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+# FreeCAD 3D 自动布线设计方案
+
+本文档描述 QET / LightWork3D 与 FreeCAD 协同中的 3D 自动布线设计。
+
+当前版本目标不是完整复刻 EPLAN Pro Panel 或 SOLIDWORKS Electrical，而是先完成一个可用的最小闭环：
+
+```text
+工程端子
+-> 路由路径网络
+-> 自动求路
+-> 生成 3D 折线导线
+-> 可保存到 FreeCAD 文档
+```
+
+## 1. 设计边界
+
+### 1.1 当前版本目标
+
+当前版本只要求完成“能够自动布线”：
+
+1. 能识别 FreeCAD 文档中的工程端子。
+2. 能从用户指定的线槽、草图、面域创建路由网络。
+3. 能在两个端子之间自动生成 3D 折线导线。
+4. 能批量处理 QET 导入的导线任务。
+5. 能绕开或至少发现明显障碍碰撞。
+6. 默认禁止长距离悬空线。
+
+### 1.2 当前版本不做
+
+当前版本不做以下工程级能力：
+
+1. 不修改 FreeCAD C++ 源码。
+2. 不写入或依赖旧 3D 场景数据库表。
+3. 不把 3D 位姿、3D 路径点写入数据库。
+4. 不做完整线槽容量计算。
+5. 不做线径、弯曲半径、线束层叠排列。
+6. 不做强弱电隔离、EMC、屏蔽线等电气规则。
+7. 不保证达到 EPLAN / SOLIDWORKS Electrical 的完整工程级自动布线效果。
+
+### 1.3 数据库约束
+
+第一版严格遵守 `docs/数据库设计.md`：
+
+1. 设备绑定只依赖：
+
+```text
+project_2d3d_symbol_binding:
+  project_uuid
+  element_uuid
+  instance_id
+```
+
+2. 端子绑定只依赖：
+
+```text
+project_2d3d_terminal_binding:
+  project_uuid
+  terminal_uuid
+  instance_id
+```
+
+3. 3D 端子绑定唯一依据是：
+
+```text
+terminal_uuid
+```
+
+4. 3D 位姿、装配关系、布线几何以 FreeCAD 文档为准。
+
+## 2. 总体方案
+
+自动布线不直接在任意 3D 空间里找线，也不会把所有端子任意两两连接。它参考 EPLAN / SOLIDWORKS 的思路，先建立“可走路径网络”，再按 QET 导线任务中的起点端子和终点端子逐条求路。
+
+```text
+端子出线段
+  -> 进入最近路由节点
+  -> 在线槽/路由路径网络中求最短路
+  -> 从路由网络出来
+  -> 进入目标端子
+```
+
+路由网络由 `carrier` 组成。一个 carrier 表示一段可走线中心线或辅助路由区域中的一条网格线。
+
+### 2.1 路由优先级
+
+当前版本按下面优先级处理：
+
+1. `WireDuct`：线槽中心路径，最高优先级。
+2. `RoutingPath`：用户画的草图线、Draft Wire、明确选中的路由边。
+3. `AuxiliaryPath`：辅助路径，后续扩展使用。
+4. `RoutingRange`：选中面生成的辅助路由区域，成本较高，只用于过渡或没有线槽时兜底。
+
+普通机柜、设备外壳、实体边默认不是路由路径。
+
+## 3. FreeCAD 对象语义
+
+### 3.1 工程端子
+
+工程端子是可布线起点和终点，必须满足：
+
+```text
+Role = "Terminal"
+CanWire = true
+QetTerminalUuid = <2D terminal_uuid>
+QetInstanceId = <3D instance_id>
+QetProjectUuid = <project_uuid>
+```
+
+端子空间位置来自 FreeCAD 文档。自动布线使用端子的全局坐标和方向。
+
+### 3.2 路由路径 Carrier
+
+路由路径对象使用以下语义属性：
+
+```text
+QetRoutingRole = "RoutingCarrier"
+QetRouteCarrierKind = "WireDuct" | "RoutingPath" | "AuxiliaryPath" | "RoutingRange"
+CanRouteWire = true
+QetProjectUuid = <project_uuid>
+Points = [Vector, Vector, ...]
+```
+
+carrier 统一放在：
+
+```text
+QETWiring
+  02_Carriers
+```
+
+### 3.3 自动导线
+
+自动生成的导线放在：
+
+```text
+QETWiring
+  04_Routed
+```
+
+自动导线语义：
+
+```text
+RouteType = "AutoSuggested"
+RouteMode = "Auto"
+RouteStatus = "Routed" | "CollisionWarning"
+QetStartTerminalUuid
+QetEndTerminalUuid
+QetAutoRouteAlgorithm
+QetAutoRouteDiagnosticsJson
+```
+
+### 3.4 线槽实体
+
+当用户选择线槽实体并执行“从线槽实体生成中心路径”后：
+
+1. 系统按包围盒长轴生成 `WireDuct` 中心路径。
+2. 原线槽实体标记为可穿线路由源。
+3. 碰撞检测跳过该线槽实体本身，避免“线在槽内却撞到线槽外壳”的误报。
+
+线槽实体属性：
+
+```text
+QetRoutingSourceKind = "WireDuct"
+QetRoutingObstacleMode = "PassThrough"
+QetRouteCarrierName = <generated carrier name>
+```
+
+## 4. 算法设计
+
+### 4.1 路由网络构建
+
+模块：
+
+```text
+src/Mod/FreeCADExchange/RoutingNetwork.py
+```
+
+构建步骤：
+
+1. 收集所有 `QetRoutingRole = RoutingCarrier` 的对象。
+2. 读取 carrier 的 `Points`。
+3. 将相同或接近坐标的点合并为图节点。
+4. 将相邻点之间的线段建立为图边。
+5. 每条边记录所属 carrier，用于计算路径成本。
+
+### 4.2 最短路算法
+
+当前使用：
+
+```text
+Dijkstra + bend_penalty
+```
+
+路径成本：
+
+```text
+edge_cost = segment_length * carrier_kind_factor + bend_penalty
+```
+
+其中：
+
+```text
+WireDuct      = 1.0
+RoutingPath   = 1.0
+AuxiliaryPath = 2.0
+RoutingRange  = 8.0
+```
+
+这使算法优先走线槽和明确路由路径，尽量少走辅助面域。
+
+### 4.3 端子接入
+
+模块：
+
+```text
+src/Mod/FreeCADExchange/AutoRouting.py
+```
+
+流程：
+
+1. 读取起点端子和终点端子的全局坐标。
+2. 按端子方向生成短出线段。
+3. 找到距离起点出线点最近的路由节点。
+4. 找到距离终点出线点最近的路由节点。
+5. 在路由网络中执行 Dijkstra。
+6. 将端子出线段、网络路径、终点入线段拼成最终折线。
+
+当前算法名：
+
+```text
+network-dijkstra-v1
+```
+
+### 4.4 悬空线策略
+
+当前版本默认：
+
+```text
+allow_floating_fallback = false
+```
+
+也就是说，如果没有可用路由网络，系统不会生成长距离悬空线，而是提示用户先创建线槽路径、草图路径或辅助路由区域。
+
+调试时可以显式启用 fallback，但正式使用不建议开启。
+
+### 4.5 障碍物处理
+
+当前版本使用 AABB 包围盒做碰撞诊断：
+
+1. 收集 FreeCAD 文档中的几何对象。
+2. 排除端子、carrier、已布线导线、原点辅助对象。
+3. 排除标记为 `QetRoutingObstacleMode = PassThrough` 的线槽实体。
+4. 检查导线线段是否与障碍包围盒相交。
+5. 如果有碰撞，导线状态设为：
+
+```text
+RouteStatus = "CollisionWarning"
+```
+
+当前版本是“碰撞诊断”，不是完整自由空间避障。
+
+## 5. 当前已完成
+
+### 5.1 Python 模块
+
+已实现：
+
+```text
+src/Mod/FreeCADExchange/RoutingNetwork.py
+src/Mod/FreeCADExchange/AutoRouting.py
+src/Mod/FreeCADExchange/AutoRoutingPanel.py
+```
+
+并已加入：
+
+```text
+src/Mod/FreeCADExchange/CMakeLists.txt
+src/Mod/FreeCADExchange/InitGui.py
+```
+
+### 5.2 路由网络功能
+
+已完成：
+
+1. 从选中草图线、Draft Wire、明确选中的边创建 `RoutingPath`。
+2. 从选中线槽实体生成 `WireDuct` 中心路径。
+3. 从选中面生成 `RoutingRange` 辅助路由区域。
+4. 清除已生成路由路径。
+5. 扫描并统计路由网络。
+
+### 5.3 自动布线功能
+
+已完成：
+
+1. 两个选中端子之间自动布线。
+2. 根据导线任务批量自动布线。
+3. 使用 Dijkstra 求路。
+4. 支持转弯惩罚。
+5. 支持 carrier 类型成本。
+6. 默认禁止长距离悬空线。
+7. 碰撞检测和 `CollisionWarning` 状态。
+8. 自动导线可见显示并保存到 FreeCAD 文档。
+
+### 5.4 FreeCAD 面板
+
+面板入口：
+
+```text
+QET模板 -> 3D自动布线
+```
+
+当前按钮：
+
+```text
+扫描端子/网络
+从线槽实体生成中心路径
+从线槽/草图创建路由路径
+从选中面创建辅助路由区域
+测试布线选中两个端子
+按导线任务自动布线全部
+清除自动布线
+清除走线路径
+保存
+```
+
+### 5.5 测试
+
+已完成单元测试：
+
+```text
+tests/python/freecad_exchange_auto_routing_test.py
+```
+
+覆盖：
+
+1. 无路由网络时默认拒绝悬空线。
+2. 显式调试 fallback 时生成正交路径。
+3. 优先使用用户路由网络。
+4. 优先使用 `WireDuct`，降低 `RoutingRange` 优先级。
+5. 从选中面生成辅助路由区域。
+6. 选中整个实体不会把所有外壳边转成路径。
+7. 从线槽实体生成中心路径。
+8. 线槽实体不作为自身路径碰撞障碍。
+9. 碰撞状态标记。
+10. 批量导线任务缺端子时跳过。
+11. 清除路由路径不删除已布线导线。
+
+已完成 FreeCAD smoke：
+
+```text
+tests/manual/freecad_auto_routing_smoke.py
+```
+
+## 6. 当前使用流程
+
+### 6.1 单条导线自动布线
+
+```text
+1. 打开 FreeCAD 工程 scene.FCStd
+2. 进入 QET模板 -> 3D自动布线
+3. 清除走线路径
+4. 选中线槽实体
+5. 点击“从线槽实体生成中心路径”
+6. 必要时选草图线或 Draft Wire，点击“从线槽/草图创建路由路径”
+7. 必要时选背板/门板面，点击“从选中面创建辅助路由区域”
+8. 选中两个工程端子
+9. 点击“测试布线选中两个端子”
+```
+
+### 6.2 批量导线自动布线
+
+前提：
+
+1. QET 导出的 `2d_to_3d.json` 中包含 `wires[]`。
+2. 每条导线包含：
+
+```text
+start_terminal_uuid
+end_terminal_uuid
+```
+
+3. FreeCAD 文档中存在对应 `QetTerminalUuid` 的工程端子。
+
+操作：
+
+```text
+1. 创建线槽/路由网络
+2. 点击“按导线任务自动布线全部”
+```
+
+注意：批量自动布线的依据是导线任务，不是“所有端子自动互连”。如果文档中只有端子而没有 `wires[]` 或 `QETWiring_01_Tasks`，系统不能判断哪些端子应该连接。
+
+## 7. 当前限制
+
+当前版本可完成自动布线原型，但仍有以下限制：
+
+1. 线槽实体中心线生成基于包围盒长轴，不理解真实线槽开口、盖板和内部空间。
+2. 多根线会沿同一路径生成，暂未做并行错位排列。
+3. 未计算线槽填充率和容量。
+4. 未考虑线径、最小弯曲半径。
+5. 未做强弱电分槽、线缆类型隔离。
+6. 障碍检测基于 AABB，存在误报和漏报。
+7. 辅助路由区域是网格近似，不等于专业软件的完整布线区域建模。
+8. 端子出线方向依赖端子 LCS 方向；如果模板端子方向不准，自动布线会受影响。
+9. 导线几何当前保存在 FreeCAD 文档，不作为第一版数据库字段回写。
+
+## 8. 后续需要完成
+
+### 8.1 近期优先级
+
+1. 线槽语义库
+
+```text
+WireDuct:
+  centerline
+  width
+  height
+  inlet/outlet
+  usable_area
+  cover_state
+```
+
+2. 多根线错位排列
+
+```text
+同一路径上的多根导线按 lane_offset 排列
+避免完全重叠
+```
+
+3. 线槽容量和填充率
+
+```text
+按线径估算截面积
+计算 duct fill ratio
+超过阈值给出警告
+```
+
+4. 端子出线规则
+
+```text
+根据端子 LCS 方向、设备安装面、接线孔方向生成更合理的短出线段
+```
+
+### 8.2 中期能力
+
+1. 真实几何碰撞检测
+
+从 AABB 升级到更精确的 Shape / BRep 碰撞检测，降低误报。
+
+2. 弯曲半径约束
+
+根据线缆类型和线径控制转弯半径。
+
+3. 线束对象
+
+把多根同路导线抽象成 bundle，并支持展开显示。
+
+4. 规则约束
+
+支持：
+
+```text
+强电 / 弱电隔离
+PE 线优先路径
+屏蔽线规则
+不同电压等级分槽
+禁布区域
+```
+
+5. 更智能的线槽识别
+
+根据对象名称、尺寸比例、设备库语义自动识别线槽，而不完全依赖用户选择。
+
+### 8.3 长期能力
+
+1. 接近 EPLAN / SOLIDWORKS 的工程级路由器。
+2. 完整导线长度统计。
+3. 自动生成线束报表。
+4. 2D / 3D 导线一致性校验。
+5. 自动推荐线槽路径和线槽容量。
+6. 多柜体、多门板、多安装板之间的跨区域路由。
+7. 可视化布线诊断面板。
+
+## 9. 验收标准
+
+当前版本验收只看“能否自动布线”：
+
+1. 文档中有至少两个工程端子。
+2. 文档中有至少一条 `WireDuct` 或 `RoutingPath` carrier。
+3. 选择两个端子后执行单线测试布线，能生成 `AutoSuggested` 导线。
+4. 存在导线任务时执行“按导线任务自动布线全部”，能批量生成 `AutoSuggested` 导线。
+5. 生成导线在 `QETWiring_04_Routed` 下可见。
+6. 没有路由网络时不生成长距离悬空线。
+7. 没有导线任务时，批量布线明确提示缺少连接关系。
+8. 明显碰撞时状态为 `CollisionWarning`。
+9. 保存 FreeCAD 文档后，自动导线和路由网络仍保留。
+
+## 10. 开发验证命令
+
+单元测试：
+
+```powershell
+D:\FreeCAD-1.1.1\bin\python.exe -m unittest discover -s tests\python -p "freecad_exchange*_test.py"
+```
+
+真实 FreeCAD smoke：
+
+```powershell
+D:\FreeCAD-1.1.1\bin\python.exe tests\manual\freecad_auto_routing_smoke.py
+```
+
+语法检查：
+
+```powershell
+D:\FreeCAD-1.1.1\bin\python.exe -m py_compile src\Mod\FreeCADExchange\AutoRouting.py src\Mod\FreeCADExchange\RoutingNetwork.py src\Mod\FreeCADExchange\AutoRoutingPanel.py
+```
diff --git a/src/Mod/FreeCADExchange/AutoRouting.py b/src/Mod/FreeCADExchange/AutoRouting.py
new file mode 100644
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+# FreeCADExchange 3D automatic wiring.
