Add support for memory distinguished by custom key (resolves #2584)

Co-Authored-By: Joe Moura <joao@crewai.com>

src/crewai/memory/entity/entity_memory.py

@@ -1,3 +1,5 @@
+from typing import Optional
+
 from crewai.memory.entity.entity_memory_item import EntityMemoryItem
 from crewai.memory.memory import Memory
 from crewai.memory.storage.rag_storage import RAGStorage
@@ -38,7 +40,7 @@ class EntityMemory(Memory):
             )
         super().__init__(storage)
 
-    def save(self, item: EntityMemoryItem) -> None:  # type: ignore # BUG?: Signature of "save" incompatible with supertype "Memory"
+    def save(self, item: EntityMemoryItem, custom_key: Optional[str] = None) -> None:  # type: ignore # BUG?: Signature of "save" incompatible with supertype "Memory"
         """Saves an entity item into the SQLite storage."""
         if self.memory_provider == "mem0":
             data = f"""
@@ -49,7 +51,7 @@ class EntityMemory(Memory):
             """
         else:
             data = f"{item.name}({item.type}): {item.description}"
-        super().save(data, item.metadata)
+        super().save(data, item.metadata, custom_key=custom_key)
 
     def reset(self) -> None:
         try:

src/crewai/memory/long_term/long_term_memory.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List
+from typing import Any, Dict, List, Optional
 
 from crewai.memory.long_term.long_term_memory_item import LongTermMemoryItem
 from crewai.memory.memory import Memory
@@ -19,9 +19,12 @@ class LongTermMemory(Memory):
             storage = LTMSQLiteStorage(db_path=path) if path else LTMSQLiteStorage()
         super().__init__(storage)
 
-    def save(self, item: LongTermMemoryItem) -> None:  # type: ignore # BUG?: Signature of "save" incompatible with supertype "Memory"
+    def save(self, item: LongTermMemoryItem, custom_key: Optional[str] = None) -> None:  # type: ignore # BUG?: Signature of "save" incompatible with supertype "Memory"
         metadata = item.metadata
         metadata.update({"agent": item.agent, "expected_output": item.expected_output})
+        if custom_key:
+            metadata.update({"custom_key": custom_key})
+            
         self.storage.save(  # type: ignore # BUG?: Unexpected keyword argument "task_description","score","datetime" for "save" of "Storage"
             task_description=item.task,
             score=metadata["quality"],
@@ -29,8 +32,8 @@ class LongTermMemory(Memory):
             datetime=item.datetime,
         )
 
-    def search(self, task: str, latest_n: int = 3) -> List[Dict[str, Any]]:  # type: ignore # signature of "search" incompatible with supertype "Memory"
-        return self.storage.load(task, latest_n)  # type: ignore # BUG?: "Storage" has no attribute "load"
+    def search(self, task: str, latest_n: int = 3, custom_key: Optional[str] = None) -> List[Dict[str, Any]]:  # type: ignore # signature of "search" incompatible with supertype "Memory"
+        return self.storage.load(task, latest_n, custom_key)  # type: ignore # BUG?: "Storage" has no attribute "load"
 
     def reset(self) -> None:
         self.storage.reset()

src/crewai/memory/memory.py

@@ -5,7 +5,10 @@ from crewai.memory.storage.rag_storage import RAGStorage
 
 class Memory:
     """
-    Base class for memory, now supporting agent tags and generic metadata.
+    Base class for memory, now supporting agent tags, generic metadata, and custom keys.
+    
+    Custom keys allow scoping memories to specific entities (users, accounts, sessions),
+    retrieving memories contextually, and preventing data leakage across logical boundaries.
     """
 
     def __init__(self, storage: RAGStorage):
@@ -16,10 +19,13 @@ class Memory:
         value: Any,
         metadata: Optional[Dict[str, Any]] = None,
         agent: Optional[str] = None,
+        custom_key: Optional[str] = None,
     ) -> None:
         metadata = metadata or {}
         if agent:
             metadata["agent"] = agent
+        if custom_key:
+            metadata["custom_key"] = custom_key
 
         self.storage.save(value, metadata)
 
@@ -28,7 +34,12 @@ class Memory:
         query: str,
         limit: int = 3,
         score_threshold: float = 0.35,
+        custom_key: Optional[str] = None,
     ) -> List[Any]:
+        filter_dict = None
+        if custom_key:
+            filter_dict = {"custom_key": {"$eq": custom_key}}
+            
         return self.storage.search(
-            query=query, limit=limit, score_threshold=score_threshold
+            query=query, limit=limit, score_threshold=score_threshold, filter=filter_dict
         )

src/crewai/memory/short_term/short_term_memory.py

@@ -46,22 +46,31 @@ class ShortTermMemory(Memory):
         value: Any,
         metadata: Optional[Dict[str, Any]] = None,
         agent: Optional[str] = None,
+        custom_key: Optional[str] = None,
     ) -> None:
         item = ShortTermMemoryItem(data=value, metadata=metadata, agent=agent)
         if self.memory_provider == "mem0":
             item.data = f"Remember the following insights from Agent run: {item.data}"
 
