Here you can compile a schematics definition written in Schemacode, a schema definition language, into a text representation to be pasted into Mindustry using the Import schematics... button. If your schematics contain processors, you can specify code for the processor using either Mindustry Logic or Mindcode. You can also decompile an existing schematics using the Decompiler and modify the resulting code.
Bug reports, suggestions and questions are welcome at the project page.