Extend FreeCAD WebAssembly runtime support

docs/business-acceptance/Part.json

@@ -0,0 +1,23 @@
+{
+  "module": "Part",
+  "target": "FreeCADWebPartBoxProbe",
+  "contract": "freecad-web-part/create-recompute/v1",
+  "executable": true,
+  "command": "part.createRecompute",
+  "input": {
+    "schema": "freecad-web-part/create-recompute/v1",
+    "module": "Part",
+    "action": "create/recompute",
+    "type": "Part::Box",
+    "dimensions": [2, 3, 4]
+  },
+  "businessCase": {
+    "action": "create/recompute",
+    "type": "Part::Box",
+    "dimensions": [2, 3, 4],
+    "expected": {
+      "volume": 24,
+      "resourcesReleased": true
+    }
+  }
+}

src/App/CMakeLists.txt

@@ -367,6 +367,11 @@ endif(FREECAD_USE_PCH)
 target_sources(FreeCADApp PRIVATE ${FreeCADApp_SRCS})
 target_link_libraries(FreeCADApp ${FreeCADApp_LIBS})
 
+if(EMSCRIPTEN)
+    # PropertyListsT uses catch-and-fallback when Python assigns an object list.
+    target_compile_options(FreeCADApp PRIVATE "-fexceptions")
+endif()
+
 if (MSVC)
     target_compile_definitions(FreeCADApp PRIVATE WIN32_LEAN_AND_MEAN)
     target_compile_options(FreeCADApp PRIVATE /wd4251 /wd4273 /wd4275)

src/Mod/Draft/draftutils/params.py

@@ -701,6 +701,14 @@ def _get_param_dictionary():
         if fd.open(QtCore.QIODevice.ReadOnly | QtCore.QFile.Text):
             text = QtCore.QTextStream(fd).readAll()
             fd.close()
+        elif not App.GuiUp:
+            # Headless runtimes embed the source UI files without Qt resources.
+            from pathlib import Path
+
+            source = Path(__file__).resolve().parent.parent / "Resources" / "ui" / fnm.rsplit("/", 1)[-1]
+            if not source.is_file():
+                continue
+            text = source.read_text(encoding="utf-8")
         else:
             continue
 

src/Mod/Draft/draftutils/utils.py

@@ -267,7 +267,9 @@ def svg_precision():
     int
         params.get_param("svgPrecision")
     """
-    return params.get_param("svgPrecision")
+    value = params.get_param("svgPrecision")
+    # A headless parameter database may not contain the SVG preference yet.
+    return 3 if value is None else value
 
 
 def tolerance():

src/Mod/Import/App/CMakeLists.txt

@@ -88,7 +88,12 @@ target_include_directories(
     ${CMAKE_CURRENT_BINARY_DIR}
     ${CMAKE_CURRENT_SOURCE_DIR}
 )
-target_link_libraries(Import ${Import_LIBS})
+target_link_libraries(Import ${Import_LIBS})
+
+if(EMSCRIPTEN)
+    # Keep native parser failures inside the Python error/transaction boundary.
+    target_compile_options(Import PRIVATE "-fexceptions")
+endif()
 
 if (MSVC)
     target_compile_options(Import PRIVATE /wd4251 /wd4275)

src/Mod/PartDesign/WizardShaft/Shaft.py

@@ -22,13 +22,23 @@
 # *                                                                            *
 # ******************************************************************************/
 
-import FreeCAD, FreeCADGui
+import FreeCAD
+if FreeCAD.GuiUp:
+    import FreeCADGui
+else:
+    FreeCADGui = None
 from .SegmentFunction import SegmentFunction, IntervalFunction, StressFunction, TranslationFunction
 from .ShaftFeature import ShaftFeature
-from .ShaftDiagram import Diagram
 import math
 
 
+def Diagram(*args, **kwargs):
+    # Geometry creation does not require the desktop plotting backend.
+    from .ShaftDiagram import Diagram as ShaftDiagram
+
+    return ShaftDiagram(*args, **kwargs)
+
+
 class ShaftSegment:
     def __init__(self, l, d, di):
         self.length = l
@@ -113,12 +123,12 @@ class Shaft:
             if self.segments[i].constraintType != "Fixed":
                 continue
             if i == len(self.segments) - 1:
-                self.segments[index].constraint.References = [
-                    (self.feature.feature, "Face%u" % (2 * (index + 1) + 1))
+                self.segments[i].constraint.References = [
+                    (self.feature.feature, "Face%u" % (2 * (i + 1) + 1))
                 ]
             else:
                 # Remove reference since it is now in the middle of the shaft (which is not allowed)
-                self.segments[index].constraint.References = [(None, "")]
+                self.segments[i].constraint.References = [(None, "")]
 
     def updateSegment(self, index, length=None, diameter=None, innerdiameter=None):
         oldLength = self.segments[index].length

src/Mod/PartDesign/WizardShaft/ShaftFeature.py

@@ -22,7 +22,11 @@
 # *                                                                            *
 # ******************************************************************************/
 
-import FreeCAD, FreeCADGui
+import FreeCAD
+if FreeCAD.GuiUp:
+    import FreeCADGui
+else:
+    FreeCADGui = None
 import Part, Sketcher
 
 
@@ -148,11 +152,13 @@ class ShaftFeature:
             self.feature.ReferenceAxis = (self.sketch, ["H_Axis"])
             self.feature.Angle = 360.0
             self.Doc.recompute()
-            self.Gui.hide("SketchShaft")
+            if self.Gui is not None:
+                self.Gui.getDocument(self.Doc.Name).getObject(self.sketch.Name).hide()
         else:
             self.Doc.recompute()
         # FIXME: Will give a warning in the console if the active window is not the feature
-        self.Gui.SendMsgToActiveView("ViewFit")
+        if self.Gui is not None:
+            self.Gui.SendMsgToActiveView("ViewFit")
 
     def updateSegment(self, segment, oldLength, length, diameter, innerdiameter):
         constrRadius = 4 + segment * 6

src/WebAssembly/FreeCADCoreProbe/AssemblyRuntimeProbe.cpp

@@ -488,35 +488,32 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
         return dispatchResponse.c_str();
     }
 
+    bool jointCommandsOnly = !records.isEmpty();
+    for (const auto& value : records) {
+        const QString id = value.toObject().value(QStringLiteral("apiId")).toString();
+        if (!id.startsWith(QStringLiteral("Assembly:desktop:"))) {
+            jointCommandsOnly = false;
+            break;
+        }
+    }
     ReadonlyFixture readonlyFixture;
     bool hasReadonlyFixture = false;
-    if (tier == QStringLiteral("tier-1-readonly")) {
+    if (tier == QStringLiteral("tier-1-readonly") && !jointCommandsOnly) {
         hasReadonlyFixture = true;
         readonlyFixture = runReadonlyFixture();
     }
     ViewResourceFixture viewResourceFixture;
     bool hasViewResourceFixture = false;
-    if (tier == QStringLiteral("tier-1-readonly")) {
+    if (tier == QStringLiteral("tier-1-readonly") && !jointCommandsOnly) {
         hasViewResourceFixture = true;
         viewResourceFixture = runViewResourceFixture();
     }
     DocumentGraphFixture documentGraphFixture;
     bool hasDocumentGraphFixture = false;
-    if (tier == QStringLiteral("object-contract")) {
+    if (tier == QStringLiteral("object-contract") && !jointCommandsOnly) {
         hasDocumentGraphFixture = true;
         documentGraphFixture = runDocumentGraphFixture();
     }
-    bool hasDesktopFixture = false;
-    for (const auto& value : records) {
-        if (value.toObject().value(QStringLiteral("apiId")).toString().startsWith(QStringLiteral("Assembly:desktop:"))) {
-            hasDesktopFixture = true;
-            break;
-        }
-    }
-    DocumentGraphFixture desktopFixture;
-    if (hasDesktopFixture) {
-        desktopFixture = runDocumentGraphFixture();
-    }
 
     QJsonArray results;
     for (const auto& value : records) {
@@ -547,48 +544,199 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
             result.insert(QStringLiteral("code"), QStringLiteral("invalid_record"));
             result.insert(QStringLiteral("message"), QStringLiteral("Assembly API record requires apiId, name and family"));
         }
-        // FC_WEB_AUDITED_DESKTOP_FAMILY("Assembly")
-        else if (apiId.startsWith(QStringLiteral("Assembly:desktop:"))) {
-            const QJsonObject commandArgs = input.value(QStringLiteral("args")).toObject();
-            QString operation = QStringLiteral("select-assembly-items");
-            QJsonArray selection = commandArgs.value(QStringLiteral("selection")).toArray();
-            if (name == QStringLiteral("Assembly_LinkSelectLinked")) {
-                operation = QStringLiteral("select-linked-object");
-                if (selection.isEmpty()) selection.append(QStringLiteral("Component"));
+        else if (apiId == QStringLiteral("Assembly:desktop:Assembly_CreateJointAngle")
+            || apiId == QStringLiteral("Assembly:desktop:Assembly_CreateJointBall")
+            || apiId == QStringLiteral("Assembly:desktop:Assembly_CreateJointBelt")
+            || apiId == QStringLiteral("Assembly:desktop:Assembly_CreateJointCylindrical")) {
+            QJsonObject jointArgs = input.value(QStringLiteral("args")).toObject();
+            const int jointType = apiId.endsWith(QStringLiteral("Angle")) ? 8
+                : apiId.endsWith(QStringLiteral("Ball")) ? 4
+                : apiId.endsWith(QStringLiteral("Belt")) ? 12 : 2;
+            jointArgs.insert(QStringLiteral("jointTypeIndex"), jointType);
+            const QByteArray encoded = QJsonDocument(jointArgs).toJson(QJsonDocument::Compact);
+            const PyGILState_STATE gil = PyGILState_Ensure();
+            PyObject* scope = PyDict_New();
+            PyObject* payload = PyUnicode_DecodeUTF8(encoded.constData(), encoded.size(), "strict");
+            PyObject* executed = nullptr;
+            if (scope && payload
+                && PyDict_SetItemString(scope, "__builtins__", PyEval_GetBuiltins()) == 0
+                && PyDict_SetItemString(scope, "payload", payload) == 0) {
+                executed = PyRun_String(R"PY(
+import json
+import math
+import FreeCAD as App
+import JointObject
+import UtilsAssembly
+
+def create_web_joint(args):
+    document_id = args.get('documentId')
+    assembly_name = args.get('assembly')
+    if not isinstance(document_id, str) or not document_id:
+        raise ValueError('documentId must identify an existing Assembly runtime document')
+    if not isinstance(assembly_name, str) or not assembly_name:
+        raise ValueError('assembly must name the active assembly object')
+    doc = App.getDocument(document_id)
+    assembly = doc.getObject(assembly_name)
+    if assembly is None or not assembly.isDerivedFrom('Assembly::AssemblyObject'):
+        raise ValueError('assembly must identify an Assembly::AssemblyObject in the document')
+    references = args.get('references')
+    if not isinstance(references, list) or len(references) != 2:
+        raise ValueError('references must contain two {object, subelements} entries')
+    refs = []
+    for reference in references:
+        obj = doc.getObject(reference['object'])
+        subelements = reference.get('subelements')
+        if obj is None or not isinstance(subelements, list) or len(subelements) != 1:
+            raise ValueError('each reference requires an existing object and one subelement path')
+        if not isinstance(subelements[0], str):
+            raise ValueError('subelement path must be a string')
+        if obj != assembly and obj not in assembly.Group:
+            raise ValueError('reference object must belong to the requested assembly')
+        refs.append((obj, subelements))
+    parts = [UtilsAssembly.getObject(ref) for ref in refs]
+    if any(part is None for part in parts) or parts[0] == parts[1]:
+        raise ValueError('select two elements from two separate parts')
+    properties = args.get('properties', {})
+    if not isinstance(properties, dict):
+        raise ValueError('properties must be an object')
+    joint_type = JointObject.JointTypes[args['jointTypeIndex']]
+    allowed = set()
+    if joint_type in JointObject.JointUsingAngle:
+        allowed.add('Angle')
+    if joint_type in JointObject.JointUsingDistance:
+        allowed.add('Distance')
+    if joint_type in JointObject.JointUsingDistance2:
+        allowed.add('Distance2')
+    if joint_type in JointObject.JointUsingLimitLength:
+        allowed.update(('LengthMin', 'LengthMax'))
+    if joint_type in JointObject.JointUsingLimitAngle:
+        allowed.update(('AngleMin', 'AngleMax'))
+    for key, value in properties.items():
+        if key not in allowed:
+            raise ValueError('parameter is unavailable for ' + joint_type + ': ' + key)
+        if isinstance(value, bool) or not isinstance(value, (int, float)) or not math.isfinite(value):
+            raise ValueError('joint parameters must be finite numbers in native property units')
+        if joint_type in JointObject.JointNoNegativeDistance and key in ('Distance', 'Distance2') and value < 0:
+            raise ValueError('joint distances must be non-negative')
+    for lower, upper in (('LengthMin', 'LengthMax'), ('AngleMin', 'AngleMax')):
+        if lower in properties and upper in properties and properties[lower] > properties[upper]:
+            raise ValueError(lower + ' must not exceed ' + upper)
+    doc.openTransaction('Create assembly joint')
+    try:
+        assembly.ensureIdentityPlacements()
+        group = UtilsAssembly.getJointGroup(assembly)
+        joint = group.newObject('App::FeaturePython', 'Joint')
+        JointObject.Joint(joint, args['jointTypeIndex'])
+        joint.Proxy.setJointConnectors(joint, refs)
+        for key, value in properties.items():
+            if key not in joint.PropertiesList:
+                raise ValueError('parameter is unavailable for this joint: ' + key)
+            setattr(joint, key, value)
+        if 'label' in args:
+            if not isinstance(args['label'], str):
+                raise ValueError('label must be a string')
+            joint.Label = args['label']
+        JointObject.solveIfAllowed(assembly)
+        assembly.recompute(True)
+        doc.recompute()
+        if any('Invalid' in obj.State for obj in (assembly, joint)):
+            raise RuntimeError('Assembly joint recompute failed')
+        values = {}
+        for key in properties:
+            value = getattr(joint, key)
+            values[key] = value.Value if hasattr(value, 'Value') else value
+        output = dict(documentId=doc.Name, assembly=assembly.Name, object=joint.Name,
+                      label=joint.Label, jointType=str(joint.JointType), properties=values,
+                      references=[dict(object=getattr(joint, key)[0].Name,
+                                       subelements=list(getattr(joint, key)[1]))
+                                  for key in ('Reference1', 'Reference2')])
+        serialized = json.dumps(output, allow_nan=False)
+        doc.commitTransaction()
+        return serialized
+    except Exception:
+        doc.abortTransaction()
+        raise
+
+joint_result = create_web_joint(json.loads(payload))
+)PY", Py_file_input, scope, scope);
             }
-            else if (name == QStringLiteral("Assembly_SelectComponentsWithDoFs")) {
-                operation = QStringLiteral("select-components-with-dofs");
-                selection = commandArgs.value(QStringLiteral("componentIds")).toArray();
-                if (selection.isEmpty()) selection.append(QStringLiteral("Component"));
-            }
-            else if (name == QStringLiteral("Assembly_SelectJointsOfComponent")) {
-                operation = QStringLiteral("select-joints-of-component");
-                selection = commandArgs.value(QStringLiteral("jointIds")).toArray();
-                if (selection.isEmpty()) selection.append(QStringLiteral("JointGroup"));
+            PyObject* output = executed ? PyDict_GetItemString(scope, "joint_result") : nullptr;
+            const char* outputText = output ? PyUnicode_AsUTF8(output) : nullptr;
+            if (outputText) {
+                const QJsonDocument jointDocument = QJsonDocument::fromJson(QByteArray(outputText));
+                if (jointDocument.isObject()) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                    result.insert(QStringLiteral("code"), QStringLiteral("native_joint_created"));
+                    result.insert(QStringLiteral("result"), jointDocument.object());
+                    result.insert(QStringLiteral("resourcesReleased"), false);
+                }
+                else {
+                    result.insert(QStringLiteral("status"), QStringLiteral("not_implemented"));
+                    result.insert(QStringLiteral("code"), QStringLiteral("invalid_native_result"));
+                }
             }
             else {
-                operation = name.contains(QStringLiteral("Conflicting")) ? QStringLiteral("select-conflicting-constraints")
-                    : name.contains(QStringLiteral("Malformed")) ? QStringLiteral("select-malformed-constraints")
-                    : QStringLiteral("select-redundant-constraints");
-                selection = commandArgs.value(QStringLiteral("constraintIds")).toArray();
+                result.insert(QStringLiteral("status"), QStringLiteral("not_implemented"));
+                result.insert(QStringLiteral("code"), QStringLiteral("joint_creation_failed"));
+                result.insert(QStringLiteral("message"), QString::fromStdString(pythonError("Assembly joint execution failed")));
+            }
+            Py_XDECREF(executed);
+            Py_XDECREF(payload);
+            Py_XDECREF(scope);
+            PyGILState_Release(gil);
+        }
+        else if (apiId.startsWith(QStringLiteral("Assembly:desktop:"))) {
+            const QJsonObject commandArgs = input.value(QStringLiteral("args")).toObject();
+            result.insert(QStringLiteral("status"), QStringLiteral("not_implemented"));
+            result.insert(QStringLiteral("code"), QStringLiteral("implementation_required"));
+            result.insert(QStringLiteral("message"), QStringLiteral("Assembly desktop command requires a current-document native handler and Web selection integration"));
+            const bool malformed = apiId == QStringLiteral("Assembly:desktop:Assembly_SelectMalformedConstraints");
+            const bool redundant = apiId == QStringLiteral("Assembly:desktop:Assembly_SelectRedundantConstraints")
+                || apiId == QStringLiteral("Assembly:desktop:Assembly_SelectConflictingConstraints");
+            if (malformed || redundant) {
+                const QString documentId = commandArgs.value(QStringLiteral("documentId")).toString();
+                const QString assemblyName = commandArgs.value(QStringLiteral("assembly")).toString();
+                App::Document* currentDocument = documentId.isEmpty() ? nullptr
+                    : App::GetApplication().getDocument(documentId.toUtf8().constData());
+                auto* assembly = currentDocument && !assemblyName.isEmpty()
+                    ? dynamic_cast<Assembly::AssemblyObject*>(currentDocument->getObject(assemblyName.toUtf8().constData()))
+                    : nullptr;
+                if (!assembly) {
+                    result.insert(QStringLiteral("code"), QStringLiteral("invalid_request"));
+                    result.insert(QStringLiteral("message"), QStringLiteral("documentId and assembly must identify an existing AssemblyObject in this runtime"));
+                }
+                else {
+                    try {
+                        // Official conflicting selection uses the solver's redundant list too.
+                        const auto names = malformed ? assembly->getLastMalformed() : assembly->getLastRedundant();
+                        QJsonArray selection;
+                        for (const auto& objectName : names) {
+                            auto* selected = currentDocument->getObject(objectName.c_str());
+                            if (!selected) continue;
+                            QJsonObject item;
+                            item.insert(QStringLiteral("documentId"), QString::fromUtf8(currentDocument->getName()));
+                            item.insert(QStringLiteral("object"), QString::fromUtf8(selected->getNameInDocument()));
+                            selection.append(item);
+                        }
+                        QJsonObject typed;
+                        typed.insert(QStringLiteral("documentId"), documentId);
+                        typed.insert(QStringLiteral("assembly"), assemblyName);
+                        typed.insert(QStringLiteral("selection"), selection);
+                        result.insert(QStringLiteral("result"), typed);
+                        // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Assembly_SelectMalformedConstraints")
+                        // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Assembly_SelectRedundantConstraints")
+                        // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Assembly_SelectConflictingConstraints")
+                        result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                        result.insert(QStringLiteral("code"), QStringLiteral("native_selection_resolved"));
+                        result.insert(QStringLiteral("message"), QStringLiteral("Current assembly solver selection resolved"));
+                        result.insert(QStringLiteral("resourcesReleased"), true);
+                    }
+                    catch (const std::exception& error) {
+                        result.insert(QStringLiteral("code"), QStringLiteral("native_selection_failed"));
+                        result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+                    }
+                }
             }
-            result.insert(QStringLiteral("status"), desktopFixture.passed ? QStringLiteral("exposed") : QStringLiteral("not_implemented"));
-            result.insert(QStringLiteral("code"), desktopFixture.passed ? QStringLiteral("native_desktop_selection") : QStringLiteral("native_fixture_failed"));
-            result.insert(QStringLiteral("message"), desktopFixture.passed
-                ? QStringLiteral("Assembly desktop selection executed against a native document graph")
-                : QString::fromStdString(desktopFixture.error));
-            result.insert(QStringLiteral("parameterSchema"), QStringLiteral("{selection?:string[],componentIds?:string[],jointIds?:string[],constraintIds?:string[]}"));
-            result.insert(QStringLiteral("returnSchema"), QStringLiteral("{command:string,operation:string,selection:string[],documentGraph:object}"));
-            QJsonObject typed;
-            typed.insert(QStringLiteral("command"), name);
-            typed.insert(QStringLiteral("operation"), operation);
-            typed.insert(QStringLiteral("selection"), selection);
-            typed.insert(QStringLiteral("objectCount"), desktopFixture.objectCount);
-            typed.insert(QStringLiteral("assemblyCount"), desktopFixture.assemblyCount);
-            typed.insert(QStringLiteral("linkConnected"), desktopFixture.linkConnected);
-            result.insert(QStringLiteral("result"), typed);
-            result.insert(QStringLiteral("resourcesReleased"), desktopFixture.resourcesReleased);
-            result.insert(QStringLiteral("replay"), QStringLiteral("native-assembly-desktop-selection"));
         }
         else if (tier == QStringLiteral("object-contract")
             && !(apiId.startsWith(QStringLiteral("obj:Assembly:")))) {

src/WebAssembly/FreeCADCoreProbe/CAMRuntimeProbe.cpp

@@ -27,6 +27,8 @@
 #include <QJsonArray>
 #include <QJsonDocument>
 #include <QJsonObject>
+#include <QCryptographicHash>
+#include <QRegularExpression>
 #include <QString>
 
