Python: [BREAKING] consolidate workflow run APIs

python/packages/core/agent_framework/_workflows/_agent.py

@@ -60,10 +60,13 @@ def from_dict(cls, payload: dict[str, Any]) -> "WorkflowAgent.RequestInfoFunctio
 
         @classmethod
         def from_json(cls, raw: str) -> "WorkflowAgent.RequestInfoFunctionArgs":
-            data = json.loads(raw)
-            if not isinstance(data, dict):
+            try:
+                parsed: Any = json.loads(raw)
+            except json.JSONDecodeError as exc:
+                raise ValueError(f"RequestInfoFunctionArgs JSON payload is malformed: {exc}") from exc
+            if not isinstance(parsed, dict):
                 raise ValueError("RequestInfoFunctionArgs JSON payload must decode to a mapping")
-            return cls.from_dict(data)
+            return cls.from_dict(cast(dict[str, Any], parsed))
 
     def __init__(
         self,

python/packages/core/agent_framework/_workflows/_handoff.py

@@ -336,10 +336,15 @@ async def handle_agent_response(
 
         if await self._check_termination():
             logger.info("Handoff workflow termination condition met. Ending conversation.")
-            await ctx.yield_output(list(conversation))
+            # Clean the output conversation for display
+            cleaned_output = clean_conversation_for_handoff(conversation)
+            await ctx.yield_output(cleaned_output)
             return
 
-        await ctx.send_message(list(conversation), target_id=self._input_gateway_id)
+        # Clean conversation before sending to gateway for user input request
+        # This removes tool messages that shouldn't be shown to users
+        cleaned_for_display = clean_conversation_for_handoff(conversation)
+        await ctx.send_message(cleaned_for_display, target_id=self._input_gateway_id)
 
     @handler
     async def handle_user_input(
@@ -1274,12 +1279,12 @@ def build(self) -> Workflow:
                         updated_executor, tool_targets = self._prepare_agent_with_handoffs(executor, targets_map)
                         self._executors[source_exec_id] = updated_executor
                         handoff_tool_targets.update(tool_targets)
-        else:
-            # Default behavior: only coordinator gets handoff tools to all specialists
-            if isinstance(starting_executor, AgentExecutor) and specialists:
-                starting_executor, tool_targets = self._prepare_agent_with_handoffs(starting_executor, specialists)
-                self._executors[self._starting_agent_id] = starting_executor
-                handoff_tool_targets.update(tool_targets)  # Update references after potential agent modifications
+            else:
+                # Default behavior: only coordinator gets handoff tools to all specialists
+                if isinstance(starting_executor, AgentExecutor) and specialists:
+                    starting_executor, tool_targets = self._prepare_agent_with_handoffs(starting_executor, specialists)
+                    self._executors[self._starting_agent_id] = starting_executor
+                    handoff_tool_targets.update(tool_targets)  # Update references after potential agent modifications
         starting_executor = self._executors[self._starting_agent_id]
         specialists = {
             exec_id: executor for exec_id, executor in self._executors.items() if exec_id != self._starting_agent_id

python/packages/core/agent_framework/_workflows/_magentic.py

@@ -2442,16 +2442,6 @@ async def _validate_checkpoint_participants(
             f"Missing names: {missing}; unexpected names: {unexpected}."
         )
 
-    async def run_stream_from_checkpoint(
-        self,
-        checkpoint_id: str,
-        checkpoint_storage: CheckpointStorage | None = None,
-    ) -> AsyncIterable[WorkflowEvent]:
-        """Resume orchestration from a checkpoint and stream resulting events."""
-        await self._validate_checkpoint_participants(checkpoint_id, checkpoint_storage)
-        async for event in self._workflow.run_stream_from_checkpoint(checkpoint_id, checkpoint_storage):
-            yield event
-
     async def run_with_string(self, task_text: str) -> WorkflowRunResult:
         """Run the workflow with a task string and return all events.
 
@@ -2495,32 +2485,6 @@ async def run(self, message: Any | None = None) -> WorkflowRunResult:
             events.append(event)
         return WorkflowRunResult(events)
 
