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Sebastiaan Janssen :cultiv2:

@sebastiaan@cultiv.social
mastodon 4.6.4
  • Open on cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all.

But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times?

Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

278 Followers
249 Following
20 Posts
Joined November 21, 2022
📝 Blog:
https://cultiv.nl
🐈‍⬛ GitHub:
https://github.com/nul800sebastiaan
ℹ️ About me:
https://cultiv.dev
✍️ Dev.to:
https://dev.to/cultiv

Posts

Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jul 31, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

The end of an era: after 15+ years, I've switched off our.umbraco.com.

I wrote up some of the story, the karma, the spam wars and a few fond arguments
https://community.umbraco.com/blog/2026/07/an-hour-on-our-one-last-time/

#Umbraco #H5YR Our.

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jul 29, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

Glen Hansard 😢

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Apr 27, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

If you're trying to get up to speed with Umbraco AI then this month's umbraCoffee has you covered!

A great walk through with @matt@umbracocommunity.social on everything that's new and upcoming in Umbraco AI.

📽️ Watch it here: https://www.youtube.com/live/uY9pZz5NHaQ?si=_ZDaegyWNkOyjyBo

#Umbraco

umbracocommunity.social

Matt Brailsford (@matt@umbracocommunity.social) - Umbraco Community Mastodon

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Apr 23, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

🚨 New DevRel Deep Dive dropped earlier this week!

This week @lotte@umbracocommunity.social and me were joined by Head of CMS Andy Butland to talk about what is new and improved in Umbraco version 17.2 and 17.3.

📽️ Watch it here: https://youtu.be/nBEgfifIP0o?si=mKDEc5_ea770dsZW

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Mar 20, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

The Umbraco Spark conference is drawing to a close and it's been a brilliant edition again this year. Great talks, record attendance, impeccable organisation, inspirational hackathon before.. am I using too many superlatives? 😇

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Mar 13, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

It was so interesting to have @matt@umbracocommunity.social join me and @lotte@umbracocommunity.social to show us how all the concepts of Umbraco.AI fit together.

Profiles, temperatures, tokens, prompts, agents, copilots, and more.. there sure was a lot to cover!
👀 Also, we got a sneak preview of the new tests feature and the upcoming TipTap integration.

📽️ The latest DevRel Deep Dive is up now: https://youtu.be/_RUYI1xNzdE?si=tM4NKslxXOy3ps4L

#Umbraco

umbracocommunity.social

Matt Brailsford (@matt@umbracocommunity.social) - Umbraco Community Mastodon

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 25, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

Only 2 (TWO!) more days to vote for Umbraco in the CMS Critic Awards if you haven't done so..!

Nominated in 9 categories (10 if you count uSkinned.. and of course: we DO count uSkinned!)

https://cmscritic.com/vote

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 11, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

A new DevRel Deep Dive just dropped. @lotte@umbracocommunity.social and I are joined by Phil Whittaker, guiding us through some new AI Skills he's been working on that help make backoffice extensions (and review and test them..!).

This video concludes with a working GitHub User Picker for Umbraco. We had a few hiccups but it was a lot of fun to do!

https://www.youtube.com/watch?v=GR-NZra1528

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 10, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @sebastiaan@cultiv.social
@mortenbock@hachyderm.io both of them are in a docker container and I use them in a browser by the way.. so many websites were never worth building but some idiot did it 😉
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 10, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @mortenbock@hachyderm.io
@mortenbock@hachyderm.io I used Inoreader before and it was 90% great but they were never going to fix my 10% annoyances, which really only a handful of people have. I used SIMKL before and it's a total mess, I have the perfect (for me!) feature set, built on their API now, which is none of the features everyone wants, they were never going to tailor it for me. So it is valuable, but only for me, especially the last one, it is making me very happy!
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 10, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @sebastiaan@cultiv.social
@mortenbock@hachyderm.io I guess I could just have an agent running that keeps updating all of them anyway, that would be a fun project. Thanks for giving me more work 😆
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 10, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @mortenbock@hachyderm.io
@mortenbock@hachyderm.io Honestly, what is there to patch, really? Only I can reach them on my internal network, right now what I have can't do real harm so it feels good. I never want to open source them because they work for my brain specifically, so I don't need to support them either.
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 10, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

In the last 9 days I've "written" (sorry: prompted) an RSS reader that does what I need it to do and a TV show/episode tracking tool that works for exactly my needs.

While it feels like the age of Hyperpersonal Software (userbase: 1) has arrived, I do wonder if I will keep enjoying these tools that were made and if I'll keep using them.

On the other hand: it's been great to ask Claude for a new feature and just getting it without being at the whim of someone else (pesky humans haha!).

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Feb 02, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

In last weeks DevRel Deep Dive, @lotte@umbracocommunity.social and I took a look at Blend's new packages for helping with robots.txt and sitemap.xml files.

Since there was a bit of config to set up for the sitemap, I got lazy and asked Claude Code to use the Umbraco MCP server to get my document types and set up the config for me.

👀 Watch here: https://youtu.be/HV5_7VGdLxg

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jan 28, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @leekelleher@mastodon.social
@leekelleher@mastodon.social Just realized it loops too soon, but you were the first one I picked to be on my team, lucky you! 🎉
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jan 28, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

Am enjoying working with Claude and some skills way too much. Wondered if I could make a nice GitHub user picker. 10 minutes later... TADA.
It stores username, name, github id, and bio. The refresh button fetches any name and bio updates.

#Umbraco

Your browser does not support the video tag.
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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jan 15, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

RE: @joe@umbracocommunity.social

Is Joe trying to apply for a job in my team? Looks like it! 😉

#Umbraco #UmbracoSpark

umbracocommunity.social

Joe Glombek: "The lineup for #UmbracoSpark has been announced a…" - Umbraco Community Mastodon

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jan 15, 2026
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

Last week, I noticed 2 new packages had popped up on the Umbraco Marketplace. Both of them can be used to build tables. So we thought we'd do an Umbraco Tables Showdown 💥

Well.. we ended up being just a bit more boring than that - new DevRel Deep Dive episode now up:
📽️ Table Editing Community Packages: https://www.youtube.com/watch?v=CuBm41uczBM

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Jul 25, 2025
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social

🚀 New DevRel Deep Dive just dropped!

@lotte@umbracocommunity.social and me walk through contributing to an open source (!) Umbraco Cloud site, deploying it to live.

We want to establish a great workflow for contributions and encourage you to get involved to make open source Cloud sites great. This is going to be the basis for the new version of https://community.umbraco.com which we'd love to build together with YOU 🤩

▶️ Watch: https://youtu.be/kSSIbSu5m7I

#Umbraco

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Open post
sebastiaan
Sebastiaan Janssen :cultiv2: @sebastiaan@cultiv.social · Apr 03, 2025
Sebastiaan Janssen :cultiv2:
@sebastiaan@cultiv.social

From fostering contributions to learning what makes our developer community tick ☑️, to hosting a weekly open coding session to making coffee ☕ for colleagues. I do it all. But I do need my kayak 🛶 sessions and live music 🎸too. Remember live music, from the before times? Interested in #umbraco (yes, since I do work there), also #dotnet #indiemusic #livemusic #copenhagen #craftbeer #homebrewing #raspberrypi #homeautomation #homeassistant #android - among other things.

cultiv.social
Replying to @MikeMasey@umbracocommunity.social
@MikeMasey@umbracocommunity.social @umbfyi@umbracocommunity.social tip
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