Dirk Lemstra π§ββοΈ
@dirk.lemstra.org
Open source maintainer of @imagemagick.org and its .NET Standard/Framework library called Magickβ€NET.
Microsoft #MVP | GitHub β
π³π± https://github.com/dlemstra ππΉπΌ
Microsoft #MVP | GitHub β
π³π± https://github.com/dlemstra ππΉπΌ
Reposted by Dirk Lemstra π§ββοΈ
Yesterday was a crazy day, first I received the news that I successfully cleared my Germany A1 exam and after few hours I received the news I AM GITHUB STAR FOR 2026, ONE of the 80+ developers from 180 million developers on GitHub to get this recognition π
February 4, 2026 at 3:42 AM
Yesterday was a crazy day, first I received the news that I successfully cleared my Germany A1 exam and after few hours I received the news I AM GITHUB STAR FOR 2026, ONE of the 80+ developers from 180 million developers on GitHub to get this recognition π
Reposted by Dirk Lemstra π§ββοΈ
here we are again!
feeling proud
feeling proud
February 3, 2026 at 6:12 PM
here we are again!
feeling proud
feeling proud
Reposted by Dirk Lemstra π§ββοΈ
Still canβt quite believe this, but itβs official
Iβve been renewed as a @GitHub.com Star for 2026
Out of 180+ million developers on GitHub, only ~80 people worldwide are part of this program. Being renewed means a lot; itβs a reminder that the work we do in open source, education actually matters
Iβve been renewed as a @GitHub.com Star for 2026
Out of 180+ million developers on GitHub, only ~80 people worldwide are part of this program. Being renewed means a lot; itβs a reminder that the work we do in open source, education actually matters
February 3, 2026 at 6:20 PM
Still canβt quite believe this, but itβs official
Iβve been renewed as a @GitHub.com Star for 2026
Out of 180+ million developers on GitHub, only ~80 people worldwide are part of this program. Being renewed means a lot; itβs a reminder that the work we do in open source, education actually matters
Iβve been renewed as a @GitHub.com Star for 2026
Out of 180+ million developers on GitHub, only ~80 people worldwide are part of this program. Being renewed means a lot; itβs a reminder that the work we do in open source, education actually matters
Reposted by Dirk Lemstra π§ββοΈ
I'm a GitHub Star again in 2026 β
5 years nowπ!
This recognition reflects the awesome communities I work with every day: generous and talented people who share knowledge, build in the open, and support each otherβs growth.
Thanks to @github.com and to the communities I learn from & contribute to.
5 years nowπ!
This recognition reflects the awesome communities I work with every day: generous and talented people who share knowledge, build in the open, and support each otherβs growth.
Thanks to @github.com and to the communities I learn from & contribute to.
February 3, 2026 at 6:21 PM
I'm a GitHub Star again in 2026 β
5 years nowπ!
This recognition reflects the awesome communities I work with every day: generous and talented people who share knowledge, build in the open, and support each otherβs growth.
Thanks to @github.com and to the communities I learn from & contribute to.
5 years nowπ!
This recognition reflects the awesome communities I work with every day: generous and talented people who share knowledge, build in the open, and support each otherβs growth.
Thanks to @github.com and to the communities I learn from & contribute to.
Reposted by Dirk Lemstra π§ββοΈ
Grateful for this recognition and the amazing open source community that makes it all possible. Thank you @github.com for this incredible acknowledgment!
Looking forward to continuing to contribute, share, and build together.
#GitHubStars #OpenSource #DeveloperCommunity
Looking forward to continuing to contribute, share, and build together.
#GitHubStars #OpenSource #DeveloperCommunity
February 3, 2026 at 6:33 PM
Grateful for this recognition and the amazing open source community that makes it all possible. Thank you @github.com for this incredible acknowledgment!
Looking forward to continuing to contribute, share, and build together.
#GitHubStars #OpenSource #DeveloperCommunity
Looking forward to continuing to contribute, share, and build together.
#GitHubStars #OpenSource #DeveloperCommunity
Reposted by Dirk Lemstra π§ββοΈ
Very happy to share that Iβve been renewed as a @github.com Star for the third consecutive year!
Huge thanks to the GitHub team and to everyone in the community whoβs supported and collaborated with me along the way β
#GitHubStar #Community #OpenSource #DevOps #PlatformEngineering #Azure #GitHub
Huge thanks to the GitHub team and to everyone in the community whoβs supported and collaborated with me along the way β
#GitHubStar #Community #OpenSource #DevOps #PlatformEngineering #Azure #GitHub
February 3, 2026 at 6:35 PM
Very happy to share that Iβve been renewed as a @github.com Star for the third consecutive year!