 #include <cstddef>
@@ -1115,26 +1117,96 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
         return dispatchResponse.c_str();
     }
     if (command == QStringLiteral("cam.import") || command == QStringLiteral("cam.export")) {
-        const QJsonObject args = object.value(QStringLiteral("args")).toObject();
-        const QString content = args.value(QStringLiteral("content")).toString();
-        QJsonParseError contentError;
-        const QJsonDocument contentDoc = QJsonDocument::fromJson(content.toUtf8(), &contentError);
-        if (!contentDoc.isObject() || !contentDoc.object().value(QStringLiteral("commands")).isArray()) {
-            QJsonObject error; error.insert(QStringLiteral("ok"), false); error.insert(QStringLiteral("code"), QStringLiteral("invalid_document")); error.insert(QStringLiteral("error"), QStringLiteral("CAM JSON requires a commands array"));
-            dispatchResponse = QJsonDocument(error).toJson(QJsonDocument::Compact).toStdString(); return dispatchResponse.c_str();
-        }
-        const QJsonArray commands = contentDoc.object().value(QStringLiteral("commands")).toArray();
         auto& application = App::GetApplication();
-        App::Document* doc = application.newDocument("CAMImportExportDocument", "CAM Import Export", {false, true});
-        auto* path = doc ? doc->addObject("Path::Feature", "Toolpath") : nullptr;
-        if (!doc || !path) { if (doc) application.closeDocument(doc); QJsonObject error; error.insert(QStringLiteral("ok"), false); error.insert(QStringLiteral("code"), QStringLiteral("document_creation_failed")); dispatchResponse = QJsonDocument(error).toJson(QJsonDocument::Compact).toStdString(); return dispatchResponse.c_str(); }
-        doc->recompute();
-        QJsonObject out; out.insert(QStringLiteral("ok"), true); out.insert(QStringLiteral("schema"), QStringLiteral("freecad-web-cam/import-export/v1")); out.insert(QStringLiteral("module"), QStringLiteral("CAM")); out.insert(QStringLiteral("action"), command == QStringLiteral("cam.import") ? QStringLiteral("import") : QStringLiteral("export")); out.insert(QStringLiteral("format"), QStringLiteral(".json"));
-        QJsonObject documentInfo; documentInfo.insert(QStringLiteral("name"), QStringLiteral("CAMImportExportDocument")); documentInfo.insert(QStringLiteral("activeAfterClose"), 0); out.insert(QStringLiteral("document"), documentInfo);
-        QJsonObject objectInfo; objectInfo.insert(QStringLiteral("name"), QStringLiteral("Toolpath")); objectInfo.insert(QStringLiteral("type"), QStringLiteral("Path::Feature")); out.insert(QStringLiteral("object"), objectInfo);
-        out.insert(QStringLiteral("imported"), QJsonObject{{QStringLiteral("commandCount"), commands.size()}, {QStringLiteral("length"), commands.size() > 1 ? 10 : 0}});
-        QJsonObject exported; exported.insert(QStringLiteral("format"), QStringLiteral(".json")); exported.insert(QStringLiteral("content"), content); exported.insert(QStringLiteral("byteLength"), content.toUtf8().size()); out.insert(QStringLiteral("exported"), exported);
-        out.insert(QStringLiteral("resourcesReleased"), true); application.closeDocument(doc); dispatchResponse = QJsonDocument(out).toJson(QJsonDocument::Compact).toStdString(); return dispatchResponse.c_str();
+        App::Document* doc = nullptr;
+        bool createdDocument = false;
+        bool transaction = false;
+        QString errorCode = QStringLiteral("invalid_document");
+        try {
+            const QString documentName = args.value(QStringLiteral("documentId")).toString(QStringLiteral("CAMImportExportDocument"));
+            const QString objectName = args.value(QStringLiteral("objectName")).toString(QStringLiteral("Toolpath"));
+            const QRegularExpression identifier(QStringLiteral("^[A-Za-z_][A-Za-z0-9_]{0,63}$"));
+            if (!identifier.match(documentName).hasMatch() || !identifier.match(objectName).hasMatch())
+                throw std::runtime_error("CAM documentId and objectName must be ASCII identifiers up to 64 characters");
+            if (args.value(QStringLiteral("format")).toString() != QStringLiteral(".json")) {
+                errorCode = QStringLiteral("unsupported_format");
+                throw std::runtime_error("CAM toolpath exchange supports .json");
+            }
+            const bool importing = command == QStringLiteral("cam.import");
+            Path::Toolpath importedPath;
+            if (importing) {
+                const QJsonDocument parsed = QJsonDocument::fromJson(args.value(QStringLiteral("content")).toString().toUtf8());
+                if (!parsed.isObject() || !parsed.object().value(QStringLiteral("commands")).isArray())
+                    throw std::runtime_error("CAM JSON requires a commands array");
+                for (const auto& item : parsed.object().value(QStringLiteral("commands")).toArray()) {
+                    if (!item.isObject()) throw std::runtime_error("Each CAM command must be an object");
+                    const QJsonObject input = item.toObject();
+                    const QString name = input.value(QStringLiteral("code")).toString().toUpper();
+                    if (!QRegularExpression(QStringLiteral("^[GM][0-9]+(?:\\.[0-9]+)?$")).match(name).hasMatch())
+                        throw std::runtime_error("CAM code must be a G or M command");
+                    std::map<std::string, double> parameters;
+                    for (auto parameter = input.begin(); parameter != input.end(); ++parameter) {
+                        if (parameter.key() == QStringLiteral("code")) continue;
+                        const QString key = parameter.key().toUpper();
+                        if (!QRegularExpression(QStringLiteral("^[A-Z]$")).match(key).hasMatch()
+                            || !parameter.value().isDouble() || !std::isfinite(parameter.value().toDouble())
+                            || !parameters.emplace(key.toStdString(), parameter.value().toDouble()).second)
+                            throw std::runtime_error("CAM parameters must be unique finite numeric letter values");
+                    }
+                    importedPath.addCommandNoRecalc(Path::Command(name.toUtf8().constData(), parameters));
+                }
+                importedPath.recalculate();
+            }
+            doc = application.getDocument(documentName.toUtf8().constData());
+            if (!doc && importing) {
+                doc = application.newDocument(documentName.toUtf8().constData(), documentName.toUtf8().constData(), {false, true});
+                createdDocument = true;
+            }
+            errorCode = QStringLiteral("document_not_found");
+            if (!doc) throw std::runtime_error("CAM document does not exist; import a toolpath first");
+            auto* existing = doc->getObject(objectName.toUtf8().constData());
+            auto* feature = dynamic_cast<Path::Feature*>(existing);
+            errorCode = QStringLiteral("invalid_object");
+            if (existing && !feature) throw std::runtime_error("Selected CAM object is not a Path::Feature");
+            if (importing) {
+                doc->openTransaction("Import CAM toolpath JSON");
+                transaction = true;
+                if (!feature) feature = dynamic_cast<Path::Feature*>(doc->addObject("Path::Feature", objectName.toUtf8().constData()));
+                if (!feature) throw std::runtime_error("CAM toolpath object could not be created");
+                feature->Path.setValue(importedPath);
+                bool recomputeError = false;
+                errorCode = QStringLiteral("recompute_failed");
+                if (doc->recompute({}, false, &recomputeError) < 0 || recomputeError)
+                    throw std::runtime_error("CAM document recompute failed");
+            }
+            if (!feature) throw std::runtime_error("Selected CAM toolpath does not exist");
+            Path::Toolpath stored(feature->Path.getValue());
+            const double length = stored.getLength();
+            QJsonArray exportedCommands;
+            for (const auto* item : stored.getCommands()) {
+                QJsonObject output{{QStringLiteral("code"), QString::fromStdString(item->Name)}};
+                for (const auto& parameter : item->Parameters)
+                    output.insert(QString::fromStdString(parameter.first).toLower(), parameter.second);
+                exportedCommands.append(output);
+            }
+            const QByteArray content = QJsonDocument(QJsonObject{{QStringLiteral("commands"), exportedCommands}, {QStringLiteral("length"), length}}).toJson(QJsonDocument::Compact);
+            QJsonObject out{{QStringLiteral("ok"), true}, {QStringLiteral("schema"), QStringLiteral("freecad-web-cam/import-export/v1")},
+                {QStringLiteral("module"), QStringLiteral("CAM")}, {QStringLiteral("action"), importing ? QStringLiteral("import") : QStringLiteral("export")},
+                {QStringLiteral("format"), QStringLiteral(".json")}, {QStringLiteral("source"), QStringLiteral("freecad-source")},
+                {QStringLiteral("document"), QJsonObject{{QStringLiteral("name"), QString::fromUtf8(doc->getName())}, {QStringLiteral("objectCount"), static_cast<int>(doc->countObjects())}, {QStringLiteral("keptOpen"), true}}},
+                {QStringLiteral("object"), QJsonObject{{QStringLiteral("name"), QString::fromUtf8(feature->getNameInDocument())}, {QStringLiteral("type"), QStringLiteral("Path::Feature")}}},
+                {QStringLiteral("imported"), QJsonObject{{QStringLiteral("commandCount"), static_cast<int>(stored.getSize())}, {QStringLiteral("length"), length}}},
+                {QStringLiteral("exported"), QJsonObject{{QStringLiteral("format"), QStringLiteral(".json")}, {QStringLiteral("content"), QString::fromUtf8(content)}, {QStringLiteral("byteLength"), content.size()}, {QStringLiteral("gcode"), QString::fromStdString(stored.toGCode())}}},
+                {QStringLiteral("stateSha256"), QString::fromLatin1(QCryptographicHash::hash(content, QCryptographicHash::Sha256).toHex())}};
+            dispatchResponse = QJsonDocument(out).toJson(QJsonDocument::Compact).toStdString();
+            if (transaction) { doc->commitTransaction(); transaction = false; }
+        }
+        catch (const std::exception& error) {
+            if (transaction && doc) doc->abortTransaction();
+            if (createdDocument && doc) application.closeDocument(doc);
+            dispatchResponse = QJsonDocument(QJsonObject{{QStringLiteral("ok"), false}, {QStringLiteral("code"), errorCode}, {QStringLiteral("error"), QString::fromUtf8(error.what())}}).toJson(QJsonDocument::Compact).toStdString();
+        }
+        return dispatchResponse.c_str();
     }
     QJsonArray results;
     for (const auto& value : records) {

src/WebAssembly/FreeCADCoreProbe/CMakeLists.txt

@@ -10,7 +10,7 @@ else()
     set(_freecad_web_link_optimization "-O2")
 endif()
 
-add_executable(FreeCADWebPartBoxProbe PartBoxProbe.cpp)
+add_executable(FreeCADWebPartBoxProbe PartBoxProbe.cpp PartDesktopCommands.cpp)
 target_compile_features(FreeCADWebPartBoxProbe PRIVATE cxx_std_17)
 target_compile_options(FreeCADWebPartBoxProbe PRIVATE "-O2" "-g0" "-fexceptions" "-pthread" "-sUSE_PTHREADS=1" "-sPTHREAD_POOL_SIZE=4")
 target_include_directories(FreeCADWebPartBoxProbe PRIVATE
@@ -75,13 +75,15 @@ add_executable(FreeCADWebPartDesktopCommandProbe PartDesktopCommandProbe.cpp Par
 target_compile_features(FreeCADWebPartDesktopCommandProbe PRIVATE cxx_std_17)
 target_compile_options(FreeCADWebPartDesktopCommandProbe PRIVATE "-O2" "-g0" "-fexceptions" "-pthread")
 target_include_directories(FreeCADWebPartDesktopCommandProbe PRIVATE
+    ${Python3_INCLUDE_DIRS}
+    ${PYTHON_INCLUDE_DIRS}
     "${CMAKE_BINARY_DIR}"
     "${CMAKE_BINARY_DIR}/src"
     "${CMAKE_SOURCE_DIR}/src"
     "${OCC_INCLUDE_DIR}"
 )
 target_link_directories(FreeCADWebPartDesktopCommandProbe PRIVATE "${OCC_LIBRARY_DIR}")
-target_link_libraries(FreeCADWebPartDesktopCommandProbe PRIVATE Qt5::Core ${OCC_LIBRARIES})
+target_link_libraries(FreeCADWebPartDesktopCommandProbe PRIVATE Qt5::Core ${OCC_LIBRARIES} ${Python3_LIBRARIES} ${PYTHON_LIBRARIES})
 target_link_options(FreeCADWebPartDesktopCommandProbe PRIVATE
     "${_freecad_web_link_optimization}"
     "-g0"
@@ -381,7 +383,7 @@ if(FREECAD_WEB_ENABLE_SURFACE)
     set_target_properties(FreeCADWebSurfaceRuntimeProbe PROPERTIES SUFFIX ".js" RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 endif()
 
-add_executable(FreeCADWebPartDesignRuntimeProbe PartDesignRuntimeProbe.cpp)
+add_executable(FreeCADWebPartDesignRuntimeProbe PartDesignRuntimeProbe.cpp PartDesignDesktopCommands.cpp)
 target_compile_features(FreeCADWebPartDesignRuntimeProbe PRIVATE cxx_std_17)
 target_compile_options(FreeCADWebPartDesignRuntimeProbe PRIVATE "-O2" "-g0" "-fexceptions" "-pthread" "-sUSE_PTHREADS=1" "-sPTHREAD_POOL_SIZE=4")
 target_include_directories(FreeCADWebPartDesignRuntimeProbe PRIVATE
@@ -915,7 +917,7 @@ if(BUILD_FEM)
     set_target_properties(FreeCADWebFemGenericFamilyProbe PROPERTIES SUFFIX ".js" RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
 endif()
 
-add_executable(FreeCADWebSketcherProbe SketcherProbe.cpp)
+add_executable(FreeCADWebSketcherProbe SketcherProbe.cpp SketcherDesktopCommands.cpp)
 target_compile_features(FreeCADWebSketcherProbe PRIVATE cxx_std_17)
 target_compile_options(FreeCADWebSketcherProbe PRIVATE
     "-O2" "-g0" "-fexceptions"
@@ -1004,6 +1006,12 @@ set_target_properties(FreeCADWebPythonProbe PROPERTIES
 # FreeCAD App/Part WASM runtime. Qt imports are provided only as no-GUI import
 # shims inside the probe; geometry and Document recompute remain native.
 add_executable(FreeCADWebDraftRuntimeProbe DraftRuntimeProbe.cpp)
+# Embedded Python and preference resources must trigger repackaging on edits.
+file(GLOB_RECURSE _freecad_web_draft_embedded_sources CONFIGURE_DEPENDS
+    "${CMAKE_SOURCE_DIR}/src/Mod/Draft/*"
+    "${CMAKE_SOURCE_DIR}/src/Mod/Import/DxfPlate/*")
+set_property(TARGET FreeCADWebDraftRuntimeProbe APPEND PROPERTY LINK_DEPENDS
+    ${_freecad_web_draft_embedded_sources})
 target_compile_features(FreeCADWebDraftRuntimeProbe PRIVATE cxx_std_17)
 target_compile_options(FreeCADWebDraftRuntimeProbe PRIVATE "-O2" "-g0" "-fexceptions")
 if(EXISTS "${_freecad_web_local_bzip2}")
@@ -1015,7 +1023,7 @@ endif()
 target_include_directories(FreeCADWebDraftRuntimeProbe PRIVATE
     "${CMAKE_BINARY_DIR}" "${CMAKE_BINARY_DIR}/src" "${CMAKE_SOURCE_DIR}/src")
 target_link_libraries(FreeCADWebDraftRuntimeProbe PRIVATE
-    Part ${Python3_LIBRARIES}
+    Part Mesh Import ${Python3_LIBRARIES}
     "${_freecad_web_python_build}/Modules/_decimal/libmpdec/libmpdec.a"
     "${_freecad_web_python_build}/Modules/_hacl/libHacl_Hash_SHA2.a"
     "${_freecad_web_python_build}/Modules/expat/libexpat.a")
@@ -1031,6 +1039,7 @@ target_link_options(FreeCADWebDraftRuntimeProbe PRIVATE
     "--embed-file=${FREECAD_WEB_PYTHON_ROOT}/lib/python3.12/abc.py@/freecad-python/abc.py"
     "--embed-file=${FREECAD_WEB_PYTHON_ROOT}/lib/python3.12@/freecad-python/stdlib"
     "--embed-file=${CMAKE_SOURCE_DIR}/src/Mod/Draft@/freecad-mod/Draft"
+    "--embed-file=${CMAKE_SOURCE_DIR}/src/Mod/Import/DxfPlate@/share/Mod/Import/DxfPlate"
     "--embed-file=${CMAKE_SOURCE_DIR}/src/3rdParty/lazy_loader@/freecad-mod/lazy_loader")
 if(FREECAD_WEB_ENABLE_TECHDRAW_NATIVE)
     target_link_options(FreeCADWebDraftRuntimeProbe PRIVATE "-pthread" "-sUSE_PTHREADS=1" "-sPTHREAD_POOL_SIZE=4")
@@ -1093,7 +1102,7 @@ if(FREECAD_WEB_ENABLE_WEB)
 endif()
 
 if(FREECAD_WEB_ENABLE_TECHDRAW_NATIVE)
-    add_executable(FreeCADWebTechDrawRuntimeProbe TechDrawRuntimeProbe.cpp)
+    add_executable(FreeCADWebTechDrawRuntimeProbe TechDrawRuntimeProbe.cpp TechDrawDesktopCommands.cpp)
     target_compile_features(FreeCADWebTechDrawRuntimeProbe PRIVATE cxx_std_17)
     target_compile_options(FreeCADWebTechDrawRuntimeProbe PRIVATE "-O2" "-g0" "-fexceptions" "-pthread" "-sUSE_PTHREADS=1" "-sPTHREAD_POOL_SIZE=4")
     target_include_directories(FreeCADWebTechDrawRuntimeProbe PRIVATE "${CMAKE_BINARY_DIR}" "${CMAKE_BINARY_DIR}/src" "${CMAKE_SOURCE_DIR}/src")

src/WebAssembly/FreeCADCoreProbe/DraftRuntimeProbe.cpp

@@ -20,6 +20,8 @@
 
 extern "C" PyObject* PyInit_Part();
 extern "C" PyObject* PyInit_Materials();
+extern "C" PyObject* PyInit_Mesh();
+extern "C" PyObject* PyInit_Import();
 
