Plugins

UML sequence diagrams as editable .drawio files from a JSON spec: Python places participants, fragments and labels, the draw.io desktop CLI renders a PNG at 1x-4x, and Pillow verifies the output size. Generation is deterministic and refuses to overwrite a file edited by hand. Needs Python with Pillow 12.x and the draw.io desktop app; the default paths are Windows ones (Python under C:\Program Files\Python314, draw.io under D:\drawio) and can be changed in the settings card.