feat: Adds new interface for MemoryEntry.

PiperOrigin-RevId: 758448993

src/google/adk/memory/memory_entry.py

@@ -0,0 +1,37 @@
+# Copyright 2025 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+
+from __future__ import annotations
+
+from typing import Optional
+
+from google.genai import types
+from pydantic import BaseModel
+
+
+class MemoryEntry(BaseModel):
+  """Represent one memory entry."""
+
+  content: types.Content
+  """The main content of the memory."""
+
+  author: Optional[str] = None
+  """The author of the memory."""
+
+  timestamp: Optional[str] = None
+  """The timestamp when the original content of this memory happened.
+
+  This string will be forwarded to LLM. Preferred format is ISO 8601 format.
+  """