WT.2 Wall tool, Draw: rectangle, rotated rectangle, polygon, arc by centre, tangent arc, pick one line, trace outline

Wall tool spec pages 4-8 (Duncan, 2026-11-05), tracked at /roadmap-internal 'BimCraft wall tool specification'. Icons: the DU.1 family (assets/js/app-workspace-icons.js: 32 grid, 1.5 round stroke, two-tone fills, Full Color or Outline). Not built (page 5): Rectangle (four walls, four corner joins, one action), Rotated rectangle, Polygon (inscribed / circumscribed), Arc by centre (centre, radius, sweep), Tangent arc (continues from the last segment), Pick lines (one line or edge at a time; Tab picks the chain; today only a whole DWG / DXF / PDF scan), Trace outline (click inside a closed area; today only 'Develop this mass'). Each is a recipe on the Place block (addWall, Wall tool, model-trace.js) ending in the join solver (FX.60); the Shape list on the Wall button holds the shapes. Icons: wallrect, wallrectrot, wallpoly, wallarcc, walltan, wallpick, walltrace. OTHER APPS: CadCraft already has rectangle and polygon as drawing tools but not as walls with joined corners: its plan walls (FX.59) should get the same recipes from one shared place. Not started.

walls-09 2026-11-06 (done): Built in /lab: Wall › Shape list and the new Shapes menu (DU.1 icons wallrect, wallrectrot, wallpoly, wallarcc, walltan, wallpick, walltrace; commands wall.rect ... wall.trace): rectangle (four walls, four L joins, one undo step), rotated rectangle, polygon inscribed / circumscribed (3-64 sides), ar... see docs/0.9-sessions/walls-09.md.

walls-plan-09 2026-11-06 (done): CadCraft plan walls: rectangle, rotated rectangle, polygon, arc (as 15 degree chords: plan walls are straight), tangent arc, pick lines, trace outline as WALLRECT, WALLROT, WALLPOLY, WALLARC, WALLTAN, WALLPICK, WALLTRACE, same gestures as RECTANG and POLYGON, one undo step each, corners joined. One ... see docs/0.9-sessions/walls-plan-09.md.