Huge thanks to the GitHub team and to everyone in the community whoβs supported and collaborated with me along the way β
#GitHubStar #Community #OpenSource #DevOps #PlatformEngineering #Azure #GitHub
Huge thanks to the GitHub team and to everyone in the community whoβs supported and collaborated with me along the way β
#GitHubStar #Community #OpenSource #DevOps #PlatformEngineering #Azure #GitHub
I have been renewed as a @github.com Star βπ€©ππ₯π§ββοΈ
www.linkedin.com/posts/dirk-l...
www.linkedin.com/posts/dirk-l...
I have been renewed as a GitHub Star βπ€©ππ₯π§ββοΈ
Really happy that I can be part of this amazing community for another year! | π§ββοΈDirk Lemstra
I have been renewed as a GitHub Star βπ€©ππ₯π§ββοΈ
Really happy that I can be part of this amazing community for another year!
www.linkedin.com
February 3, 2026 at 6:45 PM
I have been renewed as a @github.com Star βπ€©ππ₯π§ββοΈ
www.linkedin.com/posts/dirk-l...
www.linkedin.com/posts/dirk-l...
Always nice to receive these kind of nice posts: github.com/dlemstra/mag...
thank you, magick-wasm is great Β· dlemstra magick-wasm Β· Discussion #259
just wanted to say "thank you" this utility has been great for me over the last year or two since I found it.
github.com
January 30, 2026 at 9:38 PM
Always nice to receive these kind of nice posts: github.com/dlemstra/mag...
Reposted by Dirk Lemstra π§ββοΈ
JPEG XL lijkt eindelijk brede adoptie op het web tegemoet te gaan. Tweakers spreekt grondlegger Jon Sneyers over de superieure techniek en de toekomst. #Tweakers
Achtergrond - Google is om: waarom JPEG XL alsnog de standaard voor het web wordt
JPEG XL lijkt eindelijk brede adoptie op het web tegemoet te gaan. Tweakers spreekt grondlegger Jon Sneyers over de superieure techniek en de toekomst.
tweakers.net
January 20, 2026 at 5:22 AM
JPEG XL lijkt eindelijk brede adoptie op het web tegemoet te gaan. Tweakers spreekt grondlegger Jon Sneyers over de superieure techniek en de toekomst. #Tweakers
Published Magick.NET 14.10.2 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
Release Magick.NET 14.10.2 Β· dlemstra/Magick.NET
Related changes in ImageMagick since the last release of Magick.NET:
Check if the aspect ratio is a known ratio when density_unit is set to zero and otherwise read it as an undefined density in th...
github.com
January 19, 2026 at 9:59 PM
Published Magick.NET 14.10.2 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
Reposted by Dirk Lemstra π§ββοΈ
Looking for examples: do you know any OSS projects that have thoughtfully updated their contribution process for AI-assisted PRs?
Interested in:
* PR templates asking for intent/reasoning
* Comprehension checks
* Other friction-adding methods
Would love to learn from communities experimenting here
Interested in:
* PR templates asking for intent/reasoning
* Comprehension checks
* Other friction-adding methods
Would love to learn from communities experimenting here
January 16, 2026 at 2:48 AM
Looking for examples: do you know any OSS projects that have thoughtfully updated their contribution process for AI-assisted PRs?
Interested in:
* PR templates asking for intent/reasoning
* Comprehension checks
* Other friction-adding methods
Would love to learn from communities experimenting here
Interested in:
* PR templates asking for intent/reasoning
* Comprehension checks
* Other friction-adding methods
Would love to learn from communities experimenting here
Published Magick.NET 14.10.1 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
Release Magick.NET 14.10.1 Β· dlemstra/Magick.NET
Related changes in ImageMagick since the last release of Magick.NET:
Only allow setting the data_precision to values other then 16 and 12 when quality is lossless (>= 100) in the jpeg coder.
Rever...
github.com
December 30, 2025 at 7:59 AM
Published Magick.NET 14.10.1 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
I didn't order mine instantly so now I need to wait till the end of January before I get it... It looks awesome!
December 21, 2025 at 7:49 AM
I didn't order mine instantly so now I need to wait till the end of January before I get it... It looks awesome!
We launched a bug bounty program for @imagemagick.org that is sponsored by the European Commission on YesWeHack: www.linkedin.com/feed/update/...
I can finally share that the European Commission sponsored a bug bounty program for the ImageMagick Studio LLC library! Looking forward to the reports that will make our product more secure ππ§ββοΈ | π§β...
I can finally share that the European Commission sponsored a bug bounty program for the ImageMagick Studio LLC library! Looking forward to the reports that will make our product more secure ππ§ββοΈ
www.linkedin.com
December 20, 2025 at 10:15 AM
We launched a bug bounty program for @imagemagick.org that is sponsored by the European Commission on YesWeHack: www.linkedin.com/feed/update/...
