feat: add export_sch_python_bom tool (kicad-cli, legacy Python-BOM XML)

New MCP tool `export_sch_python_bom` wrapping `kicad-cli sch export
python-bom`: emits the legacy intermediate XML netlist consumed by the
schematic editor's Python BOM scripts. Minimal option set (outputPath +
schematicPath only, matching the subcommand's --help). schematicPath
required and validated.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

python/kicad_interface.py

@@ -605,6 +605,7 @@ class KiCADInterface:
             "export_sch_dxf": self._handle_export_sch_dxf,
             "export_sch_hpgl": self._handle_export_sch_hpgl,
             "export_sch_ps": self._handle_export_sch_ps,
+            "export_sch_python_bom": self._handle_export_sch_python_bom,
             "generate_netlist": self._handle_generate_netlist,
             "sync_schematic_to_board": self._handle_sync_schematic_to_board,
             "list_schematic_libraries": self._handle_list_schematic_libraries,
@@ -6063,6 +6064,59 @@ class KiCADInterface:
             logger.error(f"Error exporting schematic PostScript: {e}")
             return {"success": False, "message": str(e)}
 
+    def _handle_export_sch_python_bom(self, params: Dict[str, Any]) -> Dict[str, Any]:
+        """Export the legacy Python-BOM XML from a schematic via kicad-cli
+        (`sch export python-bom`).
+
+        Emits the legacy intermediate XML netlist consumed by the schematic
+        editor's Python BOM scripts. Minimal option set (output + input only).
+        schematicPath is required.
+        """
+        import subprocess
+
+        logger.info("Exporting schematic Python-BOM via kicad-cli")
+        try:
+            schematic_path = params.get("schematicPath")
+            output_path = params.get("outputPath")
+
+            if not schematic_path:
+                return {"success": False, "message": "schematicPath is required"}
+            if not os.path.exists(schematic_path):
+                return {"success": False, "message": f"Schematic not found: {schematic_path}"}
+            if not output_path:
+                return {"success": False, "message": "outputPath is required"}
+
+            kicad_cli = self._find_kicad_cli_static()
+            if not kicad_cli:
+                return {"success": False, "message": "kicad-cli not found in PATH"}
+
+            output_path = os.path.abspath(os.path.expanduser(output_path))
+            parent = os.path.dirname(output_path)
+            if parent:
+                os.makedirs(parent, exist_ok=True)
+
+            cmd = [kicad_cli, "sch", "export", "python-bom", "--output", output_path]
+            cmd.append(schematic_path)
+
+            logger.info(f"Running: {' '.join(cmd)}")
+            result = subprocess.run(cmd, capture_output=True, text=True, timeout=180)
+
+            if result.returncode != 0:
+                return {
+                    "success": False,
+                    "message": f"kicad-cli failed (exit {result.returncode}): "
+                    f"{result.stderr.strip()}",
+                }
+            return {"success": True, "outputPath": output_path}
+
+        except FileNotFoundError:
+            return {"success": False, "message": "kicad-cli not found in PATH"}
+        except subprocess.TimeoutExpired:
+            return {"success": False, "message": "kicad-cli timed out after 180 seconds"}
+        except Exception as e:
+            logger.error(f"Error exporting schematic Python-BOM: {e}")
+            return {"success": False, "message": str(e)}
+
     def _handle_generate_netlist(self, params: Dict[str, Any]) -> Dict[str, Any]:
         """Generate netlist from schematic and return structured JSON.
 

src/tools/export.ts

@@ -1318,5 +1318,29 @@ export function registerExportTools(server: McpServer, callKicadScript: CommandF
     },
   );
 
+  // ------------------------------------------------------
+  // Export Schematic Python-BOM Tool (kicad-cli)
+  // ------------------------------------------------------
+  server.tool(
+    "export_sch_python_bom",
+    "Export the legacy Python-BOM intermediate XML from a schematic via kicad-cli (`sch export python-bom`). This is the XML netlist consumed by the schematic editor's Python BOM scripts. Minimal option set (output + input only). schematicPath is REQUIRED.",
+    {
+      schematicPath: z.string().describe("Path to the .kicad_sch (required)"),
+      outputPath: z.string().describe("Output XML file path"),
+    },
+    async (args) => {
+      logger.debug(`Exporting schematic Python-BOM to: ${args.outputPath}`);
+      const result = await callKicadScript("export_sch_python_bom", args);
+      return {
+        content: [
+          {
+            type: "text",
+            text: JSON.stringify(result),
+          },
+        ],
+      };
+    },
+  );
+
   logger.info("Export tools registered");
 }

src/tools/registry.ts

@@ -76,6 +76,7 @@ export const toolCategories: ToolCategory[] = [
       "export_sch_dxf",
       "export_sch_hpgl",
       "export_sch_ps",
+      "export_sch_python_bom",
       "export_pdf",
       "export_svg",
       "export_3d",