{
  "_comment": [
    "Source of truth for the object-driven tool offer (see docs/cad_ux_guidelines.md 4.1).",
    "Every verb, the selections it accepts, the document state it needs, and its fixed",
    "compass address. Extracted from the code, not from memory:",
    "  verbs + shortcuts + refusal messages -> src/slic3r/GUI/DesignPanel.cpp (feat_dropdown",
    "    call sites at 524/662/734/790/874/904, sk_key table at 369-400, m_keys_feature)",
    "  kernel coverage            -> src/libslic3r/CadDocument.hpp  (enum CadFeatureType)",
    "  headless coverage          -> src/slic3r/GUI/McpControl.cpp  (method == \"...\")",
    "  selection kinds            -> src/slic3r/GUI/DesignCanvas.hpp (the on_*_selected callbacks)",
    "gen_offer_mockups.py reads this file; the eventual C++ offer table is generated from it",
    "too, so the map exists once."
  ],
  "slots": [
    {
      "id": "create",
      "pos": "N",
      "angle": 270,
      "label": "Create",
      "why": "makes new geometry from nothing you have yet"
    },
    {
      "id": "add",
      "pos": "NE",
      "angle": 315,
      "label": "Add material",
      "why": "grows solid or sheet material"
    },
    {
      "id": "remove",
      "pos": "E",
      "angle": 0,
      "label": "Remove",
      "why": "takes material away"
    },
    {
      "id": "dressup",
      "pos": "SE",
      "angle": 45,
      "label": "Dress-up",
      "why": "finishes faces and edges without changing the shape's intent"
    },
    {
      "id": "repeat",
      "pos": "S",
      "angle": 90,
      "label": "Repeat",
      "why": "copies what exists"
    },
    {
      "id": "transform",
      "pos": "SW",
      "angle": 135,
      "label": "Transform",
      "why": "moves without changing shape"
    },
    {
      "id": "reference",
      "pos": "W",
      "angle": 180,
      "label": "Reference",
      "why": "makes datums, curves and measurements"
    },
    {
      "id": "modify",
      "pos": "NW",
      "angle": 225,
      "label": "Modify",
      "why": "edits or removes what is already there"
    }
  ],
  "selections": [
    {
      "id": "none",
      "name": "Nothing selected",
      "mode": "model",
      "shape": "empty"
    },
    {
      "id": "face_planar",
      "name": "Planar face",
      "mode": "model",
      "shape": "box_top"
    },
    {
      "id": "face_cyl",
      "name": "Cylindrical face",
      "mode": "model",
      "shape": "box_bore"
    },
    {
      "id": "face_other",
      "name": "Curved face",
      "mode": "model",
      "shape": "box_fillet_face"
    },
    {
      "id": "edge_str",
      "name": "Straight edge",
      "mode": "model",
      "shape": "box_edge"
    },
    {
      "id": "edge_circ",
      "name": "Circular edge",
      "mode": "model",
      "shape": "box_bore_rim"
    },
    {
      "id": "vertex",
      "name": "Vertex",
      "mode": "model",
      "shape": "box_vertex"
    },
    {
      "id": "body_solid",
      "name": "Solid body",
      "mode": "model",
      "shape": "box_whole"
    },
    {
      "id": "body_sheet",
      "name": "Sheet body",
      "mode": "model",
      "shape": "sheet"
    },
    {
      "id": "bodies_2",
      "name": "Two bodies",
      "mode": "model",
      "shape": "two_boxes"
    },
    {
      "id": "datum_plane",
      "name": "Datum plane",
      "mode": "model",
      "shape": "datum"
    },
    {
      "id": "datum_axis",
      "name": "Datum axis",
      "mode": "model",
      "shape": "axis"
    },
    {
      "id": "coordsys",
      "name": "Coordinate system",
      "mode": "model",
      "shape": "csys"
    },
    {
      "id": "art",
      "name": "Text / imported art",
      "mode": "model",
      "shape": "art"
    },
    {
      "id": "sk_loop",
      "name": "Closed sketch loop",
      "mode": "model",
      "shape": "loop"
    },
    {
      "id": "sk_none",
      "name": "Sketch, nothing picked",
      "mode": "sketch",
      "shape": "sk_empty"
    },
    {
      "id": "sk_line",
      "name": "Sketch line",
      "mode": "sketch",
      "shape": "sk_line"
    },
    {
      "id": "sk_arc",
      "name": "Sketch arc or circle",
      "mode": "sketch",
      "shape": "sk_arc"
    },
    {
      "id": "sk_point",
      "name": "Sketch point",
      "mode": "sketch",
      "shape": "sk_point"
    },
    {
      "id": "sk_2ent",
      "name": "Two sketch entities",
      "mode": "sketch",
      "shape": "sk_two"
    }
  ],
  "doc_states": [
    {
      "id": "rich",
      "name": "Working document",
      "bodies": 2,
      "sketches": 2,
      "sheet": true,
      "note": "two solids, two sketches, one sheet body — everything doc-gated is legal"
    },
    {
      "id": "fresh",
      "name": "Fresh document",
      "bodies": 0,
      "sketches": 0,
      "sheet": false,
      "note": "nothing built yet — shows how much of the ring is empty on first open"
    }
  ],
  "verbs": [
    {
      "id": "sketch",
      "name": "Sketch",
      "slot": "create",
