ns-ui / galley-bracket — presence marked at the edges, not painted across the middle
Remote collaborators' selections should read like a proofreader's marks in the margin, not a wash of overlapping color. When two people select the same passage at once, the marks nest outward in the order each person arrived, so the story of who is where stays legible even as more collaborators join the paragraph.
Active selections
Each collaborator's range is marked only at its ends and a hairline beneath — overlapping ranges nest outward by arrival order instead of blending into a tinted wash. Press a name below the paragraph to jump the platform selection to that range.