implement windows support of the extension

tests/test_native_host.py

@@ -18,8 +18,9 @@ def test_cleanup_removes_socket_and_registry_entry(monkeypatch, tmp_path):
     registry_path = tmp_path / "registry.json"
     registry_path.write_text(json.dumps({alias: str(socket_path), "other": str(tmp_path / "other.sock")}))
 
-    monkeypatch.setattr(native_host, "SOCKET_DIR", tmp_path)
     monkeypatch.setattr(native_host, "REGISTRY_PATH", registry_path)
+    monkeypatch.setattr(native_host, "_socket_path_for", lambda alias: str(socket_path))
+    monkeypatch.setattr(native_host, "is_windows", lambda: False)
 
     native_host._cleanup(alias)
 
@@ -41,6 +42,18 @@ def test_stdin_reader_cleans_up_on_eof(monkeypatch):
     assert cleaned == ["work"]
 
 
+def test_cleanup_windows_skips_socket_unlink(monkeypatch, tmp_path):
+    registry_path = tmp_path / "registry.json"
+    registry_path.write_text(json.dumps({"work": r"\\.\pipe\browser-cli-work"}))
+
+    monkeypatch.setattr(native_host, "REGISTRY_PATH", registry_path)
+    monkeypatch.setattr(native_host, "is_windows", lambda: True)
+
+    native_host._cleanup("work")
+
+    assert json.loads(registry_path.read_text()) == {}
+
+
 def test_stdin_reader_cleans_up_on_bye(monkeypatch):
     cleaned = []
     messages = iter([{"type": "bye"}])