      "key": "Shift+S",
      "feature": "Sketch",
      "mcp": null,
      "accepts": [
        "face_planar",
        "datum_plane",
        "none"
      ],
      "needs": {},
      "refusal": "Click a face or a reference plane in the viewport, then a sketch tool",
      "gui": true,
      "action": "key:S+S"
    },
    {
      "id": "extrude",
      "name": "Extrude",
      "slot": "add",
      "key": "Shift+E",
      "feature": "Extrude",
      "mcp": "extrude",
      "accepts": [
        "sk_loop",
        "face_planar"
      ],
      "needs": {},
      "refusal": "Create a sketch, or pick a solid face, first",
      "gui": true,
      "action": "key:S+E"
    },
    {
      "id": "revolve",
      "name": "Revolve",
      "slot": "add",
      "key": "Shift+R",
      "feature": "Revolve",
      "mcp": "revolve",
      "accepts": [
        "sk_loop"
      ],
      "needs": {},
      "refusal": "Create a sketch profile to revolve first",
      "gui": true,
      "action": "key:S+R"
    },
    {
      "id": "sweep",
      "name": "Sweep",
      "slot": "add",
      "key": "Shift+W",
      "feature": "Sweep",
      "mcp": null,
      "accepts": [
        "sk_loop"
      ],
      "needs": {
        "sketches": 2
      },
      "refusal": "Create a profile sketch to sweep first",
      "gui": true,
      "action": "key:S+W"
    },
    {
      "id": "loft",
      "name": "Loft",
      "slot": "add",
      "key": "Shift+L",
      "feature": "Loft",
      "mcp": null,
      "accepts": [
        "sk_loop"
      ],
      "needs": {
        "sketches": 2
      },
      "refusal": "Create at least two profile sketches to loft",
      "gui": true,
      "action": "key:S+L"
    },
    {
      "id": "thicken",
      "name": "Thicken",
      "slot": "add",
      "key": null,
      "feature": "Thicken",
      "mcp": "thicken",
      "accepts": [
        "face_planar",
        "face_other"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Thicken needs a solid body — add or import one first",
      "gui": true,
      "action": "fly:material#4"
    },
    {
      "id": "rib",
      "name": "Rib",
      "slot": "add",
      "key": null,
      "feature": "Rib",
      "mcp": "rib",
      "accepts": [
        "sk_line"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Rib needs a solid body — add or import one first",
      "gui": true,
      "action": "fly:material#5"
    },
    {
      "id": "boolean",
      "name": "Combine",
      "slot": "add",
      "key": "Shift+B",
      "feature": "Boolean",
      "mcp": "boolean",
      "accepts": [
        "bodies_2"
      ],
      "needs": {
        "bodies": 2
      },
      "refusal": "Boolean needs two bodies — create or import a second solid",
      "gui": true,
      "action": "key:S+B"
    },
    {
      "id": "surf_extrude",
      "name": "Surface Extrude",
      "slot": "add",
      "key": "Shift+G",
      "feature": "SurfaceExtrude",
      "mcp": "surface_extrude",
      "accepts": [
        "sk_loop"
      ],
      "needs": {},
      "refusal": "Create a sketch first",
      "gui": true,
      "action": "key:S+G"
    },
    {
      "id": "surf_revolve",
      "name": "Surface Revolve",
      "slot": "add",
      "key": null,
      "feature": "SurfaceRevolve",
      "mcp": "surface_revolve",
      "accepts": [
        "sk_loop"
      ],
      "needs": {},
      "refusal": "Create a sketch profile to revolve first",
      "gui": true,
      "action": "fly:surface#1"
    },
    {
      "id": "surf_loft",
      "name": "Surface Loft",
      "slot": "add",
      "key": null,
      "feature": "SurfaceLoft",
      "mcp": "surface_loft",
      "accepts": [
        "sk_loop"
      ],
      "needs": {
        "sketches": 2
      },
      "refusal": "Create at least two profile sketches to loft",
      "gui": true,
      "action": "fly:surface#2"
    },
    {
      "id": "surf_fill",
      "name": "Surface Fill",
      "slot": "add",
      "key": null,
      "feature": "SurfaceFill",
      "mcp": "surface_fill",
      "accepts": [
        "sk_loop"
      ],
      "needs": {},
      "refusal": "Create a closed sketch first",
      "gui": true,
      "action": "fly:surface#3"
    },
    {
      "id": "thicken_surf",
      "name": "Thicken Surface",
      "slot": "add",
      "key": null,
      "feature": "ThickenSurface",
      "mcp": "thicken_surface",
      "accepts": [
        "body_sheet"
      ],
      "needs": {
        "sheet": true
      },
      "refusal": "target is not a sheet body",
      "gui": true,
      "action": "fly:surface#5"
    },
    {
      "id": "hole",
      "name": "Hole",
      "slot": "remove",
      "key": "Shift+H",
      "feature": "Hole",
      "mcp": "hole",
      "accepts": [
        "face_planar",
        "datum_plane"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pick a face or a plane to drill into",
      "gui": true,
      "action": "key:S+H"
    },
    {
      "id": "thread",
      "name": "Thread",
      "slot": "remove",
      "key": "Shift+T",