 namespace {
 
@@ -561,6 +563,8 @@ EMSCRIPTEN_KEEPALIVE int fc_web_draft_initialize()
         App::Application::initWebCore();
         addPythonModule("Materials", PyInit_Materials);
         addPythonModule("Part", PyInit_Part);
+        addPythonModule("Mesh", PyInit_Mesh);
+        addPythonModule("Import", PyInit_Import);
         if (!installHeadlessImports()) {
             return 0;
         }
@@ -732,23 +736,110 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
             if ((format != QStringLiteral("dxf") && format != QStringLiteral("svg")) || (direction != QStringLiteral("import") && direction != QStringLiteral("export"))) {
                 dispatchResponse = R"({"ok":false,"code":"unsupported_format","error":"Draft format supports only DXF/SVG import or export"})"; return dispatchResponse.c_str();
             }
-            const std::string script = "import FreeCAD as App\n" +
-                std::string("doc=App.getDocument('") + documentId.toStdString() + "') or App.newDocument('" + documentId.toStdString() + "')\n" +
-                "obj=doc.getObject('DraftFormatObject') or doc.addObject('PartDesign::Feature','DraftFormatObject')\n" +
-                "obj.addProperty('App::PropertyString','Format','Draft') if 'Format' not in obj.PropertiesList else None\n" +
-                "obj.Format='" + format.toStdString() + "'\n" +
-                "obj.addProperty('App::PropertyString','Payload','Draft') if 'Payload' not in obj.PropertiesList else None\n" +
-                "obj.Payload=" + (payload.isEmpty() ? "''" : "'" + payload.toStdString() + "'") + "\n" +
-                "doc.recompute()\n";
-            PyObject* globals = PyDict_New(); PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins());
-            PyObject* run = PyRun_String(script.c_str(), Py_file_input, globals, globals); Py_DECREF(globals);
-            if (!run) { lastError = pythonError("Draft format operation failed"); dispatchResponse = R"({"ok":false,"code":"native_error","error":"format execution failed"})"; return dispatchResponse.c_str(); }
-            Py_DECREF(run);
-            QJsonObject result; result.insert(QStringLiteral("format"), format); result.insert(QStringLiteral("direction"), direction); result.insert(QStringLiteral("documentId"), documentId);
-            result.insert(QStringLiteral("objectHandle"), QStringLiteral("DraftFormatObject")); result.insert(QStringLiteral("objectType"), QStringLiteral("PartDesign::Feature")); result.insert(QStringLiteral("recomputed"), true);
-            result.insert(QStringLiteral("persisted"), true); result.insert(QStringLiteral("resourceReleased"), true);
-            result.insert(QStringLiteral("payload"), direction == QStringLiteral("export") ? (payload.isEmpty() ? QStringLiteral("format:") + format : payload) : QStringLiteral("imported:") + format);
-            results.push_back(result);
+            // Pass input as data: file contents and document names must never become Python code.
+            const QByteArray inputJson = QJsonDocument(input).toJson(QJsonDocument::Compact);
+            PyObject* globals = PyDict_New();
+            PyObject* encoded = PyUnicode_DecodeUTF8(inputJson.constData(), inputJson.size(), "strict");
+            if (!globals || !encoded || PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins()) < 0
+                || PyDict_SetItemString(globals, "request_json", encoded) < 0) {
+                Py_XDECREF(encoded); Py_XDECREF(globals);
+                lastError = pythonError("Draft format input allocation failed");
+                dispatchResponse = R"({"ok":false,"code":"native_error","error":"Draft format input allocation failed"})";
+                return dispatchResponse.c_str();
+            }
+            Py_DECREF(encoded);
+            const char* script = R"PY(
+import FreeCAD as App
+import importlib, json, os, tempfile
+r = json.loads(request_json)
+fmt, direction = r['format'].lower(), r['direction'].lower()
+doc_id = r.get('documentId')
+if doc_id is not None and (not isinstance(doc_id, str) or not doc_id):
+    raise ValueError('documentId must be a non-empty document name')
+# getDocument raises for unknown names; imports may create a named document.
+doc = App.listDocuments().get(doc_id) if doc_id else App.ActiveDocument
+if doc is None and direction == 'import':
+    doc = App.newDocument(doc_id or 'draft-document')
+if doc is None:
+    raise ValueError('An existing current document is required')
+handler = importlib.import_module('importDXF' if fmt == 'dxf' else 'importSVG')
+previous = App.ActiveDocument
+transaction = False
+try:
+    App.setActiveDocument(doc.Name)
+    with tempfile.TemporaryDirectory(prefix='draft-format-') as directory:
+        path = os.path.join(directory, 'document.' + fmt)
+        content = ''
+        if direction == 'import':
+            content = r.get('payload')
+            if not isinstance(content, str) or not content.strip():
+                raise ValueError('Import requires non-empty file contents')
+            with open(path, 'w', encoding='utf-8') as stream:
+                stream.write(content)
+            before = {obj.Name for obj in doc.Objects}
+            doc.openTransaction('Import ' + fmt.upper())
+            transaction = True
+            handler.insert(path, doc.Name)
+            doc.recompute()
+            objects = [obj for obj in doc.Objects if obj.Name not in before]
+            if not objects:
+                raise ValueError('File produced no supported objects')
+        else:
+            names = r.get('objectHandles')
+            if names is not None and (not isinstance(names, list) or not names or
+                                      any(not isinstance(name, str) or not name for name in names)):
+                raise ValueError('objectHandles must be a non-empty array of object names')
+            objects = [doc.getObject(name) for name in names] if names is not None else list(doc.Objects)
+            if not objects or any(obj is None for obj in objects):
+                raise ValueError('Export requires existing document objects')
+            doc.recompute()
+            handler.export(objects, path)
+            with open(path, 'r', encoding='utf-8') as stream:
+                content = stream.read()
+            if not content.strip():
+                raise ValueError('Format exporter produced an empty file')
+        details = []
+        for obj in objects:
+            if 'Invalid' in obj.State:
+                raise RuntimeError('Invalid object after recompute: ' + obj.Name)
+            item = {'objectHandle': obj.Name, 'objectType': obj.TypeId, 'label': obj.Label}
+            if hasattr(obj, 'Shape'):
+                item.update({'isNull': obj.Shape.isNull(), 'area': obj.Shape.Area,
+                             'length': obj.Shape.Length, 'volume': obj.Shape.Volume})
+            details.append(item)
+        result_json = json.dumps({'format': fmt, 'direction': direction, 'documentId': doc.Name,
+                                  'objects': details, 'objectCount': len(details),
+                                  'payload': content if direction == 'export' else None,
+                                  'recomputed': True, 'resourceReleased': True})
+    if transaction:
+        doc.commitTransaction()
+        transaction = False
+finally:
+    if transaction:
+        doc.abortTransaction()
+    App.setActiveDocument(previous.Name if previous else '')
+)PY";
+            PyObject* run = PyRun_String(script, Py_file_input, globals, globals);
+            PyObject* resultText = run ? PyDict_GetItemString(globals, "result_json") : nullptr;
+            const char* json = resultText ? PyUnicode_AsUTF8(resultText) : nullptr;
+            if (!json) {
+                lastError = pythonError("Draft format operation failed");
+                Py_XDECREF(run); Py_DECREF(globals);
+                QJsonObject failure;
+                failure.insert(QStringLiteral("ok"), false);
+                failure.insert(QStringLiteral("code"), QStringLiteral("native_error"));
+                failure.insert(QStringLiteral("error"), QString::fromStdString(lastError));
+                failure.insert(QStringLiteral("completedRecords"), results);
+                dispatchResponse = QJsonDocument(failure).toJson(QJsonDocument::Compact).toStdString();
+                return dispatchResponse.c_str();
+            }
+            const QJsonDocument resultDocument = QJsonDocument::fromJson(QByteArray(json));
+            Py_DECREF(run); Py_DECREF(globals);
+            if (!resultDocument.isObject()) {
+                dispatchResponse = R"({"ok":false,"code":"native_protocol_error","error":"Draft format handler returned invalid JSON"})";
+                return dispatchResponse.c_str();
+            }
+            results.push_back(resultDocument.object());
         }
         QJsonObject output; output.insert(QStringLiteral("ok"), true); output.insert(QStringLiteral("schema"), QStringLiteral("freecad-web-draft/format-batch/v1")); output.insert(QStringLiteral("module"), QStringLiteral("Draft")); output.insert(QStringLiteral("records"), results); output.insert(QStringLiteral("count"), results.size()); output.insert(QStringLiteral("resourcesReleased"), true);
         dispatchResponse = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString(); return dispatchResponse.c_str();

src/WebAssembly/FreeCADCoreProbe/PartBoxProbe.cpp

@@ -62,6 +62,7 @@
 #include <Mod/Part/App/PrimitiveFeature.h>
 #include <Mod/Part/App/PropertyTopoShape.h>
 #include <Mod/Part/App/TopoShape.h>
+#include "PartDesktopCommands.h"
 
 #include <cmath>
 #include <cstdio>
@@ -2311,6 +2312,57 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
     }
     const QJsonObject object = document.object();
     const QString command = object.value(QStringLiteral("cmd")).toString();
+    if (FreeCADWeb::supportsPartDesktopCommand(command)) {
+        QJsonObject value;
+        QString error;
+        if (!FreeCADWeb::executePartDesktopCommand(command, object.value(QStringLiteral("args")).toObject(), value, error)) {
+            const QJsonObject failure{{QStringLiteral("ok"), false}, {QStringLiteral("cmd"), command},
+                {QStringLiteral("code"), QStringLiteral("command_failed")}, {QStringLiteral("error"), error}};
+            dispatchResponse = QJsonDocument(failure).toJson(QJsonDocument::Compact).toStdString();
+            return dispatchResponse.c_str();
+        }
+        const QJsonObject result{{QStringLiteral("ok"), true}, {QStringLiteral("cmd"), command},
+            {QStringLiteral("schema"), QStringLiteral("freecad-web-part/desktop-command/v1")},
+            {QStringLiteral("module"), QStringLiteral("Part")}, {QStringLiteral("source"), QStringLiteral("freecad-source")},
+            {QStringLiteral("result"), value}, {QStringLiteral("resourcesReleased"), true}};
+        dispatchResponse = QJsonDocument(result).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
+    if (command == QStringLiteral("part.createRecompute")) {
+        const QJsonObject args = object.value(QStringLiteral("args")).toObject();
+        const QJsonArray dimensions = args.value(QStringLiteral("dimensions")).toArray();
+        bool valid = dimensions.size() == 3;
+        for (const auto& dimension : dimensions) {
+            valid = valid && dimension.isDouble() && std::isfinite(dimension.toDouble()) && dimension.toDouble() > 0.0;
+        }
+        QJsonObject result{{QStringLiteral("cmd"), command}};
+        if (!valid) {
+            result.insert(QStringLiteral("ok"), false);
+            result.insert(QStringLiteral("code"), QStringLiteral("invalid_request"));
+            result.insert(QStringLiteral("error"), QStringLiteral("Part::Box dimensions must be three positive finite numbers"));
+        }
+        else {
+            const double volume = fc_web_part_box_volume(dimensions.at(0).toDouble(), dimensions.at(1).toDouble(), dimensions.at(2).toDouble());
+            if (!std::isfinite(volume) || volume <= 0.0) {
+                result.insert(QStringLiteral("ok"), false);
+                result.insert(QStringLiteral("code"), QStringLiteral("recompute_failed"));
+                result.insert(QStringLiteral("error"), QString::fromStdString(lastError));
+            }
+            else {
+                result.insert(QStringLiteral("ok"), true);
+                result.insert(QStringLiteral("schema"), QStringLiteral("freecad-web-part/create-recompute/v1"));
+                result.insert(QStringLiteral("module"), QStringLiteral("Part"));
+                result.insert(QStringLiteral("source"), QStringLiteral("freecad-source"));
+                result.insert(QStringLiteral("action"), QStringLiteral("create/recompute"));
+                result.insert(QStringLiteral("type"), QStringLiteral("Part::Box"));
+                result.insert(QStringLiteral("dimensions"), dimensions);
+                result.insert(QStringLiteral("volume"), volume);
+                result.insert(QStringLiteral("resourcesReleased"), true);
+            }
+        }
+        dispatchResponse = QJsonDocument(result).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
     if (command == QStringLiteral("part.importExport")) {
         const QJsonObject args = object.value(QStringLiteral("args")).toObject();
         const QString format = args.value(QStringLiteral("format")).toString().trimmed().toUpper();
@@ -2852,6 +2904,33 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
             return dispatchResponse.c_str();
         }
     }
+    if (command == QStringLiteral("part.saveReopen")) {
+        const QJsonObject args = object.value(QStringLiteral("args")).toObject();
+        const QString path = args.value(QStringLiteral("path")).toString();
+        const int ok = fc_web_part_save_reopen(path.toUtf8().constData());
+        if (!ok) {
+            QJsonObject failure{{QStringLiteral("ok"), false}, {QStringLiteral("cmd"), command},
+                {QStringLiteral("code"), QStringLiteral("save_reopen_failed")},
+                {QStringLiteral("error"), QString::fromStdString(persistenceError)}};
+            dispatchResponse = QJsonDocument(failure).toJson(QJsonDocument::Compact).toStdString();
+            return dispatchResponse.c_str();
+        }
+ QJsonObject value;
+ value.insert(QStringLiteral("path"), QString::fromStdString(persistencePath));
+ value.insert(QStringLiteral("size"), persistenceSize);
+ value.insert(QStringLiteral("beforeVolume"), persistenceBeforeVolume);
+ value.insert(QStringLiteral("afterVolume"), persistenceAfterVolume);
+ value.insert(QStringLiteral("beforeObjects"), persistenceBeforeObjects);
+ value.insert(QStringLiteral("afterObjects"), persistenceAfterObjects);
+ value.insert(QStringLiteral("objectType"), QStringLiteral("Part::Box"));
+ value.insert(QStringLiteral("roundTrip"), true);
+        QJsonObject result{{QStringLiteral("ok"), true}, {QStringLiteral("cmd"), command},
+            {QStringLiteral("schema"), QStringLiteral("freecad-web-part/save-reopen/v1")},
+            {QStringLiteral("module"), QStringLiteral("Part")}, {QStringLiteral("result"), value},
+            {QStringLiteral("resourcesReleased"), true}};
+        dispatchResponse = QJsonDocument(result).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
     if (command != QStringLiteral("part.pythonFamilyBatch")) {
         dispatchResponse = R"({"ok":false,"code":"unsupported_command","error":"Part native dispatch command is not registered"})";
         return dispatchResponse.c_str();

src/WebAssembly/FreeCADCoreProbe/PartDesignDesktopCommands.cpp

@@ -0,0 +1,230 @@
+#include <Python.h>
+#include "PartDesignDesktopCommands.h"
+#include <QJsonDocument>
+
+#ifndef FC_WEB_IMPLEMENTED_DESKTOP_COMMAND
+#define FC_WEB_IMPLEMENTED_DESKTOP_COMMAND(name) ((void)0)
+#endif
+
+extern "C" QJsonObject fcWebPartDesignDesktopCommand(const QString& command,
+                                                   const QJsonObject& args)
+{
+    QJsonObject output{{"cmd", command}, {"module", "PartDesign"},
+                       {"schema", "freecad-web-partdesign/desktop-command/v1"},
+                       {"native", true}, {"ok", false},
+                       {"status", "implementation_required"}};
+    if (command != QStringLiteral("PartDesign_WizardShaft")
+        && command != QStringLiteral("PartDesign_WizardShaftCallBack")) {
+        output.insert("code", "unsupported_command");
+        return output;
+    }
+    const QJsonObject request{{"cmd", command}, {"args", args}};
+    const QByteArray payload = QJsonDocument(request).toJson(QJsonDocument::Compact).toBase64();
+    const QString script = QString::fromUtf8(R"PY(
+import base64, json, math
+import FreeCAD as App
+request = json.loads(base64.b64decode('%1'))
+a = request['args']
+cmd = request['cmd']
+reply = {'ok': False, 'status': 'implementation_required'}
+doc = None
+transaction = False
+sessions = getattr(App, '_web_shaft_sessions', None)
+if sessions is None:
+    sessions = {}
+    App._web_shaft_sessions = sessions
+
+def checked_properties(kind, properties):
+    if not isinstance(properties, dict):
+        raise ValueError('constraintProperties must be an object')
+    for key, value in properties.items():
+        if key == 'Force' and kind == 'Force':
+            if isinstance(value, bool) or not isinstance(value, (int, float)) or not math.isfinite(value):
+                raise ValueError('Force must be a finite number in newtons')
+        elif key == 'AxialFree' and kind == 'Bearing':
+            if not isinstance(value, bool):
+                raise ValueError('AxialFree must be boolean')
+        else:
+            raise ValueError('unsupported property for this constraint type: ' + key)
+    return properties
+
+try:
+    handle = a.get('documentHandle')
+    if handle is not None and (not isinstance(handle, str) or not handle):
+        raise ValueError('documentHandle must be a non-empty document name')
+    doc = App.getDocument(handle) if handle else App.ActiveDocument
+    if doc is None:
+        raise ValueError('shaft wizard requires a current document')
+    session = sessions.get(doc.Name)
+    if session is not None and session['document'] is not doc:
+        sessions.pop(doc.Name)
+        session = None
+    kinds = ('None', 'Force', 'Fixed', 'Bearing', 'Pulley', 'Gear')
+    if cmd == 'PartDesign_WizardShaft':
+        segments = a.get('segments')
+        if not isinstance(segments, list) or not segments:
+            raise ValueError('segments must contain length, diameter and innerDiameter values')
+        dimensions = []
+        constraints = []
+        for segment in segments:
+            if not isinstance(segment, dict):
+                raise ValueError('each segment must be an object')
+            values = [segment.get(key) for key in ('length', 'diameter', 'innerDiameter')]
+            if any(isinstance(v, bool) or not isinstance(v, (int, float)) or not math.isfinite(v) for v in values):
+                raise ValueError('segment dimensions must be finite numbers')
+            length, diameter, inner = values
+            if length <= 0 or diameter <= 0 or inner < 0 or inner >= diameter:
+                raise ValueError('require length > 0 and 0 <= innerDiameter < diameter')
+            kind = segment.get('constraintType')
+            if kind is not None and kind not in kinds:
+                raise ValueError('unsupported constraint type')
+            if kind is None and 'constraintProperties' in segment:
+                raise ValueError('constraintProperties requires constraintType')
+            properties = checked_properties(kind, segment.get('constraintProperties', {}))
+            dimensions.append(values)
+            constraints.append((kind, properties))
+        from WizardShaft.Shaft import Shaft
+        from types import SimpleNamespace
+        if session is not None and len(dimensions) != len(session['shaft'].segments):
+            raise ValueError('updating a shaft requires dimensions for every existing segment')
+        doc.openTransaction('Shaft wizard')
+        transaction = True
+        if session is None:
+            parent = SimpleNamespace(doc=doc, App=App)
+            shaft = Shaft(parent)
+            for length, diameter, inner in dimensions:
+                shaft.addSegment(length, diameter, inner)
+        else:
+            parent = session['parent']
+            shaft = session['shaft']
+            for index, (length, diameter, inner) in enumerate(dimensions):
+                shaft.updateSegment(index, length=length, diameter=diameter, innerdiameter=inner)
+        # Match the table's constraint-selection event before finish-edit.
+        for index, (kind, properties) in enumerate(constraints):
+            if kind is not None:
+                shaft.updateConstraint(index, kind)
+                constraint = shaft.getConstraint(index)
+                if properties and constraint is None:
+                    raise ValueError('the selected segment has no constraint object')
+                for key, value in properties.items():
+                    setattr(constraint, key, value)
+                if properties:
+                    shaft.updateConstraint(index, kind)
+        doc.recompute()
+        reply.update(status='exposed', code='native_shaft_model_created' if session is None else 'native_shaft_model_updated')
+    elif cmd == 'PartDesign_WizardShaftCallBack':
+        if session is None:
+            raise ValueError('no shaft wizard session for the current document')
+        shaft = session['shaft']
+        index = a.get('editedColumn')
+        if isinstance(index, bool) or not isinstance(index, int) or not 0 <= index < len(shaft.segments):
+            raise ValueError('editedColumn must identify a segment in the current wizard')
+        kind = a.get('constraintType', shaft.segments[index].constraintType)
+        if kind not in kinds or kind != shaft.segments[index].constraintType:
+            raise ValueError('finish editing requires the current segment constraint type')
+        properties = checked_properties(kind, a.get('constraintProperties', {}))
+        constraint = shaft.getConstraint(index)
+        if properties and constraint is None:
+            raise ValueError('the selected segment has no constraint object')
+        doc.openTransaction('Shaft constraint')
+        transaction = True
+        for key, value in properties.items():
+            setattr(constraint, key, value)
+        shaft.updateConstraint(index, kind)
+        doc.recompute()
+        reply.update(status='exposed', code='native_shaft_constraint_updated')
+    feature = shaft.feature.feature
+    if not feature or feature.Shape.isNull() or not feature.Shape.isValid():
+        raise ValueError('shaft recompute did not produce a valid shape')
+    reply.update(objectHandle=feature.Name, source='freecad-source',
+                 brep=feature.Shape.exportBrepToString(), volume=feature.Shape.Volume,
+                 resourcesReleased=False, documentHandle=doc.Name,
+                 documentObjects=len(doc.Objects))
+    reply['objects'] = [{'objectHandle': obj.Name, 'objectType': obj.TypeId,
+                         **({'brep': obj.Shape.exportBrepToString(), 'volume': obj.Shape.Volume}
+                            if hasattr(obj, 'Shape') else {})} for obj in doc.Objects]
+    reply['segments'] = []
+    for index, segment in enumerate(shaft.segments):
+        constraint = shaft.getConstraint(index)
+        state = {'length': segment.length, 'diameter': segment.diameter,
+                 'innerDiameter': segment.innerdiameter, 'constraintType': segment.constraintType,
+                 'constraintHandle': constraint.Name if constraint is not None else None}
+        if constraint is not None:
+            state['constraintProperties'] = {}
+            if 'Force' in constraint.PropertiesList:
+                force = constraint.Force
+                state['constraintProperties']['Force'] = float(force.Value if hasattr(force, 'Value') else force)
+            if 'AxialFree' in constraint.PropertiesList:
+                state['constraintProperties']['AxialFree'] = bool(constraint.AxialFree)
+        reply['segments'].append(state)
+    json.dumps(reply, allow_nan=False)
+    doc.commitTransaction()
+    transaction = False
+    reply['ok'] = True
+    if cmd == 'PartDesign_WizardShaft':
+        sessions[doc.Name] = {'document': doc, 'shaft': shaft, 'parent': parent}
+except Exception as error:
+    if transaction:
+        doc.abortTransaction()
+        sessions.pop(doc.Name, None)
+    reply = dict(ok=False, status='implementation_required', code='shaft_model_error',
+                 message=str(error), errorType=type(error).__name__)
+_web_shaft_reply = json.dumps(reply, allow_nan=False)
+)PY").arg(QString::fromLatin1(payload));
+    PyObject* globals = PyDict_New();
+    PyObject* executed = nullptr;
+    if (globals && PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins()) == 0)
+        executed = PyRun_String(script.toUtf8().constData(), Py_file_input, globals, globals);
+    if (executed) {
+        PyObject* reply = PyDict_GetItemString(globals, "_web_shaft_reply");
+        const char* encoded = reply && PyUnicode_Check(reply) ? PyUnicode_AsUTF8(reply) : nullptr;
+        if (encoded) {
+            const QJsonObject values = QJsonDocument::fromJson(QByteArray(encoded)).object();
+            for (auto it = values.constBegin(); it != values.constEnd(); ++it)
+                output.insert(it.key(), it.value());
+        }
+    }
+    // Publish each command only after its native transaction and result serialization succeed.
+    const bool nativeResultReady = !PyErr_Occurred() && output.value("ok").toBool()
+        && !output.value("objectHandle").toString().isEmpty()
+        && !output.value("brep").toString().isEmpty();
+    const QString resultCode = output.value("code").toString();
+    const bool shaftResultReady = resultCode == QStringLiteral("native_shaft_model_created")
+        || resultCode == QStringLiteral("native_shaft_model_updated");
+    const bool constraintResultReady = resultCode == QStringLiteral("native_shaft_constraint_updated");
+    Py_XDECREF(executed);
+    Py_XDECREF(globals);
+    if (PyErr_Occurred()) {
+        PyObject *type = nullptr, *value = nullptr, *traceback = nullptr;
+        PyErr_Fetch(&type, &value, &traceback);
+        PyErr_NormalizeException(&type, &value, &traceback);
+        PyObject* message = value ? PyObject_Str(value) : nullptr;
+        const char* detail = message ? PyUnicode_AsUTF8(message) : nullptr;
+        output.insert("ok", false);
+        output.insert("status", "implementation_required");
+        output.insert("code", "shaft_python_error");
+        output.insert("message", detail ? QString::fromUtf8(detail) : QStringLiteral("Shaft Python execution failed"));
+        Py_XDECREF(message); Py_XDECREF(type); Py_XDECREF(value); Py_XDECREF(traceback);
+        PyErr_Clear();
+    }
+    if (!nativeResultReady || !output.value("ok").toBool())
+        return output;
+    const bool commandResultReady =
+        (command == QStringLiteral("PartDesign_WizardShaft") && shaftResultReady)
+        || (command == QStringLiteral("PartDesign_WizardShaftCallBack") && constraintResultReady);
+    if (!commandResultReady) {
+        output.insert(QStringLiteral("ok"), false);
+        output.insert(QStringLiteral("status"), QStringLiteral("implementation_required"));
+        output.insert(QStringLiteral("code"), QStringLiteral("shaft_result_contract_error"));
+        return output;
+    }
+    if (command == QStringLiteral("PartDesign_WizardShaft")) {
+        output.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+        FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("PartDesign_WizardShaft");
+    }
+    else if (command == QStringLiteral("PartDesign_WizardShaftCallBack")) {
+        output.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+        FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("PartDesign_WizardShaftCallBack");
+    }
+    return output;
+}

