A folder, not a database
A space is a folder on your disk. Create one, or open a folder you already have, including a docs folder inside a repo.
Its own tint
Every space has a colour, and the whole app quietly changes to it when you switch, so you always know where you are.
Jump between them
⌘1 to ⌘9 goes straight to a space, and ⌃Tab cycles through them. Search, pins, todos and tags stay inside the space you are in.
Move a note across
Moving a note to another space moves its file: same note, same identity, new folder. Links within a space repoint themselves on a rename.
More of Margin
A space is a folder you choose, and every note is one Markdown file inside it. Margin is a fast view over that folder, nothing more.
You type Markdown and it renders as you go. No preview pane, no second copy, no toolbar. The markers step aside when the cursor leaves them.
Links between notes point at the note, not the filename, so reorganising at eleven at night does not break a single one.
Every parent is itself a note, with its own words, not a bare folder. The tree underneath is plain files and folders that read fine anywhere else.
Paste a link to a pull request or an issue and it shows its state, its checks and where the review stands, right in the note.
It does nothing on its own: no indexing, no reading as you type. Only what you point it at goes to the model you picked, and only when you ask.