      "feature": "Thread",
      "mcp": null,
      "accepts": [
        "face_cyl",
        "edge_circ"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pick a cylindrical surface (bore / outer) or a circular edge for a thread",
      "gui": true,
      "action": "key:S+T"
    },
    {
      "id": "shell",
      "name": "Shell",
      "slot": "remove",
      "key": "Shift+K",
      "feature": "Shell",
      "mcp": "shell",
      "accepts": [
        "face_planar",
        "body_solid"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Shell needs a solid body",
      "gui": true,
      "action": "key:S+K"
    },
    {
      "id": "cut",
      "name": "Cut",
      "slot": "remove",
      "key": "Shift+X",
      "feature": "Cut",
      "mcp": null,
      "accepts": [
        "body_solid",
        "datum_plane"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Create a solid body to cut first",
      "gui": true,
      "action": "key:S+X"
    },
    {
      "id": "split",
      "name": "Split",
      "slot": "remove",
      "key": null,
      "feature": "Cut",
      "mcp": "split",
      "accepts": [
        "body_solid"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Split needs a solid body",
      "gui": false,
      "action": null
    },
    {
      "id": "fillet",
      "name": "Fillet",
      "slot": "dressup",
      "key": "Shift+F",
      "feature": "Fillet",
      "mcp": "fillet",
      "accepts": [
        "edge_str",
        "edge_circ",
        "face_planar",
        "body_solid"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pick an edge to round",
      "gui": true,
      "action": "key:S+F"
    },
    {
      "id": "chamfer",
      "name": "Chamfer",
      "slot": "dressup",
      "key": null,
      "feature": "Chamfer",
      "mcp": "chamfer",
      "accepts": [
        "edge_str",
        "edge_circ",
        "face_planar",
        "body_solid"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pick an edge to bevel",
      "gui": true,
      "action": "key:S+F"
    },
    {
      "id": "draft",
      "name": "Draft",
      "slot": "dressup",
      "key": "Shift+D",
      "feature": "Draft",
      "mcp": "draft",
      "accepts": [
        "face_planar",
        "face_other"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pick a face to taper",
      "gui": true,
      "action": "key:S+D"
    },
    {
      "id": "surf_offset",
      "name": "Surface Offset",
      "slot": "dressup",
      "key": null,
      "feature": "SurfaceOffset",
      "mcp": "surface_offset",
      "accepts": [
        "body_sheet"
      ],
      "needs": {
        "sheet": true
      },
      "refusal": "target is not a sheet body",
      "gui": true,
      "action": "fly:surface#4"
    },
    {
      "id": "pattern",
      "name": "Pattern",
      "slot": "repeat",
      "key": "Shift+N",
      "feature": "Pattern",
      "mcp": "pattern",
      "accepts": [
        "body_solid",
        "face_planar",
        "sk_loop",
        "art"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Create a solid body to pattern first",
      "gui": true,
      "action": "key:S+N"
    },
    {
      "id": "mirror",
      "name": "Mirror",
      "slot": "repeat",
      "key": "Shift+Z",
      "feature": "Mirror",
      "mcp": "mirror",
      "accepts": [
        "body_solid",
        "datum_plane"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Mirror needs a body — add or import one first",
      "gui": true,
      "action": "key:S+Z"
    },
    {
      "id": "pat_curve",
      "name": "Pattern on Curve",
      "slot": "repeat",
      "key": null,
      "feature": "Pattern",
      "mcp": "pattern_on_curve",
      "accepts": [
        "body_solid",
        "edge_str"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Pattern on curve needs a body and a curve",
      "gui": false,
      "action": null
    },
    {
      "id": "transform",
      "name": "Move",
      "slot": "transform",
      "key": "Shift+Y",
      "feature": "Transform",
      "mcp": "transform",
      "accepts": [
        "body_solid",
        "body_sheet",
        "art"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Transform needs a body — add or import one first",
      "gui": true,
      "action": "key:S+Y"
    },
    {
      "id": "mate",
      "name": "Mate",
      "slot": "transform",
      "key": null,
      "feature": "Mate",
      "mcp": "mate",
      "accepts": [
        "coordsys",
        "bodies_2",
        "face_planar"
      ],
      "needs": {
        "bodies": 2
      },
      "refusal": "A mate needs two coordinate systems",
      "gui": true,
      "action": "fly:placement#2"
    },
    {
      "id": "align",
      "name": "Align to",
      "slot": "transform",
      "key": null,
      "feature": "Transform",
      "mcp": "transform",
      "accepts": [
        "face_planar"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Align needs a body",
      "gui": false,
      "action": null
    },
    {