+#
+# 第一版不碰 C++，也不把 3D 走线结果写进数据库。
+# 它只读取 FreeCAD 文档里的端子、走线网络和几何障碍，
+# 然后在 QETWiring_04_Routed 下生成一条可见的折线导线。
+
+import json
+
+import FreeCAD as App
+
+try:
+    import FreeCADGui as Gui
+except ImportError:
+    Gui = None
+
+import RoutingNetwork
+import TerminalObjects
+import WiringObjects
+
+
+DEFAULT_OPTIONS = {
+    # 端子出来先走一小段，避免导线贴着设备外壳起步。
+    "terminal_exit_length": 20.0,
+    # 没有线槽网络时，退回到这个方向抬高/偏移后做正交折线。
+    "clearance_axis": "z",
+    "clearance": 80.0,
+    "lane_axis": "y",
+    "lane_spacing": 10.0,
+    # 线槽网络相关参数。
+    "use_routing_network": True,
+    "network_entry_max_distance": 0.0,
+    "bend_penalty": 25.0,
+    # EPLAN/SOLIDWORKS 风格：线槽/路由路径最优先，辅助面域只作为过渡/兜底区域。
+    "carrier_kind_cost_factors": {
+        "WireDuct": 1.0,
+        "RoutingPath": 1.0,
+        "UserPath": 1.0,
+        "AuxiliaryPath": 2.0,
+        "RoutingRange": 8.0,
+        "SurfaceGrid": 8.0,
+    },
+    # 默认不再生成长距离悬空 fallback；主干必须走 carrier/贴面网络。
+    "allow_floating_fallback": False,
+    # 障碍包围盒会按这个距离膨胀，用于提前发现贴碰风险。
+    "obstacle_clearance": 5.0,
+    "replace_existing": True,
+}
+
+
+class AutoRoutingError(RuntimeError):
+    pass
+
+
+def _merged_options(options):
+    merged = dict(DEFAULT_OPTIONS)
+    if isinstance(options, dict):
+        merged.update(options)
+    return merged
+
+
+def _vector(point):
+    if isinstance(point, App.Vector):
+        return App.Vector(point.x, point.y, point.z)
+    if isinstance(point, (list, tuple)) and len(point) >= 3:
+        return App.Vector(float(point[0]), float(point[1]), float(point[2]))
+    if isinstance(point, dict):
+        return App.Vector(
+            float(point.get("x", 0.0)),
+            float(point.get("y", 0.0)),
+            float(point.get("z", 0.0)),
+        )
+    if all(hasattr(point, name) for name in ("x", "y", "z")):
+        return App.Vector(float(point.x), float(point.y), float(point.z))
+    return App.Vector(0, 0, 0)
+
+
+def _distance(left, right):
+    dx = float(left.x) - float(right.x)
+    dy = float(left.y) - float(right.y)
+    dz = float(left.z) - float(right.z)
+    return (dx * dx + dy * dy + dz * dz) ** 0.5
+
+
+def _vector_close(left, right, tolerance=0.000001):
+    return _distance(left, right) <= tolerance
+
+
+def _point_payload(point):
+    return {
+        "x": float(point.x),
+        "y": float(point.y),
+        "z": float(point.z),
+    }
+
+
+def _append_unique(points, point):
+    vector = _vector(point)
+    if not points or not _vector_close(points[-1], vector):
+        points.append(vector)
+
+
+def _axis_value(point, axis):
+    return float(getattr(point, axis, 0.0))
+
+
+def _with_axis(point, axis, value):
+    return App.Vector(
+        float(value) if axis == "x" else float(point.x),
+        float(value) if axis == "y" else float(point.y),
+        float(value) if axis == "z" else float(point.z),
+    )
+
+
+def _orthogonal_points(start_point, end_point, preferred_axis=None):
+    if _vector_close(start_point, end_point):
+        return [start_point]
+
+    # 每一段只沿一个坐标轴移动，这样生成的线天然是机柜布线常见的折线。
+    axis_order = sorted(
+        ("x", "y", "z"),
+        key=lambda axis: abs(_axis_value(end_point, axis) - _axis_value(start_point, axis)),
+        reverse=True,
+    )
+    if preferred_axis in {"x", "y", "z"}:
+        axis_order = [axis for axis in axis_order if axis != preferred_axis]
+        axis_order.append(preferred_axis)
+
+    points = [start_point]
+    current = start_point
+    for axis in axis_order:
+        target = _axis_value(end_point, axis)
+        if abs(_axis_value(current, axis) - target) <= 0.000001:
+            continue
+        current = _with_axis(current, axis, target)
+        _append_unique(points, current)
+    _append_unique(points, end_point)
+    return points
+
+
+def _append_orthogonal(points, target_point, preferred_axis=None):
+    if not points:
+        _append_unique(points, target_point)
+        return
+    segment = _orthogonal_points(points[-1], _vector(target_point), preferred_axis)
+    for point in segment[1:]:
+        _append_unique(points, point)
+
+
+def _offset(point, direction, distance):
+    return App.Vector(
+        float(point.x) + float(direction.x) * float(distance),
+        float(point.y) + float(direction.y) * float(distance),
+        float(point.z) + float(direction.z) * float(distance),
+    )
+
+
+def _terminal_origin(terminal):
+    return _vector(TerminalObjects.terminal_origin(terminal))
+
+
+def _terminal_direction(terminal):
+    try:
+        return _vector(TerminalObjects.terminal_direction(terminal))
+    except Exception:
+        return App.Vector(0, 0, 1)
+
+
+def _project_uuid(doc, start_terminal=None, end_terminal=None):
+    for obj in (start_terminal, end_terminal):
+        value = (getattr(obj, "QetProjectUuid", "") or "").strip()
+        if value:
+            return value
+    try:
+        return (getattr(TerminalObjects.ensure_root_group(doc), "QetProjectUuid", "") or "").strip()
+    except Exception:
+        return ""
+
+
+def index_terminals(doc):
+    """Return {terminal_uuid: terminal_object} for routable engineering terminals."""
+    if doc is None:
+        return {}
+
+    terminals = []
+    root = None
+    try:
+        root = doc.getObject(TerminalObjects.ROOT_GROUP_NAME)
+    except Exception:
+        root = None
+    if root is not None:
+        terminals.extend(TerminalObjects.collect_terminal_objects(root))
+
+    terminals.extend(
+        obj
+        for obj in list(getattr(doc, "Objects", []) or [])
+        if TerminalObjects.is_terminal_object(obj)
+    )
+
+    indexed = {}
+    for terminal in terminals:
+        terminal_uuid = (getattr(terminal, "QetTerminalUuid", "") or "").strip()
+        if terminal_uuid and terminal_uuid not in indexed:
+            indexed[terminal_uuid] = terminal
+    return indexed
+
+
+def _wire_object_name(start_terminal, end_terminal, wire_uuid=""):
+    if wire_uuid:
+        return "QETAutoWire_{0}".format(TerminalObjects.safe_token(wire_uuid))
+    return "QETAutoWire_{0}_{1}".format(
+        TerminalObjects.safe_token(getattr(start_terminal, "QetTerminalUuid", "")),
+        TerminalObjects.safe_token(getattr(end_terminal, "QetTerminalUuid", "")),
+    )
+
+
+def _unique_name(doc, base_name):
+    name = TerminalObjects.safe_token(base_name)
+    if doc.getObject(name) is None:
+        return name
+    suffix = 1
+    while doc.getObject("{0}_{1}".format(name, suffix)) is not None:
+        suffix += 1
+    return "{0}_{1}".format(name, suffix)
+
+
+def _create_wire_geometry(doc, name, points):
+    if getattr(App, "ActiveDocument", None) is doc:
+        try:
+            import Draft
+
+            obj = Draft.make_wire(
+                points,
+                closed=False,
+                placement=None,
+                face=None,
+                support=None,
+                bs2wire=False,
+            )
+            if obj is not None:
+                _set_points(obj, points)
+                return obj
+        except Exception:
+            pass
+
+    import Part
+
+    obj = doc.addObject("Part::Feature", name)
+    obj.Shape = Part.makePolygon(points)
+    _set_points(obj, points)
+    return obj
+
+
+def _set_points(obj, points):
+    try:
+        if "Points" not in getattr(obj, "PropertiesList", []):
+            obj.addProperty("App::PropertyVectorList", "Points", "QET Wiring", "Auto route points")
+        obj.Points = list(points)
+    except Exception:
+        pass
+
+
+def _set_string(obj, name, value, description="Auto-routing property"):
+    TerminalObjects.ensure_string_property(obj, name, "QET Routing", description, value)
+
+
+def _route_payload(route_data, collisions):
+    return {
+        "algorithm": route_data.get("algorithm", ""),
+        "points": [_point_payload(point) for point in route_data.get("points", [])],
+        "collisions": collisions,
+        "network": route_data.get("network", {}),
+    }
+
+
+def _set_auto_metadata(wire, route_data, collisions):
+    _set_string(
+        wire,
+        "QetAutoRouteAlgorithm",
+        route_data.get("algorithm", ""),
+        "Auto-routing algorithm used for this wire",
+    )
+    _set_string(
+        wire,
+        "QetAutoRouteDiagnosticsJson",
+        json.dumps(_route_payload(route_data, collisions), ensure_ascii=False),
+        "Auto-routing diagnostics",
+    )
+    if route_data.get("network"):
+        _set_string(
+            wire,
+            "QetAutoRouteNetworkJson",
+            json.dumps(route_data.get("network", {}), ensure_ascii=False),
+            "Route network metadata used by this wire",
+        )
+
+
+def build_orthogonal_route(start_terminal, end_terminal, route_index=0, options=None):
+    opts = _merged_options(options)
+    start_origin = _terminal_origin(start_terminal)
+    end_origin = _terminal_origin(end_terminal)
+    exit_length = max(float(opts.get("terminal_exit_length", 0.0) or 0.0), 0.0)
+    start_exit = _offset(start_origin, _terminal_direction(start_terminal), exit_length)
+    end_exit = _offset(end_origin, _terminal_direction(end_terminal), exit_length)
+
+    clearance_axis = (opts.get("clearance_axis") or "z").lower()
+    if clearance_axis not in {"x", "y", "z"}:
+        clearance_axis = "z"
+    lane_axis = (opts.get("lane_axis") or "y").lower()
+    if lane_axis not in {"x", "y", "z"}:
+        lane_axis = "y"
+
+    clearance_value = max(
+        _axis_value(start_exit, clearance_axis),
+        _axis_value(end_exit, clearance_axis),
+    ) + float(opts.get("clearance", 0.0) or 0.0)
+
+    lane_offset = float(route_index or 0) * float(opts.get("lane_spacing", 0.0) or 0.0)
+    lane_point = _with_axis(start_exit, clearance_axis, clearance_value)
+    lane_point = _with_axis(lane_point, lane_axis, _axis_value(lane_point, lane_axis) + lane_offset)
+    end_lane = _with_axis(end_exit, clearance_axis, clearance_value)
+    end_lane = _with_axis(end_lane, lane_axis, _axis_value(end_lane, lane_axis) + lane_offset)
+
+    points = []
+    _append_unique(points, start_origin)
+    _append_unique(points, start_exit)
+    _append_orthogonal(points, lane_point, preferred_axis=clearance_axis)
+    _append_orthogonal(points, end_lane)
+    _append_orthogonal(points, end_exit, preferred_axis=clearance_axis)
+    _append_unique(points, end_origin)
+
+    return {
+        "algorithm": "orthogonal-v1",
+        "points": points,
+        "network": {},
+    }
+
+
+def build_network_route(start_terminal, end_terminal, route_index=0, options=None, doc=None):
+    opts = _merged_options(options)
+    if not opts.get("use_routing_network", True):
+        return None
+    if doc is None:
+        doc = getattr(start_terminal, "Document", None) or getattr(App, "ActiveDocument", None)
+    if doc is None:
+        return None
+
+    network = RoutingNetwork.build_route_graph(doc)
+    if network.get("segment_count", 0) <= 0:
+        return None
+
+    exit_length = max(float(opts.get("terminal_exit_length", 0.0) or 0.0), 0.0)
+    start_origin = _terminal_origin(start_terminal)
+    end_origin = _terminal_origin(end_terminal)
+    start_exit = _offset(start_origin, _terminal_direction(start_terminal), exit_length)
+    end_exit = _offset(end_origin, _terminal_direction(end_terminal), exit_length)
+
+    start_key, start_distance = RoutingNetwork.nearest_node(network, start_exit)
+    end_key, end_distance = RoutingNetwork.nearest_node(network, end_exit)
+    if start_key is None or end_key is None:
+        return None
+
+    max_distance = float(opts.get("network_entry_max_distance", 0.0) or 0.0)
+    if max_distance > 0.0 and (
+        float(start_distance or 0.0) > max_distance
