执行 AGENTS align-linuxcnc 加速规则

结论：补强 WASM Python C API 可执行探针，依据 LinuxCNC src/emc/rs274ngc/gcodemodule.cc、interpmodule.cc 和 py*.cc 对 PyObject_New、Py_TYPE、Py_None、PyList_Type 等 Python C API 的绑定用法。验证通过：./test-linuxcnc-wasm-python-c-api-symbols.sh、./test-native.sh、./test-linuxcnc-source-link.sh。

core/wasm_shims/python_c_api_probe_main.cc

@@ -0,0 +1,73 @@
+#include "boost/python/object.hpp"
+
+#include <cstdlib>
+#include <cstring>
+
+// LinuxCNC source basis: src/emc/rs274ngc/gcodemodule.cc,
+// interpmodule.cc, and py*.cc use these Python C API entry points while
+// defining RS274 Python binding objects. The WASM shim keeps the API inert
+// and link-safe while browser Python execution remains disabled.
+namespace {
+
+struct ProbeObject {
+    PyObject_HEAD
+    int value;
+};
+
+} // namespace
+
+int main() {
+    if (Py_IsInitialized() != 1) {
+        return 1;
+    }
+    if (PyErr_Occurred() != nullptr) {
+        return 2;
+    }
+    PyObject *exc = reinterpret_cast<PyObject *>(1);
+    PyObject *val = reinterpret_cast<PyObject *>(1);
+    PyObject *tb = reinterpret_cast<PyObject *>(1);
+    PyErr_Fetch(&exc, &val, &tb);
+    if (exc || val || tb) {
+        return 3;
+    }
+    if (!Py_None || !Py_TYPE(Py_None) || std::strcmp(Py_TYPE(Py_None)->tp_name, "NoneType") != 0) {
+        return 4;
+    }
+    if (PyUnicode_FromString("linuxcnc") != Py_None) {
+        return 5;
+    }
+    if (std::strcmp(PyUnicode_AsUTF8(Py_None), "") != 0) {
+        return 6;
+    }
+    if (PyLong_FromLong(7) != Py_None || PyLong_AsLong(Py_None) != 0) {
+        return 7;
+    }
+    if (PyFloat_AsDouble(Py_None) != 0.0) {
+        return 8;
+    }
+    if (PyTuple_New(2) != Py_None || PyTuple_SetItem(Py_None, 0, Py_None) != 0 || PyTuple_Size(Py_None) != 0) {
+        return 9;
+    }
+    if (PyList_New(2) != Py_None || PyList_SetItem(Py_None, 0, Py_None) != 0 || PyList_Size(Py_None) != 0) {
+        return 10;
+    }
+    if (PyObject_IsTrue(Py_None) != 0 || PyCallable_Check(Py_None) != 0 || PyObject_IsInstance(Py_None, Py_None) != 0) {
+        return 11;
+    }
+    ProbeObject *probe = PyObject_New(ProbeObject, &PyList_Type);
+    if (!probe || Py_TYPE(reinterpret_cast<PyObject *>(probe)) != &PyList_Type) {
+        std::free(probe);
+        return 12;
+    }
+    std::free(probe);
+    if (PyModule_Create(nullptr) != Py_None || PyModule_AddObject(Py_None, "value", Py_None) != 0) {
+        return 13;
+    }
+    if (PyType_Ready(&PyList_Type) != 0 || PyType_GenericNew(&PyList_Type, Py_None, Py_None) != Py_None) {
+        return 14;
+    }
+    if (PyErr_Format(PyExc_TypeError, "linuxcnc") != nullptr) {
+        return 15;
+    }
+    return 0;
+}