Harden package paths and storage writes

tests/test_runtime_storage.py

@@ -0,0 +1,33 @@
+import json
+import tempfile
+import unittest
+from pathlib import Path
+
+from beeos.core.runtime_api import BeeStorageAPI
+
+
+class BeeStorageAPITests(unittest.TestCase):
+    def test_set_persists_json_and_leaves_no_temporary_file(self):
+        with tempfile.TemporaryDirectory() as temp_dir:
+            storage_file = Path(temp_dir) / "storage.json"
+            storage = BeeStorageAPI(storage_file)
+
+            storage.set("launches", 3)
+
+            self.assertEqual(storage.get("launches"), 3)
+            self.assertEqual(json.loads(storage_file.read_text(encoding="utf-8")), {"launches": 3})
+            self.assertFalse(storage_file.with_name("storage.json.tmp").exists())
+
+    def test_delete_removes_key_without_corrupting_other_values(self):
+        with tempfile.TemporaryDirectory() as temp_dir:
+            storage = BeeStorageAPI(Path(temp_dir) / "storage.json")
+            storage.set("launches", 3)
+            storage.set("theme", "yellow")
+
+            storage.delete("launches")
+
+            self.assertEqual(storage.all(), {"theme": "yellow"})
+
+
+if __name__ == "__main__":
+    unittest.main()