+        or float(end_distance or 0.0) > max_distance
+    ):
+        return None
+
+    path_keys = RoutingNetwork.shortest_path(
+        network,
+        start_key,
+        end_key,
+        bend_penalty=float(opts.get("bend_penalty", 0.0) or 0.0),
+        kind_cost_factors=opts.get("carrier_kind_cost_factors", {}),
+    )
+    if not path_keys:
+        return None
+
+    carrier_points = RoutingNetwork.path_points(network, path_keys)
+    if not carrier_points:
+        return None
+
+    points = []
+    _append_unique(points, start_origin)
+    _append_unique(points, start_exit)
+    _append_orthogonal(points, carrier_points[0])
+    for point in carrier_points[1:]:
+        _append_unique(points, point)
+    _append_orthogonal(points, end_exit)
+    _append_unique(points, end_origin)
+
+    return {
+        "algorithm": "network-dijkstra-v1",
+        "points": points,
+        "network": {
+            "carriers": int(network.get("carrier_count", 0)),
+            "segments": int(network.get("segment_count", 0)),
+            "nodes": len(network.get("nodes", {})),
+            "entry_distance": float(start_distance or 0.0),
+            "exit_distance": float(end_distance or 0.0),
+        },
+    }
+
+
+def _is_group(obj):
+    try:
+        return bool(obj.isDerivedFrom("App::DocumentObjectGroup"))
+    except Exception:
+        return False
+
+
+def _is_origin_helper(obj):
+    type_id = (getattr(obj, "TypeId", "") or "").lower()
+    name = (getattr(obj, "Name", "") or "").lower()
+    label = (getattr(obj, "Label", "") or "").lower()
+    compact_name = "".join(ch for ch in name if not ch.isdigit()).replace("-", "_")
+    compact_label = "".join(ch for ch in label if not ch.isdigit()).replace("-", "_")
+    helper_names = {
+        "origin",
+        "xy_plane",
+        "xz_plane",
+        "yz_plane",
+        "x_axis",
+        "y_axis",
+        "z_axis",
+    }
+    if "origin" in type_id or compact_name in helper_names:
+        return True
+    return compact_label in helper_names or compact_label.replace(" ", "_") in helper_names
+
+
+def _bbox_payload(obj, clearance=0.0):
+    shape = getattr(obj, "Shape", None)
+    bbox = getattr(shape, "BoundBox", None)
+    if bbox is None:
+        return None
+    return {
+        "xmin": float(bbox.XMin) - clearance,
+        "xmax": float(bbox.XMax) + clearance,
+        "ymin": float(bbox.YMin) - clearance,
+        "ymax": float(bbox.YMax) + clearance,
+        "zmin": float(bbox.ZMin) - clearance,
+        "zmax": float(bbox.ZMax) + clearance,
+    }
+
+
+def collect_obstacles(doc, exclude=None, options=None):
+    opts = _merged_options(options)
+    excluded = set(id(obj) for obj in (exclude or []) if obj is not None)
+    clearance = float(opts.get("obstacle_clearance", 0.0) or 0.0)
+    obstacles = []
+    for obj in list(getattr(doc, "Objects", []) or []):
+        if id(obj) in excluded:
+            continue
+        obstacle_mode = (getattr(obj, "QetRoutingObstacleMode", "") or "").strip()
+        if obstacle_mode in {"PassThrough", "WireDuctPassThrough"}:
+            continue
+        if _is_group(obj) or _is_origin_helper(obj):
+            continue
+        if TerminalObjects.is_lcs_like(obj) or TerminalObjects.is_terminal_object(obj):
+            continue
+        if RoutingNetwork.is_route_carrier(obj) or WiringObjects.is_routed_wire_object(obj):
+            continue
+        bbox = _bbox_payload(obj, clearance=clearance)
+        if bbox is None:
+            continue
+        obstacles.append(
+            {
+                "name": getattr(obj, "Name", ""),
+                "label": getattr(obj, "Label", ""),
+                "type_id": getattr(obj, "TypeId", ""),
+                "bbox": bbox,
+            }
+        )
+    return obstacles
+
+
+def _segment_intersects_bbox(start, end, bbox):
+    # Slab intersection: 把线段参数化为 start + t*(end-start)，t 在 [0, 1] 内相交即命中。
+    t_min = 0.0
+    t_max = 1.0
+    for axis, min_key, max_key in (
+        ("x", "xmin", "xmax"),
+        ("y", "ymin", "ymax"),
+        ("z", "zmin", "zmax"),
+    ):
+        start_value = _axis_value(start, axis)
+        end_value = _axis_value(end, axis)
+        delta = end_value - start_value
+        low = float(bbox[min_key])
+        high = float(bbox[max_key])
+        if abs(delta) <= 0.000001:
+            if start_value < low or start_value > high:
+                return False
+            continue
+        inv = 1.0 / delta
+        near = (low - start_value) * inv
+        far = (high - start_value) * inv
+        if near > far:
+            near, far = far, near
+        t_min = max(t_min, near)
+        t_max = min(t_max, far)
+        if t_min > t_max:
+            return False
+    return True
+
+
+def detect_collisions(points, obstacles):
+    collisions = []
+    for index in range(max(len(points) - 1, 0)):
+        start = points[index]
+        end = points[index + 1]
+        for obstacle in obstacles:
+            if _segment_intersects_bbox(start, end, obstacle["bbox"]):
+                collisions.append(
+                    {
+                        "segment_index": index,
+                        "obstacle_name": obstacle.get("name", ""),
+                        "obstacle_label": obstacle.get("label", ""),
+                    }
+                )
+    return collisions
+
+
+def _remove_existing_auto_routes(doc, start_uuid, end_uuid, wire_uuid=""):
+    removed = 0
+    for obj in list(WiringObjects.iter_routed_wire_objects(doc)):
+        if (getattr(obj, "RouteType", "") or "").strip() != "AutoSuggested":
+            continue
+        if wire_uuid and (getattr(obj, "QetWireUuid", "") or "").strip() != wire_uuid:
+            continue
+        same_direction = (
+            (getattr(obj, "QetStartTerminalUuid", "") or "").strip() == start_uuid
+            and (getattr(obj, "QetEndTerminalUuid", "") or "").strip() == end_uuid
+        )
+        reverse_direction = (
+            (getattr(obj, "QetStartTerminalUuid", "") or "").strip() == end_uuid
+            and (getattr(obj, "QetEndTerminalUuid", "") or "").strip() == start_uuid
+        )
+        if not same_direction and not reverse_direction:
+            continue
+        try:
+            doc.removeObject(obj.Name)
+            removed += 1
+        except Exception:
+            pass
+    return removed
+
+
+def _find_task_by_wire_uuid(doc, wire_uuid):
+    if not wire_uuid:
+        return None
+    try:
+        task_group = doc.getObject("QETWiring_01_Tasks")
+    except Exception:
+        task_group = None
+    if task_group is None:
+        return None
+    for task in list(getattr(task_group, "Group", []) or []):
+        if (getattr(task, "QetWireUuid", "") or "").strip() == wire_uuid:
+            return task
+    return None
+
+
+def _set_task_status(task, status):
+    if task is None:
+        return
+    TerminalObjects.ensure_string_property(
+        task,
+        "RouteStatus",
+        "QET Wiring",
+        "Wire task route status",
+        status,
+    )
+
+
+def _style_wire(wire, collision_count=0):
+    try:
+        wire.ViewObject.Visibility = True
+        wire.ViewObject.LineWidth = 3.0
+        if collision_count:
+            wire.ViewObject.LineColor = (1.0, 0.1, 0.0)
+        else:
+            wire.ViewObject.LineColor = (0.0, 0.35, 1.0)
+    except Exception:
+        pass
+
+
+def route_between_terminals(
+    doc,
+    start_terminal,
+    end_terminal,
+    route_index=0,
+    options=None,
+    wire_uuid="",
+    wire_label="",
+    net_uuid="",
+    group_uuid="",
+    wire_mark="",
+    wire_mark_is_manual=False,
+):
+    if doc is None:
+        raise AutoRoutingError("No FreeCAD document is available.")
+    if not TerminalObjects.is_terminal_object(start_terminal):
+        raise AutoRoutingError("Start object is not a routable terminal.")
+    if not TerminalObjects.is_terminal_object(end_terminal):
+        raise AutoRoutingError("End object is not a routable terminal.")
+    if start_terminal == end_terminal:
+        raise AutoRoutingError("Start and end terminal must be different.")
+
+    opts = _merged_options(options)
+    start_uuid = (getattr(start_terminal, "QetTerminalUuid", "") or "").strip()
+    end_uuid = (getattr(end_terminal, "QetTerminalUuid", "") or "").strip()
+    project_uuid = _project_uuid(doc, start_terminal, end_terminal)
+    if not project_uuid:
+        raise AutoRoutingError("Project UUID is required for auto-routing.")
+
+    if opts.get("replace_existing", True):
+        _remove_existing_auto_routes(doc, start_uuid, end_uuid, wire_uuid=wire_uuid)
+
+    route_data = build_network_route(
+        start_terminal,
+        end_terminal,
+        route_index=route_index,
+        options=opts,
+        doc=doc,
+    )
+    if route_data is None:
+        if not opts.get("allow_floating_fallback", False):
+            raise AutoRoutingError(
+                "没有可用的线槽/路由路径网络；请先选择线槽中心线、草图路径或必要的辅助路由区域。"
+            )
+        route_data = build_orthogonal_route(
+            start_terminal,
+            end_terminal,
+            route_index=route_index,
+            options=opts,
+        )
+
+    points = route_data.get("points", [])
+    if len(points) < 2:
+        raise AutoRoutingError("Auto-routing produced fewer than two points.")
+
+    obstacles = collect_obstacles(doc, exclude=[start_terminal, end_terminal], options=opts)
+    collisions = detect_collisions(points, obstacles)
+    status = "CollisionWarning" if collisions else "Routed"
+
+    wire_name = _unique_name(doc, _wire_object_name(start_terminal, end_terminal, wire_uuid))
+    wire = _create_wire_geometry(doc, wire_name, points)
+    wire.Label = wire_label or wire_mark or wire_uuid or "QET Auto Wire"
+    WiringObjects.set_routed_wire_semantics(
+        wire,
+        project_uuid,
+        wire_uuid,
+        wire_label or wire_mark or wire_uuid,
+        start_uuid,
+        end_uuid,
+        (getattr(start_terminal, "QetInstanceId", "") or "").strip(),
+        (getattr(end_terminal, "QetInstanceId", "") or "").strip(),
+        route_type="AutoSuggested",
+        route_status=status,
+        route_mode="Auto",
+        net_uuid=net_uuid,
+        group_uuid=group_uuid,
+        wire_mark=wire_mark,
+        wire_mark_is_manual=wire_mark_is_manual,
+    )
+    _set_auto_metadata(wire, route_data, collisions)
+
+    routed_group = WiringObjects.ensure_routed_group(doc, project_uuid)
+    if wire not in getattr(routed_group, "Group", []):
+        routed_group.addObject(wire)
+    try:
+        routed_group.ViewObject.Visibility = True
+    except Exception:
+        pass
+    _style_wire(wire, collision_count=len(collisions))
+
+    task = _find_task_by_wire_uuid(doc, wire_uuid)
+    _set_task_status(task, status)
+
+    try:
+        doc.recompute()
+    except Exception:
+        pass
+
+    return {
+        "wire": wire,
+        "route_status": status,
+        "algorithm": route_data.get("algorithm", ""),
+        "points": points,
+        "collision_count": len(collisions),
+        "collisions": collisions,
+    }
+
+
+def _wire_item_value(item, *names):
+    if not isinstance(item, dict):
+        return ""
+    for name in names:
+        value = item.get(name, "")
+        if value is not None and str(value).strip():
+            return str(value).strip()
+    return ""
+
+
+def route_all_from_payload(doc, payload, options=None):
+    if doc is None:
+        raise AutoRoutingError("No FreeCAD document is available.")
+    if not isinstance(payload, dict):
+        raise AutoRoutingError("Exchange payload must be an object.")
