diff --git a/python/commands/board/outline.py b/python/commands/board/outline.py
index d003213..9f34549 100644
--- a/python/commands/board/outline.py
+++ b/python/commands/board/outline.py
@@ -30,13 +30,33 @@ class BoardOutlineCommands:
             shape = params.get("shape", "rectangle")
             width = params.get("width")
             height = params.get("height")
-            center_x = params.get("centerX", 0)
-            center_y = params.get("centerY", 0)
             radius = params.get("radius")
-            corner_radius = params.get("cornerRadius", 0)
+            # Accept both "cornerRadius" and "radius" (schema uses "radius" for rounded_rectangle)
+            corner_radius = params.get("cornerRadius", params.get("radius", 0) if shape == "rounded_rectangle" else 0)
             points = params.get("points", [])
             unit = params.get("unit", "mm")
 
+            # Position: accept top-left corner (x/y) or center (centerX/centerY).
+            # Default: top-left at (0,0) so the board occupies positive coordinate space
+            # and is consistent with component placement coordinates.
+            x = params.get("x")
+            y = params.get("y")
+            if x is not None or y is not None:
+                ox = x if x is not None else 0.0
+                oy = y if y is not None else 0.0
+                center_x = ox + (width or 0) / 2.0
+                center_y = oy + (height or 0) / 2.0
+            else:
+                raw_cx = params.get("centerX")
+                raw_cy = params.get("centerY")
+                if raw_cx is not None or raw_cy is not None:
+                    center_x = raw_cx if raw_cx is not None else 0.0
+                    center_y = raw_cy if raw_cy is not None else 0.0
+                else:
+                    # No position given → place top-left at (0,0)
+                    center_x = (width or 0) / 2.0
+                    center_y = (height or 0) / 2.0
+
             if shape not in ["rectangle", "circle", "polygon", "rounded_rectangle"]:
                 return {
                     "success": False,
diff --git a/python/kicad_interface.py b/python/kicad_interface.py
index 4fba299..9b9ac94 100644
--- a/python/kicad_interface.py
+++ b/python/kicad_interface.py
@@ -2131,7 +2131,17 @@ print("ok")
             return {"success": False, "message": str(e)}
 
     def _ipc_add_board_outline(self, params):
-        """IPC handler for add_board_outline - adds board edge with real-time UI update"""
+        """IPC handler for add_board_outline - adds board edge with real-time UI update.
+        Rounded rectangles are delegated to the SWIG path because the IPC BoardSegment
+        type cannot represent arcs; the SWIG path writes directly to the .kicad_pcb file
+        and correctly generates PCB_SHAPE arcs for rounded corners.
+        """
+        shape = params.get("shape", "rectangle")
+        if shape == "rounded_rectangle":
+            # IPC path only supports straight segments — fall back to SWIG for arcs
+            logger.info("_ipc_add_board_outline: delegating rounded_rectangle to SWIG path for arc support")
+            return self.board_commands.add_board_outline(params)
+
         try:
             from kipy.board_types import BoardSegment
             from kipy.geometry import Vector2
diff --git a/python/schemas/tool_schemas.py b/python/schemas/tool_schemas.py
index 7a752b0..d692da6 100644
--- a/python/schemas/tool_schemas.py
+++ b/python/schemas/tool_schemas.py
@@ -110,7 +110,7 @@ BOARD_TOOLS = [
     {
         "name": "add_board_outline",
         "title": "Add Board Outline",
-        "description": "Adds a board outline shape (rectangle, rounded rectangle, circle, or polygon) on the Edge.Cuts layer.",
+        "description": "Adds a board outline shape (rectangle, rounded_rectangle, circle, or polygon) on the Edge.Cuts layer. By default the board top-left corner is placed at (0, 0) so all coordinates are positive. Use x/y to set a different top-left corner position.",
         "inputSchema": {
             "type": "object",
             "properties": {
@@ -129,19 +129,26 @@ BOARD_TOOLS = [
                     "description": "Height in mm (for rectangle/rounded_rectangle)",
                     "minimum": 1
                 },
+                "x": {
+                    "type": "number",
+                    "description": "X coordinate of the top-left corner in mm (default: 0). Board extends from x to x+width."
+                },
+                "y": {
+                    "type": "number",
+                    "description": "Y coordinate of the top-left corner in mm (default: 0). Board extends from y to y+height."
+                },
                 "radius": {
                     "type": "number",
-                    "description": "Radius in mm (for circle) or corner radius (for rounded_rectangle)",
+                    "description": "Corner radius in mm for rounded_rectangle, or radius for circle",
                     "minimum": 0
                 },
                 "points": {
                     "type": "array",
-                    "description": "Array of [x, y] coordinates in mm (for polygon)",
+                    "description": "Array of {x, y} point objects in mm (for polygon shape only)",
                     "items": {
-                        "type": "array",
-                        "items": {"type": "number"},
-                        "minItems": 2,
-                        "maxItems": 2
+                        "type": "object",
+                        "properties": {"x": {"type": "number"}, "y": {"type": "number"}},
+                        "required": ["x", "y"]
                     },
                     "minItems": 3
                 }