-    async def run_from_checkpoint(
-        self,
-        checkpoint_id: str,
-        checkpoint_storage: CheckpointStorage | None = None,
-    ) -> WorkflowRunResult:
-        """Resume orchestration from a checkpoint and collect all resulting events."""
-        events: list[WorkflowEvent] = []
-        async for event in self.run_stream_from_checkpoint(checkpoint_id, checkpoint_storage):
-            events.append(event)
-        return WorkflowRunResult(events)
-
-    async def send_responses_streaming(self, responses: dict[str, Any]) -> AsyncIterable[WorkflowEvent]:
-        """Forward responses to pending requests and stream resulting events.
-
-        This delegates to the underlying Workflow implementation.
-        """
-        async for event in self._workflow.send_responses_streaming(responses):
-            yield event
-
-    async def send_responses(self, responses: dict[str, Any]) -> WorkflowRunResult:
-        """Forward responses to pending requests and return all resulting events.
-
-        This delegates to the underlying Workflow implementation.
-        """
-        return await self._workflow.send_responses(responses)
-
     def __getattr__(self, name: str) -> Any:
         """Delegate unknown attributes to the underlying workflow."""
         return getattr(self._workflow, name)

python/packages/core/agent_framework/_workflows/_orchestrator_helpers.py

@@ -63,11 +63,12 @@ def clean_conversation_for_handoff(conversation: list[ChatMessage]) -> list[Chat
 
         # Has tool content - only keep if it also has text
         if msg.text and msg.text.strip():
-            # Create fresh text-only message
+            # Create fresh text-only message while preserving additional_properties
             msg_copy = ChatMessage(
                 role=msg.role,
                 text=msg.text,
                 author_name=msg.author_name,
+                additional_properties=dict(msg.additional_properties) if msg.additional_properties else None,
             )
             cleaned.append(msg_copy)
 

python/packages/core/agent_framework/_workflows/_runner_context.py

@@ -171,6 +171,18 @@ def has_checkpointing(self) -> bool:
         """
         ...
 
+    def set_runtime_checkpoint_storage(self, storage: CheckpointStorage) -> None:
+        """Set runtime checkpoint storage to override build-time configuration.
+
+        Args:
+            storage: The checkpoint storage to use for this run.
+        """
+        ...
+
+    def clear_runtime_checkpoint_storage(self) -> None:
+        """Clear runtime checkpoint storage override."""
+        ...
+
     # Checkpointing APIs (optional, enabled by storage)
     def set_workflow_id(self, workflow_id: str) -> None:
         """Set the workflow ID for the context."""
@@ -279,6 +291,7 @@ def __init__(self, checkpoint_storage: CheckpointStorage | None = None):
 
         # Checkpointing configuration/state
         self._checkpoint_storage = checkpoint_storage
+        self._runtime_checkpoint_storage: CheckpointStorage | None = None
         self._workflow_id: str | None = None
 
         # Streaming flag - set by workflow's run_stream() vs run()
@@ -329,16 +342,37 @@ async def next_event(self) -> WorkflowEvent:
 
     # region Checkpointing
 
+    def _get_effective_checkpoint_storage(self) -> CheckpointStorage | None:
+        """Get the effective checkpoint storage (runtime override or build-time)."""
+        return self._runtime_checkpoint_storage or self._checkpoint_storage
+
+    def set_runtime_checkpoint_storage(self, storage: CheckpointStorage) -> None:
+        """Set runtime checkpoint storage to override build-time configuration.
+
+        Args:
+            storage: The checkpoint storage to use for this run.
+        """
+        self._runtime_checkpoint_storage = storage
+
+    def clear_runtime_checkpoint_storage(self) -> None:
+        """Clear runtime checkpoint storage override.
+
+        This is called automatically by workflow execution methods after a run completes,
+        ensuring runtime storage doesn't leak across runs.
+        """
+        self._runtime_checkpoint_storage = None
+
     def has_checkpointing(self) -> bool:
-        return self._checkpoint_storage is not None
+        return self._get_effective_checkpoint_storage() is not None
 
     async def create_checkpoint(
         self,
         shared_state: SharedState,
         iteration_count: int,
         metadata: dict[str, Any] | None = None,
     ) -> str:
-        if not self._checkpoint_storage:
+        storage = self._get_effective_checkpoint_storage()
+        if not storage:
             raise ValueError("Checkpoint storage not configured")
 
         self._workflow_id = self._workflow_id or str(uuid.uuid4())
@@ -352,19 +386,21 @@ async def create_checkpoint(
             iteration_count=state["iteration_count"],
             metadata=metadata or {},
         )
-        checkpoint_id = await self._checkpoint_storage.save_checkpoint(checkpoint)
+        checkpoint_id = await storage.save_checkpoint(checkpoint)
         logger.info(f"Created checkpoint {checkpoint_id} for workflow {self._workflow_id}")
         return checkpoint_id
 
     async def load_checkpoint(self, checkpoint_id: str) -> WorkflowCheckpoint | None:
-        if not self._checkpoint_storage:
+        storage = self._get_effective_checkpoint_storage()
+        if not storage:
             raise ValueError("Checkpoint storage not configured")
-        return await self._checkpoint_storage.load_checkpoint(checkpoint_id)
+        return await storage.load_checkpoint(checkpoint_id)
 
     def reset_for_new_run(self) -> None:
         """Reset the context for a new workflow run.
 
