Python: Add a HarnessAgent with available features and sample (#6041)

* Add a HarnessAgent with available features and sample

* Fix formatting

* Address PR comments and fix mypy error

* Add web search support to HarnessAgent

* Fix build warning

* Apply suggestions from code review

Co-authored-by: Eduard van Valkenburg <eavanvalkenburg@users.noreply.github.com>

* Address PR comments

* Address PR comments

* Address further PR comments.

* Fix markdown broken link

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Co-authored-by: Eduard van Valkenburg <eavanvalkenburg@users.noreply.github.com>

python/packages/foundry_hosting/agent_framework_foundry_hosting/_responses.py

@@ -10,10 +10,9 @@ import os
 import tempfile
 import threading
 from collections.abc import AsyncIterable, AsyncIterator, Generator, Sequence
-from contextlib import suppress
+from contextlib import AbstractAsyncContextManager, AsyncExitStack, suppress
 from dataclasses import asdict, is_dataclass
 from pathlib import Path
-from contextlib import AbstractAsyncContextManager, AsyncExitStack, suppress
 from typing import Protocol, cast
 
 from agent_framework import (

python/packages/foundry_hosting/tests/test_responses.py

@@ -2923,6 +2923,8 @@ class TestCheckpointContextPathValidation:
             f"before={before} after={after}"
         )
         assert list(root.iterdir()) == [], f"Checkpoint directory created inside root for {context_field}={bad_id!r}"
+
+
 # region Agent lifecycle (lazy entry & OAuth consent surfacing)