+
+    terminals = index_terminals(doc)
+    wires = payload.get("wires", []) or []
+    report = {
+        "total_wires": len(wires),
+        "routed": 0,
+        "collision_warnings": 0,
+        "skipped_missing_terminal": 0,
+        "skipped_invalid": 0,
+        "errors": [],
+        "routes": [],
+    }
+
+    for index, item in enumerate(wires):
+        if not isinstance(item, dict):
+            report["skipped_invalid"] += 1
+            continue
+        start_uuid = _wire_item_value(item, "start_terminal_uuid")
+        end_uuid = _wire_item_value(item, "end_terminal_uuid")
+        start_terminal = terminals.get(start_uuid)
+        end_terminal = terminals.get(end_uuid)
+        if start_terminal is None or end_terminal is None:
+            report["skipped_missing_terminal"] += 1
+            continue
+        try:
+            result = route_between_terminals(
+                doc,
+                start_terminal,
+                end_terminal,
+                route_index=index,
+                options=options,
+                wire_uuid=_wire_item_value(item, "wire_id", "wire_uuid", "id"),
+                wire_label=_wire_item_value(item, "wire_label", "wire_mark"),
+                net_uuid=_wire_item_value(item, "net_uuid"),
+                group_uuid=_wire_item_value(item, "group_uuid"),
+                wire_mark=_wire_item_value(item, "wire_mark"),
+                wire_mark_is_manual=bool(item.get("wire_mark_is_manual", False)),
+            )
+        except Exception as exc:
+            report["errors"].append(str(exc))
+            continue
+        if result["route_status"] == "CollisionWarning":
+            report["collision_warnings"] += 1
+        report["routed"] += 1
+        report["routes"].append(
+            {
+                "wire_uuid": _wire_item_value(item, "wire_id", "wire_uuid", "id"),
+                "algorithm": result["algorithm"],
+                "route_status": result["route_status"],
+                "collision_count": result["collision_count"],
+            }
+        )
+    return report
+
+
+def _iter_wire_tasks(doc):
+    try:
+        task_group = doc.getObject("QETWiring_01_Tasks")
+    except Exception:
+        task_group = None
+    if task_group is None:
+        return []
+    return [
+        task
+        for task in list(getattr(task_group, "Group", []) or [])
+        if (getattr(task, "RouteType", "") or "").strip() == "Task"
+    ]
+
+
+def route_all_tasks(doc, options=None):
+    payload = {"wires": []}
+    for task in _iter_wire_tasks(doc):
+        payload["wires"].append(
+            {
+                "wire_id": (getattr(task, "QetWireUuid", "") or "").strip(),
+                "wire_label": (getattr(task, "QetWireLabel", "") or "").strip(),
+                "wire_mark": (getattr(task, "QetWireMark", "") or "").strip(),
+                "wire_mark_is_manual": bool(getattr(task, "QetWireMarkIsManual", False)),
+                "net_uuid": (getattr(task, "QetNetUuid", "") or "").strip(),
+                "group_uuid": (getattr(task, "QetGroupUuid", "") or "").strip(),
+                "start_terminal_uuid": (getattr(task, "QetStartTerminalUuid", "") or "").strip(),
+                "end_terminal_uuid": (getattr(task, "QetEndTerminalUuid", "") or "").strip(),
+            }
+        )
+    return route_all_from_payload(doc, payload, options=options)
+
+
+def wire_task_count(doc):
+    return len(_iter_wire_tasks(doc))
+
+
+def clear_auto_routes(doc):
+    removed = 0
+    for obj in list(WiringObjects.iter_routed_wire_objects(doc)):
+        if (getattr(obj, "RouteType", "") or "").strip() != "AutoSuggested":
+            continue
+        try:
+            doc.removeObject(obj.Name)
+            removed += 1
+        except Exception:
+            pass
+    try:
+        doc.recompute()
+    except Exception:
+        pass
+    return removed
+
+
+def _selected_terminals():
+    if Gui is None:
+        return []
+    try:
+        return [obj for obj in Gui.Selection.getSelection() if TerminalObjects.is_terminal_object(obj)]
+    except Exception:
+        return []
+
+
+def _console_message(message):
+    try:
+        App.Console.PrintMessage("[FreeCADExchange] {0}\n".format(message))
+    except Exception:
+        pass
+
+
+def _console_error(message):
+    try:
+        App.Console.PrintError("[FreeCADExchange] {0}\n".format(message))
+    except Exception:
+        pass
+
+
+class CommandAutoRouteSelected:
+    def GetResources(self):
+        return {
+            "MenuText": "测试布线选中两个端子",
+            "ToolTip": "单条连接测试：只在两个选中的 QET 3D 工程端子之间生成自动折线导线",
+        }
+
+    def IsActive(self):
+        return getattr(App, "ActiveDocument", None) is not None and Gui is not None
+
+    def Activated(self):
+        doc = getattr(App, "ActiveDocument", None)
+        terminals = _selected_terminals()
+        if len(terminals) != 2:
+            _console_error("请先选中两个可布线工程端子。")
+            return
+        try:
+            result = route_between_terminals(doc, terminals[0], terminals[1])
+            _console_message(
+                "自动布线完成：algorithm={0}, status={1}, collisions={2}".format(
+                    result["algorithm"],
+                    result["route_status"],
+                    result["collision_count"],
+                )
+            )
+            try:
+                Gui.SendMsgToActiveView("ViewFit")
+            except Exception:
+                pass
+        except Exception as exc:
+            _console_error("自动布线失败：{0}".format(exc))
+
+
+class CommandAutoRouteAll:
+    def GetResources(self):
+        return {
+            "MenuText": "按导线任务自动布线全部",
+            "ToolTip": "根据 QET 导线任务批量生成 3D 自动布线路径",
+        }
+
+    def IsActive(self):
+        return getattr(App, "ActiveDocument", None) is not None
+
+    def Activated(self):
+        doc = getattr(App, "ActiveDocument", None)
+        try:
+            payload = getattr(App, "_qet_exchange_payload", None)
+            if isinstance(payload, dict) and payload.get("wires"):
+                report = route_all_from_payload(doc, payload)
+            else:
+                report = route_all_tasks(doc)
+            if report.get("total_wires", 0) <= 0:
+                _console_error("没有导线任务。自动布线全部导线需要 QET wires[] 或 QETWiring_01_Tasks。")
+                return
+            _console_message(
+                "批量自动布线完成：routed={0}, collision_warnings={1}, missing_terminals={2}".format(
+                    report.get("routed", 0),
+                    report.get("collision_warnings", 0),
+                    report.get("skipped_missing_terminal", 0),
+                )
+            )
+        except Exception as exc:
+            _console_error("批量自动布线失败：{0}".format(exc))
+
+
+_COMMANDS_REGISTERED = False
+
+
+def register_commands():
+    global _COMMANDS_REGISTERED
+    if _COMMANDS_REGISTERED:
+        return
+    if Gui is None or not hasattr(Gui, "addCommand"):
+        return
+    Gui.addCommand("QET_Exchange_AutoRouteSelected", CommandAutoRouteSelected())
+    Gui.addCommand("QET_Exchange_AutoRouteAll", CommandAutoRouteAll())
+    _COMMANDS_REGISTERED = True
+
+
+register_commands()
diff --git a/src/Mod/FreeCADExchange/AutoRoutingPanel.py b/src/Mod/FreeCADExchange/AutoRoutingPanel.py
new file mode 100644
index 0000000..b411849
--- /dev/null
+++ b/src/Mod/FreeCADExchange/AutoRoutingPanel.py
@@ -0,0 +1,366 @@
+# FreeCADExchange GUI panel for 3D automatic wiring.
+#
+# 面板只调用 Python 算法：扫描端子/走线网络、从选择创建 carrier、
+# 对选中端子或全部导线任务执行自动布线。
+
+import FreeCAD as App
+
+try:
+    import FreeCADGui as Gui
+except ImportError:
+    Gui = None
+
+try:
+    from PySide6 import QtWidgets
+except ImportError:
+    try:
+        from PySide2 import QtWidgets
+    except ImportError:
+        try:
+            from PySide import QtGui as QtWidgets
+        except ImportError:
+            QtWidgets = None
+
+import AutoRouting
+import RoutingNetwork
+import TerminalObjects
+
+try:
+    import ExchangeWriteBack
+except Exception:
+    ExchangeWriteBack = None
+
+
+COMMAND_NAME = "QET_Exchange_OpenAutoRoutingPanel"
+
+
+class AutoRoutingPanelError(RuntimeError):
+    pass
+
+
+def _active_document():
+    doc = getattr(App, "ActiveDocument", None)
+    if doc is None:
+        raise AutoRoutingPanelError("请先打开 QET 3D 工程文档。")
+    return doc
+
+
+def _console_message(message):
+    try:
+        App.Console.PrintMessage("[FreeCADExchange] {0}\n".format(message))
+    except Exception:
+        pass
+
+
+def _console_error(message):
+    try:
+        App.Console.PrintError("[FreeCADExchange] {0}\n".format(message))
+    except Exception:
+        pass
+
+
+def _selection():
+    if Gui is None:
+        return []
+    try:
+        return list(Gui.Selection.getSelection() or [])
+    except Exception:
+        return []
+
+
+def _selection_ex():
+    if Gui is None:
+        return []
+    try:
+        return list(Gui.Selection.getSelectionEx() or [])
+    except Exception:
+        return []
+
+
+def _selected_terminals():
+    return [obj for obj in _selection() if TerminalObjects.is_terminal_object(obj)]
+
+
+class AutoRoutingController:
+    def __init__(self):
+        self.last_report = None
+
+    def summary(self):
+        doc = _active_document()
+        terminal_count = len(AutoRouting.index_terminals(doc))
+        task_count = AutoRouting.wire_task_count(doc)
+        payload = getattr(App, "_qet_exchange_payload", None)
+        payload_wire_count = 0
+        if isinstance(payload, dict) and isinstance(payload.get("wires"), list):
+            payload_wire_count = len(payload.get("wires") or [])
+        network = RoutingNetwork.network_summary(doc)
+        kinds = network.get("kinds", {}) if isinstance(network.get("kinds", {}), dict) else {}
+        kind_text = ""
+        if kinds:
+            kind_text = "；类型：" + "，".join(
+                "{0}={1}".format(key, value)
+                for key, value in sorted(kinds.items())
+            )
+        return "端子：{0}；导线任务：{1}；QET导线：{2}；路由网络：{3} 条 carrier / {4} 段 / {5} 节点{6}".format(
+            terminal_count,
+            task_count,
+            payload_wire_count,
+            network.get("carriers", 0),
+            network.get("segments", 0),
+            network.get("nodes", 0),
+            kind_text,
+        )
+
+    def create_carriers_from_selection(self):
+        doc = _active_document()
+        project_uuid = getattr(TerminalObjects.ensure_root_group(doc), "QetProjectUuid", "").strip()
+        created = RoutingNetwork.create_carriers_from_selection(
+            doc,
+            _selection_ex(),
+            project_uuid=project_uuid,
+        )
+        self.last_report = {"created_carriers": len(created)}
+        return created
+
+    def create_wire_duct_carriers_from_selection(self):
+        doc = _active_document()
+        project_uuid = getattr(TerminalObjects.ensure_root_group(doc), "QetProjectUuid", "").strip()
+        created = RoutingNetwork.create_wire_duct_carriers_from_selection(
+            doc,
+            _selection_ex(),
+            project_uuid=project_uuid,
+        )
+        self.last_report = {"created_wire_duct_carriers": len(created)}
+        return created
+
+    def create_surface_carriers_from_selection(self):
+        doc = _active_document()
+        project_uuid = getattr(TerminalObjects.ensure_root_group(doc), "QetProjectUuid", "").strip()
+        created = RoutingNetwork.create_surface_carriers_from_selection(
+            doc,
+            _selection_ex(),
+            project_uuid=project_uuid,
+        )
+        self.last_report = {"created_surface_carriers": len(created)}
+        return created
+
+    def route_selected(self):
+        doc = _active_document()
+        terminals = _selected_terminals()
+        if len(terminals) != 2:
+            raise AutoRoutingPanelError(
+                "这个按钮只用于单条连接测试，请正好选中两个可布线工程端子。批量布线请使用“按导线任务自动布线全部”。"
+            )
+        result = AutoRouting.route_between_terminals(doc, terminals[0], terminals[1])
+        self.last_report = result
+        return result
+
+    def route_all(self):
+        doc = _active_document()
+        payload = getattr(App, "_qet_exchange_payload", None)
+        if isinstance(payload, dict) and payload.get("wires"):
+            report = AutoRouting.route_all_from_payload(doc, payload)
+        else:
+            report = AutoRouting.route_all_tasks(doc)
+        if report.get("total_wires", 0) <= 0:
+            raise AutoRoutingPanelError(
+                "没有导线任务，不能判断哪些端子应该互相连接。请先从 QET 导入 wires[]，或确认 QETWiring_01_Tasks 中存在导线任务。"
+            )
+        self.last_report = report
+        return report
+
+    def clear_auto_routes(self):
+        doc = _active_document()
+        removed = AutoRouting.clear_auto_routes(doc)
+        self.last_report = {"removed": removed}
+        return removed
+
+    def clear_route_carriers(self):
+        doc = _active_document()
+        removed = RoutingNetwork.clear_route_carriers(doc)
+        self.last_report = {"removed_carriers": removed}
+        return removed
+
+    def save(self):
+        doc = _active_document()
+        file_name = getattr(doc, "FileName", "")
+        if file_name and hasattr(doc, "save"):
+            doc.save()
+        if ExchangeWriteBack is not None:
+            return ExchangeWriteBack.write_back_document(doc)
+        return {"saved": bool(file_name)}
+
+
+class AutoRoutingTaskPanel:
+    def __init__(self, controller=None):
+        if QtWidgets is None:
+            raise AutoRoutingPanelError("Qt widgets are not available.")
