OSS + ELC EU 2026

Digital trust is becoming the foundation of modern agriculture. Join AgStack, OpenAgri, CIAT, industry, and academic leaders to explore how open source digital public infrastructure, AI, interoperable traceability, and open standards are enabling trusted agricultural supply chains. Discover practical approaches to EUDR compliance, food safety, sustainability, and the development of global standards that can accelerate innovation, responsible trade, and collaboration across the agrifood ecosystem.

How to Register: Pre-registration is required. To register for AgStack OSS AI Summit, add it to your Open Source Summit Europe registration.

This mini summit will bring together maintainers, security practitioners, identity experts, and open source community leaders to explore a practical question: how can open source projects know that critical contributors and maintainers are real, trusted participants without creating centralized identity databases or compromising privacy?
The session will focus on the ToIP Decentralized Trust Graph Working Group and its emerging work around verifiable trust communities, verifiable relationship credentials, proof of personhood, and maintainer verification for open source projects. The work is directly relevant to the Linux kernel, where the existing PGP web-of-trust model has provided an important foundation but is difficult to scale across the broader open source ecosystem. The LFDT progress report specifically connects this initiative to the Linux kernel project and the need for privacy-preserving maintainer trust infrastructure following supply-chain threats such as the XZ attack.

How to Register: Pre-registration is required. To register for Decentralized Trust for Open Source Maintainers Mini Summit, add it to your Open Source Summit Europe registration.

Join us for the Jupyter Mini Summit at Open Source Summit Europe, where we’ll bring together contributors, users, and community members to connect, collaborate, and share ideas. This gathering is an opportunity to discuss the future of Project Jupyter, highlight ongoing initiatives, and explore ways to strengthen the ecosystem.

How to Register: Pre-registration is required. To register for Jupyter Mini Summi, add it to your Open Source Summit Europe registration.

Agenda

9:00 - 9:15    
Welcome and the Jupyter Ecosystem
Serena Bonaretti

9:15 - 9:45    
What's new in JupyterLab 4.6 and the tooling behind it: prototype, lint, build, test
Mike Krassowski & Darshan Paudyal

JupyterLab 4.6 was one of the largest minor releases with the new features propagating to Jupyter Notebook 7.6 and JupyterLite 0.8. This session will first highlight a few new features and enhancements, highlighting what those mean for users and extension authors, and then turns to the four Jupyter Foundation-funded projects that enabled the higher than before pace: jupyter-builder, @jupyter/eslint-plugin, revamped UI tests, and plugin playground. The tooling and principles behind it are reusable and might be of interest to audience behind the Jupyter ecosystem.

9:45 - 10:15
JupyterLite's Journey: From Proof of Concept to Massive-Scale Deployments
Jeremy Tuloup

JupyterLite is a Jupyter distribution that runs entirely in the web browser, without any server components. What started five years ago as an experiment officially became part of Project Jupyter this year. This talk takes this milestone as an opportunity to look back at what has been enabled over the past five years, and at what is coming next.

We will go through concrete examples of JupyterLite used in the wild: the try links on jupyter.org, the interactive examples embedded in the NumPy and SymPy documentation, education platforms where entire school systems can start coding in Python and R in seconds without installing anything, offline and locked-down environments where running a server is not an option, and platforms built on top of JupyterLite such as Jupyter Everywhere and notebook.link. Since only static files need to be served, deployments can scale to a large number of users without complex cloud infrastructure, and we will see how this changes the cost and reach of interactive computing. We will also cover the current limitations of the approach.

Finally, we will give an outlook on ongoing and future developments: support for more languages with R, Octave, and C++, a terminal running commands like grep and vim entirely in the browser, and AI features ranging from in-browser assistants to coding agents running directly in the terminal.

10:15 - 10:45    
JupyterHub + Jupyter Book

10:45 - 11:05    
Break

11:05 - 11:35
Scaling Interactive Computing to the Cloud: A Modular, Open Source Approach
Jonathan Guinegagne

Interactive computing tools like Jupyter notebooks and JupyterLab have transformed how people explore data and build ideas. Running Jupyter on your laptop is easy, but what if you need more compute power - including GPU - more storage or to collaborate in real time with others? This talk shows how an open-source, modular approach makes it possible to deploy and manage your interactive applications on the cloud with no prior expertise. We'll explore increasing levels of complexity: from a single user spinning up Jupyter and VS Code on a remote instance to organizations serving hundreds of users — and the lessons learned along the way. Attendees will leave understanding how to make cloud-hosted interactive computing accessible to their users, with Kubernetes as the enabler rather than the obstacle.
Who should attend: Anyone who needs more compute in their interactive computing environments, or who builds for others — students, educators, research teams, and platform engineers.