-        super().save(value=item.data, metadata=item.metadata, agent=item.agent)
+        super().save(value=item.data, metadata=item.metadata, agent=item.agent, custom_key=custom_key)
 
     def search(
         self,
         query: str,
         limit: int = 3,
         score_threshold: float = 0.35,
+        custom_key: Optional[str] = None,
     ):
+        filter_dict = None
+        if custom_key:
+            filter_dict = {"custom_key": {"$eq": custom_key}}
+            
         return self.storage.search(
-            query=query, limit=limit, score_threshold=score_threshold
-        )  # type: ignore # BUG? The reference is to the parent class, but the parent class does not have this parameters
+            query=query, 
+            limit=limit, 
+            score_threshold=score_threshold,
+            filter=filter_dict
+        )
 
     def reset(self) -> None:
         try:

src/crewai/memory/storage/ltm_sqlite_storage.py

@@ -70,22 +70,31 @@ class LTMSQLiteStorage:
             )
 
     def load(
-        self, task_description: str, latest_n: int
+        self, task_description: str, latest_n: int, custom_key: Optional[str] = None
     ) -> Optional[List[Dict[str, Any]]]:
         """Queries the LTM table by task description with error handling."""
         try:
             with sqlite3.connect(self.db_path) as conn:
                 cursor = conn.cursor()
-                cursor.execute(
-                    f"""
+                
+                query = """
                     SELECT metadata, datetime, score
                     FROM long_term_memories
                     WHERE task_description = ?
+                """
+                
+                params = [task_description]
+                
+                if custom_key:
+                    query += " AND json_extract(metadata, '$.custom_key') = ?"
+                    params.append(custom_key)
+                
+                query += f"""
                     ORDER BY datetime DESC, score ASC
                     LIMIT {latest_n}
-                """,  # nosec
-                    (task_description,),
-                )
+                """
+                
+                cursor.execute(query, params)
                 rows = cursor.fetchall()
                 if rows:
                     return [

src/crewai/memory/storage/rag_storage.py

@@ -120,7 +120,11 @@ class RAGStorage(BaseRAGStorage):
 
         try:
             with suppress_logging():
-                response = self.collection.query(query_texts=query, n_results=limit)
+                response = self.collection.query(
+                    query_texts=query, 
+                    n_results=limit,
+                    where=filter
+                )
 
             results = []
             for i in range(len(response["ids"][0])):

src/crewai/memory/user/user_memory.py

@@ -26,20 +26,27 @@ class UserMemory(Memory):
         value,
         metadata: Optional[Dict[str, Any]] = None,
         agent: Optional[str] = None,
+        custom_key: Optional[str] = None,
     ) -> None:
         # TODO: Change this function since we want to take care of the case where we save memories for the usr
         data = f"Remember the details about the user: {value}"
-        super().save(data, metadata)
+        super().save(data, metadata, custom_key=custom_key)
 
     def search(
         self,
         query: str,
         limit: int = 3,
         score_threshold: float = 0.35,
+        custom_key: Optional[str] = None,
     ):
+        filter_dict = None
+        if custom_key:
+            filter_dict = {"custom_key": {"$eq": custom_key}}
+            
         results = self.storage.search(
             query=query,
             limit=limit,
             score_threshold=score_threshold,
+            filter=filter_dict,
         )
         return results

tests/memory/custom_key_memory_test.py

@@ -0,0 +1,57 @@
+import pytest
+from unittest.mock import patch, MagicMock
+
+from crewai.memory.short_term.short_term_memory import ShortTermMemory
+from crewai.memory.short_term.short_term_memory_item import ShortTermMemoryItem
+from crewai.agent import Agent
+from crewai.crew import Crew
+from crewai.task import Task
+
+
+@pytest.fixture
+def short_term_memory():
+    """Fixture to create a ShortTermMemory instance"""
+    agent = Agent(
+        role="Researcher",
+        goal="Search relevant data and provide results",
+        backstory="You are a researcher at a leading tech think tank.",
+        tools=[],
+        verbose=True,
+    )
+
+    task = Task(
+        description="Perform a search on specific topics.",
+        expected_output="A list of relevant URLs based on the search query.",
+        agent=agent,
+    )
+    return ShortTermMemory(crew=Crew(agents=[agent], tasks=[task]))
+
+
+def test_save_with_custom_key(short_term_memory):
+    """Test that save method correctly passes custom_key to storage"""
+    with patch.object(short_term_memory.storage, 'save') as mock_save:
+        short_term_memory.save(
+            value="Test data",
+            metadata={"task": "test_task"},
+            agent="test_agent",
+            custom_key="user123",
+        )
+        
+        called_args = mock_save.call_args[0]
+        called_kwargs = mock_save.call_args[1]
+        
+        assert "custom_key" in called_args[1]
+        assert called_args[1]["custom_key"] == "user123"
+
+
+def test_search_with_custom_key(short_term_memory):
+    """Test that search method correctly passes custom_key to storage"""
+    expected_results = [{"context": "Test data", "metadata": {"custom_key": "user123"}, "score": 0.95}]
+    
+    with patch.object(short_term_memory.storage, 'search', return_value=expected_results) as mock_search:
+        results = short_term_memory.search("test query", custom_key="user123")
+        
+        mock_search.assert_called_once()
+        filter_arg = mock_search.call_args[1].get('filter')
+        assert filter_arg == {"custom_key": {"$eq": "user123"}}
+        assert results == expected_results