This repository contains the Python implementation of Spacetime, a special relativity scenario editor.
The current desktop beta includes the core relativity model, Java
.sce compatibility, synchronized Highway and Spacetime Diagrams, object and
event editing, programming and lifetime events, decorations, undo/redo,
platform-aware menus and shortcuts, and bundled Help content. Focused tests
cover physics, persistence, editing, and light flashes.
Packaging is partly complete: an unsigned macOS application builds locally and a Windows GitHub Actions workflow is configured. Linux packaging, packaged smoke tests, and signing or notarization remain if distribution requires them.