I will probably get an answer that he won't remember π
December 19, 2025 at 3:59 PM
I will probably get an answer that he won't remember π
I really don't understand how past me thinks that future me still knows what that e-mail reminder with just a topic would mean. I hope that future me will remember to add more details in such a reminder...
December 19, 2025 at 9:49 AM
I really don't understand how past me thinks that future me still knows what that e-mail reminder with just a topic would mean. I hope that future me will remember to add more details in such a reminder...
Published Magick.NET 14.10.0 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
Release Magick.NET 14.10.0 Β· dlemstra/Magick.NET
What's Changed
Allow specifying the pdf format in the constructor of the PdfWriteDefines (#1931).
Added HighBitDepth to the JpegWriteDefines.
Related changes in ImageMagick since the last release...
github.com
December 10, 2025 at 4:44 PM
Published Magick.NET 14.10.0 for .NET Standard 2.0 and .NET 8.0: github.com/dlemstra/Mag.... The NuGet packages can be found here: nuget.org/packages?q=M....
Another story: www.linkedin.com/posts/dirk-l.... A story of exploiting PR comment handling in GitHub Actions to achieve command execution, followed by disclosure, remediation, and practical workflow hardening guidance.
Ever thought a harmless pull request comment could execute code in your CI? I disclosed a workflow vulnerability where untrusted PR comments enabled command execution with repo write permissions. In⦠...
Ever thought a harmless pull request comment could execute code in your CI? I disclosed a workflow vulnerability where untrusted PR comments enabled command execution with repo write permissions. In m...
www.linkedin.com
November 22, 2025 at 11:14 AM
Another story: www.linkedin.com/posts/dirk-l.... A story of exploiting PR comment handling in GitHub Actions to achieve command execution, followed by disclosure, remediation, and practical workflow hardening guidance.
Thanking myself for leaving a breaking build so I know where I should start today... I really did not forget what I was doing π€«
November 17, 2025 at 7:58 AM
Thanking myself for leaving a breaking build so I know where I should start today... I really did not forget what I was doing π€«
When you are installing the new @visualstudio.com 2026 and you get stuck in some sign in loop then switch to the "Embedded web browser" instead of the "Windows authentication broker". The 2026 installation did not seem to remember that setting from the 2022 installation.
November 16, 2025 at 8:50 AM
When you are installing the new @visualstudio.com 2026 and you get stuck in some sign in loop then switch to the "Embedded web browser" instead of the "Windows authentication broker". The 2026 installation did not seem to remember that setting from the 2022 installation.
Last week I wrote a short story about how I configured my @imagemagick.org #WASM to use Trusted Publishing: www.linkedin.com/feed/update/...
#wasm | π§ββοΈDirk Lemstra
The magick-wasm npm package now uses Trusted Publisher
Starting with version 0.0.37 of the ImageMagick Studio LLC #WASM package it is now published automatically on GitHub by using the new Trusted Pu...
www.linkedin.com
November 13, 2025 at 3:11 PM
Last week I wrote a short story about how I configured my @imagemagick.org #WASM to use Trusted Publishing: www.linkedin.com/feed/update/...
Reposted by Dirk Lemstra π§ββοΈ
Hack.Commit.Push Switzerland is just one week away! π¨π
This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!
This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!
The next edition of Hack.Commit.Push Switzerlandπ¨πwill take place in Rotkreuz LU this November 22nd. Care to join us for some Open Source hacking? Itβs for a good cause!
switzerland2025.hack-commit-pu.sh
switzerland2025.hack-commit-pu.sh
hack-commit-push Β· One Day to Contribute to Open Source
switzerland2025.hack-commit-pu.sh
November 13, 2025 at 10:31 AM
Hack.Commit.Push Switzerland is just one week away! π¨π
This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!
This is a great opportunity to get involved in Open Source projects like @assertj.github.io, with direct guidance from the maintainers!
Guess I can delay it and switch to macos-15-intel for now.
November 5, 2025 at 4:40 PM
Guess I can delay it and switch to macos-15-intel for now.
Reposted by Dirk Lemstra π§ββοΈ
#AdventOfCode 2025 sponsorship is now open! If your organization might be interested in sponsoring, please have them email sponsorship at [the Advent of Code domain name]. adventofcode.com/2025/sponsors
November 4, 2025 at 3:35 AM
#AdventOfCode 2025 sponsorship is now open! If your organization might be interested in sponsoring, please have them email sponsorship at [the Advent of Code domain name]. adventofcode.com/2025/sponsors