Model pseudo-annotation

Repair the model's grid lines

1. Open a fabric. Drag its files anywhere onto this page: the picture, and its *_fragments.json if there is one. The picture on its own is fine — you then draw the whole grid yourself. Nothing is uploaded; the files never leave your computer.
2. Fix the lines. The model finds ridge pieces and gets most of them right. Your job is the broken ones: join pieces that belong to one thread, extend a line that stops short, delete one that is not really there, drag one that sits off the yarn. Drawing only ever adds — nothing you have is overwritten by a stroke.
3. Save. A file called model_pseudo_edit.json downloads to your machine. Send that one file back — keep the name, and say which fabric it belongs to.

Two people can work at the same time on different fabrics; there is no shared server, so nothing can clash. Save whenever you like — each save downloads the whole result, not a change since last time.