just had pizza delivered. 60 minutes late and worse, cold. Obviously, I called and complained. Then, when they delivered new ones, I was expected to return the old ones?! Am I really a prick for flat out refusing to do so (also after having thrown the cold ones out already)?
This is why deterministic code still is very important and agents just add an intelligent layer on top of it, where needed. This is also why I’m a firm believer that Claude Code loops are a significant costs overkill for 99% of what they’re used for currently.
Mozart 1.2.3 is now available, a focused fix release resolving a couple minor annoyances resulting in a very much more stable release: github.com/coenjacobs/mozart…
In a world of tech, it's still about people. The human aspect matters more than ever. This video by @theo unexpectedly hit hard for me today. I feel lonely. Not in the literal sense, but the developers part of my heart feels lonely. 🥺 youtube.com/watch?v=88qc67oY…
Coen Jacobs retweeted
The WordPress community has a visibility-to-competence ratio problem. The loudest voices aren’t always building products of any real substance.
Posting frequency, podcast appearances, and conference stages don’t tell you how big the business actually is.
Some of the most visible people here run companies that aren’t nearly as successful as their personal brand suggests.
Building a real product, not a feature with a landing page, is harder and slower than building an audience. Post count is not a proxy for competence.
Worth keeping in mind when you’re deciding who to learn from.
"to harden a system you need to spend more tokens discovering exploits than attackers will spend exploiting them" dbreunig.com/2026/04/14/cybe…
It’s weird to be building a product around data ownership and then outsourcing your transactional and newsletter email lists. Email at scale is just another beast I’m not willing to tackle myself yet.
Coen Jacobs retweeted
*tap* *tap* Is this thing still on? We're ramping up to release our initial offering into the world really soon. Would love for you to follow along.
We believe to have a unique approach to software licensing and activations, focussed on owning your own (and your customers) data.
Coen Jacobs retweeted
Making something people love is mostly making something you love and hoping the overlap is real
We're all still figuring out this whole AI thing every single day. Tools, models, usage, habits, etc. Some might make it look like they've got the 'perfect setup' figured out already, but I'm coming to the point where I feel like the best setup for everyone is very personal.
The recent changes in both Anthropic and OpenAI subscriptions, are clear proof that the AI model inference subsidisation never really checked out - at least not in the longer term.
Since this month, I've dropped both Anthropic and OpenAI subscriptions and pay by token. Per token is more expensive, yes, but at least I get what I'm paying for and I can use the inference I pay for, for what I want (looking at you, Anthropic đź‘€) - without any restrictions.
Added benefit is that it allows me to experiment with different models from other vendors, for example Kimi K2.5 - which has quickly become my daily driver for smaller tasks. It's almost silly how much cheaper K2.5 is compared to any of the major vendor models and on a daily basis they do not behave _that_ different (for specific tasks, obviously).
Main benefit for me personally, is that I'm not having to deal with the whims of the major subscription vendors anymore. I know exactly what I'm paying for and frankly it has surprised me how often I now use other models than Anthropic/OpenAI ones.
Both Anthropic and OpenAI have created their own problems.
Vague information about what you actually get for your money and, in Antrhopic's case, terrible official comms about changes they make.
Over the last 3 months I've seen people go from praising both companies very highly, to being quite disgusted in what they are getting for their money.
Both companies are great examples of how not to deal with your customers and I'm not sure they can turn this PR around.