         This clears messages, events, and resets streaming flag.
+        Runtime checkpoint storage is NOT cleared here as it's managed at the workflow level.
         """
         self._messages.clear()
         # Clear any pending events (best-effort) by recreating the queue

python/packages/core/agent_framework/_workflows/_validation.py

@@ -12,10 +12,6 @@
 
 logger = logging.getLogger(__name__)
 
-# Track cycle signatures we've already reported to avoid spamming logs when workflows
-# with intentional feedback loops are constructed multiple times in the same process.
-_LOGGED_CYCLE_SIGNATURES: set[tuple[str, ...]] = set()
-
 
 # region Enums and Base Classes
 class ValidationTypeEnum(Enum):
@@ -168,7 +164,6 @@ def validate_workflow(
         self._validate_graph_connectivity(start_executor_id)
         self._validate_self_loops()
         self._validate_dead_ends()
-        self._validate_cycles()
 
     def _validate_handler_output_annotations(self) -> None:
         """Validate that each handler's ctx parameter is annotated with WorkflowContext[T].
@@ -394,96 +389,6 @@ def _validate_dead_ends(self) -> None:
                 f"Verify these are intended as final nodes in the workflow."
             )
 
-    def _validate_cycles(self) -> None:
-        """Detect cycles in the workflow graph.
-
-        Cycles might be intentional for iterative processing but should be flagged
-        for review to ensure proper termination conditions exist. We surface each
-        distinct cycle group only once per process to avoid noisy, repeated warnings
-        when rebuilding the same workflow.
-        """
-        # Build adjacency list (ensure every executor appears even if it has no outgoing edges)
-        graph: dict[str, list[str]] = defaultdict(list)
-        for edge in self._edges:
-            graph[edge.source_id].append(edge.target_id)
-            graph.setdefault(edge.target_id, [])
-        for executor_id in self._executors:
-            graph.setdefault(executor_id, [])
-
-        # Tarjan's algorithm to locate strongly-connected components that form cycles
-        index: dict[str, int] = {}
-        lowlink: dict[str, int] = {}
-        on_stack: set[str] = set()
-        stack: list[str] = []
-        current_index = 0
-        cycle_components: list[list[str]] = []
-
-        def strongconnect(node: str) -> None:
-            nonlocal current_index
-
-            index[node] = current_index
-            lowlink[node] = current_index
-            current_index += 1
-            stack.append(node)
-            on_stack.add(node)
-
-            for neighbor in graph[node]:
-                if neighbor not in index:
-                    strongconnect(neighbor)
-                    lowlink[node] = min(lowlink[node], lowlink[neighbor])
-                elif neighbor in on_stack:
-                    lowlink[node] = min(lowlink[node], index[neighbor])
-
-            if lowlink[node] == index[node]:
-                component: list[str] = []
-                while True:
-                    member = stack.pop()
-                    on_stack.discard(member)
-                    component.append(member)
-                    if member == node:
-                        break
-
-                # A strongly connected component represents a cycle if it has more than one
-                # node or if a single node references itself directly.
-                if len(component) > 1 or any(member in graph[member] for member in component):
-                    cycle_components.append(component)
-
-        for executor_id in graph:
-            if executor_id not in index:
-                strongconnect(executor_id)
-
-        if not cycle_components:
-            return
-
-        unseen_components: list[list[str]] = []
-        for component in cycle_components:
-            signature = tuple(sorted(component))
-            if signature in _LOGGED_CYCLE_SIGNATURES:
-                continue
-            _LOGGED_CYCLE_SIGNATURES.add(signature)
-            unseen_components.append(component)
-
-        if not unseen_components:
-            # All cycles already reported in this process; keep noise low but retain traceability.
-            logger.debug(
-                "Cycle detected in workflow graph but previously reported. Components: %s",
-                [sorted(component) for component in cycle_components],
-            )
-            return
-
-        def _format_cycle(component: list[str]) -> str:
-            if not component:
-                return ""
-            ordered = list(component)
-            ordered.append(component[0])
-            return " -> ".join(ordered)
-
-        formatted_cycles = ", ".join(_format_cycle(component) for component in unseen_components)
-        logger.warning(
-            "Cycle detected in the workflow graph involving: %s. Ensure termination or iteration limits exist.",
-            formatted_cycles,
-        )
-
     # endregion