+        self.controller = controller or AutoRoutingController()
+        self.form = QtWidgets.QWidget()
+        self.form.setWindowTitle("3D 自动布线")
+
+        layout = QtWidgets.QVBoxLayout(self.form)
+        self.scan_button = QtWidgets.QPushButton("扫描端子/网络")
+        self.create_wire_duct_button = QtWidgets.QPushButton("从线槽实体生成中心路径")
+        self.create_carrier_button = QtWidgets.QPushButton("从线槽/草图创建路由路径")
+        self.create_surface_button = QtWidgets.QPushButton("从选中面创建辅助路由区域")
+        self.route_selected_button = QtWidgets.QPushButton("测试布线选中两个端子")
+        self.route_all_button = QtWidgets.QPushButton("按导线任务自动布线全部")
+        self.clear_button = QtWidgets.QPushButton("清除自动布线")
+        self.clear_carriers_button = QtWidgets.QPushButton("清除走线路径")
+        self.save_button = QtWidgets.QPushButton("保存")
+        self.status_label = QtWidgets.QLabel("")
+        self.status_label.setWordWrap(True)
+
+        for widget in (
+            self.scan_button,
+            self.create_wire_duct_button,
+            self.create_carrier_button,
+            self.create_surface_button,
+            self.route_selected_button,
+            self.route_all_button,
+            self.clear_button,
+            self.clear_carriers_button,
+            self.save_button,
+            self.status_label,
+        ):
+            layout.addWidget(widget)
+
+        self.scan_button.clicked.connect(self.scan)
+        self.create_wire_duct_button.clicked.connect(self.create_wire_duct_carriers)
+        self.create_carrier_button.clicked.connect(self.create_carriers)
+        self.create_surface_button.clicked.connect(self.create_surface_carriers)
+        self.route_selected_button.clicked.connect(self.route_selected)
+        self.route_all_button.clicked.connect(self.route_all)
+        self.clear_button.clicked.connect(self.clear_auto_routes)
+        self.clear_carriers_button.clicked.connect(self.clear_route_carriers)
+        self.save_button.clicked.connect(self.save)
+        self.scan()
+
+    def _set_status(self, message):
+        self.status_label.setText(message)
+        _console_message(message)
+
+    def _set_error(self, message):
+        self.status_label.setText(message)
+        _console_error(message)
+
+    def scan(self):
+        try:
+            self._set_status(self.controller.summary())
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def create_carriers(self):
+        try:
+            created = self.controller.create_carriers_from_selection()
+            self._set_status("已创建路由路径：{0} 条。{1}".format(len(created), self.controller.summary()))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def create_wire_duct_carriers(self):
+        try:
+            created = self.controller.create_wire_duct_carriers_from_selection()
+            self._set_status("已创建线槽中心路径：{0} 条。{1}".format(len(created), self.controller.summary()))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def create_surface_carriers(self):
+        try:
+            created = self.controller.create_surface_carriers_from_selection()
+            self._set_status("已创建辅助路由区域：{0} 条。{1}".format(len(created), self.controller.summary()))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def route_selected(self):
+        try:
+            result = self.controller.route_selected()
+            self._set_status(
+                "自动布线完成：algorithm={0}, status={1}, collisions={2}".format(
+                    result.get("algorithm", ""),
+                    result.get("route_status", ""),
+                    result.get("collision_count", 0),
+                )
+            )
+            try:
+                if Gui is not None:
+                    Gui.SendMsgToActiveView("ViewFit")
+            except Exception:
+                pass
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def route_all(self):
+        try:
+            report = self.controller.route_all()
+            self._set_status(
+                "批量自动布线完成：routed={0}, collision_warnings={1}, missing_terminals={2}".format(
+                    report.get("routed", 0),
+                    report.get("collision_warnings", 0),
+                    report.get("skipped_missing_terminal", 0),
+                )
+            )
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def clear_auto_routes(self):
+        try:
+            removed = self.controller.clear_auto_routes()
+            self._set_status("已清除自动布线：{0} 条。".format(removed))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def clear_route_carriers(self):
+        try:
+            removed = self.controller.clear_route_carriers()
+            self._set_status("已清除走线路径：{0} 条。{1}".format(removed, self.controller.summary()))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def save(self):
+        try:
+            report = self.controller.save()
+            output_path = report.get("output_path", "") if isinstance(report, dict) else ""
+            self._set_status("已保存。{0}".format(output_path))
+        except Exception as exc:
+            self._set_error(str(exc))
+
+    def accept(self):
+        return True
+
+    def reject(self):
+        return True
+
+
+class CommandOpenAutoRoutingPanel:
+    def GetResources(self):
+        return {
+            "MenuText": "3D自动布线",
+            "ToolTip": "打开 3D 自动布线面板",
+        }
+
+    def IsActive(self):
+        return getattr(App, "ActiveDocument", None) is not None and Gui is not None
+
+    def Activated(self):
+        if Gui is None or not hasattr(Gui, "Control"):
+            return
+        if hasattr(Gui.Control, "activeDialog") and Gui.Control.activeDialog():
+            Gui.Control.closeDialog()
+        Gui.Control.showDialog(AutoRoutingTaskPanel())
+
+
+_COMMANDS_REGISTERED = False
+
+
+def register_commands():
+    global _COMMANDS_REGISTERED
+    if _COMMANDS_REGISTERED:
+        return
+    if Gui is None or not hasattr(Gui, "addCommand"):
+        return
+    Gui.addCommand(COMMAND_NAME, CommandOpenAutoRoutingPanel())
+    _COMMANDS_REGISTERED = True
+
+
+register_commands()
diff --git a/src/Mod/FreeCADExchange/CMakeLists.txt b/src/Mod/FreeCADExchange/CMakeLists.txt
index 34436ae..05e6f87 100644
--- a/src/Mod/FreeCADExchange/CMakeLists.txt
+++ b/src/Mod/FreeCADExchange/CMakeLists.txt
@@ -13,6 +13,9 @@ set(FreeCADExchange_Scripts
     TerminalImport.py
     WiringObjects.py
     WiringImport.py
+    RoutingNetwork.py
+    AutoRouting.py
+    AutoRoutingPanel.py
     ExchangeWriteBack.py
     ManualWiring.py
     ManualWiringPanel.py
diff --git a/src/Mod/FreeCADExchange/InitGui.py b/src/Mod/FreeCADExchange/InitGui.py
index 76975bc..e233a56 100644
--- a/src/Mod/FreeCADExchange/InitGui.py
+++ b/src/Mod/FreeCADExchange/InitGui.py
@@ -16,6 +16,9 @@ COMMANDS = [
     "QET_Template_CreateEngineeringTerminals",
     "QET_Exchange_CreateManualWire",
     "QET_Exchange_OpenManualWiringPanel",
+    "QET_Exchange_AutoRouteSelected",
+    "QET_Exchange_AutoRouteAll",
+    "QET_Exchange_OpenAutoRoutingPanel",
 ]
 
 
@@ -63,6 +66,8 @@ def _register_exchange_commands(
     traceback_module=traceback,
 ):
     exchange_write_back = safe_import("ExchangeWriteBack")
+    auto_routing = safe_import("AutoRouting")
+    auto_routing_panel = safe_import("AutoRoutingPanel")
     manual_wiring = safe_import("ManualWiring")
     manual_wiring_panel = safe_import("ManualWiringPanel")
     template_authoring = safe_import("TemplateAuthoring")
@@ -89,6 +94,26 @@ def _register_exchange_commands(
             )
         )
 
+    try:
+        if auto_routing is not None:
+            auto_routing.register_commands()
+    except Exception:
+        append_init_log(
+            "InitGui failed to register auto-routing commands:\n{0}".format(
+                traceback_module.format_exc()
+            )
+        )
+
+    try:
+        if auto_routing_panel is not None:
+            auto_routing_panel.register_commands()
+    except Exception:
+        append_init_log(
+            "InitGui failed to register auto-routing panel command:\n{0}".format(
+                traceback_module.format_exc()
+            )
+        )
+
     try:
         if manual_wiring is not None:
             manual_wiring.register_commands()
diff --git a/src/Mod/FreeCADExchange/RoutingNetwork.py b/src/Mod/FreeCADExchange/RoutingNetwork.py
new file mode 100644
index 0000000..32c29e5
--- /dev/null
+++ b/src/Mod/FreeCADExchange/RoutingNetwork.py
@@ -0,0 +1,875 @@
+# FreeCADExchange route carrier network helpers.
+#
+# 这个模块只管理 FreeCAD 文档里的走线网络，不写数据库。
+# 第一版的思路是：用户或模板把线槽/导轨中心线标成 carrier，
+# 自动布线算法再沿这些 carrier 做最短路搜索。
+
+import heapq
+
+import FreeCAD as App
+
+import TerminalObjects
+import WiringObjects
+
+
+ROUTING_ROLE = "RoutingCarrier"
+ROUTE_CARRIER_KIND = "RoutingPath"
+ROUTE_CARRIER_KIND_WIRE_DUCT = "WireDuct"
+ROUTE_CARRIER_KIND_AUXILIARY_PATH = "AuxiliaryPath"
+ROUTE_CARRIER_KIND_ROUTING_RANGE = "RoutingRange"
+PROPERTY_GROUP = "QET Routing"
+DEFAULT_NODE_TOLERANCE = 0.001
+DEFAULT_SURFACE_LANE_SPACING = 100.0
+DEFAULT_SURFACE_OFFSET = 5.0
+DEFAULT_SURFACE_MARGIN = 20.0
+DEFAULT_WIRE_DUCT_MARGIN = 20.0
+WIRE_DUCT_OBSTACLE_MODE = "PassThrough"
+DEFAULT_KIND_COST_FACTORS = {
+    ROUTE_CARRIER_KIND_WIRE_DUCT: 1.0,
+    ROUTE_CARRIER_KIND: 1.0,
+    ROUTE_CARRIER_KIND_AUXILIARY_PATH: 2.0,
+    ROUTE_CARRIER_KIND_ROUTING_RANGE: 8.0,
+    # 旧文档兼容：之前的贴面网格使用 SurfaceGrid。
+    "SurfaceGrid": 8.0,
+    "UserPath": 1.0,
+}
+
+
+class RoutingNetworkError(RuntimeError):
+    pass
+
+
+class _SimpleBoundBox:
+    def __init__(self, xmin, xmax, ymin, ymax, zmin, zmax):
+        self.XMin = float(xmin)
+        self.XMax = float(xmax)
+        self.YMin = float(ymin)
+        self.YMax = float(ymax)
+        self.ZMin = float(zmin)
+        self.ZMax = float(zmax)
+
+
+def _vector(point):
+    if isinstance(point, App.Vector):
+        return App.Vector(point.x, point.y, point.z)
+    if isinstance(point, (list, tuple)) and len(point) >= 3:
+        return App.Vector(float(point[0]), float(point[1]), float(point[2]))
+    if isinstance(point, dict):
+        return App.Vector(
+            float(point.get("x", 0.0)),
+            float(point.get("y", 0.0)),
+            float(point.get("z", 0.0)),
+        )
+    if all(hasattr(point, name) for name in ("x", "y", "z")):
+        return App.Vector(float(point.x), float(point.y), float(point.z))
+    raise RoutingNetworkError("Route carrier point must be a 3D point.")
+
+
+def _distance(left, right):
+    dx = float(left.x) - float(right.x)
+    dy = float(left.y) - float(right.y)
+    dz = float(left.z) - float(right.z)
+    return (dx * dx + dy * dy + dz * dz) ** 0.5
+
+
+def _direction_key(left, right, tolerance=DEFAULT_NODE_TOLERANCE):
+    dx = float(right.x) - float(left.x)
+    dy = float(right.y) - float(left.y)
+    dz = float(right.z) - float(left.z)
+    length = (dx * dx + dy * dy + dz * dz) ** 0.5
+    if length <= tolerance:
+        return (0, 0, 0)
+    return (
+        int(round(dx / length * 1000.0)),
+        int(round(dy / length * 1000.0)),
+        int(round(dz / length * 1000.0)),
+    )
+
+
+def _dominant_axis(vector):
+    components = {
+        "x": abs(float(getattr(vector, "x", 0.0))),
+        "y": abs(float(getattr(vector, "y", 0.0))),
+        "z": abs(float(getattr(vector, "z", 0.0))),
+    }
+    axis = max(components, key=components.get)
+    if components[axis] <= 0.000001:
+        return None
+    return axis
+
+
+def _axis_value(point, axis):
+    return float(getattr(point, axis, 0.0))
+
+
+def _set_axis(point, axis, value):
+    return App.Vector(
+        float(value) if axis == "x" else float(point.x),
+        float(value) if axis == "y" else float(point.y),
+        float(value) if axis == "z" else float(point.z),
+    )
+
+
+def _bound_box_from_object(obj):
+    if obj is None:
+        return None
+
+    shape = getattr(obj, "Shape", None)
+    bbox = getattr(shape, "BoundBox", None)
+    if bbox is not None:
+        return bbox
+
+    bbox = getattr(obj, "BoundBox", None)
+    if bbox is not None:
+        return bbox
+
+    merged = None
+    for child in list(getattr(obj, "Group", []) or []):
+        child_bbox = _bound_box_from_object(child)
+        if child_bbox is None:
+            continue
+        if merged is None:
+            merged = _SimpleBoundBox(
+                child_bbox.XMin,
+                child_bbox.XMax,
+                child_bbox.YMin,
+                child_bbox.YMax,
+                child_bbox.ZMin,
+                child_bbox.ZMax,
+            )
+            continue
+        merged = _SimpleBoundBox(
+            min(merged.XMin, child_bbox.XMin),
+            max(merged.XMax, child_bbox.XMax),
+            min(merged.YMin, child_bbox.YMin),
+            max(merged.YMax, child_bbox.YMax),
+            min(merged.ZMin, child_bbox.ZMin),
+            max(merged.ZMax, child_bbox.ZMax),
+        )
+    return merged
+
+
+def _bbox_center(bbox):
+    return App.Vector(
+        (float(bbox.XMin) + float(bbox.XMax)) * 0.5,
+        (float(bbox.YMin) + float(bbox.YMax)) * 0.5,
+        (float(bbox.ZMin) + float(bbox.ZMax)) * 0.5,
+    )
+
+
+def _bbox_extent(bbox, axis):
+    low, high = _bbox_axis_range(bbox, axis)
+    return abs(high - low)
+
+
+def _point_key(point, tolerance=DEFAULT_NODE_TOLERANCE):
+    scale = 1.0 / float(tolerance or DEFAULT_NODE_TOLERANCE)
+    return (
+        int(round(float(point.x) * scale)),
+        int(round(float(point.y) * scale)),
+        int(round(float(point.z) * scale)),
+    )
+
+
+def _point_payload(point):
+    return {
+        "x": float(point.x),
+        "y": float(point.y),
+        "z": float(point.z),
+    }
+
+
+def _unique_name(doc, base_name):
+    name = TerminalObjects.safe_token(base_name)
+    if doc.getObject(name) is None:
+        return name
+    suffix = 1
+    while doc.getObject("{0}_{1}".format(name, suffix)) is not None:
+        suffix += 1
+    return "{0}_{1}".format(name, suffix)
+
+
+def _ensure_vector_list_property(obj, prop_name, description):
+    if prop_name not in getattr(obj, "PropertiesList", []):
+        obj.addProperty(
+            "App::PropertyVectorList",
+            prop_name,
+            PROPERTY_GROUP,
+            description,
+        )
+
+
+def _set_route_carrier_semantics(obj, project_uuid="", kind=ROUTE_CARRIER_KIND):
+    TerminalObjects.ensure_string_property(
+        obj,
+        "QetRoutingRole",
+        PROPERTY_GROUP,
+        "Routing role marker",
+        ROUTING_ROLE,
+    )
+    TerminalObjects.ensure_string_property(
+        obj,
+        "QetRouteCarrierKind",
+        PROPERTY_GROUP,
+        "Route carrier kind",
+        kind,
+    )
+    TerminalObjects.ensure_string_property(
+        obj,
+        "QetProjectUuid",
+        PROPERTY_GROUP,
+        "Project UUID for this route carrier",
+        project_uuid,
+    )
+    TerminalObjects.ensure_bool_property(
+        obj,
+        "CanRouteWire",
+        PROPERTY_GROUP,
+        "Whether auto-routing can use this path",
+        True,
+    )
+    return obj
+
+
+def _create_carrier_geometry(doc, name, points):
+    # Draft 生成的线在 GUI 里更容易看见；命令行/测试环境没有 Draft 时退回 Part。
+    if getattr(App, "ActiveDocument", None) is doc:
+        try:
+            import Draft
+
+            obj = Draft.make_wire(
+                points,
+                closed=False,
+                placement=None,
+                face=None,
+                support=None,
+                bs2wire=False,
+            )
+            if obj is not None:
+                return obj
+        except Exception:
+            pass
+
+    try:
+        import Part
+
+        obj = doc.addObject("Part::Feature", name)
+        obj.Shape = Part.makePolygon(points)
+        return obj
+    except Exception:
+        obj = doc.addObject("App::FeaturePython", name)
+        return obj
+
+
+def create_route_carrier(doc, points, label="", project_uuid="", kind=ROUTE_CARRIER_KIND):
+    """Create a routable carrier from ordered 3D points."""