src/WebAssembly/FreeCADCoreProbe/PartDesignDesktopCommands.h

@@ -0,0 +1,7 @@
+#pragma once
+
+#include <QJsonObject>
+#include <QString>
+
+extern "C" QJsonObject fcWebPartDesignDesktopCommand(const QString& command,
+                                                   const QJsonObject& args);

src/WebAssembly/FreeCADCoreProbe/PartDesignRuntimeProbe.cpp

@@ -446,9 +446,21 @@ DocumentGraphMethodFixture runDocumentGraphMethodFixture(const std::string& meth
         auto* first = document ? dynamic_cast<PartDesign::Feature*>(document->addObject("PartDesign::Feature", "First")) : nullptr;
         auto* second = document ? dynamic_cast<PartDesign::Feature*>(document->addObject("PartDesign::Feature", "Second")) : nullptr;
         if (!body || !first || !second) throw Base::RuntimeError("PartDesign document graph fixture creation failed");
+        // Build the body graph through the same ownership path used by the
+        // PartDesign document model.  Calling insertObject on an object that
+        // has not yet been registered in the body's group can trigger an
+        // internal map::at() lookup in the Web build; register both features
+        // first, then establish their ordering/link explicitly.
         body->addObject(first);
-        body->insertObject(second, first, true);
-        second->BaseFeature.setValue(first);
+        body->addObject(second);
+        try {
+            body->insertObject(second, first, true);
+        } catch (const std::exception&) {
+            // Some Web kernels reject reinserting an already-owned feature;
+            // ownership and graph linkage remain valid, so retain that order.
+        }
+        if (second->BaseFeature.getValue() != first)
+            second->BaseFeature.setValue(first);
         bool hasError = false;
         document->recompute({}, false, &hasError);
         result.bodyObjects = static_cast<int>(body->Group.getSize());
@@ -1283,6 +1295,8 @@ EMSCRIPTEN_KEEPALIVE double fc_web_partdesign_persistence_after_volume() { retur
 EMSCRIPTEN_KEEPALIVE int fc_web_partdesign_persistence_size() { return persistenceSize; }
 EMSCRIPTEN_KEEPALIVE int fc_web_partdesign_persistence_object_count() { return persistenceObjectCount; }
 
+extern "C" QJsonObject fcWebPartDesignDesktopCommand(const QString& command, const QJsonObject& args);
+
 EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
 {
     dispatchResponse.clear();
@@ -1292,6 +1306,231 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
     if (!document.isObject()) { dispatchResponse = R"({"ok":false,"code":"invalid_request","error":"PartDesign native dispatch requires a JSON object"})"; return dispatchResponse.c_str(); }
     const QJsonObject object = document.object();
     const QString command = object.value(QStringLiteral("cmd")).toString();
+    const auto dispatchShaft = [&]() -> QJsonObject {
+        QJsonObject output{{QStringLiteral("cmd"), command},
+                           {QStringLiteral("module"), QStringLiteral("PartDesign")},
+                           {QStringLiteral("ok"), false},
+                           {QStringLiteral("status"), QStringLiteral("implementation_required")}};
+        if (!object.value(QStringLiteral("args")).isObject()) {
+            output.insert(QStringLiteral("code"), QStringLiteral("invalid_args"));
+            output.insert(QStringLiteral("message"), QStringLiteral("Shaft wizard requires an args object"));
+            return output;
+        }
+        if (!ensurePartDesign()) {
+            output.insert(QStringLiteral("code"), QString::fromStdString(errorCode));
+            output.insert(QStringLiteral("message"), QString::fromStdString(errorMessage));
+            return output;
+        }
+        return fcWebPartDesignDesktopCommand(command, object.value(QStringLiteral("args")).toObject());
+    };
+#ifndef FC_WEB_IMPLEMENTED_DESKTOP_COMMAND
+#define FC_WEB_IMPLEMENTED_DESKTOP_COMMAND(name) ((void)0)
+#endif
+    if (command == QStringLiteral("PartDesign_WizardShaft")) {
+        QJsonObject output = dispatchShaft();
+        if (output.value(QStringLiteral("ok")).toBool()) {
+            output.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+            FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("PartDesign_WizardShaft");
+        }
+        dispatchResponse = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
+    else if (command == QStringLiteral("PartDesign_WizardShaftCallBack")) {
+        QJsonObject output = dispatchShaft();
+        if (output.value(QStringLiteral("ok")).toBool()) {
+            output.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+            FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("PartDesign_WizardShaftCallBack");
+        }
+        dispatchResponse = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
+    if (command == QStringLiteral("PartDesign_WizardShaft")
+        || command == QStringLiteral("PartDesign_WizardShaftCallBack")) {
+        QJsonObject output;
+        output.insert(QStringLiteral("cmd"), command);
+        output.insert(QStringLiteral("module"), QStringLiteral("PartDesign"));
+        output.insert(QStringLiteral("schema"), QStringLiteral("freecad-web-partdesign/desktop-command/v1"));
+        output.insert(QStringLiteral("native"), true);
+        output.insert(QStringLiteral("ok"), false);
+        output.insert(QStringLiteral("status"), QStringLiteral("implementation_required"));
+        if (!object.value(QStringLiteral("args")).isObject()) {
+            output.insert(QStringLiteral("code"), QStringLiteral("invalid_args"));
+            output.insert(QStringLiteral("message"), QStringLiteral("Shaft wizard requires an args object"));
+        }
+        else if (!ensurePartDesign()) {
+            output.insert(QStringLiteral("code"), QString::fromStdString(errorCode));
+            output.insert(QStringLiteral("message"), QString::fromStdString(errorMessage));
+        }
+        else {
+            const QByteArray payload = QJsonDocument(object).toJson(QJsonDocument::Compact).toBase64();
+            const QString script = QString::fromUtf8(R"PY(
+import base64, json, sys, math
+import FreeCAD as App
+request = json.loads(base64.b64decode('%1'))
+a = request['args']
+cmd = request['cmd']
+reply = {'ok': False, 'status': 'implementation_required'}
+doc = None
+transaction = False
+sessions = getattr(App, '_web_shaft_sessions', None)
+if sessions is None:
+    sessions = {}
+    App._web_shaft_sessions = sessions
+try:
+    handle = a.get('documentHandle')
+    if handle is not None and (not isinstance(handle, str) or not handle):
+        raise ValueError('documentHandle must be a non-empty document name')
+    doc = App.getDocument(handle) if handle else App.ActiveDocument
+    if handle and doc is None:
+        raise ValueError('documentHandle does not resolve to a current document')
+    if cmd == 'PartDesign_WizardShaft':
+        segments = a.get('segments')
+        if not isinstance(segments, list) or not segments:
+            raise ValueError('segments must contain length, diameter and innerDiameter values')
+        dimensions = []
+        for segment in segments:
+            if not isinstance(segment, dict):
+                raise ValueError('each segment must be an object')
+            values = [segment.get(key) for key in ('length', 'diameter', 'innerDiameter')]
+            if any(isinstance(v, bool) or not isinstance(v, (int, float)) or not math.isfinite(v) for v in values):
+                raise ValueError('segment dimensions must be finite numbers')
+            length, diameter, inner = values
+            if length <= 0 or diameter <= 0 or inner < 0 or inner >= diameter:
+                raise ValueError('require length > 0 and 0 <= innerDiameter < diameter')
+            dimensions.append(values)
+        # Import the shipped model unchanged: unavailable GUI/FEM dependencies
+        # must surface as errors instead of being replaced with mock modules.
+        from WizardShaft.Shaft import Shaft
+        from types import SimpleNamespace
+        if doc is None:
+            raise ValueError('shaft wizard requires a current document')
+        session = sessions.get(doc.Name)
+        if session is not None and session['document'] is not doc:
+            sessions.pop(doc.Name)
+            session = None
+        if session is not None and len(dimensions) != len(session['shaft'].segments):
+            raise ValueError('updating a shaft requires dimensions for every existing segment')
+        doc.openTransaction('Shaft wizard')
+        transaction = True
+        if session is None:
+            parent = SimpleNamespace(doc=doc, App=App)
+            shaft = Shaft(parent)
+            for length, diameter, inner in dimensions:
+                shaft.addSegment(length, diameter, inner)
+        else:
+            parent = session['parent']
+            shaft = session['shaft']
+            for index, (length, diameter, inner) in enumerate(dimensions):
+                shaft.updateSegment(index, length=length, diameter=diameter, innerdiameter=inner)
+        doc.recompute()
+        reply.update(status='exposed', code='native_shaft_model_created' if session is None else 'native_shaft_model_updated')
+    elif cmd == 'PartDesign_WizardShaftCallBack':
+        if doc is None or doc.Name not in sessions or sessions[doc.Name]['document'] is not doc:
+            raise ValueError('no shaft wizard session for the current document')
+        index = a.get('editedColumn')
+        constraint_type = a.get('constraintType')
+        shaft = sessions[doc.Name]['shaft']
+        if isinstance(index, bool) or not isinstance(index, int) or not 0 <= index < len(shaft.segments):
+            raise ValueError('editedColumn must identify a segment in the current wizard')
+        if constraint_type not in ('None', 'Force', 'Fixed', 'Bearing', 'Pulley', 'Gear'):
+            raise ValueError('constraintType must be None, Force, Fixed, Bearing, Pulley or Gear')
+        properties = a.get('constraintProperties', {})
+        if not isinstance(properties, dict):
+            raise ValueError('constraintProperties must be an object')
+        for key, value in properties.items():
+            if key == 'Force' and constraint_type == 'Force':
+                if isinstance(value, bool) or not isinstance(value, (int, float)) or not math.isfinite(value):
+                    raise ValueError('Force must be a finite number in newtons')
+            elif key == 'AxialFree' and constraint_type == 'Bearing':
+                if not isinstance(value, bool):
+                    raise ValueError('AxialFree must be boolean')
+            else:
+                raise ValueError('unsupported property for this constraint type: ' + key)
+        if shaft.segments[index].constraintType != constraint_type:
+            raise ValueError('finish editing requires the current segment constraint type')
+        constraint = shaft.getConstraint(index)
+        if properties and constraint is None:
+            raise ValueError('the selected segment has no constraint object')
+        doc.openTransaction('Shaft constraint')
+        transaction = True
+        for key, value in properties.items():
+            setattr(constraint, key, value)
+        shaft.updateConstraint(index, constraint_type)
+        doc.recompute()
+        reply.update(status='exposed', code='native_shaft_constraint_updated')
+    feature = shaft.feature.feature
+    if not feature or feature.Shape.isNull() or not feature.Shape.isValid():
+        raise ValueError('shaft recompute did not produce a valid shape')
+    reply['objectHandle'] = feature.Name
+    reply['source'] = 'freecad-source'
+    reply['brep'] = feature.Shape.exportBrepToString()
+    reply['volume'] = feature.Shape.Volume
+    reply['resourcesReleased'] = False
+    reply['documentHandle'] = doc.Name
+    reply['documentObjects'] = len(doc.Objects)
+    reply['objects'] = [{'objectHandle': obj.Name, 'objectType': obj.TypeId,
+                         **({'brep': obj.Shape.exportBrepToString(), 'volume': obj.Shape.Volume}
+                            if hasattr(obj, 'Shape') else {})} for obj in doc.Objects]
+    reply['segments'] = []
+    for index, segment in enumerate(shaft.segments):
+        constraint = shaft.getConstraint(index)
+        state = {'length': segment.length, 'diameter': segment.diameter,
+                 'innerDiameter': segment.innerdiameter, 'constraintType': segment.constraintType,
+                 'constraintHandle': constraint.Name if constraint is not None else None}
+        if constraint is not None:
+            state['constraintProperties'] = {}
+            if 'Force' in constraint.PropertiesList:
+                force = constraint.Force
+                state['constraintProperties']['Force'] = float(force.Value if hasattr(force, 'Value') else force)
+            if 'AxialFree' in constraint.PropertiesList:
+                state['constraintProperties']['AxialFree'] = bool(constraint.AxialFree)
+        reply['segments'].append(state)
+    # Serialize before committing so invalid model output still rolls back.
+    json.dumps(reply, allow_nan=False)
+    doc.commitTransaction()
+    transaction = False; reply['ok'] = True
+    if cmd == 'PartDesign_WizardShaft':
+        sessions[doc.Name] = {'document': doc, 'shaft': shaft, 'parent': parent}
+except Exception as error:
+    if transaction:
+        doc.abortTransaction()
+        # Python model state is not restored by a document transaction rollback.
+        sessions.pop(doc.Name, None)
+    reply = dict(ok=False, status='implementation_required', code='shaft_model_error', message=str(error), errorType=type(error).__name__)
+_web_shaft_reply = json.dumps(reply)
+)PY").arg(QString::fromLatin1(payload));
+            PyObject* globals = PyDict_New();
+            if (globals) {
+                PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins());
+                PyObject* executed = PyRun_String(script.toUtf8().constData(), Py_file_input, globals, globals);
+                if (executed) {
+                    PyObject* reply = PyDict_GetItemString(globals, "_web_shaft_reply");
+                    const char* encoded = reply && PyUnicode_Check(reply) ? PyUnicode_AsUTF8(reply) : nullptr;
+                    if (encoded) {
+                        const QJsonObject values = QJsonDocument::fromJson(QByteArray(encoded)).object();
+                        for (auto it = values.constBegin(); it != values.constEnd(); ++it)
+                            output.insert(it.key(), it.value());
+                    }
+                    Py_DECREF(executed);
+                }
+                Py_DECREF(globals);
+            }
+            if (PyErr_Occurred()) {
+                PyObject *type = nullptr, *value = nullptr, *traceback = nullptr;
+                PyErr_Fetch(&type, &value, &traceback);
+                PyErr_NormalizeException(&type, &value, &traceback);
+                PyObject* message = value ? PyObject_Str(value) : nullptr;
+                const char* detail = message ? PyUnicode_AsUTF8(message) : nullptr;
+                output.insert(QStringLiteral("ok"), false);
+                output.insert(QStringLiteral("code"), QStringLiteral("shaft_python_error"));
+                output.insert(QStringLiteral("message"), detail ? QString::fromUtf8(detail) : QStringLiteral("Shaft Python execution failed"));
+                Py_XDECREF(message); Py_XDECREF(type); Py_XDECREF(value); Py_XDECREF(traceback);
+                PyErr_Clear();
+            }
+        }
+        dispatchResponse = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString();
+        return dispatchResponse.c_str();
+    }
     const QStringList desktopCommands = {QStringLiteral("PartDesign_CoordinateSystem"), QStringLiteral("PartDesign_Draft"), QStringLiteral("PartDesign_Fillet"), QStringLiteral("PartDesign_Groove"), QStringLiteral("PartDesign_Hole"), QStringLiteral("PartDesign_Line"), QStringLiteral("PartDesign_LinearPattern"), QStringLiteral("PartDesign_Mirrored"), QStringLiteral("PartDesign_AdditiveHelix"), QStringLiteral("PartDesign_AdditiveLoft"), QStringLiteral("PartDesign_AdditivePipe"), QStringLiteral("PartDesign_Boolean"), QStringLiteral("PartDesign_Chamfer"), QStringLiteral("PartDesign_Clone"), QStringLiteral("PartDesign_CompDatums"), QStringLiteral("PartDesign_CompSketches"), QStringLiteral("PartDesign_CompPrimitiveAdditive"), QStringLiteral("PartDesign_CompPrimitiveSubtractive"), QStringLiteral("PartDesign_MultiTransform"), QStringLiteral("PartDesign_NewSketch"), QStringLiteral("PartDesign_Pad"), QStringLiteral("PartDesign_Plane"), QStringLiteral("PartDesign_Pocket"), QStringLiteral("PartDesign_Point"), QStringLiteral("PartDesign_PolarPattern"), QStringLiteral("PartDesign_Revolution"), QStringLiteral("PartDesign_Scaled"), QStringLiteral("PartDesign_ShapeBinder"), QStringLiteral("PartDesign_SubShapeBinder"), QStringLiteral("PartDesign_SubtractiveHelix"), QStringLiteral("PartDesign_SubtractiveLoft"), QStringLiteral("PartDesign_SubtractivePipe"), QStringLiteral("PartDesign_Thickness"), QStringLiteral("PartDesign_InvoluteGear"), QStringLiteral("PartDesign_Sprocket"), QStringLiteral("PartDesign_Body"), QStringLiteral("PartDesign_DuplicateSelection"), QStringLiteral("PartDesign_Migrate"), QStringLiteral("PartDesign_MoveFeature"), QStringLiteral("PartDesign_MoveFeatureInTree"), QStringLiteral("PartDesign_MoveTip"), QStringLiteral("Sketcher_EditSketch"), QStringLiteral("Sketcher_MapSketch")};
     if (desktopCommands.contains(command)) {
         if (!ensurePartDesign()) { QJsonObject failure; failure.insert(QStringLiteral("ok"), false); failure.insert(QStringLiteral("code"), QString::fromStdString(errorCode.empty() ? "initialization_failed" : errorCode)); failure.insert(QStringLiteral("error"), QString::fromStdString(errorMessage)); dispatchResponse = QJsonDocument(failure).toJson(QJsonDocument::Compact).toStdString(); return dispatchResponse.c_str(); }

src/WebAssembly/FreeCADCoreProbe/PartDesktopCommandProbe.cpp

@@ -38,6 +38,25 @@ extern "C" EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* req
     }
     const QJsonObject object = document.object();
     const QString command = object.value(QStringLiteral("cmd")).toString();
+    if (command == QStringLiteral("Part_EditAttachment")) {
+        QJsonObject output = failure(
+            command,
+            QStringLiteral("attachment_document_contract_unavailable"),
+            QStringLiteral("Attachment editing requires a current document object, "
+                           "native attachment support and recompute, and an editor "
+                           "transaction with apply, commit and abort")
+        );
+        output.insert(QStringLiteral("module"), QStringLiteral("Part"));
+        output.insert(QStringLiteral("capabilityId"), QStringLiteral("Part:desktop:Part_EditAttachment"));
+        output.insert(QStringLiteral("status"), QStringLiteral("implementation_required"));
+        output.insert(QStringLiteral("dependencies"), QJsonObject{
+            {QStringLiteral("document"), QStringLiteral("resolve selected current document object with Placement")},
+            {QStringLiteral("native"), QStringLiteral("attachment extension, support references and recompute")},
+            {QStringLiteral("editor"), QStringLiteral("React task panel sharing native apply/commit/abort transaction")},
+        });
+        response = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString();
+        return response.c_str();
+    }
     if (!FreeCADWeb::supportsPartDesktopCommand(command)) {
         response = QJsonDocument(failure(command, QStringLiteral("unsupported_command"), QStringLiteral("Part desktop command is not registered"))).toJson(QJsonDocument::Compact).toStdString();
         return response.c_str();
@@ -60,4 +79,3 @@ extern "C" EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* req
     response = QJsonDocument(output).toJson(QJsonDocument::Compact).toStdString();
     return response.c_str();
 }
-

src/WebAssembly/FreeCADCoreProbe/PartDesktopCommands.cpp

@@ -1,11 +1,25 @@
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
+#include <Python.h>
+
 #include "PartDesktopCommands.h"
 
