Open Source

Scott Henderson noticed core dump files appearing on home directories that were taking up space when a program crashes in one of the hubs we run for the CryoCloud community. While core dump files can be useful in some circumstances, they are almost never useful on a hub.

The Berkeley Institute for Data Science (BIDS) has joined the mybinder.org federation, contributing a new node alongside 2i2c and GESIS. BIDS is the birthplace of mybinder.org, so it’s great to see them back as an active federation member.

The Jupyter Security Working Group recently held a Security Tooling Sprint. It was a timely event given the recent spate of software supply chain attacks across the tech world. The sprint covered two main areas:

We’ve completed a major round of infrastructure upgrades across all 2i2c-managed hubs - every hub is now running Kubernetes 1.34 and Z2JH helm chart 4.3.3. Running up-to-date versions of both Kubernetes and the JupyterHub helm chart ensures that our communities get the best support and reliability, both in terms of features and security.

As part of an initiative to improve jupyterbook.org’s documentation, we refactored the site so that multiple repositories are served under one domain. We wrote up the details on the Jupyter Book blog.

Our collaborators at NASA VEDA recently asked us about the rationale behind policies for upgrading our infrastructure relatively quickly when new versions come out. Here’s the explanation that we shared with them, in case it’s useful for others as well.

TL;DR # nbgitpuller now has improved UX context-aware error handling. Update to version 1.3.0 and let us know what you think by opening an issue or via the feedback form below 🚀

We’re excited to share that Jenny Wong has been invited to join the JupyterHub team as a contributor and maintainer. Jenny’s contributions to nbgitpuller and grafana-dashboards, along with her active participation in project meetings and community planning, earned her this recognition from the JupyterHub community.

Our teammate Angus Hollands gave a talk at FOSDEM 2026: Introducing Jupyter Book 2. The talk shares why the Jupyter Book 2 and MyST stack was rebuilt, and how it supports open, reusable computational publishing workflows.

The MyST/Jupyter Book stack shipped new releases this week. Release pages: mystmd 1.8.0 myst-theme 1.1.0 Jupyter Book 2.1.1 Where we contributed # We’ve spent extra time lately trying to fix bugs and generally improve stability, reliability, and UX papercuts.