11:35 - 12:05    
Coordinating Security Across 350+ Jupyter Repositories
Yann Pellegrini

Jupyter has an unusual attack surface among data projects: it runs arbitrary user code by design, with broad access to user resources, and spans 350+ repos across 22 GitHub organizations. This talk shares the challenges encountered at this scale, along with tools and workflows that could apply to other open-source projects.

12:05 - 12:25    
Community Open Mic

Let’s wrap up the Jupyter Mini Summit with a fast-paced, 20-minute open forum! This rapid-fire closing session is your chance to take the floor. We’ll be hosting a quick round of open-mic lightning talks (1-2 minutes each) mixed with an open, community-driven discussion. Have a quick project update, a cool workaround, or a specific challenge you want to float to the room? Bring it to the floor! It’s the perfect high-energy way to make a few final connections, share a quick idea, and wrap up our time together before heading out.


12:25 - 12:30
Closing

OpenSSF Community Day brings together a vibrant community from across the Security and Open Source ecosystems to share ideas and progress on capabilities that make it easier to sustainably secure the development, maintenance, and consumption of the software on which we all depend. These events, held regionally and co-located Open Source Summits, offer an opportunity to engage with the brightest minds in security for a day of collaboration and innovation in software security best practices. As a home for tools, standards, and education, OpenSSF provides attendees the chance to explore these resources, share their experiences, and contribute to a safer and more secure digital world.
To learn more, visit the event website.

For OpenSSF Community Day Europe, we have added conference sessions on Software Supply Chain Offensive Research and Ecosystem Defense (SCORED), in cooperation with ACM. These sessions feature original research and security-in-practice talks focused on software supply chain security from both technical and policy perspectives.

How to Register: Pre-registration is required. Register for OpenSSF Community Day Europe as a stand alone event or add it to your Open Source Summit Europe registration. 20 Euro (only in-person reg).

Calling all Valkey contributors, maintainers, product leaders, and community builders! Join us for the annual Valkey Contributor Summit: a community-led forum of builders who actively shape the direction of this fast-growing open source project. Together, we’ll share ideas, discuss priorities, and plan the future of Valkey.
To learn more, visit the event website.
How to Register: Pre-registration is required. Register for Valkey Contributor Summit as a stand alone event.

The Linux Foundation Member European Forum is an annual regional gathering for Linux Foundation European members interested in discussing and shaping how European organisations participate in the global technology commons.

How to Register: Participation is by invitation only. If you are interested in attending, please submit a request for an invitation. All requests will be reviewed, and you will receive an email notification once a decision has been made.

Join us to learn how the CIP community establishes an open source base layer of industrial grade software to enable the use and implementation of software building blocks for civil infrastructure - like transportation, energy, and industry.

How to Register: Pre-registration is required. To register for Civil Infrastructure Platform Mini Summit, add it to your Open Source Summit Europe registration.

The Real-Time Linux User Forum connects developers and users building products or solutions with PREEMPT_RT. This event focuses on sharing user stories and practical experiences, fostering collaboration to address real-world challenges and explore advancements in Real-Time Linux.

To learn more about the sessions and speakers, please visit the event website.

How to Register: Pre-registration is required. To register for Real-Time Linux User Forum, add it to your Open Source Summit Europe registration.

Agenda
1:30-2:00 PM: PREEMPT_RT configuration: Best practices with kconfig_checker (Speaker: Ahmed S. Darwish, Linutronix GmbH)
2:00-2:30 PM: cpusets and other recent updates in tuna and rteval (Speaker: John Kacur, Red Hat)
2:30-3:00 PM: Let the Kernel Monitor Your Real-Time Application (Speaker: John Ogness, Linutronix GmbH)
3:00-3:30 PM Break
3:30-4:00 PM: Finding sources of Latency via Tracing (Speaker: Steven Rostedt, Qube-RT)
4:00-4:30 PM: Beyond Cyclictest: Deploying PREEMPT_RT in Mixed-Criticality Industrial Systems (Speaker: Jitendra sharma, Qualcomm India Private Limited)
4:30-5:00 PM: Where PREEMPT_RT meets the dynamics of container runtimes (Speaker: Florian Bezdeka, Siemens)