Extract index switch policy

tools/prompt_smoke.py

@@ -36,6 +36,7 @@ import formatter_input  # noqa: E402
 import hardcore_position_config  # noqa: E402
 import __init__ as sxcp_nodes  # noqa: E402
 import generation_profile_config  # noqa: E402
+import index_switch_policy  # noqa: E402
 import krea_cast  # noqa: E402
 import krea_formatter  # noqa: E402
 import location_config  # noqa: E402
@@ -2647,6 +2648,22 @@ def smoke_node_utility_registration() -> None:
 
 
 def smoke_server_route_payload_policy() -> None:
+    requested, selected, available = index_switch_policy.input_selection(
+        0,
+        "zero_based",
+        "fallback",
+        {"input_1": "first"},
+    )
+    _expect((requested, selected, available) == (1, 1, [1]), "Index switch policy zero-based selection changed")
+    _expect(
+        index_switch_policy.route_selection(65, "one_based", "wrap") == (65, 1),
+        "Index switch policy wrap routing changed",
+    )
+    _expect(
+        index_switch_policy.lazy_inputs(2, "pick_input", "one_based", "fallback", {"input_2": "second"}) == ["input_2"],
+        "Index switch policy lazy input selection changed",
+    )
+
     switch = loop_nodes.SxCPIndexSwitch()
     picked = switch.switch(
         2,