Who placed the item. Drives the ownership chrome (chips / violet vs slate-amber).
OptionalFontFont family key (mapped to token-friendly stacks in CSS); omitted = sans.
OptionalFontCurated font size (see WHITEBOARD_FONT_SIZES); omitted = the CSS default.
OptionalFontFont weight; omitted = the kind's CSS default.
Stable item id (e.g. sticky-3) — referenced by connectors, deltas and agent tools.
OptionalRotationSlight playful tilt, in degrees.
OptionalTintUser-palette tint; ignored for agent stickies (always violet).
OptionalWWidth in px; defaults to WHITEBOARD_DEFAULTS.StickyW when omitted.
Render order (higher renders on top). Assigned by the engine.
A sticky note.