feat: Add bounded Scenario result hierarchy projections (#3145)

pyrit/backend/routes/scenarios.py

@@ -26,7 +26,14 @@
     get_scenario_run_service,
 )
 from pyrit.backend.services.scenario_service import get_scenario_service
-from pyrit.models import ScenarioQueueSnapshot, ScenarioResult, ScenarioRunProgress, ScenarioRunState
+from pyrit.models import (
+    ScenarioHierarchyNode,
+    ScenarioHierarchyProjection,
+    ScenarioQueueSnapshot,
+    ScenarioResult,
+    ScenarioRunProgress,
+    ScenarioRunState,
+)
 from pyrit.models.catalog import (
     RegisteredScenario,
     RunScenarioRequest,
@@ -335,6 +342,69 @@ async def get_scenario_run_progress(  # pyrit-async-suffix-exempt
     return progress
 
 
+@router.get(
+    "/runs/{scenario_result_id}/hierarchy",
+    response_model=ScenarioHierarchyProjection,
+    responses={
+        404: {"model": ProblemDetail, "description": "Run not found"},
+    },
+)
+async def get_scenario_run_hierarchy(  # pyrit-async-suffix-exempt
+    *,
+    scenario_result_id: IdentifierStr,
+    max_nodes: int = Query(1000, ge=1, le=5000, description="Maximum nodes to assemble in the hierarchy tree"),
+) -> ScenarioHierarchyProjection:
+    """
+    Get the bounded result hierarchy projection for a scenario run.
+
+    Returns:
+        ScenarioHierarchyProjection: Bounded hierarchy projection connecting orchestration parents,
+        target-facing children, and generic read-only conversations.
+    """
+    service = get_scenario_run_service()
+    hierarchy = await service.get_run_hierarchy_async(
+        scenario_result_id=scenario_result_id,
+        max_nodes=max_nodes,
+    )
+    if hierarchy is None:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Scenario run '{scenario_result_id}' not found",
+        )
+    return hierarchy
+
+
+@router.get(
+    "/runs/{scenario_result_id}/hierarchy/nodes/{attack_result_id}",
+    response_model=ScenarioHierarchyNode,
+    responses={
+        404: {"model": ProblemDetail, "description": "Node or run not found"},
+    },
+)
+async def get_scenario_run_hierarchy_node(  # pyrit-async-suffix-exempt
+    *,
+    scenario_result_id: IdentifierStr,
+    attack_result_id: IdentifierStr,
+) -> ScenarioHierarchyNode:
+    """
+    Get single-node hierarchy details and generic conversation projections without full-run hydration.
+
+    Returns:
+        ScenarioHierarchyNode: The target node with resolved immediate children and conversations.
+    """
+    service = get_scenario_run_service()
+    node = await service.get_run_hierarchy_node_async(
+        scenario_result_id=scenario_result_id,
+        attack_result_id=attack_result_id,
+    )
+    if node is None:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail=f"Hierarchy node '{attack_result_id}' not found in scenario run '{scenario_result_id}'",
+        )
+    return node
+
+
 @router.post(
     "/runs/{scenario_result_id}/cancel",
     response_model=ScenarioRunSummary,