+    if doc is None:
+        raise RoutingNetworkError("No FreeCAD document is available.")
+
+    normalized = []
+    for point in points or []:
+        vector = _vector(point)
+        if not normalized or _distance(normalized[-1], vector) > DEFAULT_NODE_TOLERANCE:
+            normalized.append(vector)
+
+    if len(normalized) < 2:
+        raise RoutingNetworkError("A route carrier requires at least two distinct points.")
+
+    name = _unique_name(doc, "QETRouteCarrier")
+    carrier = _create_carrier_geometry(doc, name, normalized)
+    carrier.Label = label or "QET Route Carrier"
+    _ensure_vector_list_property(
+        carrier,
+        "Points",
+        "Ordered centerline points used by the 3D router",
+    )
+    carrier.Points = list(normalized)
+    _set_route_carrier_semantics(carrier, project_uuid=project_uuid, kind=kind)
+
+    group = WiringObjects.ensure_carrier_group(doc, project_uuid)
+    if carrier not in getattr(group, "Group", []):
+        group.addObject(carrier)
+
+    try:
+        carrier.ViewObject.Visibility = True
+        carrier.ViewObject.LineWidth = 3.0
+        carrier.ViewObject.LineColor = (1.0, 0.55, 0.0)
+    except Exception:
+        pass
+
+    try:
+        doc.recompute()
+    except Exception:
+        pass
+    return carrier
+
+
+def is_route_carrier(obj):
+    if obj is None:
+        return False
+    role = (getattr(obj, "QetRoutingRole", "") or "").strip()
+    return role == ROUTING_ROLE and bool(getattr(obj, "CanRouteWire", False))
+
+
+def _carrier_points(obj):
+    points = list(getattr(obj, "Points", []) or [])
+    if points:
+        return [_vector(point) for point in points]
+
+    shape = getattr(obj, "Shape", None)
+    ordered = getattr(shape, "OrderedVertexes", None)
+    if ordered:
+        return [_vector(vertex.Point) for vertex in ordered if getattr(vertex, "Point", None) is not None]
+
+    vertexes = getattr(shape, "Vertexes", None)
+    if vertexes:
+        return [_vector(vertex.Point) for vertex in vertexes if getattr(vertex, "Point", None) is not None]
+
+    return []
+
+
+def collect_route_carriers(doc):
+    if doc is None:
+        return []
+
+    group = None
+    try:
+        group = doc.getObject("QETWiring_02_Carriers")
+    except Exception:
+        group = None
+
+    candidates = []
+    if group is not None:
+        candidates.extend(list(getattr(group, "Group", []) or []))
+    candidates.extend(list(getattr(doc, "Objects", []) or []))
+
+    result = []
+    seen = set()
+    for obj in candidates:
+        if obj is None or id(obj) in seen:
+            continue
+        seen.add(id(obj))
+        if is_route_carrier(obj):
+            result.append(obj)
+    return result
+
+
+def _detach_from_groups(doc, obj):
+    for parent in list(getattr(obj, "InList", []) or []):
+        group = list(getattr(parent, "Group", []) or [])
+        if obj not in group:
+            continue
+        try:
+            if hasattr(parent, "removeObject"):
+                parent.removeObject(obj)
+            else:
+                parent.Group = [child for child in group if child is not obj]
+        except Exception:
+            try:
+                parent.Group = [child for child in group if child is not obj]
+            except Exception:
+                pass
+
+    for parent in list(getattr(doc, "Objects", []) or []):
+        group = list(getattr(parent, "Group", []) or [])
+        if obj not in group:
+            continue
+        try:
+            if hasattr(parent, "removeObject"):
+                parent.removeObject(obj)
+            else:
+                parent.Group = [child for child in group if child is not obj]
+        except Exception:
+            try:
+                parent.Group = [child for child in group if child is not obj]
+            except Exception:
+                pass
+
+
+def clear_route_carriers(doc):
+    """Delete generated route carriers while keeping terminals and routed wires."""
+    removed = 0
+    for carrier in list(collect_route_carriers(doc)):
+        _detach_from_groups(doc, carrier)
+        try:
+            if doc.getObject(getattr(carrier, "Name", "")) is not None:
+                doc.removeObject(carrier.Name)
+                removed += 1
+        except Exception:
+            pass
+    try:
+        doc.recompute()
+    except Exception:
+        pass
+    return removed
+
+
+def _shape_center(shape):
+    bbox = getattr(shape, "BoundBox", None)
+    if bbox is None:
+        return None
+    return App.Vector(
+        (float(bbox.XMin) + float(bbox.XMax)) * 0.5,
+        (float(bbox.YMin) + float(bbox.YMax)) * 0.5,
+        (float(bbox.ZMin) + float(bbox.ZMax)) * 0.5,
+    )
+
+
+def _edge_points(edge):
+    first = None
+    last = None
+    vertexes = list(getattr(edge, "Vertexes", []) or [])
+    if len(vertexes) >= 2:
+        first = getattr(vertexes[0], "Point", None)
+        last = getattr(vertexes[-1], "Point", None)
+    if first is not None and last is not None:
+        return [_vector(first), _vector(last)]
+
+    try:
+        first = edge.valueAt(edge.FirstParameter)
+        last = edge.valueAt(edge.LastParameter)
+        return [_vector(first), _vector(last)]
+    except Exception:
+        return []
+
+
+def _is_route_path_source_object(obj):
+    if obj is None:
+        return False
+    type_id = (getattr(obj, "TypeId", "") or "").lower()
+    if "sketch" in type_id:
+        return True
+    if list(getattr(obj, "Points", []) or []):
+        return True
+    shape = getattr(obj, "Shape", None)
+    if shape is None:
+        return False
+    # SOLIDWORKS/EPLAN 的 routing path 是草图/线槽路径，不是把实体零件的全部边都当路径。
+    # 所以只有纯线状对象才允许整对象转换；带 Face/Solid 的实体必须显式选中边。
+    faces = list(getattr(shape, "Faces", []) or [])
+    solids = list(getattr(shape, "Solids", []) or [])
+    shells = list(getattr(shape, "Shells", []) or [])
+    if faces or solids or shells:
+        return False
+    return bool(list(getattr(shape, "Edges", []) or []))
+
+
+def _points_from_selection_item(selection_item):
+    points = []
+
+    for point in list(getattr(selection_item, "PickedPoints", []) or []):
+        points.append(_vector(point))
+
+    for sub_object in list(getattr(selection_item, "SubObjects", []) or []):
+        shape_type = (getattr(sub_object, "ShapeType", "") or "").lower()
+        if shape_type == "edge":
+            points.extend(_edge_points(sub_object))
+            continue
+        if shape_type == "vertex":
+            point = getattr(sub_object, "Point", None)
+            if point is not None:
+                points.append(_vector(point))
+            continue
+        center = _shape_center(sub_object)
+        if center is not None:
+            points.append(center)
+
+    obj = getattr(selection_item, "Object", None)
+    shape = getattr(obj, "Shape", None)
+    if shape is not None and _is_route_path_source_object(obj):
+        for edge in list(getattr(shape, "Edges", []) or []):
+            points.extend(_edge_points(edge))
+        if not points:
+            center = _shape_center(shape)
+            if center is not None:
+                points.append(center)
+
+    normalized = []
+    for point in points:
+        if not normalized or _distance(normalized[-1], point) > DEFAULT_NODE_TOLERANCE:
+            normalized.append(point)
+    return normalized
+
+
+def _face_normal(face):
+    try:
+        return _vector(face.normalAt(0.5, 0.5))
+    except Exception:
+        pass
+    try:
+        return _vector(face.normalAt(0.0, 0.0))
+    except Exception:
+        pass
+    return None
+
+
+def _bbox_axis_range(bbox, axis):
+    if axis == "x":
+        return float(bbox.XMin), float(bbox.XMax)
+    if axis == "y":
+        return float(bbox.YMin), float(bbox.YMax)
+    return float(bbox.ZMin), float(bbox.ZMax)
+
+
+def _surface_grid_values(min_value, max_value, spacing, margin):
+    low = float(min_value) + float(margin)
+    high = float(max_value) - float(margin)
+    if high < low:
+        low = float(min_value)
+        high = float(max_value)
+    if abs(high - low) <= DEFAULT_NODE_TOLERANCE:
+        return [low]
+
+    spacing = max(float(spacing or DEFAULT_SURFACE_LANE_SPACING), 1.0)
+    values = [low]
+    current = low + spacing
+    while current < high - DEFAULT_NODE_TOLERANCE:
+        values.append(current)
+        current += spacing
+    if abs(values[-1] - high) > DEFAULT_NODE_TOLERANCE:
+        values.append(high)
+    return values
+
+
+def _surface_face_grid_points(face, spacing, offset, margin):
+    normal = _face_normal(face)
+    bbox = getattr(face, "BoundBox", None)
+    if normal is None or bbox is None:
+        return []
+
+    normal_axis = _dominant_axis(normal)
+    if normal_axis is None:
+        return []
+
+    tangent_axes = [axis for axis in ("x", "y", "z") if axis != normal_axis]
+    first_axis, second_axis = tangent_axes[0], tangent_axes[1]
+    first_min, first_max = _bbox_axis_range(bbox, first_axis)
+    second_min, second_max = _bbox_axis_range(bbox, second_axis)
+    normal_min, normal_max = _bbox_axis_range(bbox, normal_axis)
+    normal_sign = 1.0 if _axis_value(normal, normal_axis) >= 0.0 else -1.0
+    plane_value = ((normal_min + normal_max) * 0.5) + normal_sign * float(offset or 0.0)
+
+    first_values = _surface_grid_values(first_min, first_max, spacing, margin)
+    second_values = _surface_grid_values(second_min, second_max, spacing, margin)
+    if len(first_values) < 2 or len(second_values) < 2:
+        return []
+
+    rows = []
+    for second_value in second_values:
+        row = []
+        for first_value in first_values:
+            point = App.Vector(0, 0, 0)
+            point = _set_axis(point, normal_axis, plane_value)
+            point = _set_axis(point, first_axis, first_value)
+            point = _set_axis(point, second_axis, second_value)
+            row.append(point)
+        rows.append(row)
+
+    columns = []
+    for first_index in range(len(first_values)):
+        column = []
+        for row in rows:
+            column.append(row[first_index])
+        columns.append(column)
+
+    # 行和列都要生成 carrier，Dijkstra 才能在网格交点处横竖换向。
+    return rows + columns
+
+
+def create_carriers_from_selection(doc, selection_ex, project_uuid="", kind=ROUTE_CARRIER_KIND):
+    created = []
+    for index, item in enumerate(selection_ex or [], start=1):
+        points = _points_from_selection_item(item)
+        if len(points) < 2:
+            continue
+        created.append(
+            create_route_carrier(
+                doc,
+                points,
+                label="QET Route Carrier {0}".format(index),
+                project_uuid=project_uuid,
+                kind=kind,
+            )
+        )
+    return created
+
+
+def _wire_duct_centerline_from_bbox(bbox, margin=DEFAULT_WIRE_DUCT_MARGIN, min_aspect=1.5):
+    extents = {
+        axis: _bbox_extent(bbox, axis)
+        for axis in ("x", "y", "z")
+    }
+    main_axis = max(extents, key=extents.get)
+    sorted_extents = sorted(extents.values(), reverse=True)
+    if sorted_extents[0] <= DEFAULT_NODE_TOLERANCE:
+        return []
+    if len(sorted_extents) > 1 and sorted_extents[1] > DEFAULT_NODE_TOLERANCE:
+        if sorted_extents[0] / sorted_extents[1] < float(min_aspect or 1.0):
+            return []
+
+    low, high = _bbox_axis_range(bbox, main_axis)
+    center = _bbox_center(bbox)
+    usable_margin = max(float(margin or 0.0), 0.0)
+    if abs(high - low) <= usable_margin * 2.0:
+        usable_margin = 0.0
+
+    start = _set_axis(center, main_axis, low + usable_margin)
+    end = _set_axis(center, main_axis, high - usable_margin)
+    if _distance(start, end) <= DEFAULT_NODE_TOLERANCE:
+        return []
+    return [start, end]
+
+
+def _wire_duct_sources_from_selection(selection_ex):
+    sources = []
+    seen = set()
+    for item in selection_ex or []:
+        obj = getattr(item, "Object", None)
+        if obj is not None and id(obj) not in seen:
+            seen.add(id(obj))
+            sources.append(obj)
+            continue
+        for sub_object in list(getattr(item, "SubObjects", []) or []):
+            if sub_object is None or id(sub_object) in seen:
+                continue
+            seen.add(id(sub_object))
+            sources.append(sub_object)
+    return sources
+
+
+def _mark_wire_duct_source(source, carrier):
+    if source is None:
+        return
+    try:
+        TerminalObjects.ensure_string_property(
+            source,
+            "QetRoutingSourceKind",
+            PROPERTY_GROUP,
+            "Routing source kind",
+            ROUTE_CARRIER_KIND_WIRE_DUCT,
+        )
+        TerminalObjects.ensure_string_property(
+            source,
+            "QetRoutingObstacleMode",
+            PROPERTY_GROUP,
+            "How auto-routing collision checks should treat this object",
+            WIRE_DUCT_OBSTACLE_MODE,
+        )
+        TerminalObjects.ensure_string_property(
+            source,
+            "QetRouteCarrierName",
+            PROPERTY_GROUP,
+            "Generated route carrier for this source",
+            getattr(carrier, "Name", ""),
+        )
+    except Exception:
+        pass
+
+
+def create_wire_duct_carriers_from_selection(
+    doc,
+    selection_ex,
+    project_uuid="",
+    margin=DEFAULT_WIRE_DUCT_MARGIN,
+    min_aspect=1.5,
+):
+    """Create WireDuct centerline carriers from selected duct-like solids."""
