* Python 3.14 compatibility

* Skip non-.py files in plugin loader to avoid crashes on stale .pyc bytecode
* Use class-defined _NodeSpec for INTERNAL_ATTRS.BUILTINS so __firstlineno__ and __static_attributes__ (added in Python 3.12+) are properly filtered
* Bump python_requires upper bound from <3.12 to <3.15

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: ImLucasBrown

nxt/nxt_node.py

@@ -40,7 +40,9 @@ class INTERNAL_ATTRS(object):
     CACHED_CODE = _prefix + 'cached_code'
     # List of python attrs that a node will have but we don't want to parse or
     # considering in our composite logic
-    BUILTINS = tuple(dir(type('NodeSpec', (object,), {})))
+    class _NodeSpec(object):
+        pass
+    BUILTINS = tuple(dir(_NodeSpec))
     # A list of node attrs that are used internally in our composite logic but
     # tracked and like user attrs with a `_source__nxt` meta attr
     TRACKED = (COMPUTE, EXECUTE_IN, COMMENT, START_POINT, ENABLED,

nxt/plugin_loader.py

@@ -20,6 +20,8 @@ def load_plugins():
         if not os.path.isdir(plugin_dir):
             continue
         for file_name in os.listdir(plugin_dir):
+            if not file_name.endswith('.py'):
+                continue
             mod_name, _ = os.path.splitext(file_name)
             if mod_name in _nxt_loaded_plugin_module_names:
                 continue

setup.py

@@ -26,7 +26,7 @@
     long_description_content_type="text/markdown",
     url="https://github.com/nxt-dev/nxt",
     packages=setuptools.find_packages(),
-    python_requires='>=3.7, <3.12',
+    python_requires='>=3.7, <3.15',
     entry_points={
         'console_scripts': [
             'nxt=nxt.cli:main',