refactor: align react_agent conftest with standard load_golden pattern

agents/langgraph/react_agent/tests/behavioral/conftest.py

@@ -13,6 +13,7 @@
 import httpx
 import pytest
 import yaml
+from harness.fixtures import load_golden as _load_golden_from
 from harness.runner import TaskConfig, TaskResult, run_task
 
 try:
@@ -39,6 +40,14 @@ def _find_repo_root() -> Path:
     )
 
 
+FIXTURES_DIR = Path(__file__).parent / "fixtures"
+
+
+def load_golden(category: str | None = None) -> list[dict[str, Any]]:
+    """Load golden queries from the fixtures directory, optionally filtering by category."""
+    return _load_golden_from(FIXTURES_DIR, category)
+
+
 @pytest.fixture
 def agent_url() -> str:
     """React agent URL from REACT_AGENT_URL env var or default localhost:8000."""

agents/langgraph/react_agent/tests/behavioral/test_tool_usage.py

@@ -16,11 +16,10 @@
 from __future__ import annotations
 
 import warnings
-from pathlib import Path
 from typing import Any
 
 import pytest
-from harness.fixtures import load_golden as _load_golden_from
+from conftest import load_golden
 from harness.scorers.tool_sequence import (
     score_hallucinated_tools,
     score_tool_call_validity,
@@ -29,17 +28,10 @@
 
 pytestmark = pytest.mark.langgraph_react
 
-FIXTURES_DIR = Path(__file__).parent / "fixtures"
-
-
-def _load_golden(category: str | None = None) -> list[dict[str, Any]]:
-    """Load golden queries, optionally filtering by category."""
-    return _load_golden_from(FIXTURES_DIR, category)
-
 
 def _factual_queries() -> list[dict[str, Any]]:
     """Return golden queries that should trigger tool calls."""
-    return [q for q in _load_golden() if q.get("expected_tools")]
+    return [q for q in load_golden() if q.get("expected_tools")]
 
 
 @pytest.mark.parametrize(