+    created = []
+    for index, source in enumerate(_wire_duct_sources_from_selection(selection_ex), start=1):
+        bbox = _bound_box_from_object(source)
+        if bbox is None:
+            continue
+        points = _wire_duct_centerline_from_bbox(
+            bbox,
+            margin=margin,
+            min_aspect=min_aspect,
+        )
+        if len(points) < 2:
+            continue
+        label = getattr(source, "Label", "") or getattr(source, "Name", "") or "Wire Duct"
+        carrier = create_route_carrier(
+            doc,
+            points,
+            label="QET Wire Duct Centerline {0}".format(label),
+            project_uuid=project_uuid,
+            kind=ROUTE_CARRIER_KIND_WIRE_DUCT,
+        )
+        _mark_wire_duct_source(source, carrier)
+        created.append(carrier)
+    return created
+
+
+def create_surface_carriers_from_selection(
+    doc,
+    selection_ex,
+    project_uuid="",
+    spacing=DEFAULT_SURFACE_LANE_SPACING,
+    offset=DEFAULT_SURFACE_OFFSET,
+    margin=DEFAULT_SURFACE_MARGIN,
+):
+    """Create a supported route grid on selected planar cabinet/panel faces."""
+    created = []
+    for item in selection_ex or []:
+        for sub_object in list(getattr(item, "SubObjects", []) or []):
+            shape_type = (getattr(sub_object, "ShapeType", "") or "").lower()
+            if shape_type != "face":
+                continue
+            grids = _surface_face_grid_points(
+                sub_object,
+                spacing=spacing,
+                offset=offset,
+                margin=margin,
+            )
+            for index, points in enumerate(grids, start=1):
+                if len(points) < 2:
+                    continue
+                carrier = create_route_carrier(
+                    doc,
+                    points,
+                    label="QET Surface Route {0}".format(index),
+                    project_uuid=project_uuid,
+                    kind=ROUTE_CARRIER_KIND_ROUTING_RANGE,
+                )
+                created.append(carrier)
+    return created
+
+
+def _carrier_cost_factor(carrier, kind_cost_factors=None):
+    kind = (getattr(carrier, "QetRouteCarrierKind", "") or "").strip()
+    factors = dict(DEFAULT_KIND_COST_FACTORS)
+    if isinstance(kind_cost_factors, dict):
+        factors.update(kind_cost_factors)
+    try:
+        return max(float(factors.get(kind, 1.0)), 0.01)
+    except Exception:
+        return 1.0
+
+
+def build_route_graph(doc, tolerance=DEFAULT_NODE_TOLERANCE):
+    """Build an undirected graph from every enabled route carrier."""
+    nodes = {}
+    edges = {}
+    carriers = collect_route_carriers(doc)
+    segment_count = 0
+
+    def ensure_node(point):
+        key = _point_key(point, tolerance=tolerance)
+        if key not in nodes:
+            nodes[key] = point
+            edges[key] = []
+        return key
+
+    for carrier in carriers:
+        points = _carrier_points(carrier)
+        if len(points) < 2:
+            continue
+        previous_key = ensure_node(points[0])
+        previous_point = nodes[previous_key]
+        for point in points[1:]:
+            current_key = ensure_node(point)
+            current_point = nodes[current_key]
+            weight = _distance(previous_point, current_point)
+            if weight > tolerance:
+                edges[previous_key].append((current_key, weight, carrier))
+                edges[current_key].append((previous_key, weight, carrier))
+                segment_count += 1
+            previous_key = current_key
+            previous_point = current_point
+
+    return {
+        "nodes": nodes,
+        "edges": edges,
+        "carriers": carriers,
+        "carrier_count": len(carriers),
+        "segment_count": segment_count,
+        "tolerance": tolerance,
+    }
+
+
+def nearest_node(network, point):
+    nodes = network.get("nodes", {}) if isinstance(network, dict) else {}
+    if not nodes:
+        return None, None
+    target = _vector(point)
+    best_key = None
+    best_distance = None
+    for key, node_point in nodes.items():
+        distance = _distance(target, node_point)
+        if best_distance is None or distance < best_distance:
+            best_key = key
+            best_distance = distance
+    return best_key, best_distance
+
+
+def shortest_path(network, start_key, end_key, bend_penalty=0.0, kind_cost_factors=None):
+    """Dijkstra search with a small extra cost when route direction changes."""
+    if start_key is None or end_key is None:
+        return None
+    if start_key == end_key:
+        return [start_key]
+
+    nodes = network.get("nodes", {})
+    edges = network.get("edges", {})
+    queue = []
+    counter = 0
+    start_state = (start_key, None)
+    distances = {start_state: 0.0}
+    previous = {}
+    heapq.heappush(queue, (0.0, counter, start_key, None))
+
+    while queue:
+        cost, _counter, key, previous_direction = heapq.heappop(queue)
+        state = (key, previous_direction)
+        if cost > distances.get(state, float("inf")):
+            continue
+        if key == end_key:
+            path = [key]
+            current_state = state
+            while current_state in previous:
+                current_state = previous[current_state]
+                path.append(current_state[0])
+            path.reverse()
+            return path
+
+        for next_key, weight, carrier in edges.get(key, []):
+            direction = _direction_key(nodes[key], nodes[next_key])
+            bend_cost = 0.0
+            if previous_direction is not None and direction != previous_direction:
+                bend_cost = float(bend_penalty or 0.0)
+            next_state = (next_key, direction)
+            next_cost = cost + float(weight) * _carrier_cost_factor(carrier, kind_cost_factors) + bend_cost
+            if next_cost < distances.get(next_state, float("inf")):
+                distances[next_state] = next_cost
+                previous[next_state] = state
+                counter += 1
+                heapq.heappush(queue, (next_cost, counter, next_key, direction))
+
+    return None
+
+
+def path_points(network, path_keys):
+    nodes = network.get("nodes", {}) if isinstance(network, dict) else {}
+    return [nodes[key] for key in path_keys or [] if key in nodes]
+
+
+def network_summary(doc):
+    network = build_route_graph(doc)
+    kinds = {}
+    for carrier in network.get("carriers", []) or []:
+        kind = (getattr(carrier, "QetRouteCarrierKind", "") or "").strip() or ROUTE_CARRIER_KIND
+        kinds[kind] = kinds.get(kind, 0) + 1
+    return {
+        "carriers": int(network.get("carrier_count", 0)),
+        "segments": int(network.get("segment_count", 0)),
+        "nodes": len(network.get("nodes", {})),
+        "kinds": kinds,
+    }
+
+
+def carrier_payload(carrier):
+    return {
+        "name": getattr(carrier, "Name", ""),
+        "label": getattr(carrier, "Label", ""),
+        "kind": getattr(carrier, "QetRouteCarrierKind", ""),
+        "points": [_point_payload(point) for point in _carrier_points(carrier)],
+    }
diff --git a/tests/manual/freecad_auto_routing_smoke.py b/tests/manual/freecad_auto_routing_smoke.py
new file mode 100644
index 0000000..d0eebeb
--- /dev/null
+++ b/tests/manual/freecad_auto_routing_smoke.py
@@ -0,0 +1,96 @@
+import json
+import os
+import sys
+
+import FreeCAD as App
+
+
+REPO_ROOT = r"D:\LightWork3D"
+MODULE_DIR = os.path.join(REPO_ROOT, "src", "Mod", "FreeCADExchange")
+OUT_DIR = os.path.join(REPO_ROOT, "tests", "out")
+OUT_FCSTD = os.path.join(OUT_DIR, "auto_routing_smoke.FCStd")
+OUT_JSON = os.path.join(OUT_DIR, "auto_routing_smoke_result.json")
+
+if MODULE_DIR not in sys.path:
+    sys.path.insert(0, MODULE_DIR)
+
+import AutoRouting
+import RoutingNetwork
+import TerminalObjects
+import WiringObjects
+
+
+def _make_terminal(doc, name, terminal_uuid, point):
+    terminal = TerminalObjects.create_lcs_object(
+        doc,
+        name,
+        placement=App.Placement(point, App.Rotation()),
+        label=terminal_uuid,
+    )
+    TerminalObjects.set_terminal_semantics(
+        terminal,
+        "project-smoke",
+        "element-" + terminal_uuid,
+        terminal_uuid,
+        "instance-" + terminal_uuid,
+        label=terminal_uuid,
+    )
+    return terminal
+
+
+def _point_payload(point):
+    return {
+        "x": float(point.x),
+        "y": float(point.y),
+        "z": float(point.z),
+    }
+
+
+def main():
+    os.makedirs(OUT_DIR, exist_ok=True)
+    doc = App.newDocument("AutoRoutingSmoke")
+    App.setActiveDocument(doc.Name)
+    TerminalObjects.ensure_root_group(doc, "project-smoke")
+    WiringObjects.initialize_wiring_scene(doc, "project-smoke")
+
+    start = _make_terminal(doc, "SmokeTerminalStart", "terminal-start", App.Vector(0, 0, 0))
+    end = _make_terminal(doc, "SmokeTerminalEnd", "terminal-end", App.Vector(160, 0, 0))
+
+    RoutingNetwork.create_route_carrier(
+        doc,
+        [
+            App.Vector(0, 0, 20),
+            App.Vector(0, 60, 20),
+            App.Vector(160, 60, 20),
+            App.Vector(160, 0, 20),
+        ],
+        label="Smoke Route Carrier",
+        project_uuid="project-smoke",
+    )
+
+    obstacle = doc.addObject("Part::Box", "SmokeObstacle")
+    obstacle.Label = "Smoke Obstacle"
+    obstacle.Length = 40
+    obstacle.Width = 40
+    obstacle.Height = 60
+    obstacle.Placement = App.Placement(App.Vector(60, -20, -10), App.Rotation())
+    doc.recompute()
+
+    result = AutoRouting.route_between_terminals(doc, start, end)
+    payload = {
+        "algorithm": result["algorithm"],
+        "route_status": result["route_status"],
+        "collision_count": result["collision_count"],
+        "points": [_point_payload(point) for point in result["points"]],
+        "network": RoutingNetwork.network_summary(doc),
+        "scene": OUT_FCSTD,
+    }
+
+    doc.saveAs(OUT_FCSTD)
+    with open(OUT_JSON, "w", encoding="utf-8") as handle:
+        json.dump(payload, handle, ensure_ascii=False, indent=2)
+    print(json.dumps(payload, ensure_ascii=False, indent=2))
+
+
+if __name__ == "__main__":
+    main()
diff --git a/tests/python/freecad_exchange_auto_routing_test.py b/tests/python/freecad_exchange_auto_routing_test.py
new file mode 100644
index 0000000..a46edee
--- /dev/null
+++ b/tests/python/freecad_exchange_auto_routing_test.py
@@ -0,0 +1,460 @@
+import importlib
+import sys
+import types
+import unittest
+from pathlib import Path
+
+
+REPO_ROOT = Path(__file__).resolve().parents[2]
+MODULE_DIR = REPO_ROOT / "src" / "Mod" / "FreeCADExchange"
+if str(MODULE_DIR) not in sys.path:
+    sys.path.insert(0, str(MODULE_DIR))
+
+
+def _install_fake_freecad():
+    class Vector:
+        def __init__(self, x=0.0, y=0.0, z=0.0):
+            self.x = float(x)
+            self.y = float(y)
+            self.z = float(z)
+
+    class Rotation:
+        def multVec(self, vector):
+            return vector
+
+    class Placement:
+        def __init__(self, base=None, rotation=None):
+            self.Base = base or Vector()
+            self.Rotation = rotation or Rotation()
+
+        def multVec(self, vector):
+            return Vector(
+                self.Base.x + vector.x,
+                self.Base.y + vector.y,
+                self.Base.z + vector.z,
+            )
+
+    fake_freecad = types.ModuleType("FreeCAD")
+    fake_freecad.Vector = Vector
+    fake_freecad.Rotation = Rotation
+    fake_freecad.Placement = Placement
+    fake_freecad.ActiveDocument = None
+    fake_freecad.Console = types.SimpleNamespace(
+        PrintMessage=lambda *args, **kwargs: None,
+        PrintWarning=lambda *args, **kwargs: None,
+        PrintError=lambda *args, **kwargs: None,
+    )
+    sys.modules["FreeCAD"] = fake_freecad
+
+    fake_gui = types.ModuleType("FreeCADGui")
+    fake_gui.addCommand = lambda *args, **kwargs: None
+    fake_gui.SendMsgToActiveView = lambda *args, **kwargs: None
+    fake_gui.Selection = types.SimpleNamespace(
+        getSelection=lambda: [],
+        getSelectionEx=lambda: [],
+    )
+    sys.modules["FreeCADGui"] = fake_gui
+
+    fake_part = types.ModuleType("Part")
+    fake_part.makePolygon = lambda points: tuple(points)
+    sys.modules["Part"] = fake_part
+
+
+class FakeViewObject:
+    def __init__(self):
+        self.Visibility = True
+        self.LineWidth = None
