Released on October 14th, 2026.
This version’s documentation.
Syside 1.0 is here: built for enterprise systems engineering at scale. The full release notes are in the blog post: Releasing Syside 1.0: for production at scale. Here is the short version.
One product: Syside
- Syside Editor, Modeler, CLI and Automator are now one product, Syside. It ships as a VS Code extension and as a Python library with a CLI.
- The CLI and the Sysand package manager now install with the Python library.
- The Syside Modeler extension gets no more feature updates and will be discontinued on 2027-01-21.
New diagram engine
- A new in-house visualization engine with full SysML v2 diagram coverage, available in both the extension and the Python library/CLI.
- Two-way sync between diagrams and textual notation, adjustable depth, on-the-fly style switching and custom (including conditional) element colors.
Modeling, views and automation
- New diagnostics and validation rules for more accurate models.
- Table, matrix and diagram views now render even when a model has non-critical errors. Hierarchical tables have been expanded.
- Python APIs load models better and guard against patterns that make scripts slow.
Before you upgrade
1.0 contains breaking changes to models, settings, views, grids and Python scripts. Please follow the Migrate to Syside v1 guide.
Getting Syside 1.0
Syside 1.0 needs a valid license to download. For now it is available to paying users only and isn’t on the VS Code/VSCodium marketplaces or PyPI. Syside 0.x tools are still available on those channels. See plans and pricing.
Questions? Reply below or reach out to us.