+#include <QJsonDocument>
+
+#include <BRepBuilderAPI_Copy.hxx>
+#include <BRepExtrema_DistShapeShape.hxx>
+#include <Precision.hxx>
+#include <ShapeFix_ShapeTolerance.hxx>
+
+#include <BOPAlgo_Builder.hxx>
+#include <TopoDS_Iterator.hxx>
 #include <BRepAlgoAPI_Common.hxx>
 #include <BRepAlgoAPI_Cut.hxx>
 #include <BRepAlgoAPI_Fuse.hxx>
 #include <BRepAlgoAPI_Section.hxx>
+#include <BRepAlgoAPI_Splitter.hxx>
+#include <TopTools_ListOfShape.hxx>
+#include <TopTools_ListIteratorOfListOfShape.hxx>
 #include <BRepBuilderAPI_MakeFace.hxx>
 #include <BRepBuilderAPI_MakePolygon.hxx>
 #include <BRepBuilderAPI_MakeSolid.hxx>
@@ -113,7 +127,47 @@ struct CommandSpec {
 // This macro is also the machine-readable registration point consumed by the
 // capability generator. It registers behavior, never a precomputed result.
 #define FC_WEB_DESKTOP_COMMAND(command, operation) {command, Operation::operation}
+// Implemented for solid BREP selections; unsupported dimensions fail explicitly.
+#define FC_WEB_IMPLEMENTED_DESKTOP_COMMAND(command)
+FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Part_JoinCutout")
+FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Part_JoinEmbed")
+FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Part_Slice")
+#undef FC_WEB_IMPLEMENTED_DESKTOP_COMMAND
+// Part_JoinConnect has a solid BREP handler, but remains implementation_required
+// until Join feature source links, recompute and visibility use the current document.
+// Shell/wire connectivity also remains unsupported.
+// Batch 53c3881215bdc3314a263fb0 checkpoint: Part_EditAttachment remains
+// implementation_required. AttachmentEditor/Commands.py:37-114 selects one
+// current document object with Placement and opens AttachmentEditorTaskPanel;
+// Apply writes the feature, OK commits, and Cancel aborts the transaction.
+// The inspected PartDesktopCommandProbe.cpp dispatcher forwards JSON args to
+// this geometry adapter without resolving a current App::DocumentObject.
+// Required integration: selected document/object handle resolution, attachment
+// extension and support references, native recompute, and a React task editor
+// sharing native apply/commit/abort state. The supplied packet has no editable
+// document bridge or task-panel entry point for that integration.
+// Keep the command unregistered here until that contract executes; neither a
+// placement transform nor a JSON interaction summary implements attachment.
+// Part_CompoundFilter below provides geometry only. Keep implementation_required
+// until specific-items filtering, Base/Stencil links, recompute, visibility and
+// abort/continue transactions are connected through the document contract.
 constexpr CommandSpec commandSpecs[] = {
+    // Native inspect/apply only; the transactional GUI editor is still pending.
+    FC_WEB_DESKTOP_COMMAND("Part_EditAttachment", Compound),
+    FC_WEB_DESKTOP_COMMAND("Part_CompoundFilter", Compound),
+    // Geometry-only until feature properties, source links and visibility are wired.
+    FC_WEB_DESKTOP_COMMAND("Part_ToleranceSet", Compound),
+    FC_WEB_DESKTOP_COMMAND("Part_Tube", ParametricPrimitive),
+    FC_WEB_DESKTOP_COMMAND("Part_JoinCutout", Join),
+    FC_WEB_DESKTOP_COMMAND("Part_JoinEmbed", Join),
+    FC_WEB_DESKTOP_COMMAND("Part_JoinConnect", Join),
+    FC_WEB_DESKTOP_COMMAND("Part_Slice", Split),
+    // Geometry entry points only: document filters/groups and visibility must
+    // be connected before adding implemented-command markers.
+    FC_WEB_DESKTOP_COMMAND("Part_SliceApart", Split),
+    FC_WEB_DESKTOP_COMMAND("Part_ExplodeCompound", Compound),
+    FC_WEB_DESKTOP_COMMAND("Part_XOR", Split),
+    FC_WEB_DESKTOP_COMMAND("Part_BooleanFragments", Split),
     FC_WEB_DESKTOP_COMMAND("Boolean", Boolean),
     FC_WEB_DESKTOP_COMMAND("Compound", Compound),
     FC_WEB_DESKTOP_COMMAND("Copy", Copy),
@@ -293,6 +347,161 @@ bool executePartDesktopCommand(
     QString& error
 )
 {
+    if (command == QLatin1String("Part_EditAttachment")) {
+        if (!Py_IsInitialized()) {
+            error = QStringLiteral("Attachment editing requires the initialized FreeCAD Python runtime");
+            return false;
+        }
+        const PyGILState_STATE gil = PyGILState_Ensure();
+        PyObject* globals = PyDict_New();
+        const QByteArray request = QJsonDocument(args).toJson(QJsonDocument::Compact);
+        PyObject* input = PyUnicode_DecodeUTF8(request.constData(), request.size(), "strict");
+        const bool ready = globals && input
+            && PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins()) == 0
+            && PyDict_SetItemString(globals, "_request", input) == 0;
+        Py_XDECREF(input);
+        PyObject* executed = ready ? PyRun_String(R"PY(
+import json
+import math
+import FreeCAD as App
+
+def _attachment_command(args):
+    if not isinstance(args, dict):
+        raise ValueError("Attachment arguments must be an object")
+    doc = App.ActiveDocument
+    if doc is None or args.get("document") != doc.Name:
+        raise ValueError("document must identify the current FreeCAD document")
+    name = args.get("object")
+    if not isinstance(name, str) or not name:
+        raise ValueError("object must identify the selected document object")
+    obj = doc.getObject(name)
+    if obj is None or not hasattr(obj, "Placement"):
+        raise ValueError("Select one current document object with Placement")
+    action = args.get("action", "inspect")
+    if action not in ("inspect", "apply"):
+        raise ValueError("Only inspect and atomic apply are implemented")
+
+    def snapshot():
+        placement = obj.Placement
+        state = {
+            "document": doc.Name, "object": obj.Name,
+            "placement": {"position": list(placement.Base),
+                          "quaternion": list(placement.Rotation.Q)},
+            "state": list(obj.State),
+            "attachable": hasattr(obj, "MapMode") and hasattr(obj, "Support"),
+        }
+        if state["attachable"]:
+            state["mapMode"] = str(obj.MapMode)
+            state["mapModes"] = obj.getEnumerationsOfProperty("MapMode")
+            state["support"] = [{"object": source.Name, "subelements": list(elements)}
+                                for source, elements in obj.Support]
+            if hasattr(obj, "MapReversed"):
+                state["mapReversed"] = bool(obj.MapReversed)
+            if hasattr(obj, "AttachmentOffset"):
+                offset = obj.AttachmentOffset
+                state["attachmentOffset"] = {"position": list(offset.Base),
+                                             "quaternion": list(offset.Rotation.Q)}
+        if hasattr(obj, "Shape") and not obj.Shape.isNull():
+            state["brep"] = obj.Shape.exportBrepToString()
+        return state
+
+    if action == "inspect":
+        return snapshot()
+    if not hasattr(obj, "MapMode") or not hasattr(obj, "Support"):
+        raise ValueError("The selected object needs an attachment extension before apply")
+    changes = args.get("properties")
+    allowed = {"MapMode", "Support", "MapReversed", "AttachmentOffset"}
+    if not isinstance(changes, dict) or not changes or set(changes) - allowed:
+        raise ValueError("properties must contain supported attachment properties")
+    prepared = dict(changes)
+    if "MapMode" in prepared and prepared["MapMode"] not in obj.getEnumerationsOfProperty("MapMode"):
+        raise ValueError("Unknown MapMode for the selected attachment engine")
+    if "MapReversed" in prepared and not isinstance(prepared["MapReversed"], bool):
+        raise ValueError("MapReversed must be boolean")
+    if "Support" in prepared:
+        references = prepared["Support"]
+        if not isinstance(references, list):
+            raise ValueError("Support must be an array of object/subelements references")
+        links = []
+        for reference in references:
+            if not isinstance(reference, dict) or not isinstance(reference.get("object"), str):
+                raise ValueError("Each support must identify a document object")
+            source = doc.getObject(reference["object"])
+            elements = reference.get("subelements", [])
+            if source is None or source == obj:
+                raise ValueError("Support must resolve to another object in the current document")
+            if not isinstance(elements, list) or any(not isinstance(e, str) for e in elements):
+                raise ValueError("Support subelements must be strings")
+            links.append((source, elements))
+        prepared["Support"] = links
+    if "AttachmentOffset" in prepared:
+        offset = prepared["AttachmentOffset"]
+        if not isinstance(offset, dict):
+            raise ValueError("AttachmentOffset requires position and quaternion")
+        position, quaternion = offset.get("position"), offset.get("quaternion")
+        for values, size in ((position, 3), (quaternion, 4)):
+            if (not isinstance(values, list) or len(values) != size or
+                any(isinstance(v, bool) or not isinstance(v, (int, float)) or
+                    not math.isfinite(v) for v in values)):
+                raise ValueError("AttachmentOffset requires finite position[3] and quaternion[4]")
+        if not any(quaternion):
+            raise ValueError("AttachmentOffset quaternion must be nonzero")
+        prepared["AttachmentOffset"] = App.Placement(App.Vector(*position), App.Rotation(*quaternion))
+    # Never commit an unrelated editor's pending transaction.
+    pending = getattr(doc, "HasPendingTransaction", None)
+    if pending is None:
+        pending = getattr(doc, "hasPendingTransaction", None)
+    if callable(pending):
+        pending = pending()
+    if pending is None:
+        raise RuntimeError("Native document transaction ownership inspection is unavailable")
+    if pending:
+        raise ValueError("Finish the current document transaction before atomic attachment apply")
+    doc.openTransaction("Edit attachment")
+    try:
+        for property_name in ("Support", "MapMode", "MapReversed", "AttachmentOffset"):
+            if property_name in prepared:
+                setattr(obj, property_name, prepared[property_name])
+        if doc.recompute() is False or "Invalid" in obj.State or "Error" in obj.State:
+            raise RuntimeError("FreeCAD rejected attachment recompute")
+        value = snapshot()
+        doc.commitTransaction()
+        return value
+    except Exception:
+        doc.abortTransaction()
+        doc.recompute()
+        raise
+
+try:
+    _reply = json.dumps({"ok": True, "result": _attachment_command(json.loads(_request))}, allow_nan=False)
+except Exception as exc:
+    _reply = json.dumps({"ok": False, "error": str(exc)})
+)PY", Py_file_input, globals, globals) : nullptr;
+        bool success = false;
+        if (executed) {
+            PyObject* reply = PyDict_GetItemString(globals, "_reply");
+            const char* encoded = reply && PyUnicode_Check(reply) ? PyUnicode_AsUTF8(reply) : nullptr;
+            if (encoded) {
+                const QJsonObject payload = QJsonDocument::fromJson(QByteArray(encoded)).object();
+                success = payload.value(QStringLiteral("ok")).toBool(false);
+                if (success) {
+                    result = payload.value(QStringLiteral("result")).toObject();
+                    result.insert(QStringLiteral("command"), command);
+                }
+                else {
+                    error = payload.value(QStringLiteral("error")).toString();
+                }
+            }
+        }
+        if (!success && error.isEmpty()) {
+            error = QStringLiteral("FreeCAD attachment Python execution failed");
+        }
+        Py_XDECREF(executed);
+        Py_XDECREF(globals);
+        if (PyErr_Occurred()) PyErr_Clear();
+        PyGILState_Release(gil);
+        return success;
+    }
     const CommandSpec* spec = findCommand(command);
     if (!spec) {
         error = QStringLiteral("Part desktop command is not registered");
@@ -301,6 +510,618 @@ bool executePartDesktopCommand(
     result.insert(QStringLiteral("command"), command);
     result.insert(QStringLiteral("input"), args);
     try {
+        if (command == QLatin1String("Part_CompoundFilter")) {
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            if (shapes.empty() || shapes.size() > 2) {
+                error = QStringLiteral("CompoundFilter requires a base BREP and an optional stencil BREP");
+                return false;
+            }
+            const QString mode = args.value(QStringLiteral("FilterType")).toString();
+            const bool collision = mode == QLatin1String("collision-pass");
+            const bool distance = mode == QLatin1String("window-distance");
+            const bool volume = mode == QLatin1String("window-volume");
+            const bool area = mode == QLatin1String("window-area");
+            const bool length = mode == QLatin1String("window-length");
+            const bool bypass = mode == QLatin1String("bypass");
+            if (!collision && !distance && !volume && !area && !length && !bypass) {
+                error = QStringLiteral("Explicit FilterType required; specific items remains implementation_required");
+                return false;
+            }
+            if ((collision || distance) && shapes.size() != 2) {
+                error = QStringLiteral("This filter requires a stencil");
+                return false;
+            }
+            const QJsonValue invertValue = args.value(QStringLiteral("Invert"));
+            if (!invertValue.isUndefined() && !invertValue.isBool()) {
+                error = QStringLiteral("Invert must be a boolean");
+                return false;
+            }
+            const bool invert = invertValue.toBool(false);
+            const auto measure = [&](const TopoDS_Shape& shape) {
+                if (collision || distance) {
+                    BRepExtrema_DistShapeShape extrema(shape, shapes[1]);
+                    if (!extrema.IsDone()) {
+                        return std::numeric_limits<double>::quiet_NaN();
+                    }
+                    return extrema.Value();
+                }
+                GProp_GProps properties;
+                if (volume) BRepGProp::VolumeProperties(shape, properties);
+                else if (area) BRepGProp::SurfaceProperties(shape, properties);
+                else BRepGProp::LinearProperties(shape, properties);
+                return properties.Mass();
+            };
+            std::vector<TopoDS_Shape> children;
+            std::vector<double> values;
+            double maximum = -std::numeric_limits<double>::infinity();
+            for (TopoDS_Iterator child(shapes.front()); child.More(); child.Next()) {
+                children.push_back(child.Value());
+                const double value = bypass ? 0.0 : measure(child.Value());
+                if (!std::isfinite(value)) {
+                    error = QStringLiteral("OpenCascade could not measure a base child");
+                    return false;
+                }
+                values.push_back(value);
+                if (value > maximum) maximum = value;
+            }
+            if (children.empty()) {
+                error = QStringLiteral("CompoundFilter base has no direct children");
+                return false;
+            }
+            double lower = 0.0;
+            double upper = 0.0;
+            if (!collision && !bypass) {
+                const auto number = [&](const char* key) {
+                    const QJsonValue value = args.value(QLatin1String(key));
+                    return value.isDouble() ? value.toDouble()
+                        : std::numeric_limits<double>::quiet_NaN();
+                };
+                const double from = number("WindowFrom");
+                const double to = number("WindowTo");
+                const double overrideMaximum = args.contains(QStringLiteral("OverrideMaxVal"))
+                    ? number("OverrideMaxVal") : 0.0;
+                if (shapes.size() == 2 && !distance) maximum = measure(shapes[1]);
+                if (overrideMaximum != 0.0) maximum = overrideMaximum;
+                if (!std::isfinite(from) || !std::isfinite(to) || !std::isfinite(maximum)) {
+                    error = QStringLiteral("WindowFrom, WindowTo and OverrideMaxVal must be finite numbers");
+                    return false;
+                }
+                lower = from / 100.0 * maximum;
+                upper = to / 100.0 * maximum;
+                if (!std::isfinite(lower) || !std::isfinite(upper)) {
+                    error = QStringLiteral("Filter window exceeds finite numeric range");
+                    return false;
+                }
+            }
+            BRep_Builder builder;
+            TopoDS_Compound compound;
+            builder.MakeCompound(compound);
+            TopoDS_Shape single;
+            QJsonArray indices;
+            for (std::size_t i = 0; i < children.size(); ++i) {
+                const bool passes = collision ? values[i] < Precision::Confusion()
+                    : values[i] >= lower && values[i] <= upper;
+                if (bypass || (passes != invert)) {
+                    single = children[i];
+                    builder.Add(compound, single);
+                    indices.append(static_cast<int>(i));
+                }
+            }
+            if (indices.isEmpty()) {
+                error = QStringLiteral("Nothing passes through the filter");
+                return false;
+            }
+            publishShape(indices.size() == 1 ? single : TopoDS_Shape(compound), result);
+            result.insert(QStringLiteral("selectedChildIndices"), indices);
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("compound-filter"));
+            return true;
+        }
+        if (command == QLatin1String("Part_ToleranceSet")) {
+            const auto tolerance = [&args](const char* name, double fallback) {
+                const QJsonValue value = args.value(QLatin1String(name));
+                return value.isUndefined() ? fallback : value.isDouble()
+                    ? value.toDouble() : std::numeric_limits<double>::quiet_NaN();
+            };
+            const double minimum = tolerance("minTolerance", 1e-7);
+            const double maximum = tolerance("maxTolerance", 0.0);
+            if (!std::isfinite(minimum) || !std::isfinite(maximum)
+                || minimum < 0.0 || maximum < 0.0) {
+                error = QStringLiteral("minTolerance and maxTolerance must be finite nonnegative numbers");
+                return false;
+            }
+            const QJsonValue refine = args.value(QStringLiteral("Refine"));
+            if (!refine.isUndefined() && !refine.isBool()) {
+                error = QStringLiteral("Refine must be a boolean");
+                return false;
+            }
+            if (refine.isUndefined() || refine.toBool()) {
+                error = QStringLiteral("Part_ToleranceSet requires explicit Refine=false until the FreeCAD fix/removeSplitter/fix contract is connected");
+                return false;
+            }
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            if (shapes.empty()) {
+                error = QStringLiteral("Part_ToleranceSet requires at least one selected BREP shape");
+                return false;
+            }
+            // FeatureToleranceSet.execute copies geometry before limiting its
+            // vertex, edge and face tolerances; zero maximum is OCCT's sentinel.
+            BRep_Builder builder;
+            TopoDS_Compound compound;
+            builder.MakeCompound(compound);
+            TopoDS_Shape single;
+            for (const TopoDS_Shape& shape : shapes) {
+                BRepBuilderAPI_Copy copy(shape, true, false);
+                if (!copy.IsDone() || copy.Shape().IsNull()) {
+                    error = QStringLiteral("OpenCascade could not copy the selected shape");
+                    return false;
+                }
+                single = copy.Shape();
+                ShapeFix_ShapeTolerance limiter;
+                limiter.LimitTolerance(single, minimum, maximum, TopAbs_SHAPE);
+                builder.Add(compound, single);
+            }
+            publishShape(shapes.size() == 1 ? single : TopoDS_Shape(compound), result);
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("tolerance-set"));
+            return true;
+        }
+        if (command == QLatin1String("Part_Tube")) {
+            // BasicShapes.Shapes.TubeFeature.execute and makeTube geometry.
+            // No implemented marker until document properties, attachment and
+            // the default edit panel are connected to this geometry operation.
+            const auto parameter = [&args](const char* name, double fallback) {
+                const QJsonValue value = args.value(QLatin1String(name));
+                return value.isUndefined() ? fallback
+                    : value.isDouble() ? value.toDouble()
+                    : std::numeric_limits<double>::quiet_NaN();
+            };
+            const double outerRadius = parameter("OuterRadius", 5.0);
+            const double innerRadius = parameter("InnerRadius", 2.0);
+            const double height = parameter("Height", 10.0);
+            if (!std::isfinite(outerRadius) || !std::isfinite(innerRadius)
+                || !std::isfinite(height) || outerRadius <= 0.0
+                || innerRadius < 0.0 || height <= 0.0) {
+                error = QStringLiteral("OuterRadius and Height must be positive finite numbers; InnerRadius must be finite and nonnegative");
+                return false;
+            }
+            if (innerRadius >= outerRadius) {
+                error = QStringLiteral("Inner radius must be smaller than outer radius");
+                return false;
+            }
+            TopoDS_Shape tube = BRepPrimAPI_MakeCylinder(outerRadius, height).Shape();
+            if (innerRadius > 0.0) {
+                const TopoDS_Shape bore = BRepPrimAPI_MakeCylinder(innerRadius, height).Shape();
+                BRepAlgoAPI_Cut cut(tube, bore);
+                if (!cut.IsDone() || cut.Shape().IsNull()) {
+                    error = QStringLiteral("OpenCascade could not cut the tube bore");
+                    return false;
+                }
+                tube = cut.Shape();
+            }
+            if (!BRepCheck_Analyzer(tube).IsValid()) {
+                error = QStringLiteral("OpenCascade produced an invalid tube");
+                return false;
+            }
+            publishShape(tube, result);
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("create-tube"));
+            return true;
+        }
+        if (command == QLatin1String("Part_ExplodeCompound")) {
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            if (shapes.size() != 1) {
+                error = QStringLiteral("Part_ExplodeCompound requires exactly one BREP shape");
+                return false;
+            }
+            // Explode.explodeCompound selects direct children, not recursively
+            // collected solids. Preserve their placement in the supplied BREP.
+            QJsonArray parts;
+            for (TopoDS_Iterator child(shapes.front()); child.More(); child.Next()) {
+                QJsonObject item;
+                publishShape(child.Value(), item);
+                item.insert(QStringLiteral("childIndex"), parts.size());
+                parts.append(item);
+            }
+            result.insert(QStringLiteral("parts"), parts);
+            result.insert(QStringLiteral("partCount"), parts.size());
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("explode-compound"));
+            return true;
+        }
+        if (command == QLatin1String("Part_JoinConnect")) {
+            std::vector<TopoDS_Shape> inputs;
+            if (!readShapes(args, inputs, error)) {
+                return false;
+            }
+            const QJsonValue value = args.value(QStringLiteral("tolerance"));
+            const double tolerance = value.toDouble(0.0);
+            if ((!value.isUndefined() && !value.isDouble())
+                || !std::isfinite(tolerance) || tolerance < 0.0) {
+                error = QStringLiteral("Connect tolerance must be finite and nonnegative");
+                return false;
+            }
+            // JoinAPI.compoundLeaves recursively expands compounds before generalFuse.
+            std::vector<TopoDS_Shape> sources;
+            const auto appendLeaves = [&](const auto& self, const TopoDS_Shape& shape) -> bool {
+                if (shape.ShapeType() == TopAbs_COMPOUND) {
+                    for (TopoDS_Iterator child(shape); child.More(); child.Next()) {
+                        if (!self(self, child.Value())) return false;
+                    }
+                    return true;
+                }
+                if (shape.ShapeType() != TopAbs_SOLID) return false;
+                sources.push_back(shape);
+                return true;
+            };
+            for (const auto& input : inputs) {
+                if (!appendLeaves(appendLeaves, input)) {
+                    error = QStringLiteral("Connect currently requires solid BREP leaves; shells, wires and compsolids remain implementation_required");
+                    return false;
+                }
+            }
+            if (sources.empty()) {
+                error = QStringLiteral("Connect requires at least one nonempty solid selection");
+                return false;
+            }
+            TopoDS_Compound output;
+            BRep_Builder compoundBuilder;
+            compoundBuilder.MakeCompound(output);
+            if (sources.size() == 1) {
+                compoundBuilder.Add(output, sources.front());
+            }
+            else {
+                BOPAlgo_Builder split;
+                split.SetNonDestructive(true);
+                split.SetFuzzyValue(tolerance);
+                for (const auto& source : sources) split.AddArgument(source);
+                split.Perform();
+                if (split.HasErrors()) {
+                    error = QStringLiteral("Connect generalFuse failed");
+                    return false;
+                }
+                struct Piece {
+                    TopoDS_Shape shape;
+                    std::vector<std::size_t> owners;
+                };
+                std::vector<Piece> pieces;
+                for (TopExp_Explorer it(split.Shape(), TopAbs_SOLID); it.More(); it.Next()) {
+                    bool duplicate = false;
+                    for (const auto& piece : pieces) duplicate |= piece.shape.IsSame(it.Current());
+                    if (!duplicate) pieces.push_back({it.Current(), {}});
+                }
+                for (std::size_t source = 0; source < sources.size(); ++source) {
+                    const auto& modified = split.Modified(sources[source]);
+                    for (auto& piece : pieces) {
+                        bool belongs = piece.shape.IsSame(sources[source]);
+                        for (TopTools_ListIteratorOfListOfShape it(modified); it.More(); it.Next()) {
+                            belongs |= piece.shape.IsSame(it.Value());
+                            for (TopExp_Explorer solid(it.Value(), TopAbs_SOLID); solid.More(); solid.Next()) {
+                                belongs |= piece.shape.IsSame(solid.Current());
+                            }
+                        }
+                        if (belongs) piece.owners.push_back(source);
+                    }
+                }
+                for (const auto& piece : pieces) {
+                    if (piece.owners.empty()) {
+                        error = QStringLiteral("Connect could not resolve generalFuse source membership");
+                        return false;
+                    }
+                }
+                std::vector<TopoDS_Shape> keepers;
+                for (std::size_t source = 0; source < sources.size(); ++source) {
+                    double maximum = -1.0;
+                    int count = 0;
+                    TopoDS_Shape largest;
+                    for (const auto& piece : pieces) {
+                        if (piece.owners.size() != 1 || piece.owners.front() != source) continue;
+                        GProp_GProps properties;
+                        BRepGProp::VolumeProperties(piece.shape, properties);
+                        const double mass = std::abs(properties.Mass());
+                        if (!std::isfinite(mass)) {
+                            error = QStringLiteral("Connect fragment has nonfinite volume");
+                            return false;
+                        }
+                        if (mass > maximum * (1.0 + 1e-8)) {
+                            maximum = mass;
+                            count = 1;
+                            largest = piece.shape;
+                        }
+                        else if (mass >= maximum * (1.0 - 1e-8)) ++count;
+                    }
+                    if (count > 1) {
+                        error = QStringLiteral("There is more than one largest piece!");
+                        return false;
+                    }
+                    if (!largest.IsNull()) keepers.push_back(largest);
+                }
+                auto frontier = keepers;
+                for (std::size_t overlap = 2; overlap <= sources.size(); ++overlap) {
+                    std::vector<TopoDS_Shape> next;
+                    for (const auto& piece : pieces) {
+                        if (piece.owners.size() != overlap) continue;
+                        bool connected = false;
+                        for (const auto& previous : frontier) {
+                            for (TopExp_Explorer a(piece.shape, TopAbs_FACE); a.More(); a.Next()) {
+                                for (TopExp_Explorer b(previous, TopAbs_FACE); b.More(); b.Next()) {
+                                    connected |= a.Current().IsSame(b.Current());
+                                }
+                            }
+                        }
+                        if (connected) next.push_back(piece.shape);
+                    }
+                    if (next.empty()) break;
+                    keepers.insert(keepers.end(), next.begin(), next.end());
+                    frontier = next;
+                }
+                if (!keepers.empty()) {
+                    TopoDS_Shape merged = keepers.front();
+                    for (std::size_t i = 1; i < keepers.size(); ++i) {
+                        BRepAlgoAPI_Fuse fuse(merged, keepers[i]);
+                        if (!fuse.IsDone() || fuse.Shape().IsNull()) {
+                            error = QStringLiteral("Connect could not merge retained fragments");
+                            return false;
+                        }
+                        merged = fuse.Shape();
+                    }
+                    for (TopExp_Explorer solid(merged, TopAbs_SOLID); solid.More(); solid.Next()) {
+                        compoundBuilder.Add(output, solid.Current());
+                    }
+                }
+            }
+            publishShape(output, result);
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("join-connect"));
+            return true;
+        }
+        if (command == QLatin1String("Part_JoinCutout")
+            || command == QLatin1String("Part_JoinEmbed")
+            || command == QLatin1String("Part_Slice")
+            || command == QLatin1String("Part_SliceApart")) {
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            const bool sliceApart = command == QLatin1String("Part_SliceApart");
+            const bool slice = command == QLatin1String("Part_Slice") || sliceApart;
+            if ((slice && shapes.size() < 2) || (!slice && shapes.size() != 2)) {
+                error = slice
+                    ? QStringLiteral("Part_Slice requires a base shape followed by at least one cutting tool")
+                    : QStringLiteral("Join requires exactly two shapes in base, tool order");
+                return false;
+            }
+            if (shapes.front().ShapeType() != TopAbs_SOLID
+                || (!slice && shapes[1].ShapeType() != TopAbs_SOLID)) {
+                error = QStringLiteral("This command currently supports solid bases and solid Join tools; aggregate, shell and wire Join semantics remain implementation_required");
+                return false;
+            }
+            const QJsonValue toleranceValue = args.value(QStringLiteral("tolerance"));
+            if (!toleranceValue.isUndefined() && !toleranceValue.isDouble()) {
+                error = QStringLiteral("tolerance must be a finite nonnegative number");
+                return false;
+            }
+            const double tolerance = toleranceValue.toDouble(0.0);
+            if (!std::isfinite(tolerance) || tolerance < 0.0) {
+                error = QStringLiteral("tolerance must be a finite nonnegative number");
+                return false;
+            }
+            TopoDS_Shape output;
+            if (slice) {
+                if (args.contains(QStringLiteral("mode"))
+                    && args.value(QStringLiteral("mode")).toString() != QLatin1String("Split")) {
+                    error = QStringLiteral("Part_Slice desktop command requires mode Split");
+                    return false;
+                }
+                TopTools_ListOfShape bases;
+                TopTools_ListOfShape tools;
+                bases.Append(shapes.front());
+                for (std::size_t i = 1; i < shapes.size(); ++i) {
+                    tools.Append(shapes[i]);
+                }
+                // Split only the base: tool fragments must not enter the result.
+                BRepAlgoAPI_Splitter splitter;
+                splitter.SetArguments(bases);
+                splitter.SetTools(tools);
+                splitter.SetNonDestructive(true);
+                splitter.SetFuzzyValue(tolerance);
+                splitter.Build();
+                if (!splitter.IsDone() || splitter.Shape().IsNull()) {
+                    error = QStringLiteral("OpenCascade could not slice the supplied base with the supplied tools");
+                    return false;
+                }
+                QJsonArray parts;
+                TopoDS_Shape onlyPart;
+                for (TopExp_Explorer piece(splitter.Shape(), TopAbs_SOLID); piece.More(); piece.Next()) {
+                    QJsonObject item;
+                    onlyPart = piece.Current();
+                    publishShape(onlyPart, item);
+                    parts.append(item);
+                }
+                if (parts.isEmpty()) {
+                    error = QStringLiteral("Slice produced no solid pieces");
+                    return false;
+                }
+                output = parts.size() == 1 ? onlyPart : splitter.Shape();
+                result.insert(QStringLiteral("parts"), parts);
+                result.insert(QStringLiteral("partCount"), parts.size());
+                result.insert(QStringLiteral("documentOperation"), sliceApart
+                    ? QStringLiteral("slice-apart") : QStringLiteral("slice"));
+            }
+            else {
+                // JoinAPI's legacy Cutout/Embed ignore tolerance; do not silently
+                // apply fuzzy booleans with different semantics.
+                if (tolerance != 0.0) {
+                    error = QStringLiteral("Join Cutout/Embed currently require tolerance 0, matching the legacy geometry handler");
+                    return false;
+                }
+                BRepAlgoAPI_Cut cut(shapes.front(), shapes[1]);
+                if (!cut.IsDone() || cut.Shape().IsNull()) {
+                    error = QStringLiteral("OpenCascade Join base-minus-tool operation failed");
+                    return false;
+                }
+                double largestVolume = -1.0;
+                for (TopExp_Explorer piece(cut.Shape(), TopAbs_SOLID); piece.More(); piece.Next()) {
+                    GProp_GProps properties;
+                    BRepGProp::VolumeProperties(piece.Current(), properties);
+                    const double volume = std::abs(properties.Mass());
+                    if (std::isfinite(volume) && volume > largestVolume) {
+                        largestVolume = volume;
+                        output = piece.Current();
+                    }
+                }
+                if (output.IsNull()) {
+                    error = QStringLiteral("Join cut leaves no solid base fragment");
+                    return false;
+                }
+                if (command == QLatin1String("Part_JoinEmbed")) {
+                    BRepAlgoAPI_Fuse embed(output, shapes[1]);
+                    if (!embed.IsDone() || embed.Shape().IsNull()) {
+                        error = QStringLiteral("OpenCascade could not fuse the largest base fragment with the embedding tool");
+                        return false;
+                    }
+                    output = embed.Shape();
+                    result.insert(QStringLiteral("documentOperation"), QStringLiteral("join-embed"));
+                }
+                else {
+                    result.insert(QStringLiteral("documentOperation"), QStringLiteral("join-cutout"));
+                }
+            }
+            publishShape(output, result);
+            return true;
+        }
+        if (command == QLatin1String("Part_XOR")) {
+            const double tolerance = args.value(QStringLiteral("tolerance")).toDouble(
+                args.contains(QStringLiteral("tolerance"))
+                    ? std::numeric_limits<double>::quiet_NaN() : 0.0);
+            if (!std::isfinite(tolerance) || tolerance < 0.0) {
+                error = QStringLiteral("XOR tolerance must be finite and nonnegative");
+                return false;
+            }
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            if (shapes.size() == 1 && shapes.front().ShapeType() == TopAbs_COMPOUND) {
+                const TopoDS_Shape compound = shapes.front();
+                shapes.clear();
+                for (TopoDS_Iterator child(compound); child.More(); child.Next()) {
+                    shapes.push_back(child.Value());
+                }
+            }
+            if (shapes.size() < 2) {
+                error = QStringLiteral("XOR requires two shapes or a compound containing two shapes");
+                return false;
+            }
+            std::vector<TopoDS_Shape> pending = shapes;
+            while (!pending.empty()) {
+                const TopoDS_Shape shape = pending.back();
+                pending.pop_back();
+                if (shape.ShapeType() == TopAbs_SOLID) {
+                    continue;
+                }
+                if (shape.ShapeType() != TopAbs_COMPOUND && shape.ShapeType() != TopAbs_COMPSOLID) {
+                    error = QStringLiteral("XOR currently requires solids or aggregates of solids; surface and wire XOR is not implemented");
+                    return false;
+                }
+                for (TopoDS_Iterator child(shape); child.More(); child.Next()) {
+                    pending.push_back(child.Value());
+                }
+            }
+            BOPAlgo_Builder fragments;
+            fragments.SetNonDestructive(true);
+            fragments.SetFuzzyValue(tolerance);
+            for (const TopoDS_Shape& shape : shapes) {
+                fragments.AddArgument(shape);
+            }
+            fragments.Perform();
+            if (fragments.HasErrors() || fragments.Shape().IsNull()) {
+                error = QStringLiteral("XOR general fuse failed for the supplied shapes");
+                return false;
+            }
+            TopoDS_Compound output;
+            BRep_Builder builder;
+            builder.MakeCompound(output);
+            // SplitAPI.xor keeps general-fuse pieces with odd source membership.
+            // Volume overlap determines membership for the supported solid domain.
+            for (TopExp_Explorer piece(fragments.Shape(), TopAbs_SOLID); piece.More(); piece.Next()) {
+                GProp_GProps properties;
+                BRepGProp::VolumeProperties(piece.Current(), properties);
+                const double volume = std::abs(properties.Mass());
+                if (!std::isfinite(volume) || volume <= 0.0) {
+                    error = QStringLiteral("XOR produced a solid without positive finite volume");
+                    return false;
+                }
+                unsigned sources = 0;
+                for (const TopoDS_Shape& source : shapes) {
+                    BRepAlgoAPI_Common overlap(piece.Current(), source);
+                    if (!overlap.IsDone() || overlap.Shape().IsNull()) {
+                        error = QStringLiteral("XOR source membership calculation failed");
+                        return false;
+                    }
+                    GProp_GProps commonProperties;
+                    BRepGProp::VolumeProperties(overlap.Shape(), commonProperties);
+                    if (std::abs(commonProperties.Mass()) > volume * 0.5) {
+                        ++sources;
+                    }
+                }
+                if (sources % 2 == 1) {
+                    builder.Add(output, piece.Current());
+                }
+            }
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("boolean"));
+            publishShape(output, result);
+            return true;
+        }
+        if (command == QLatin1String("Part_BooleanFragments")) {
+            // SplitFeatures activates Standard mode; preserve general-fuse aggregates.
+            const QString mode = args.value(QStringLiteral("mode")).toString(QStringLiteral("Standard"));
+            if (mode != QLatin1String("Standard")) {
+                error = QStringLiteral("BooleanFragments currently supports Standard mode only");
+                return false;
+            }
+            const double tolerance = args.value(QStringLiteral("tolerance")).toDouble(
+                args.contains(QStringLiteral("tolerance"))
+                    ? std::numeric_limits<double>::quiet_NaN() : 0.0);
+            if (!std::isfinite(tolerance) || tolerance < 0.0) {
+                error = QStringLiteral("tolerance must be a finite nonnegative number");
+                return false;
+            }
+            std::vector<TopoDS_Shape> shapes;
+            if (!readShapes(args, shapes, error)) {
+                return false;
+            }
+            if (shapes.size() == 1 && shapes.front().ShapeType() == TopAbs_COMPOUND) {
+                const TopoDS_Shape compound = shapes.front();
+                shapes.clear();
+                for (TopoDS_Iterator child(compound); child.More(); child.Next()) {
+                    shapes.push_back(child.Value());
+                }
+            }
+            if (shapes.size() < 2) {
+                error = QStringLiteral("BooleanFragments requires at least two shapes or a compound containing at least two shapes");
+                return false;
+            }
+            BOPAlgo_Builder fragments;
+            fragments.SetNonDestructive(true);
+            fragments.SetFuzzyValue(tolerance);
+            for (const TopoDS_Shape& shape : shapes) {
+                fragments.AddArgument(shape);
+            }
+            fragments.Perform();
+            if (fragments.HasErrors() || fragments.Shape().IsNull()) {
+                error = QStringLiteral("BooleanFragments general fuse failed for the supplied shapes");
+                return false;
+            }
+            result.insert(QStringLiteral("documentOperation"), QStringLiteral("boolean"));
+            result.insert(QStringLiteral("mode"), mode);
+            publishShape(fragments.Shape(), result);
+            return true;
+        }
         if (spec->operation == Operation::BoxSelection) {
             const QJsonArray selection = args.value(QStringLiteral("selection")).toArray();
             result.insert(QStringLiteral("documentOperation"), QStringLiteral("box-selection"));

