Python: [BREAKING] Standardize orchestration terminal outputs as AgentResponse (#5301)

* Fix orchestration outputs so as_agent() returns the final answer only. Align other orchestration outputs

* Fix orchestration output issues from review comments

1. Sample cleanup: Remove commented-out FoundryChatClient block and update
   prerequisites to reference OPENAI_CHAT_MODEL_ID instead of FOUNDRY_* vars.

2. Sequential approval output: Change _EndWithConversation.end_with_agent_executor_response
   from a no-op sink to yield response.agent_response. When the last participant is
   AgentApprovalExecutor (via with_request_info), _EndWithConversation is the output
   executor so the yield produces the terminal answer. When the last participant is a
   regular AgentExecutor, _EndWithConversation is not in output_executors so the yield
   is silently filtered out.

3. Forward data events through WorkflowExecutor: _process_workflow_result now also
   forwards 'data' events from sub-workflows so that emit_intermediate_data=True on
   AgentExecutor works correctly when wrapped in AgentApprovalExecutor.

4. Concurrent docstring: Update _AggregateAgentConversations docstring to say
   'deterministic participant order' instead of 'completion order'.

5. Add test_concurrent_intermediate_outputs_emits_data_events verifying that
   ConcurrentBuilder(intermediate_outputs=True) emits per-participant data events
   alongside the single aggregated output event.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add tests for sequential workflow with_request_info and intermediate_outputs (#5301)

Address PR review comments 2, 3, and 5:

- Add test_sequential_request_info_last_participant_emits_output:
  Verifies that when the last participant is wrapped via with_request_info()
  (AgentApprovalExecutor), the workflow still emits a terminal output after
  approval, exercising the _EndWithConversation.end_with_agent_executor_response
  fallback path.

- Add test_sequential_request_info_with_intermediate_outputs_emits_data_events:
  Verifies that emit_intermediate_data=True works correctly through
  AgentApprovalExecutor wrapping—WorkflowExecutor._process_result already
  forwards data events from sub-workflows, so intermediate agent responses
  surface as data events in the parent workflow.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix pyright type errors from AgentResponse output refactor (#5301)

Update cast() calls in _group_chat.py and _magentic.py to use
WorkflowContext[Never, AgentResponse] instead of the old
WorkflowContext[Never, list[Message]], matching the updated method
signatures in _base_group_chat_orchestrator.py.

Fix _sequential.py _EndWithConversation.end_with_agent_executor_response
to declare WorkflowContext[Any, AgentResponse] so yield_output accepts
AgentResponse[None].

Fix _workflow_executor.py data event forwarding to handle nullable
executor_id.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix pyright reportUnknownVariableType in _agent.py (#5301)

Extract event.data into a typed local variable before the isinstance
check to avoid pyright narrowing it to AgentResponse[Unknown].

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Fix pyright reportMissingImports for orjson in file history samples (#5301)

Add pyright: ignore[reportMissingImports] to orjson imports that are
already guarded by try/except ImportError, matching the existing pattern
used elsewhere in the samples.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address review feedback for #5301: review comment fixes

* Address review feedback for #5301: review comment fixes

* Revert sequential_workflow_as_agent sample to FoundryChatClient

Reverts the mistaken switch from FoundryChatClient to OpenAIChatClient
in the sequential workflow as agent sample.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Address ultrareview feedback: emit_data_events rename + WorkflowAgent reasoning conversion

Layered on top of the prior review-feedback work in this branch.

Renames:
- AgentExecutor.emit_intermediate_data -> emit_data_events (mechanical
  rename; orchestration semantics live at the orchestration layer, not
  the general-purpose executor). Forwarded through MagenticAgentExecutor,
  AgentApprovalExecutor, and all orchestration call sites.
- HandoffAgentExecutor._check_terminate_and_yield -> _should_terminate
  (pure predicate; no longer yields anything). HandoffBuilder docstring
  rewritten to describe the new per-agent AgentResponse output contract.

WorkflowAgent reasoning-content conversion:
- Add _rewrite_text_to_reasoning(contents) and _msg_as_reasoning(msg)
  helpers; the as_agent() path now reframes text content from data events
  as text_reasoning Content blocks before merging into the AgentResponse.
- Consumers iterate msg.contents and branch on content.type — same path
  they already use for Claude thinking and OpenAI reasoning. No new
  field on Message/AgentResponse/WorkflowEvent.
- Streaming branch constructs fresh AgentResponseUpdate instances instead
  of mutating shared payloads (regression test added).
- Helper _msg_maybe_reasoning consolidates the conditional rewrite at
  three call sites in the non-streaming conversion.

Tests:
- TestWorkflowAgentReasoningHelpers + TestWorkflowAgentDataEventReasoningConversion
  add 9 new tests covering helpers, non-streaming, streaming, mixed content,
  already-reasoning passthrough, and mutation-safety regression.
- Updated test_sequential_as_agent_with_intermediate_outputs_includes_chain
  to assert text_reasoning content for intermediate agents.

