Update DP APIs to support namespace re-design

src/bedrock_agentcore/_utils/namespace.py

@@ -0,0 +1,28 @@
+"""Namespace utilities for data plane API calls."""
+
+from typing import Dict, Optional
+
+
+def build_namespace_params(namespace: Optional[str] = None, namespace_path: Optional[str] = None) -> Dict[str, str]:
+    """Build the namespace kwargs for a data plane API call.
+
+    Exactly one of ``namespace`` (exact match) or ``namespace_path``
+    (hierarchical path prefix) must be provided. Wildcards (``*``) are not
+    supported in either field.
+
+    Raises:
+        ValueError: if both arguments are provided, neither is provided, or
+            the provided value contains a wildcard.
+    """
+    if namespace is not None and namespace_path is not None:
+        raise ValueError("'namespace' and 'namespace_path' are mutually exclusive.")
+    if namespace is None and namespace_path is None:
+        raise ValueError("At least one of 'namespace' or 'namespace_path' must be provided.")
+
+    value = namespace if namespace is not None else namespace_path
+    if "*" in value:
+        raise ValueError("Wildcards (*) are not supported in namespaces.")
+
+    if namespace is not None:
+        return {"namespace": namespace}
+    return {"namespacePath": namespace_path}

src/bedrock_agentcore/memory/client.py

@@ -20,6 +20,7 @@
 from botocore.config import Config
 from botocore.exceptions import ClientError
 
+from bedrock_agentcore._utils.namespace import build_namespace_params
 from bedrock_agentcore._utils.snake_case import accept_snake_case_kwargs
 from bedrock_agentcore._utils.user_agent import build_user_agent_suffix
 
@@ -126,8 +127,11 @@ def __getattr__(self, name: str):
             # Access any boto3 method directly
             client = MemoryClient()
 
-            # These calls are forwarded to the appropriate boto3 client
-            response = client.list_memory_records(memoryId="mem-123", namespace="test/")
+            # These calls are forwarded to the appropriate boto3 client.
+            # Use `namespace` for exact match, or `namespace_path` for
+            # hierarchical path-prefix retrieval.
+            response = client.list_memory_records(memoryId="mem-123", namespace="/actor/Jane/")
+            response = client.list_memory_records(memoryId="mem-123", namespace_path="/org/MyOrg/")
             metadata = client.get_memory_metadata(memoryId="mem-123")
         """
         if name in self._ALLOWED_GMDP_METHODS and hasattr(self.gmdp_client, name):
@@ -307,46 +311,48 @@ def create_memory_and_wait(
         raise TimeoutError("Memory %s did not become ACTIVE within %d seconds" % (memory_id, max_wait))
 
     def retrieve_memories(
-        self, memory_id: str, namespace: str, query: str, actor_id: Optional[str] = None, top_k: int = 3
+        self,
+        memory_id: str,
+        namespace: Optional[str] = None,
+        query: str = None,
+        actor_id: Optional[str] = None,
+        top_k: int = 3,
+        namespace_path: Optional[str] = None,
     ) -> List[Dict[str, Any]]:
-        """Retrieve relevant memories from a namespace.
+        """Retrieve relevant memories using exact match or hierarchical path prefix.
 
-        Note: Wildcards (*) are NOT supported in namespaces. You must provide the
-        exact namespace path with all variables resolved.
+        Exactly one of ``namespace`` or ``namespace_path`` must be provided.
 
         Args:
             memory_id: Memory resource ID
-            namespace: Exact namespace path (no wildcards)
-            query: Search query
+            namespace: Exact namespace to match (e.g., "/actor/Jane/")
+            query: Search query (required)
             actor_id: Optional actor ID (deprecated, use namespace)
             top_k: Number of results to return
+            namespace_path: Hierarchical path prefix (e.g., "/org/team/")
 
         Returns:
-            List of memory records
-
-        Example:
-            # Correct - exact namespace
-            memories = client.retrieve_memories(
-                memory_id="mem-123",
-                namespace="support/facts/session-456/",
-                query="customer preferences"
-            )
-
-            # Incorrect - wildcards not supported
-            # memories = client.retrieve_memories(..., namespace="support/facts/*/", ...)
+            List of memory records. Returns an empty list if the namespace
+            arguments are invalid (both provided, neither provided, or contain
+            wildcards) or if the service call fails.
         """
-        if "*" in namespace:
-            logger.error("Wildcards are not supported in namespaces. Please provide exact namespace.")
+        if query is None:
+            raise TypeError("retrieve_memories() missing required argument: 'query'")
+
+        try:
+            ns_params = build_namespace_params(namespace, namespace_path)
+        except ValueError as e:
+            logger.error(str(e))
             return []
 