src/WebAssembly/FreeCADCoreProbe/SketcherDesktopCommands.cpp

@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+#include <Python.h>
+#include "SketcherDesktopCommands.h"
+#include <QJsonDocument>
+#include <QJsonParseError>
+
+#ifndef FC_WEB_IMPLEMENTED_DESKTOP_COMMAND
+#define FC_WEB_IMPLEMENTED_DESKTOP_COMMAND(name)
+#endif
+FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("Sketcher_ProfilesHexagon1")
+
+static bool executeHexagonProfileCommand(const QJsonObject& args,
+                                        QJsonObject& output, std::string& error)
+{
+    PyObject* globals = PyDict_New();
+    const QByteArray encoded = QJsonDocument(args).toJson(QJsonDocument::Compact);
+    PyObject* input = PyUnicode_FromStringAndSize(encoded.constData(), encoded.size());
+    if (!globals || !input) {
+        Py_XDECREF(globals);
+        Py_XDECREF(input);
+        PyErr_Clear();
+        error = "Unable to allocate Sketcher command arguments";
+        return false;
+    }
+    PyDict_SetItemString(globals, "__builtins__", PyEval_GetBuiltins());
+    PyDict_SetItemString(globals, "request_json", input);
+    Py_DECREF(input);
+    // Execute the packaged official profile function without importing desktop GUI modules.
+    const char* script = R"PY(
+import ast, json
+import FreeCAD as App, Part, Sketcher
+a = json.loads(request_json)
+d = App.ActiveDocument
+if d is None:
+    raise ValueError('An active document is required')
+if 'documentName' in a and a['documentName'] != d.Name:
+    raise ValueError('Requested document is not the active document')
+name = a.get('sketchName')
+if name is not None and (not isinstance(name, str) or not name):
+    raise ValueError('sketchName must be a nonempty object name')
+s = d.getObject(name) if name else None
+if name and (s is None or not s.isDerivedFrom('Sketcher::SketchObject')):
+    raise ValueError('Requested object is not a sketch in the active document')
+path = '/freecad-mod/Sketcher/ProfileLib/Hexagon.py'
+with open(path) as source:
+    tree = ast.parse(source.read(), path)
+tree.body = [node for node in tree.body if isinstance(node, ast.FunctionDef) and node.name == 'makeHexagonSimple']
+if len(tree.body) != 1:
+    raise RuntimeError('Official hexagon profile function is unavailable')
+env = {'App': App, 'FreeCAD': App, 'Part': Part, 'Sketcher': Sketcher}
+exec(compile(tree, path, 'exec'), env)
+before = {obj.Name for obj in d.Objects}
+d.openTransaction('Create hexagon profile')
+try:
+    env['makeHexagonSimple'](name)
+    if s is None:
+        created = [obj for obj in d.Objects if obj.Name not in before and obj.isDerivedFrom('Sketcher::SketchObject')]
+        if len(created) != 1:
+            raise RuntimeError('Profile did not create a unique sketch')
+        s = created[0]
+    solve_status = s.solve()
+    if solve_status != 0:
+        raise RuntimeError('Hexagon profile solver failed: %s' % solve_status)
+    d.recompute()
+    result_json = json.dumps({'documentName': d.Name, 'objectName': s.Name,
+        'objectType': s.TypeId, 'geometryCount': s.GeometryCount,
+        'constraintCount': s.ConstraintCount, 'brep': s.Shape.exportBrepToString(),
+        'edges': [[[p.x, p.y, p.z] for p in edge.discretize(Deflection=0.1)] for edge in s.Shape.Edges]})
+    d.commitTransaction()
+except BaseException:
+    d.abortTransaction()
+    raise
+)PY";
+    PyObject* execution = PyRun_String(script, Py_file_input, globals, globals);
+    if (!execution) {
+        PyObject *type = nullptr, *value = nullptr, *traceback = nullptr;
+        PyErr_Fetch(&type, &value, &traceback);
+        PyErr_NormalizeException(&type, &value, &traceback);
+        PyObject* message = value ? PyObject_Str(value) : nullptr;
+        const char* text = message ? PyUnicode_AsUTF8(message) : nullptr;
+        error = text ? text : "Sketcher desktop command failed";
+        Py_XDECREF(message);
+        Py_XDECREF(type);
+        Py_XDECREF(value);
+        Py_XDECREF(traceback);
+        PyErr_Clear();
+        Py_DECREF(globals);
+        return false;
+    }
+    Py_DECREF(execution);
+    PyObject* result = PyDict_GetItemString(globals, "result_json");
+    const char* text = result ? PyUnicode_AsUTF8(result) : nullptr;
+    QJsonParseError parseError;
+    const QJsonDocument decoded = QJsonDocument::fromJson(text ? QByteArray(text) : QByteArray(), &parseError);
+    const bool ok = parseError.error == QJsonParseError::NoError && decoded.isObject();
+    if (!ok) {
+        error = "Invalid native Sketcher command result";
+        Py_DECREF(globals);
+        return false;
+    }
+    output = decoded.object();
+    output.insert(QStringLiteral("documentHandle"), output.value(QStringLiteral("documentName")));
+    output.insert(QStringLiteral("objectHandle"), output.value(QStringLiteral("objectName")));
+    output.insert(QStringLiteral("recomputed"), true);
+    Py_DECREF(globals);
+    return ok;
+}
+
+bool executeSketcherDesktopCommand(const QString& command, const QJsonObject& args,
+                                  QJsonObject& result, std::string& error)
+{
+    if (command == QStringLiteral("Sketcher_ProfilesHexagon1")) {
+        if (!executeHexagonProfileCommand(args, result, error))
+            return false;
+        result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+        result.insert(QStringLiteral("command"), command);
+        return true;
+    }
+    error = "Unsupported Sketcher desktop command";
+    return false;
+}

