Brushes: Select All Unused selects the brushes the document does not use

The reference app's Brushes panel menu has Select All Unused, which
selects the brushes that are not used in the document. VectorCraft's
Brushes panel menu had no such item, and no command listed the unused
brushes.

brush.unused (Select All Unused) is a query that lists, in library
order, the brushes no stroke paints with. Strokes in the art and its
opacity masks, in symbols, graph designs, pattern tiles and graphic
styles count, and so do strokes in the art of a brush that is used.
The art of a brush that is not used does not count, so a brush whose
own art is the only art that paints with it is listed, and so is a
brush used only in the art of an unused brush. The Brushes panel
menu's Select All Unused selects these brushes, and Delete Brush and
Duplicate Brush then act on them.

Docs: docs/mcp.md, docs/target-app-parity.md.

docs/mcp.md

@@ -1223,6 +1223,10 @@ already walks Image Trace. Short agent entry points:
   `symbol.place {name?, x?, y?}`, `symbol.breakLink {ids?}`, `symbol.replace`, `symbol.edit`, `symbol.duplicate`,
   `symbol.selectInstances {name}`. `symbol.new` and `symbol.duplicate {name, newName?}` trim the white space around the
   name they are given, as `symbol.options` trims `newName`; a blank one gives "New Symbol" or "<name> copy".
+- The Brushes panel menu's Select All Unused: `brush.unused` (a query) lists the brushes no stroke paints with, in
+  library order, and the panel selects them. Strokes in the art (opacity masks included), symbols, graph designs,
+  pattern tiles and graphic styles count, and so do the strokes in the art of a brush that is used. The art of a brush
+  that is not used does not count, so a brush whose own art is the only art that paints with it is listed.
 - Brushes: `brush.list`, `brush.get {name}`, `brush.apply {name, ids?}`, `brush.new {type, name?, params?, ids?}`,
   `brush.setCurrent {name}`, `brush.options {name, params?}`, `brush.delete {name} | {names}`,
   `brush.duplicate {name, newName?} | {names}`, `brush.freehand`, `object.expandBrush {ids?}`. `brush.new`,

docs/target-app-parity.md

@@ -689,6 +689,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
   - **Strokes:** one stroke-geometry module shared by the canvas, SVG, PDF and Outline Stroke; dotted lines (zero-length dashes draw dots or squares); arrowheads with hollow outlines, tip-on-end or extend-past-end alignment and one opacity for line and head. SVG and PDF export arrowheads, width profiles, brushes and aligned strokes exactly as the canvas draws them; Outline Stroke and the live Outline Stroke effect outline every stroke item as drawn (dashes, heads, profiles, alignment); dashes can be fitted to corners and path ends; width profiles carry through dashes, and their corners take the join. The Stroke panel edits type's character strokes, follows the stroke units (its weight presets are round values in that unit: `0.25 mm`, `0.0625 in`, `1 px`, #426; fields show four decimals in mm, cm and inches, three in points), shows mixed values blank and opens from the Control bar. A width profile library, thirty more arrowheads, and Width Point Edit with multi-select and discontinuous points. Visual bounds and clicks cover the whole painted stroke. Scale Strokes & Effects, Scale Corners and Use Preview Bounds work everywhere, and new art inherits stroke options, a graphic style or the whole last appearance.
   - **Brushes (part of #852):** double-clicking a brush in the Brushes panel (or the panel menu's Brush Options…) opens Calligraphic Brush Options (Name; Angle, Roundness and Size, each Fixed, Random or Pressure with its Variation; live previews of the nib and of a light–heavy–light stroke) or Bristle Brush Options (Shape and the bristle sliders); OK edits the brush and every stroke painted with it. The Paintbrush records the pen pressure along each stroke (kept with the path, saved, and joined when a stroke continues a path); a Calligraphic value on Pressure goes from value − variation at the lightest pressure to value + variation at the heaviest, on the canvas and in SVG, PDF and the other exports. Brushes saved before keep their look. Scatter Brush Options (Size, Spacing, Scatter and Rotation, each Fixed, Random between two values or Pressure from the first at the lightest pressure to the second at the heaviest; Rotation relative to Page or Path), Art Brush Options (Width, Scale Proportionately, Stretch to Fit Stroke Length or Stretch Between Guides with the guides' start and end, the four Directions, Flip Along and Across) and Pattern Brush Options (Scale, Spacing, the five tiles shown, Flip Along and Across, Stretch to fit, Add space to fit or Approximate path) each have Colorization (None, Tints, Tints and Shades, Hue Shift with its Key Color picked from the art's colours) and a live stroke preview; values from files and commands are clamped to their ranges. Still to come: the Art brush's Overlap, auto-generated Pattern brush corners, new tile art picked in Pattern Brush Options, Stylus Wheel, Tilt, Bearing and Rotation, and pen pressure on macOS.
     In the Brushes panel, Shift-click selects a range of brushes and Ctrl/Cmd-click adds or removes one. Delete Brush and Duplicate Brush then act on all of them (`brush.delete {names}`, `brush.duplicate {names}`).
+    The Brushes panel menu's Select All Unused selects the brushes that are not used in the document, as the [Brushes](https://web.archive.org/web/20241230205225/https://helpx.adobe.com/illustrator/using/brushes.html) page (archived copy) describes. A brush counts as used when a stroke paints with it in the art (opacity masks included), in symbols, graph designs, pattern tiles or graphic styles, or in the art of a used brush (`brush.unused`).
   - **Appearance:** the Appearance panel's selected row drives every paint, stroke, gradient and transparency edit (`item` on the commands); effects apply to one fill or stroke; per-item Opacity popups, whose blend-mode list and opacity slider stay open inside them (#430; the Control bar's Stroke popover too); Mixed Appearances, Layers target dots and basic-appearance rules. Effects can be reordered, moved between items and copied by dragging; Show All Hidden Attributes; clicking an effect edits it in place; the object thumbnail drags onto art; effects render on type, images, symbols, blends, envelopes, meshes and repeats, and per-item raster effects export. Groups, layers and type have their own fills, strokes and effects (Contents and Characters rows); the Layers panel's target circles target layers, groups and objects; Expand Appearance turns fills, strokes, effects and brushes into objects.
     Fill and stroke paint (Fill, Stroke, None, Apply Last Color and Apply Last Gradient, also on characters selected with the Type tool), the Stroke panel's options, gradient and freeform point edits, Swap Fill and Stroke, Default Fill and Stroke, the Eyedropper, and the Appearance panel's item edits, Clear Appearance, Reduce to Basic Appearance, Remove Item, item reordering and Move Appearance record no undo step when they change nothing.
     An image's own fills and strokes draw the shape that a Convert to Shape or Outline Object effect on them gives them (the image's box or its frame, reshaped by the effects after it), under or over the image as its Contents row says, on the canvas, in exports and through Expand Appearance; new fills and strokes on an image go under it. Without one of those effects they draw nothing, and Use Preview Bounds measures an image by its frame.