      "id": "plane",
      "name": "Plane",
      "slot": "reference",
      "key": "Shift+P",
      "feature": "Plane",
      "mcp": null,
      "accepts": [
        "none",
        "face_planar",
        "edge_str",
        "datum_plane",
        "vertex"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:S+P"
    },
    {
      "id": "axis",
      "name": "Axis",
      "slot": "reference",
      "key": "Shift+A",
      "feature": "Axis",
      "mcp": "axis",
      "accepts": [
        "none",
        "face_planar",
        "face_cyl",
        "edge_str",
        "vertex"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:S+A"
    },
    {
      "id": "coordsys_v",
      "name": "Coord Sys",
      "slot": "reference",
      "key": "Shift+C",
      "feature": "CoordSys",
      "mcp": "coordsys",
      "accepts": [
        "none",
        "face_planar",
        "vertex"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:S+C"
    },
    {
      "id": "helix",
      "name": "Helix",
      "slot": "reference",
      "key": null,
      "feature": "Helix",
      "mcp": "helix",
      "accepts": [
        "none",
        "datum_plane",
        "face_cyl"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "fly:plane#3"
    },
    {
      "id": "project",
      "name": "Project",
      "slot": "reference",
      "key": null,
      "feature": "Project",
      "mcp": "project",
      "accepts": [
        "body_solid",
        "face_planar",
        "datum_plane"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Project needs a body — add or import one first",
      "gui": true,
      "action": "fly:plane#4"
    },
    {
      "id": "measure",
      "name": "Measure",
      "slot": "reference",
      "key": null,
      "feature": null,
      "mcp": "measure",
      "accepts": [
        "face_planar",
        "face_cyl",
        "face_other",
        "edge_str",
        "edge_circ",
        "vertex",
        "body_solid",
        "body_sheet",
        "bodies_2",
        "sk_line",
        "sk_arc",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": false,
      "action": null
    },
    {
      "id": "mass_props",
      "name": "Mass",
      "slot": "reference",
      "key": null,
      "feature": null,
      "mcp": "mass_properties",
      "accepts": [
        "body_solid"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": null,
      "gui": true,
      "action": "btn:mass"
    },
    {
      "id": "interference",
      "name": "Interference",
      "slot": "reference",
      "key": null,
      "feature": null,
      "mcp": "check_interference",
      "accepts": [
        "bodies_2"
      ],
      "needs": {
        "bodies": 2
      },
      "refusal": null,
      "gui": false,
      "action": null
    },
    {
      "id": "edit_feature",
      "name": "Edit",
      "slot": "modify",
      "key": null,
      "feature": null,
      "mcp": "set_feature_expr",
      "accepts": [
        "body_solid",
        "face_planar",
        "face_cyl",
        "face_other",
        "sk_loop",
        "art",
        "datum_plane",
        "datum_axis",
        "coordsys",
        "body_sheet"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "btn:edit"
    },
    {
      "id": "delete_face",
      "name": "Delete Face",
      "slot": "modify",
      "key": null,
      "feature": "DeleteFace",
      "mcp": "delete_face",
      "accepts": [
        "face_planar",
        "face_cyl",
        "face_other"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": "Delete Face needs a body — add or import one first",
      "gui": true,
      "action": "fly:dressup#3"
    },
    {
      "id": "colour",
      "name": "Colour",
      "slot": "modify",
      "key": null,
      "feature": null,
      "mcp": null,
      "accepts": [
        "body_solid",
        "body_sheet"
      ],
      "needs": {
        "bodies": 1
      },
      "refusal": null,
      "gui": true,
      "action": "btn:colour"
    },
    {
      "id": "delete",
      "name": "Delete",
      "slot": "modify",
      "key": "Del",
      "feature": null,
      "mcp": null,
      "accepts": [
        "body_solid",
        "body_sheet",
        "sk_loop",
        "art",
        "datum_plane",
        "datum_axis",
        "coordsys",
        "bodies_2",
        "sk_line",
        "sk_arc",
        "sk_point",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "btn:delete"
    },
    {
      "id": "sk_line_t",
      "name": "Line",
      "slot": "create",
      "key": "L",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_none",
        "sk_point",
        "sk_line",
        "sk_arc",
        "sk_2ent"
      ],
      "needs": {},
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        "sk_2ent"
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    {
      "id": "sk_circle",
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    {
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        "sk_none",
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        "sk_2ent"