+        ns_value = namespace or namespace_path
+
         try:
-            # Let service handle all namespace validation
             response = self.gmdp_client.retrieve_memory_records(
-                memoryId=memory_id, namespace=namespace, searchCriteria={"searchQuery": query, "topK": top_k}
+                memoryId=memory_id, searchCriteria={"searchQuery": query, "topK": top_k}, **ns_params
             )
-
             memories = response.get("memoryRecordSummaries", [])
-            logger.info("Retrieved %d memories from namespace: %s", len(memories), namespace)
+            logger.info("Retrieved %d memories from namespace: %s", len(memories), ns_value)
             return memories
 
         except ClientError as e:
@@ -357,7 +363,7 @@ def retrieve_memories(
                 logger.warning(
                     "Memory or namespace not found. Ensure memory %s exists and namespace '%s' is configured",
                     memory_id,
-                    namespace,
+                    ns_value,
                 )
             elif error_code == "ValidationException":
                 logger.warning("Invalid search parameters: %s", error_msg)
@@ -662,6 +668,7 @@ def process_turn_with_llm(
         retrieval_query: Optional[str] = None,
         top_k: int = 3,
         event_timestamp: Optional[datetime] = None,
+        retrieval_namespace_path: Optional[str] = None,
     ) -> Tuple[List[Dict[str, Any]], str, Dict[str, Any]]:
         r"""Complete conversation turn with LLM callback integration.
 
@@ -676,10 +683,11 @@ def process_turn_with_llm(
             llm_callback: Function that takes (user_input, memories) and returns agent_response
                          The callback receives the user input and retrieved memories,
                          and should return the agent's response string
-            retrieval_namespace: Namespace to search for memories (optional)
+            retrieval_namespace: Namespace for exact match retrieval (optional)
             retrieval_query: Custom search query (defaults to user_input)
             top_k: Number of memories to retrieve
             event_timestamp: Optional timestamp for the event
+            retrieval_namespace_path: Namespace path for hierarchical prefix retrieval (optional)
 
         Returns:
             Tuple of (retrieved_memories, agent_response, created_event)
@@ -709,10 +717,14 @@ def my_llm(user_input: str, memories: List[Dict]) -> str:
         """
         # Step 1: Retrieve relevant memories
         retrieved_memories = []
-        if retrieval_namespace:
+        if retrieval_namespace or retrieval_namespace_path:
             search_query = retrieval_query or user_input
             retrieved_memories = self.retrieve_memories(
-                memory_id=memory_id, namespace=retrieval_namespace, query=search_query, top_k=top_k
+                memory_id=memory_id,
+                namespace=retrieval_namespace,
+                namespace_path=retrieval_namespace_path,
+                query=search_query,
+                top_k=top_k,
             )
             logger.info("Retrieved %d memories for LLM context", len(retrieved_memories))
 

src/bedrock_agentcore/memory/integrations/strands/session_manager.py

@@ -848,7 +848,7 @@ def retrieve_for_namespace(namespace: str, retrieval_config: RetrievalConfig):
 
             memories = self.memory_client.retrieve_memories(
                 memory_id=self.config.memory_id,
-                namespace=resolved_namespace,
+                namespace_path=resolved_namespace,
                 query=user_query,
                 top_k=retrieval_config.top_k,
             )

src/bedrock_agentcore/memory/session.py

@@ -913,7 +913,7 @@ def search_long_term_memories(
         params = {
             "memoryId": self._memory_id,
             "searchCriteria": search_criteria,
-            "namespace": namespace,
+            "namespacePath": namespace,
             "maxResults": max_results,
         }
 
@@ -940,7 +940,7 @@ def list_long_term_memory_records(
 
             params = {
                 "memoryId": self._memory_id,
-                "namespace": namespace_prefix,
+                "namespacePath": namespace_prefix,
             }
 
             if strategy_id:

tests/bedrock_agentcore/memory/test_client.py

@@ -1,11 +1,13 @@
 """Unit tests for Memory Client - no external connections."""
 
+import logging
 import time
 import uuid
 import warnings
 from datetime import datetime
 from unittest.mock import MagicMock, patch
 
+import pytest
 from botocore.exceptions import ClientError
 
 from bedrock_agentcore.memory import MemoryClient
@@ -1627,6 +1629,68 @@ def test_retrieve_memories_wildcard_namespace():
         assert not mock_gmdp.retrieve_memory_records.called
 
