The notebook
Paper that keeps what you put on it
Le Jaguar is a pupil's notebook on real Séyès ruling — the same paper they already write on, drawn rather than photographed. Clip a passage out of any textbook, annotate it, keep it. Everything stays on the device, and no account is asked for.
The reflected ray is not drawn. It is solved on every movement.
— clipped from Optique géométrique, ch. 2
so the angle out is the angle in, always
How a passage gets there
Select it in the book
Any passage of any textbook in the library. A figure too — the live ones come across still working, not as a screenshot of themselves.
It arrives with its address
The clipping remembers which book and which chapter it came from, so months later it still says where to go back to. A quotation that has lost its source is a rumour.
Write around it
Your own words above and below, on the ruling. The clipping keeps its rule down the side so it stays visibly someone else's.
It stays
In the browser's own storage, on that device. Closing the tab, losing the network, or never signing in changes nothing.
As many as they like, named as they like
One notebook per subject, per term, per teacher, per whim. They are made, renamed, duplicated and thrown away from a shelf that behaves like a shelf — because a pupil who is given exactly one notebook stops using it the week it gets messy.
Those four are an illustration of the shelf, not a reading of yours.
Where the writing lives
The device is the original.
Le Jaguar works whole with no account and no connection, because a pupil whose network drops mid-lesson must keep writing, and a notebook must not vanish because a service changed its mind. Signing in is optional and adds one thing only: a copy that follows the person to another device. The original stays where it was written.
Nothing is sent anywhere
Until someone chooses to sign in, no notebook has left the device it was written on. There is no server of ours in the middle to leave it on.
If two devices both wrote
The most recent wins, notebook by notebook. That is not a line-by-line merge and does not pretend to be: saying so is more honest than implying a magic that does not exist.
Open it
It opens empty, on a fresh sheet, with no sign-up and nothing to dismiss first.