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      "action": "key:A"
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    {
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      "action": "key:S"
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    },
    {
      "id": "sk_polygon",
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      "needs": {},
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      "gui": true,
      "action": "key:G"
    },
    {
      "id": "sk_point_t",
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        "sk_none",
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      "gui": true,
      "action": "key:P"
    },
    {
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      "key": "O",
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      "needs": {},
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    },
    {
      "id": "sk_trim",
      "name": "Trim",
      "slot": "remove",
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      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_line",
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        "sk_2ent"
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      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:T"
    },
    {
      "id": "sk_fillet",
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      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_line",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:F"
    },
    {
      "id": "sk_chamfer",
      "name": "Chamfer",
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      "key": "H",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_line",
        "sk_2ent"
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      "needs": {},
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      "gui": true,
      "action": "key:H"
    },
    {
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      "mode": "sketch",
      "accepts": [
        "sk_line",
        "sk_arc",
        "sk_2ent"
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      "needs": {},
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      "gui": true,
      "action": "key:M"
    },
    {
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      "feature": "Sketch",
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      "mode": "sketch",
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        "sk_line",
        "sk_arc",
        "sk_point",
        "sk_2ent"
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      "needs": {},
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      "gui": true,
      "action": null
    },
    {
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      "slot": "reference",
      "key": "D",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_none",
        "sk_line",
        "sk_arc",
        "sk_point",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:D"
    },
    {
      "id": "sk_constrain",
      "name": "Constrain",
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      "key": "K",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
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        "sk_line",
        "sk_arc",
        "sk_point",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:K"
    },
    {
      "id": "sk_construct",
      "name": "Construction",
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      "key": "Q",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_none",
        "sk_line",
        "sk_arc",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:Q"
    },
    {
      "id": "sk_extend",
      "name": "Extend",
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      "key": "X",
      "feature": "Sketch",
      "mcp": null,
      "mode": "sketch",
      "accepts": [
        "sk_line",
        "sk_arc",
        "sk_2ent"
      ],
      "needs": {},
      "refusal": null,
      "gui": true,
      "action": "key:X"
    },
    {
      "id": "sk_delete",
      "name": "Delete",
      "slot": "modify",
      "key": "Del",
      "feature": "Sketch",
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      "mode": "sketch",
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        "sk_line",
        "sk_arc",
        "sk_point",
        "sk_2ent"
      ],
      "needs": {},
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      "gui": true,
      "action": "btn:delete"
    }
  ],
  "chrome_only": {
    "_why": "document-level actions act on the DOCUMENT, not on a selection, so they stay in chrome and never enter the offer (see 4.1)",
    "items": [
      "Import STEP",
      "Import mesh",
      "Text",
      "SVG",
      "Export STEP",
      "Commit to Plate",
      "Undo",
      "Redo",
      "Variables",
      "Section view",
      "Origin planes",
      "World axes"
    ]
  },
  "_ratified": "Row order ratified 2026-07-31 by Tommaso. Changing an index is a breaking change (charter 4.1)."
}