 
+def test_retrieve_memories_with_namespace_path():
+    """Test retrieve_memories uses namespacePath for hierarchical retrieval."""
+    with patch("boto3.Session"):
+        client = MemoryClient()
+
+        mock_gmdp = MagicMock()
+        mock_gmdp.retrieve_memory_records.return_value = {"memoryRecordSummaries": [{"memoryRecordId": "rec-1"}]}
+        client.gmdp_client = mock_gmdp
+
+        result = client.retrieve_memories(memory_id="mem-123", namespace_path="/org/team/", query="test", top_k=3)
+
+        assert len(result) == 1
+        call_kwargs = mock_gmdp.retrieve_memory_records.call_args[1]
+        assert "namespacePath" in call_kwargs
+        assert call_kwargs["namespacePath"] == "/org/team/"
+        assert "namespace" not in call_kwargs
+
+
+def test_retrieve_memories_mutual_exclusivity(caplog):
+    """Test retrieve_memories soft-fails when both namespace and namespace_path are passed."""
+    with patch("boto3.Session"):
+        client = MemoryClient()
+
+        mock_gmdp = MagicMock()
+        client.gmdp_client = mock_gmdp
+
+        with caplog.at_level(logging.ERROR):
+            result = client.retrieve_memories(memory_id="mem-123", namespace="/a/", namespace_path="/b/", query="test")
+
+        # Should log the error and return [] without calling the service
+        assert result == []
+        assert not mock_gmdp.retrieve_memory_records.called
+        assert any(
+            "mutually exclusive" in record.message and record.levelno == logging.ERROR for record in caplog.records
+        )
+
+
+def test_retrieve_memories_missing_namespace_and_path(caplog):
+    """Test retrieve_memories soft-fails when neither namespace nor namespace_path is passed."""
+    with patch("boto3.Session"):
+        client = MemoryClient()
+
+        mock_gmdp = MagicMock()
+        client.gmdp_client = mock_gmdp
+
+        with caplog.at_level(logging.ERROR):
+            result = client.retrieve_memories(memory_id="mem-123", query="test")
+
+        assert result == []
+        assert not mock_gmdp.retrieve_memory_records.called
+        assert any("At least one" in record.message and record.levelno == logging.ERROR for record in caplog.records)
+
+
+def test_retrieve_memories_missing_query_raises():
+    """Test retrieve_memories raises TypeError when query is omitted."""
+    with patch("boto3.Session"):
+        client = MemoryClient()
+
+        with pytest.raises(TypeError, match="query"):
+            client.retrieve_memories(memory_id="mem-123", namespace="/actor/Jane/")
+
+
 def test_add_semantic_strategy_and_wait():
     """Test add_semantic_strategy_and_wait functionality."""
     with patch("boto3.Session"):

tests/bedrock_agentcore/memory/test_session.py

@@ -1197,7 +1197,7 @@ def test_search_long_term_memories_success(self):
             assert call_args["memoryId"] == "testMemory-1234567890"
             assert call_args["searchCriteria"]["searchQuery"] == "test query"
             assert call_args["searchCriteria"]["topK"] == 5
-            assert call_args["namespace"] == "test/namespace/"
+            assert call_args["namespacePath"] == "test/namespace/"
 
     def test_search_long_term_memories_with_strategy(self):
         """Test search_long_term_memories with strategy_id."""

tests/unit/test_utils.py

@@ -5,6 +5,7 @@
 import pytest
 from botocore.exceptions import ClientError
 
+from bedrock_agentcore._utils.namespace import build_namespace_params
 from bedrock_agentcore._utils.polling import wait_until, wait_until_deleted
 
 
@@ -112,3 +113,29 @@ def test_timeout(self, _mock_time, _mock_sleep):
         poll_fn = Mock(return_value={"status": "DELETING"})
         with pytest.raises(TimeoutError):
             wait_until_deleted(poll_fn)
+
+
+class TestBuildNamespaceParams:
+    """Tests for build_namespace_params utility."""
+
+    def test_namespace_only(self):
+        assert build_namespace_params(namespace="/actor/Jane/") == {"namespace": "/actor/Jane/"}
+
+    def test_namespace_path_only(self):
+        assert build_namespace_params(namespace_path="/org/team/") == {"namespacePath": "/org/team/"}
+
+    def test_both_raises(self):
+        with pytest.raises(ValueError, match="mutually exclusive"):
+            build_namespace_params(namespace="/a/", namespace_path="/b/")
+
+    def test_neither_raises(self):
+        with pytest.raises(ValueError, match="At least one"):
+            build_namespace_params()
+
+    def test_wildcard_in_namespace_raises(self):
+        with pytest.raises(ValueError, match="[Ww]ildcard"):
+            build_namespace_params(namespace="/actor/*/")
+
+    def test_wildcard_in_namespace_path_raises(self):
+        with pytest.raises(ValueError, match="[Ww]ildcard"):
+            build_namespace_params(namespace_path="/org/*/team/")

tests_integ/memory/test_memory_client.py

@@ -371,11 +371,11 @@ def test_retrieve_summary_memories(self):
         assert len(results) > 0, "Expected summary memories in /summaries/ namespace"
 
     @pytest.mark.order(14)
-    # retrieve_memories with a prefix namespace matches broader results
+    # retrieve_memories with a path prefix matches all descendants under /facts/
     def test_retrieve_memories_prefix_namespace(self):
         results = self.client.retrieve_memories(
             memory_id=self.prepopulated_memory_id,
-            namespace="/facts/",
+            namespace_path="/facts/",
             query="developer preferences",
         )
         assert len(results) > 0, "Expected prefix namespace to match"