* Fix pyright: widen event.data to Any to avoid partial-unknown narrowing

The streaming conversion path narrowed event.data via isinstance against
generic AgentResponse, producing AgentResponse[Unknown] and tripping
reportUnknownVariableType/reportUnknownMemberType. Binding data: Any
before the check keeps runtime behavior identical while restoring a fully
known type for downstream access.

* Clean up design

* Scope to agent output semantics only

* yield AgentResponseUpdate streaming, AgentResponse non-streaming

* Fix mypy/pyright: widen cast types at GroupChat callsites

Eight callsites in _group_chat.py still cast to WorkflowContext[Never,
AgentResponse] but the base orchestrator methods now accept the wider
WorkflowContext[Never, AgentResponse | AgentResponseUpdate] (mode-aware
yields). W_OutT is invariant, so the narrower cast is not assignable.
Magentic was widened in the same commit; this catches the GroupChat
callsites that were missed.

* Python: skip flaky Foundry / Foundry Hosting integration tests (#5553)

These two integration tests have been failing in the merge queue across
multiple unrelated PRs (5301, 5531). Both are marked `@pytest.mark.flaky`
with 3 retries, but all attempts fail back-to-back. Skipping both with a
reason pointing to #5553 so they can be fixed properly without continuing
to block unrelated merges.

- packages/foundry_hosting/tests/test_responses_int.py::TestOptions::test_temperature_and_max_tokens
- packages/foundry/tests/foundry/test_foundry_embedding_client.py::TestFoundryEmbeddingIntegration::test_text_embedding_live

Also includes a one-line uv.lock specifier-ordering normalization
auto-applied by the poe-check pre-commit hook.

---------

Co-authored-by: Copilot <copilot@github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/packages/core/tests/workflow/test_workflow_kwargs.py

@@ -232,16 +232,18 @@ async def test_groupchat_kwargs_flow_to_agents() -> None:
 
 async def test_kwargs_stored_in_state() -> None:
     """Test that function_invocation_kwargs are stored in State with the correct key."""
-    from agent_framework import Executor, WorkflowContext, handler
+    from typing_extensions import Never
+
+    from agent_framework import AgentResponse, Executor, WorkflowContext, handler
 
     stored_kwargs: dict[str, Any] | None = None
 
     class _StateInspector(Executor):
         @handler
-        async def inspect(self, msgs: list[Message], ctx: WorkflowContext[list[Message]]) -> None:
+        async def inspect(self, msgs: list[Message], ctx: WorkflowContext[Never, AgentResponse]) -> None:
             nonlocal stored_kwargs
             stored_kwargs = ctx.get_state(WORKFLOW_RUN_KWARGS_KEY)
-            await ctx.send_message(msgs)
+            await ctx.yield_output(AgentResponse(messages=msgs))
 
     inspector = _StateInspector(id="inspector")
     workflow = SequentialBuilder(participants=[inspector]).build()
@@ -256,16 +258,18 @@ async def test_kwargs_stored_in_state() -> None:
 
 async def test_empty_kwargs_stored_as_empty_dict() -> None:
     """Test that empty kwargs are stored as empty dict in State."""
-    from agent_framework import Executor, WorkflowContext, handler
+    from typing_extensions import Never
+
+    from agent_framework import AgentResponse, Executor, WorkflowContext, handler
 
     stored_kwargs: Any = "NOT_CHECKED"
 
     class _StateChecker(Executor):
         @handler
-        async def check(self, msgs: list[Message], ctx: WorkflowContext[list[Message]]) -> None:
+        async def check(self, msgs: list[Message], ctx: WorkflowContext[Never, AgentResponse]) -> None:
             nonlocal stored_kwargs
             stored_kwargs = ctx.get_state(WORKFLOW_RUN_KWARGS_KEY)
-            await ctx.send_message(msgs)
+            await ctx.yield_output(AgentResponse(messages=msgs))
 
     checker = _StateChecker(id="checker")
     workflow = SequentialBuilder(participants=[checker]).build()
@@ -695,7 +699,9 @@ async def test_subworkflow_kwargs_accessible_via_state() -> None:
     Verifies that WORKFLOW_RUN_KWARGS_KEY is populated in the subworkflow's State
     with kwargs from the parent workflow.
     """
-    from agent_framework import Executor, WorkflowContext, handler
+    from typing_extensions import Never
+
+    from agent_framework import AgentResponse, Executor, WorkflowContext, handler
     from agent_framework._workflows._workflow_executor import WorkflowExecutor
 
     captured_kwargs_from_state: list[dict[str, Any]] = []
@@ -704,10 +710,10 @@ async def test_subworkflow_kwargs_accessible_via_state() -> None:
         """Executor that reads kwargs from State for verification."""
 
         @handler
-        async def read_kwargs(self, msgs: list[Message], ctx: WorkflowContext[list[Message]]) -> None:
+        async def read_kwargs(self, msgs: list[Message], ctx: WorkflowContext[Never, AgentResponse]) -> None:
             kwargs_from_state = ctx.get_state(WORKFLOW_RUN_KWARGS_KEY)
             captured_kwargs_from_state.append(kwargs_from_state or {})
-            await ctx.send_message(msgs)
+            await ctx.yield_output(AgentResponse(messages=msgs))
 
     # Build inner workflow with State reader
     state_reader = _StateReader(id="state_reader")