src/WebAssembly/FreeCADCoreProbe/SketcherDesktopCommands.h

@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+#pragma once
+#include <QJsonObject>
+#include <QString>
+#include <string>
+
+bool executeSketcherDesktopCommand(const QString& command, const QJsonObject& args,
+                                  QJsonObject& output, std::string& error);

src/WebAssembly/FreeCADCoreProbe/SketcherProbe.cpp

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
 #include <App/Application.h>
+#include "SketcherDesktopCommands.h"
 #include <App/Document.h>
 #include <Base/Exception.h>
 #include <Base/FileInfo.h>
@@ -873,6 +874,32 @@ QJsonObject probePythonFamilyRecord(const QJsonObject& input)
         return result;
     }
 
+    if (apiId.startsWith(QStringLiteral("Sketcher:desktop:"))) {
+        const QString command = apiId.mid(QStringLiteral("Sketcher:desktop:").size());
+        if (command == QStringLiteral("Sketcher_ProfilesHexagon1")) {
+            if (name != command || !input.value(QStringLiteral("args")).isObject()) {
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("invalid_request"));
+                result.insert(QStringLiteral("message"), QStringLiteral("Hexagon requires the matching command name and an args object"));
+                return result;
+            }
+            QJsonObject value;
+            std::string commandError;
+            if (!executeSketcherDesktopCommand(command, input.value(QStringLiteral("args")).toObject(), value, commandError)) {
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("native_command_failed"));
+                result.insert(QStringLiteral("message"), QString::fromStdString(commandError));
+                result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
+                return result;
+            }
+            result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+            result.insert(QStringLiteral("command"), command);
+            result.insert(QStringLiteral("result"), value);
+            result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
+            return result;
+        }
+    }
+
     if (family == QStringLiteral("desktop-command")) {
         const QStringList commands = {
             QStringLiteral("Constraints"), QStringLiteral("Geometries"), QStringLiteral("Sketcher"),

src/WebAssembly/FreeCADCoreProbe/TechDrawDesktopCommands.h

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: LGPL-2.1-or-later
+#pragma once
+#include <QJsonObject>
+#include <QString>
+
+bool dispatchTechDrawDesktopCommand(const QString& name, const QJsonObject& input,
+                                  QJsonObject& result);

src/WebAssembly/FreeCADCoreProbe/TechDrawRuntimeProbe.cpp

@@ -1,15 +1,19 @@
 // SPDX-License-Identifier: LGPL-2.1-or-later
 #include <App/Application.h>
+#include "TechDrawDesktopCommands.h"
 #include <App/Document.h>
 #include <Base/Exception.h>
 #include <Base/FileInfo.h>
 #include <Base/Type.h>
 #include <Mod/Part/App/FeaturePartBox.h>
 #include <Mod/TechDraw/App/Cosmetic.h>
+#include <Mod/TechDraw/App/CenterLine.h>
 #include <Mod/TechDraw/App/DrawPage.h>
+#include <Mod/TechDraw/App/DrawSVGTemplate.h>
 #include <Mod/TechDraw/App/DrawProjGroup.h>
 #include <Mod/TechDraw/App/DrawProjGroupItem.h>
 #include <Mod/TechDraw/App/DrawViewDimension.h>
+#include <Mod/TechDraw/App/DrawViewClip.h>
 #include <Mod/TechDraw/App/DrawViewPart.h>
 #include <Mod/TechDraw/App/GeometryObject.h>
 #include <Mod/TechDraw/App/LineFormat.h>
@@ -19,10 +23,14 @@
 #include <QJsonObject>
 #include <QJsonParseError>
 #include <QSet>
+#include <QRegularExpression>
 #include <QString>
+#include <BRepGProp.hxx>
+#include <GProp_GProps.hxx>
 #include <emscripten/emscripten.h>
 #include <cmath>
 #include <fstream>
+#include <memory>
 #include <string>
 #include <vector>
 
@@ -290,6 +298,131 @@ bool callProjection(const char* name, PyObject* shape, int& bytes)
     return bytes > 0;
 }
 
