TB3 (currently in beta) replaces Scratch's block area with a code editor based on tosh. Because it's a Scratch mod, it still includes many Scratch features that text-based languages typically don't have, such as a costume and sound editor. The syntax is mostly the same as in tosh (see the guide).
Important: opening existing Scratch projects in TB3 isn't supported yet. (But projects made using TB3 can be opened in Scratch.)
Source code can be found in:
- this repo (the interesting parts are in
src/lib/toshandsrc/lib/code-editor) - https://github.com/mxmou/scratch-vm/tree/tb3
- https://github.com/mxmou/scratch-paint/tree/tb3
Bug reports and feature requests can be made in this repo's Issues tab or on the forum topic.