+        self.LineColor = None
+
+
+class FakeObject:
+    def __init__(self, name, type_id, doc=None):
+        self.Name = name
+        self.Label = name
+        self.TypeId = type_id
+        self.Document = doc
+        self.PropertiesList = []
+        self.Group = []
+        self.ViewObject = FakeViewObject()
+        self.Shape = None
+        self.Points = []
+        self.Placement = sys.modules["FreeCAD"].Placement()
+        self.InList = []
+
+    def isDerivedFrom(self, type_name):
+        if self.TypeId == type_name:
+            return True
+        if type_name == "App::DocumentObjectGroup":
+            return self.TypeId == "App::DocumentObjectGroup"
+        if type_name == "App::LocalCoordinateSystem":
+            return self.TypeId in {"Part::LocalCoordinateSystem", "PartDesign::CoordinateSystem"}
+        return False
+
+    def addProperty(self, prop_type, prop_name, group_name, description):
+        if prop_name not in self.PropertiesList:
+            self.PropertiesList.append(prop_name)
+
+    def addObject(self, child):
+        if child not in self.Group:
+            self.Group.append(child)
+        if self not in child.InList:
+            child.InList.append(self)
+
+
+class FakeDocument:
+    def __init__(self):
+        self.Objects = []
+        self.Name = "FakeDoc"
+
+    def addObject(self, type_name, name):
+        obj = FakeObject(name, type_name, doc=self)
+        self.Objects.append(obj)
+        return obj
+
+    def getObject(self, name):
+        for obj in self.Objects:
+            if obj.Name == name:
+                return obj
+        return None
+
+    def removeObject(self, name):
+        self.Objects = [obj for obj in self.Objects if obj.Name != name]
+
+    def recompute(self):
+        return None
+
+
+class FakeBoundBox:
+    def __init__(self, xmin, xmax, ymin, ymax, zmin, zmax):
+        self.XMin = xmin
+        self.XMax = xmax
+        self.YMin = ymin
+        self.YMax = ymax
+        self.ZMin = zmin
+        self.ZMax = zmax
+
+
+class FakeShape:
+    def __init__(self, bbox, edges=None, faces=None):
+        self.BoundBox = bbox
+        self.Edges = edges or []
+        self.Faces = faces or []
+        self.Solids = []
+        self.Shells = []
+
+
+class FakeVertex:
+    def __init__(self, point):
+        self.Point = point
+
+
+class FakeEdge:
+    ShapeType = "Edge"
+
+    def __init__(self, start, end):
+        self.Vertexes = [FakeVertex(start), FakeVertex(end)]
+
+
+class FakeFace:
+    ShapeType = "Face"
+
+    def __init__(self, bbox, normal):
+        self.BoundBox = bbox
+        self._normal = normal
+
+    def normalAt(self, _u, _v):
+        return self._normal
+
+
+class FakeSelectionItem:
+    def __init__(self, sub_objects=None, obj=None):
+        self.SubObjects = sub_objects or []
+        self.PickedPoints = []
+        self.Object = obj
+
+
+def _reload_modules():
+    for name in [
+        "TerminalObjects",
+        "WiringObjects",
+        "RoutingNetwork",
+        "AutoRouting",
+        "AutoRoutingPanel",
+    ]:
+        sys.modules.pop(name, None)
+    terminal_objects = importlib.import_module("TerminalObjects")
+    wiring_objects = importlib.import_module("WiringObjects")
+    routing_network = importlib.import_module("RoutingNetwork")
+    auto_routing = importlib.import_module("AutoRouting")
+    return terminal_objects, wiring_objects, routing_network, auto_routing
+
+
+def _terminal(doc, terminal_objects, name, terminal_uuid, point):
+    app = sys.modules["FreeCAD"]
+    terminal = doc.addObject("Part::LocalCoordinateSystem", name)
+    terminal.Placement = app.Placement(point, app.Rotation())
+    terminal_objects.set_terminal_semantics(
+        terminal,
+        "project-1",
+        "element-{0}".format(terminal_uuid),
+        terminal_uuid,
+        "instance-{0}".format(terminal_uuid),
+        label=terminal_uuid,
+    )
+    return terminal
+
+
+class AutoRoutingTest(unittest.TestCase):
+    def test_auto_route_selected_terminals_requires_supported_route_by_default(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, _routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(100, 20, 0))
+
+        with self.assertRaises(auto_routing.AutoRoutingError):
+            auto_routing.route_between_terminals(doc, start, end)
+
+    def test_auto_route_can_still_use_explicit_floating_fallback_for_debug(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, _routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(100, 20, 0))
+
+        result = auto_routing.route_between_terminals(
+            doc,
+            start,
+            end,
+            options={"allow_floating_fallback": True},
+        )
+
+        wire = result["wire"]
+        self.assertEqual("orthogonal-v1", result["algorithm"])
+        self.assertEqual("AutoSuggested", wire.RouteType)
+        self.assertEqual("Auto", wire.RouteMode)
+        self.assertEqual("Routed", wire.RouteStatus)
+        self.assertGreaterEqual(len(wire.Points), 4)
+        self.assertIn(wire, doc.getObject("QETWiring_04_Routed").Group)
+
+    def test_auto_route_prefers_user_route_carrier_network(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(120, 0, 0))
+        routing_network.create_route_carrier(
+            doc,
+            [
+                app.Vector(0, 0, 20),
+                app.Vector(0, 30, 20),
+                app.Vector(120, 30, 20),
+                app.Vector(120, 0, 20),
+            ],
+            project_uuid="project-1",
+        )
+
+        result = auto_routing.route_between_terminals(doc, start, end)
+
+        self.assertEqual("network-dijkstra-v1", result["algorithm"])
+        self.assertEqual("Routed", result["route_status"])
+        self.assertTrue(any(point.y == 30.0 for point in result["points"]))
+
+    def test_auto_route_prefers_wire_duct_over_auxiliary_range(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(120, 0, 0))
+        routing_network.create_route_carrier(
+            doc,
+            [app.Vector(0, 0, 20), app.Vector(120, 0, 20)],
+            project_uuid="project-1",
+            kind="RoutingRange",
+        )
+        routing_network.create_route_carrier(
+            doc,
+            [
+                app.Vector(0, 0, 20),
+                app.Vector(0, 40, 20),
+                app.Vector(120, 40, 20),
+                app.Vector(120, 0, 20),
+            ],
+            project_uuid="project-1",
+            kind="WireDuct",
+        )
+
+        result = auto_routing.route_between_terminals(doc, start, end)
+
+        self.assertEqual("network-dijkstra-v1", result["algorithm"])
+        self.assertTrue(any(point.y == 40.0 for point in result["points"]))
+
+    def test_surface_carrier_grid_supports_backplate_routing(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(120, 0, 0))
+        face = FakeFace(
+            FakeBoundBox(0, 120, -20, 120, -1, -1),
+            app.Vector(0, 0, 1),
+        )
+
+        created = routing_network.create_surface_carriers_from_selection(
+            doc,
+            [FakeSelectionItem([face])],
+            project_uuid="project-1",
+            spacing=60.0,
+            offset=5.0,
+            margin=0.0,
+        )
+        result = auto_routing.route_between_terminals(doc, start, end)
+
+        self.assertGreater(len(created), 0)
+        self.assertEqual("RoutingRange", getattr(created[0], "QetRouteCarrierKind", ""))
+        self.assertEqual("network-dijkstra-v1", result["algorithm"])
+        self.assertTrue(any(point.z == 4.0 for point in result["points"]))
+
+    def test_route_path_creation_ignores_whole_solid_object_edges(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, _auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        solid = doc.addObject("Part::Feature", "CabinetSolid")
+        solid.Shape = FakeShape(
+            FakeBoundBox(0, 100, 0, 100, 0, 10),
+            edges=[FakeEdge(app.Vector(0, 0, 0), app.Vector(100, 0, 0))],
+            faces=[object()],
+        )
+
+        created = routing_network.create_carriers_from_selection(
+            doc,
+            [FakeSelectionItem(obj=solid)],
+            project_uuid="project-1",
+        )
+
+        self.assertEqual([], created)
+
+    def test_wire_duct_entity_generates_centerline_and_marks_source_pass_through(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, _auto_routing = _reload_modules()
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        duct = doc.addObject("Part::Feature", "WireDuct")
+        duct.Shape = FakeShape(FakeBoundBox(0, 120, -10, 10, 5, 25))
+
+        created = routing_network.create_wire_duct_carriers_from_selection(
+            doc,
+            [FakeSelectionItem(obj=duct)],
+            project_uuid="project-1",
+            margin=20.0,
+        )
+
+        self.assertEqual(1, len(created))
+        carrier = created[0]
+        self.assertEqual("WireDuct", carrier.QetRouteCarrierKind)
+        self.assertEqual("PassThrough", duct.QetRoutingObstacleMode)
+        self.assertEqual([(20.0, 0.0, 15.0), (100.0, 0.0, 15.0)], [(p.x, p.y, p.z) for p in carrier.Points])
+
+    def test_wire_duct_source_is_not_reported_as_collision(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(120, 0, 0))
+        duct = doc.addObject("Part::Feature", "WireDuct")
+        duct.Shape = FakeShape(FakeBoundBox(-10, 130, -10, 10, 15, 25))
+        routing_network.create_wire_duct_carriers_from_selection(
+            doc,
+            [FakeSelectionItem(obj=duct)],
+            project_uuid="project-1",
+            margin=0.0,
+        )
+
+        result = auto_routing.route_between_terminals(doc, start, end)
+
+        self.assertEqual("network-dijkstra-v1", result["algorithm"])
+        self.assertEqual("Routed", result["route_status"])
+        self.assertEqual(0, result["collision_count"])
+
+    def test_auto_route_marks_collision_warning_against_obstacle_bbox(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, _routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(100, 0, 0))
+        _routing_network.create_route_carrier(
+            doc,
+            [app.Vector(0, 0, 100), app.Vector(100, 0, 100)],
+            project_uuid="project-1",
+        )
+        obstacle = doc.addObject("Part::Feature", "Obstacle")
+        obstacle.Shape = FakeShape(FakeBoundBox(40, 60, -10, 10, 90, 110))
+
+        result = auto_routing.route_between_terminals(doc, start, end)
+
+        self.assertEqual("CollisionWarning", result["route_status"])
+        self.assertEqual("CollisionWarning", result["wire"].RouteStatus)
+        self.assertEqual(1, result["collision_count"])
+
+    def test_route_all_from_payload_skips_missing_terminal(self):
+        _install_fake_freecad()
+        terminal_objects, _wiring_objects, _routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        payload = {
+            "wires": [
+                {
+                    "wire_id": "wire-1",
+                    "start_terminal_uuid": "terminal-start",
+                    "end_terminal_uuid": "terminal-missing",
+                }
+            ]
+        }
+
+        report = auto_routing.route_all_from_payload(doc, payload)
+
+        self.assertEqual(0, report["routed"])
+        self.assertEqual(1, report["skipped_missing_terminal"])
+
+    def test_clear_route_carriers_keeps_routed_wires(self):
+        _install_fake_freecad()
+        terminal_objects, wiring_objects, routing_network, auto_routing = _reload_modules()
+        app = sys.modules["FreeCAD"]
+        doc = FakeDocument()
+        terminal_objects.ensure_root_group(doc, "project-1")
+        start = _terminal(doc, terminal_objects, "TerminalStart", "terminal-start", app.Vector(0, 0, 0))
+        end = _terminal(doc, terminal_objects, "TerminalEnd", "terminal-end", app.Vector(100, 0, 0))
+        routing_network.create_route_carrier(
+            doc,
+            [app.Vector(0, 0, 20), app.Vector(100, 0, 20)],
+            project_uuid="project-1",
+        )
+        wire = auto_routing.route_between_terminals(doc, start, end)["wire"]
+
+        removed = routing_network.clear_route_carriers(doc)
+
+        self.assertEqual(1, removed)
+        self.assertEqual([], routing_network.collect_route_carriers(doc))
+        self.assertIn(wire, wiring_objects.ensure_routed_group(doc, "project-1").Group)
+
+
+if __name__ == "__main__":
+    unittest.main()