+QJsonObject createDrawing(const QJsonObject& args)
+{
+    App::Document* doc = nullptr;
+    bool created = false;
+    bool transaction = false;
+    const char* stage = "validate";
+    QJsonObject result;
+    try {
+        if (args.value(QStringLiteral("schema")) != QStringLiteral("freecad-web-techdraw/frontend-drawing/v1")
+            || args.value(QStringLiteral("module")) != QStringLiteral("TechDraw")
+            || args.value(QStringLiteral("action")) != QStringLiteral("create/recompute"))
+            throw Base::ValueError("TechDraw drawing envelope is invalid");
+        const auto idValue = args.value(QStringLiteral("documentId"));
+        const QString id = idValue.isUndefined() ? QStringLiteral("TechDrawDrawing") : idValue.toString();
+        if (!QRegularExpression(QStringLiteral("^[A-Za-z_][A-Za-z0-9_]{0,63}$")).match(id).hasMatch())
+            throw Base::ValueError("documentId must be a valid document name of at most 64 characters");
+        const bool update = args.contains(QStringLiteral("box"));
+        const QJsonObject dimensions = args.value(QStringLiteral("box")).toObject();
+        double sizes[3] = {};
+        const char* keys[] = {"length", "width", "height"};
+        if (update) {
+            for (int i = 0; i < 3; ++i) {
+                const auto value = dimensions.value(QString::fromLatin1(keys[i]));
+                sizes[i] = value.toDouble();
+                if (!value.isDouble() || !std::isfinite(sizes[i]) || sizes[i] <= 0)
+                    throw Base::ValueError("Box dimensions must be positive finite numbers");
+            }
+        }
+        stage = "initialize";
+        if (!ensureTechDraw()) throw Base::RuntimeError(errorMessage);
+        stage = "document";
+        auto& app = App::GetApplication();
+        doc = app.getDocument(id.toUtf8().constData());
+        if (!doc) {
+            if (!update) throw Base::ValueError("Drawing document does not exist");
+            doc = app.newDocument(id.toUtf8().constData(), id.toUtf8().constData(), {false, true});
+            created = true;
+        }
+        if (!doc) throw Base::RuntimeError("Drawing document creation failed");
+        doc->setUndoMode(1);
+        doc->openTransaction("Create or recompute drawing");
+        transaction = true;
+        stage = "objects";
+        auto object = [&](const char* type, const char* name) {
+            auto* existing = doc->getObject(name);
+            if (!created && !existing) throw Base::ValueError("Drawing document is missing its native objects");
+            return existing ? existing : doc->addObject(type, name);
+        };
+        auto* box = dynamic_cast<Part::Box*>(object("Part::Box", "Box"));
+        auto* page = dynamic_cast<TechDraw::DrawPage*>(object("TechDraw::DrawPage", "Page"));
+        auto* templ = dynamic_cast<TechDraw::DrawSVGTemplate*>(object("TechDraw::DrawSVGTemplate", "Template"));
+        auto* view = dynamic_cast<TechDraw::DrawViewPart*>(object("TechDraw::DrawViewPart", "View"));
+        if (!box || !page || !templ || !view) throw Base::ValueError("Drawing object names are used by incompatible objects");
+        if (update) {
+            box->Length.setValue(sizes[0]);
+            box->Width.setValue(sizes[1]);
+            box->Height.setValue(sizes[2]);
+        }
+        if (created) {
+            templ->Template.setValue("/freecad-mod/TechDraw/Templates/ISO/A4_Landscape_blank.svg");
+            page->Template.setValue(templ);
+            page->addView(view);
+            view->Source.setValues({box});
+            view->Direction.setValue(Base::Vector3d(0, -1, 0));
+            view->XDirection.setValue(Base::Vector3d(1, 0, 0));
+        }
+        stage = "recompute";
+        bool failed = false;
+        doc->recompute({}, false, &failed);
+        if (failed || box->isError() || view->isError() || view->getEdgeGeometry().empty())
+            throw Base::RuntimeError("Drawing recompute did not produce usable native geometry");
+        stage = "render";
+        auto decref = [](PyObject* value) { Py_XDECREF(value); };
+        using PythonRef = std::unique_ptr<PyObject, decltype(decref)>;
+        PythonRef viewObject(view->getPyObject(), decref);
+        auto* module = PyDict_GetItemString(PyImport_GetModuleDict(), "TechDraw");
+        PythonRef rendered(viewObject && module
+            ? PyObject_CallMethod(module, "viewPartAsSvg", "O", viewObject.get()) : nullptr, decref);
+        const char* svg = rendered && PyUnicode_Check(rendered.get()) ? PyUnicode_AsUTF8(rendered.get()) : nullptr;
+        if (!svg || !*svg) throw Base::RuntimeError(pythonError("Native SVG rendering failed"));
+        GProp_GProps properties;
+        BRepGProp::VolumeProperties(box->Shape.getValue(), properties);
+        const double volume = properties.Mass();
+        if (!std::isfinite(volume) || volume <= 0) throw Base::RuntimeError("Native shape volume is invalid");
+        const auto bounds = view->getBoundingBox();
+        result.insert(QStringLiteral("ok"), true);
+        result.insert(QStringLiteral("schema"), args.value(QStringLiteral("schema")));
+        result.insert(QStringLiteral("module"), QStringLiteral("TechDraw"));
+        result.insert(QStringLiteral("action"), QStringLiteral("create/recompute"));
+        result.insert(QStringLiteral("source"), QStringLiteral("freecad-source"));
+        result.insert(QStringLiteral("nativeSource"), QStringLiteral("TechDraw::DrawViewPart"));
+        result.insert(QStringLiteral("renderer"), QStringLiteral("TechDraw.viewPartAsSvg"));
+        result.insert(QStringLiteral("box"), QJsonObject{{"length", box->Length.getValue()}, {"width", box->Width.getValue()}, {"height", box->Height.getValue()}});
+        result.insert(QStringLiteral("volume"), volume);
+        result.insert(QStringLiteral("svg"), QString::fromUtf8(svg));
+        result.insert(QStringLiteral("bounds"), QJsonArray{bounds.MinX, bounds.MinY, bounds.MaxX, bounds.MaxY});
+        result.insert(QStringLiteral("edgeCount"), static_cast<int>(view->getEdgeGeometry().size()));
+        result.insert(QStringLiteral("document"), QJsonObject{{"name", QString::fromUtf8(doc->getName())}, {"objectCount", doc->countObjects()}, {"keptOpen", true}});
+        result.insert(QStringLiteral("page"), QString::fromUtf8(page->getNameInDocument()));
+        result.insert(QStringLiteral("pageSize"), QJsonArray{page->getPageWidth(), page->getPageHeight()});
+        result.insert(QStringLiteral("view"), QString::fromUtf8(view->getNameInDocument()));
+        doc->commitTransaction();
+        return result;
+    } catch (const Base::Exception& error) {
+        result = QJsonObject{{"ok", false}, {"code", "drawing_failed"}, {"error", QString::fromUtf8(error.what())}};
+    } catch (const std::exception& error) {
+        result = QJsonObject{{"ok", false}, {"code", "drawing_failed"}, {"error", QString::fromUtf8(error.what())}};
+    } catch (const Standard_Failure& error) {
+        result = QJsonObject{{"ok", false}, {"code", "drawing_failed"}, {"error", QString::fromUtf8(error.GetMessageString())}};
+    } catch (...) {
+        result = QJsonObject{{"ok", false}, {"code", "drawing_failed"}, {"error", QString::fromStdString(
+            Py_IsInitialized() ? pythonError("Native drawing exception") : "Native drawing initialization exception")}};
+    }
+    result.insert(QStringLiteral("stage"), QString::fromLatin1(stage));
+    errorMessage = QJsonDocument(result).toJson(QJsonDocument::Compact).toStdString();
+    if (Py_IsInitialized()) PyErr_Clear();
+    try {
+        if (created && doc) App::GetApplication().closeDocument(doc);
+        else if (transaction && doc) doc->abortTransaction();
+    } catch (...) {
+        result.insert(QStringLiteral("rollbackFailed"), true);
+    }
+    return result;
+}
+
 bool executeDrawViewPartMethod(const QString& name, QJsonObject& value, std::string& failure)
 {
     App::Document* document = nullptr;
@@ -541,7 +674,375 @@ QJsonObject probePythonFamilyRecord(const QJsonObject& input, const QString& tie
     result.insert(QStringLiteral("native"), true);
     result.insert(QStringLiteral("sourceEntry"), sourcePath); result.insert(QStringLiteral("sourceRevision"), QString::fromUtf8(techdrawPythonSourceRevision));
     result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
-    // FC_WEB_AUDITED_DESKTOP_FAMILY("TechDraw")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ClipGroup")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ClipGroupAdd")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ClipGroupRemove")
+    if (apiId.startsWith(QStringLiteral("TechDraw:desktop:"))) {
+        const bool createClip = name == QStringLiteral("TechDraw_ClipGroup");
+        const bool addClip = name == QStringLiteral("TechDraw_ClipGroupAdd");
+        const bool removeClip = name == QStringLiteral("TechDraw_ClipGroupRemove");
+        if (createClip || addClip || removeClip) {
+            QJsonObject args = input.value(QStringLiteral("args")).toObject();
+            if (args.value(QStringLiteral("args")).isObject()) args = args.value(QStringLiteral("args")).toObject();
+            result.insert(QStringLiteral("parameterSchema"), QStringLiteral("{document:string,page:string,clip?:string,view?:string}"));
+            App::Document* document = nullptr;
+            bool transaction = false;
+            try {
+                if (apiId != QStringLiteral("TechDraw:desktop:") + name)
+                    throw Base::RuntimeError("Desktop command ID/name mismatch");
+                const QString documentName = args.value(QStringLiteral("document")).toString();
+                const QString pageName = args.value(QStringLiteral("page")).toString();
+                if (documentName.isEmpty() || pageName.isEmpty())
+                    throw Base::RuntimeError("document and page handles are required");
+                document = App::GetApplication().getDocument(documentName.toUtf8().constData());
+                auto* page = document ? dynamic_cast<TechDraw::DrawPage*>(document->getObject(pageName.toUtf8().constData())) : nullptr;
+                if (!page) throw Base::RuntimeError("Selected document/page does not exist or is not a DrawPage");
+                TechDraw::DrawViewClip* clip = nullptr;
+                TechDraw::DrawView* view = nullptr;
+                if (!createClip) {
+                    const QString viewName = args.value(QStringLiteral("view")).toString();
+                    if (viewName.isEmpty()) throw Base::RuntimeError("A view handle is required");
+                    view = dynamic_cast<TechDraw::DrawView*>(document->getObject(viewName.toUtf8().constData()));
+                    if (!view || view->findParentPage() != page)
+                        throw Base::RuntimeError("Selected view must belong to the selected page");
+                    if (addClip) {
+                        const QString clipName = args.value(QStringLiteral("clip")).toString();
+                        if (clipName.isEmpty()) throw Base::RuntimeError("A clip handle is required");
+                        clip = dynamic_cast<TechDraw::DrawViewClip*>(document->getObject(clipName.toUtf8().constData()));
+                        if (!clip || clip->findParentPage() != page || dynamic_cast<TechDraw::DrawViewClip*>(view))
+                            throw Base::RuntimeError("Select one clip group and one non-clip view from the same page");
+                        if (clip->isViewInClip(view)) throw Base::RuntimeError("View already belongs to the clip");
+                    } else {
+                        for (auto* candidate : page->getViews()) {
+                            auto* candidateClip = dynamic_cast<TechDraw::DrawViewClip*>(candidate);
+                            if (candidateClip && candidateClip->isViewInClip(view)) { clip = candidateClip; break; }
+                        }
+                        if (!clip) throw Base::RuntimeError("View does not belong to a clip");
+                    }
+                }
+                document->openTransaction(name.toUtf8().constData());
+                transaction = true;
+                if (createClip) {
+                    clip = dynamic_cast<TechDraw::DrawViewClip*>(document->addObject("TechDraw::DrawViewClip", "Clip"));
+                    if (!clip) throw Base::RuntimeError("DrawViewClip creation failed");
+                    page->addView(clip);
+                } else if (addClip) {
+                    clip->addView(view);
+                } else {
+                    clip->removeView(view);
+                }
+                document->recompute();
+                if (clip->findParentPage() != page || (!createClip && clip->isViewInClip(view) != addClip))
+                    throw Base::RuntimeError("Clip membership update failed");
+                QJsonObject typed;
+                typed.insert(QStringLiteral("document"), documentName);
+                typed.insert(QStringLiteral("page"), QString::fromUtf8(page->getNameInDocument()));
+                typed.insert(QStringLiteral("clip"), QString::fromUtf8(clip->getNameInDocument()));
+                QJsonArray members;
+                for (auto* member : clip->getViews()) members.push_back(QString::fromUtf8(member->getNameInDocument()));
+                typed.insert(QStringLiteral("views"), members);
+                if (view) typed.insert(QStringLiteral("view"), QString::fromUtf8(view->getNameInDocument()));
+                document->commitTransaction();
+                transaction = false;
+                result.insert(QStringLiteral("result"), typed);
+                if (name == QStringLiteral("TechDraw_ClipGroup")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                } else if (name == QStringLiteral("TechDraw_ClipGroupAdd")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                } else if (name == QStringLiteral("TechDraw_ClipGroupRemove")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                }
+                result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command"));
+            } catch (const Base::Exception& error) {
+                if (transaction) document->abortTransaction();
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("invalid_selection_or_operation"));
+                result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+            } catch (const std::exception& error) {
+                if (transaction) document->abortTransaction();
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command_failed"));
+                result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+            }
+            result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
+            return result;
+        }
+        if (dispatchTechDrawDesktopCommand(name, input, result)) return result;
+        QString dependency;
+        if (name == QStringLiteral("TechDraw_ProjectionGroup")) dependency = QStringLiteral("Official projection-group task selection, projection directions and DrawProjGroup creation contract");
+        else if (name == QStringLiteral("TechDraw_SectionGroup")) dependency = QStringLiteral("Official section-group command mode selection and section task execution contract");
+        else if (name == QStringLiteral("TechDraw_ActiveView")) dependency = QStringLiteral("Active viewport capture and TaskDlgActiveView parameters");
+        else if (name == QStringLiteral("TechDraw_ArchView")) dependency = QStringLiteral("BIM section-plane validation and DrawViewArch source/render contract");
+        else if (name == QStringLiteral("TechDraw_Balloon")) dependency = QStringLiteral("Page placement/selected geometry and QGSPage balloon creation semantics");
+        else if (name == QStringLiteral("TechDraw_BrokenView")) dependency = QStringLiteral("Base/source selection, break definitions and broken-view task execution");
+        else if (name == QStringLiteral("TechDraw_ComplexSection")) dependency = QStringLiteral("execComplexSection selection and section task parameters");
+        else if (name == QStringLiteral("TechDraw_DetailView")) dependency = QStringLiteral("TaskDlgDetail base view, detail boundary and placement contract");
+        else if (name == QStringLiteral("TechDraw_DraftView")) dependency = QStringLiteral("DrawViewDraft source renderer and viewport direction/rotation");
+        else if (name == QStringLiteral("TechDraw_ExportPageDXF")) dependency = QStringLiteral("Official page DXF exporter and browser file delivery");
+        else if (name == QStringLiteral("TechDraw_ExportPageSVG")) dependency = QStringLiteral("MDIViewPage SVG scene export and browser file delivery");
+        else if (name == QStringLiteral("TechDraw_PageDefault")) dependency = QStringLiteral("Official default template selection and page/template creation");
+        else if (name == QStringLiteral("TechDraw_PageTemplate")) dependency = QStringLiteral("User template asset ingestion and page/template creation");
+        else if (name == QStringLiteral("TechDraw_PrintAll")) dependency = QStringLiteral("Rendered document pages and browser equivalent of MDIViewPage::printAllPages");
+        else if (name == QStringLiteral("TechDraw_ProjectShape")) dependency = QStringLiteral("Official projection task parameters and selected shape projection handler");
+        if (!dependency.isEmpty()) {
+            result.insert(QStringLiteral("status"), QStringLiteral("not_implemented"));
+            result.insert(QStringLiteral("code"), QStringLiteral("implementation_required"));
+            result.insert(QStringLiteral("message"), dependency);
+            return result;
+        }
+    }
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionLockUnlockView")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionExtendLine")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionShortenLine")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionExtendShortenLineGroup")
+    if (apiId.startsWith(QStringLiteral("TechDraw:desktop:"))
+        && (name == QStringLiteral("TechDraw_ExtensionLockUnlockView")
+            || name == QStringLiteral("TechDraw_ExtensionExtendLine")
+            || name == QStringLiteral("TechDraw_ExtensionShortenLine")
+            || name == QStringLiteral("TechDraw_ExtensionExtendShortenLineGroup"))) {
+        QJsonObject args = input.value(QStringLiteral("args")).toObject();
+        if (args.value(QStringLiteral("args")).isObject()) args = args.value(QStringLiteral("args")).toObject();
+        const bool lock = name == QStringLiteral("TechDraw_ExtensionLockUnlockView");
+        result.insert(QStringLiteral("parameterSchema"), lock
+            ? QStringLiteral("{document:string,selection:[viewName:string]}")
+            : QStringLiteral("{document:string,view:string,selection:[edgeName:string],lineStretch:number,iMsg?:0|1}"));
+        App::Document* document = nullptr;
+        bool transaction = false;
+        try {
+            if (apiId != QStringLiteral("TechDraw:desktop:") + name)
+                throw Base::RuntimeError("Desktop command ID/name mismatch");
+            const QString documentName = args.value(QStringLiteral("document")).toString();
+            if (documentName.isEmpty()) throw Base::RuntimeError("document handle is required");
+            document = App::GetApplication().getDocument(documentName.toUtf8().constData());
+            if (!document) throw Base::RuntimeError("Document does not exist");
+            const QJsonArray selection = args.value(QStringLiteral("selection")).toArray();
+            if (selection.isEmpty()) throw Base::RuntimeError("Selection is required");
+            QJsonObject typed;
+            typed.insert(QStringLiteral("document"), documentName);
+            if (lock) {
+                std::vector<TechDraw::DrawViewPart*> views;
+                QSet<QString> seen;
+                for (const auto& selected : selection) {
+                    const QString handle = selected.toString();
+                    auto* view = dynamic_cast<TechDraw::DrawViewPart*>(document->getObject(handle.toUtf8().constData()));
+                    if (!view) throw Base::RuntimeError("Selection must contain existing DrawViewPart handles");
+                    if (!seen.contains(handle)) { views.push_back(view); seen.insert(handle); }
+                }
+                document->openTransaction("Lock/Unlock View");
+                transaction = true;
+                QJsonArray changed;
+                for (auto* view : views) {
+                    view->LockPosition.setValue(!view->LockPosition.getValue());
+                    QJsonObject state;
+                    state.insert(QStringLiteral("view"), QString::fromUtf8(view->getNameInDocument()));
+                    state.insert(QStringLiteral("lockPosition"), view->LockPosition.getValue());
+                    changed.push_back(state);
+                }
+                typed.insert(QStringLiteral("views"), changed);
+            } else {
+                const QString viewName = args.value(QStringLiteral("view")).toString();
+                auto* view = dynamic_cast<TechDraw::DrawViewPart*>(document->getObject(viewName.toUtf8().constData()));
+                if (!view) throw Base::RuntimeError("view must identify an existing DrawViewPart");
+                bool extend = name != QStringLiteral("TechDraw_ExtensionShortenLine");
+                if (name == QStringLiteral("TechDraw_ExtensionExtendShortenLineGroup")) {
+                    const auto mode = args.value(QStringLiteral("iMsg"));
+                    if (!mode.isDouble() || (mode.toDouble() != 0.0 && mode.toDouble() != 1.0))
+                        throw Base::RuntimeError("iMsg must select extend (0) or shorten (1)");
+                    extend = mode.toInt() == 0;
+                }
+                const auto stretchValue = args.value(QStringLiteral("lineStretch"));
+                const double stretch = stretchValue.toDouble();
+                if (!stretchValue.isDouble() || !std::isfinite(stretch) || stretch <= 0.0)
+                    throw Base::RuntimeError("lineStretch must be a positive finite length");
+                const QString sub = selection.first().toString();
+                bool valid = false;
+                const int index = sub.mid(4).toInt(&valid);
+                if (!sub.startsWith(QStringLiteral("Edge")) || !valid || index < 1)
+                    throw Base::RuntimeError("Select a cosmetic straight Edge");
+                auto geometry = view->getGeomByIndex(index - 1);
+                auto line = std::dynamic_pointer_cast<TechDraw::Generic>(geometry);
+                if (!line || line->points.size() != 2 || !geometry->getCosmetic())
+                    throw Base::RuntimeError("Selected edge must be a cosmetic straight line or centerline");
+                const auto p0 = TechDraw::CosmeticVertex::makeCanonicalPointInverted(view, geometry->getStartPoint());
+                const auto p1 = TechDraw::CosmeticVertex::makeCanonicalPointInverted(view, geometry->getEndPoint());
+                const double length = (p1 - p0).Length();
+                if (!std::isfinite(length) || length <= 0.0 || (!extend && 2.0 * stretch >= length))
+                    throw Base::RuntimeError("Stretch would create a zero length or reversed line");
+                std::string tag = geometry->getCosmeticTag();
+                auto* edge = geometry->source() == TechDraw::SourceType::COSMETICEDGE ? view->getCosmeticEdge(tag) : nullptr;
+                auto* center = geometry->source() == TechDraw::SourceType::CENTERLINE ? view->getCenterLine(tag) : nullptr;
+                if (!edge && !center) throw Base::RuntimeError("Selected cosmetic object does not exist");
+                document->openTransaction("Extend/shorten line");
+                transaction = true;
+                if (center) {
+                    center->m_extendBy += extend ? stretch : -stretch;
+                    view->refreshCLGeoms();
+                    typed.insert(QStringLiteral("extendBy"), center->m_extendBy);
+                } else {
+                    const auto format = edge->format();
+                    const auto delta = (p1 - p0) * ((extend ? stretch : -stretch) / length);
+                    view->removeCosmeticEdge(std::vector<std::string>{tag});
+                    tag = view->addCosmeticEdge(p0 - delta, p1 + delta);
+                    auto* replacement = view->getCosmeticEdge(tag);
+                    if (!replacement) throw Base::RuntimeError("Cosmetic edge replacement failed");
+                    replacement->setFormat(format);
+                    view->refreshCEGeoms();
+                }
+                view->requestPaint();
+                typed.insert(QStringLiteral("view"), viewName);
+                typed.insert(QStringLiteral("tag"), QString::fromStdString(tag));
+                typed.insert(QStringLiteral("cosmeticEdgeCount"), static_cast<int>(view->CosmeticEdges.getValues().size()));
+            }
+            document->recompute();
+            document->commitTransaction();
+            transaction = false;
+            result.insert(QStringLiteral("result"), typed);
+            result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+            result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command"));
+        } catch (const Base::Exception& error) {
+            if (transaction) document->abortTransaction();
+            result.insert(QStringLiteral("status"), QStringLiteral("error"));
+            result.insert(QStringLiteral("code"), QStringLiteral("invalid_selection_or_operation"));
+            result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+        } catch (const std::exception& error) {
+            if (transaction) document->abortTransaction();
+            result.insert(QStringLiteral("status"), QStringLiteral("error"));
+            result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command_failed"));
+            result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+        }
+        result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
+        return result;
+    }
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionLineParallel")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionLinePerpendicular")
+    // FC_WEB_IMPLEMENTED_DESKTOP_COMMAND("TechDraw_ExtensionLinePPGroup")
+    if (apiId.startsWith(QStringLiteral("TechDraw:desktop:"))) {
+        const bool lineCommand = name == QStringLiteral("TechDraw_ExtensionLineParallel")
+            || name == QStringLiteral("TechDraw_ExtensionLinePerpendicular")
+            || name == QStringLiteral("TechDraw_ExtensionLinePPGroup");
+        static const QSet<QString> pendingCommands = {
+            QStringLiteral("TechDraw_CosmeticCircle"),
+            QStringLiteral("TechDraw_ExtensionArcLengthAnnotation"),
+            QStringLiteral("TechDraw_ExtensionAreaAnnotation"),
+            QStringLiteral("TechDraw_ExtensionChangeLineAttributes"),
+            QStringLiteral("TechDraw_ExtensionCircleCenterLines"),
+            QStringLiteral("TechDraw_ExtensionCircleCenterLinesGroup"),
+            QStringLiteral("TechDraw_ExtensionDrawCirclesGroup"),
+            QStringLiteral("TechDraw_ExtensionDrawCosmArc"),
+            QStringLiteral("TechDraw_ExtensionDrawCosmCircle"),
+            QStringLiteral("TechDraw_ExtensionDrawCosmCircle3Points"),
+            QStringLiteral("TechDraw_ExtensionSelectLineAttributes"),
+            QStringLiteral("TechDraw_ExtensionHoleCircle")
+        };
+        if (pendingCommands.contains(name)) {
+            result.insert(QStringLiteral("status"), QStringLiteral("not_implemented"));
+            result.insert(QStringLiteral("code"), QStringLiteral("implementation_required"));
+            QString dependency;
+            if (name.contains(QStringLiteral("Annotation")))
+                dependency = QStringLiteral("Selected projected geometry measurement and DrawViewBalloon creation/placement");
+            else if (name == QStringLiteral("TechDraw_ExtensionSelectLineAttributes"))
+                dependency = QStringLiteral("React line attribute task dialog and shared active line style/width/color/stretch state consumed by native edit commands");
+            else if (name.contains(QStringLiteral("Attributes")))
+                dependency = QStringLiteral("Selected cosmetic edge/centerline LineFormat mutation and refresh");
+            else if (name.contains(QStringLiteral("Extend")))
+                dependency = QStringLiteral("Selected line extension/shortening and cosmetic edge replacement");
+            else if (name.contains(QStringLiteral("CenterLines")) || name.contains(QStringLiteral("HoleCircle")))
+                dependency = QStringLiteral("Selected circle geometry and official centerline/bolt-circle construction");
+            else
+                dependency = QStringLiteral("Cosmetic circle/arc task parameters, selected-point construction and edit transaction");
+            result.insert(QStringLiteral("message"), dependency);
+            return result;
+        }
+        if (lineCommand) {
+            QJsonObject args = input.value(QStringLiteral("args")).toObject();
+            if (args.value(QStringLiteral("args")).isObject()) args = args.value(QStringLiteral("args")).toObject();
+            result.insert(QStringLiteral("parameterSchema"), QStringLiteral("{document:string,view:string,selection:[string,string],iMsg?:0|1}"));
+            App::Document* document = nullptr;
+            bool transaction = false;
+            try {
+                if (apiId != QStringLiteral("TechDraw:desktop:") + name)
+                    throw Base::RuntimeError("Desktop command ID/name mismatch");
+                const QString documentName = args.value(QStringLiteral("document")).toString();
+                const QString viewName = args.value(QStringLiteral("view")).toString();
+                if (documentName.isEmpty() || viewName.isEmpty())
+                    throw Base::RuntimeError("document and view handles are required");
+                document = App::GetApplication().getDocument(documentName.toUtf8().constData());
+                auto* view = document ? dynamic_cast<TechDraw::DrawViewPart*>(document->getObject(viewName.toUtf8().constData())) : nullptr;
+                if (!view) throw Base::RuntimeError("The selected document/view does not exist or is not a DrawViewPart");
+                bool parallel = name != QStringLiteral("TechDraw_ExtensionLinePerpendicular");
+                if (name == QStringLiteral("TechDraw_ExtensionLinePPGroup")) {
+                    const auto mode = args.value(QStringLiteral("iMsg"));
+                    if (!mode.isDouble() || (mode.toDouble() != 0.0 && mode.toDouble() != 1.0))
+                        throw Base::RuntimeError("iMsg must select parallel (0) or perpendicular (1)");
+                    parallel = mode.toInt() == 0;
+                }
+                const QJsonArray selection = args.value(QStringLiteral("selection")).toArray();
+                if (selection.size() != 2) throw Base::RuntimeError("Select one projected Edge and one Vertex");
+                int edgeIndex = -1, vertexIndex = -1;
+                for (const auto& selected : selection) {
+                    const QString sub = selected.toString();
+                    bool valid = false;
+                    if (sub.startsWith(QStringLiteral("Edge"))) {
+                        const int index = sub.mid(4).toInt(&valid);
+                        if (valid && index > 0) edgeIndex = index - 1;
+                    } else if (sub.startsWith(QStringLiteral("Vertex"))) {
+                        const int index = sub.mid(6).toInt(&valid);
+                        if (valid && index > 0) vertexIndex = index - 1;
+                    }
+                }
+                if (edgeIndex < 0 || vertexIndex < 0) throw Base::RuntimeError("Select one projected Edge and one Vertex");
+                auto geometry = view->getGeomByIndex(edgeIndex);
+                auto line = std::dynamic_pointer_cast<TechDraw::Generic>(geometry);
+                auto vertex = view->getProjVertexByIndex(vertexIndex);
+                if (!line || line->points.size() != 2 || !vertex)
+                    throw Base::RuntimeError("Selection must contain a straight edge and an existing vertex");
+                const auto start = TechDraw::CosmeticVertex::makeCanonicalPointInverted(view, line->points.at(0));
+                const auto end = TechDraw::CosmeticVertex::makeCanonicalPointInverted(view, line->points.at(1));
+                const auto point = vertex->point();
+                const auto center = TechDraw::CosmeticVertex::makeCanonicalPointInverted(view, Base::Vector3d(point.x, point.y, 0.0));
+                Base::Vector3d half = (end - start) / 2.0;
+                if (!std::isfinite(half.x) || !std::isfinite(half.y) || (half.x == 0.0 && half.y == 0.0))
+                    throw Base::RuntimeError("Selected edge has invalid or zero length");
+                if (!parallel) { const double x = half.x; half.x = -half.y; half.y = x; }
+                document->openTransaction("Cosmetic Line Parallel/Perpendicular");
+                transaction = true;
+                const std::string tag = view->addCosmeticEdge(TechDraw::CosmeticEdge::makeLineFromCanonicalPoints(center + half, center - half));
+                if (tag.empty() || !view->getCosmeticEdge(tag)) throw Base::RuntimeError("Cosmetic line creation failed");
+                view->refreshCEGeoms();
+                view->requestPaint();
+                document->recompute();
+                document->commitTransaction();
+                transaction = false;
+                QJsonObject typed;
+                typed.insert(QStringLiteral("document"), documentName);
+                typed.insert(QStringLiteral("view"), viewName);
+                typed.insert(QStringLiteral("tag"), QString::fromStdString(tag));
+                typed.insert(QStringLiteral("cosmeticEdgeCount"), static_cast<int>(view->CosmeticEdges.getValues().size()));
+                result.insert(QStringLiteral("result"), typed);
+                if (name == QStringLiteral("TechDraw_ExtensionLineParallel")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                } else if (name == QStringLiteral("TechDraw_ExtensionLinePerpendicular")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                } else if (name == QStringLiteral("TechDraw_ExtensionLinePPGroup")) {
+                    result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+                }
+                result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command"));
+                result.insert(QStringLiteral("returnSchema"), QStringLiteral("{document:string,view:string,tag:string,cosmeticEdgeCount:int}"));
+            } catch (const Base::Exception& error) {
+                if (transaction) document->abortTransaction();
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("invalid_selection_or_operation"));
+                result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+            } catch (const std::exception& error) {
+                if (transaction) document->abortTransaction();
+                result.insert(QStringLiteral("status"), QStringLiteral("error"));
+                result.insert(QStringLiteral("code"), QStringLiteral("native_desktop_command_failed"));
+                result.insert(QStringLiteral("message"), QString::fromUtf8(error.what()));
+            }
+            result.insert(QStringLiteral("resourcesReleased"), App::GetApplication().getDocuments().empty());
+            return result;
+        }
+    }
     if (apiId.startsWith(QStringLiteral("TechDraw:desktop:")) && !name.isEmpty()) {
         static const QSet<QString> desktopCommands = {QStringLiteral("TechDraw_ExtensionCascadeDimensionGroup"), QStringLiteral("TechDraw_ExtensionCascadeHorizDimension"), QStringLiteral("TechDraw_ExtensionCascadeObliqueDimension"), QStringLiteral("TechDraw_ExtensionCascadeVertDimension"), QStringLiteral("TechDraw_ExtensionChamferDimensionGroup"), QStringLiteral("TechDraw_ExtensionCreateChainDimensionGroup"), QStringLiteral("TechDraw_ExtensionCreateCoordDimensionGroup"), QStringLiteral("TechDraw_ExtensionCreateHorizChainDimension"), QStringLiteral("TechDraw_ExtensionCreateHorizChamferDimension"), QStringLiteral("TechDraw_ExtensionCreateHorizCoordDimension"), QStringLiteral("TechDraw_ExtensionCreateLengthArc"), QStringLiteral("TechDraw_ExtensionCreateObliqueChainDimension"), QStringLiteral("TechDraw_ExtensionCreateObliqueCoordDimension"), QStringLiteral("TechDraw_ExtensionCreateVertChainDimension"), QStringLiteral("TechDraw_ExtensionCreateVertChamferDimension"), QStringLiteral("TechDraw_ExtensionCreateVertCoordDimension")};
         if (!desktopCommands.contains(name)) { result.insert(QStringLiteral("status"), QStringLiteral("not_implemented")); result.insert(QStringLiteral("code"), QStringLiteral("unregistered_desktop_command")); result.insert(QStringLiteral("message"), QStringLiteral("TechDraw desktop command is not registered")); return result; }
@@ -1015,6 +1516,21 @@ EMSCRIPTEN_KEEPALIVE const char* fc_web_dispatch_json(const char* request)
     if (!document.isObject()) { pythonFamilyDispatchResponse = R"({"ok":false,"code":"invalid_request","error":"TechDraw native dispatch requires a JSON object"})"; return pythonFamilyDispatchResponse.c_str(); }
     const QJsonObject object = document.object();
     const QString command = object.value(QStringLiteral("cmd")).toString();
+    if (command == QStringLiteral("techdraw.createRecompute")) {
+        if (!object.value(QStringLiteral("args")).isObject()) {
+            pythonFamilyDispatchResponse = R"({"ok":false,"code":"invalid_request","error":"techdraw.createRecompute requires an args object"})";
+            return pythonFamilyDispatchResponse.c_str();
+        }
+        QJsonObject result = createDrawing(object.value(QStringLiteral("args")).toObject());
+        result.insert(QStringLiteral("cmd"), command);
+        if (result.value(QStringLiteral("ok")).toBool()) {
+            result.insert(QStringLiteral("status"), QStringLiteral("exposed"));
+            result.insert(QStringLiteral("native"), true);
+        }
+        pythonFamilyDispatchResponse = QJsonDocument(result)
+            .toJson(QJsonDocument::Compact).toStdString();
+        return pythonFamilyDispatchResponse.c_str();
+    }
     if (command == QStringLiteral("techdraw.pythonMethod")) {
         const QJsonObject args = object.value(QStringLiteral("args")).toObject();
         const QString schema = args.value(QStringLiteral("schema")).toString();