Merge branch seed configs in scene pair output

node_scene.py

@@ -475,6 +475,13 @@ def _merge_seed_config(seed_config: Any, axes: tuple[str, ...], seed: int) -> st
     return _dump(config)
 
 
+def _combined_seed_config(*seed_configs: Any) -> str:
+    combined: dict[str, Any] = {}
+    for seed_config in seed_configs:
+        combined.update(_json_dict(seed_config))
+    return _dump(combined) if combined else ""
+
+
 def _apply_layer_seed(scene: dict[str, Any], layer_name: str, seed_options: Any, branch_name: str = "") -> None:
     items = _seed_option_items(seed_options)
     if not items:
@@ -2284,7 +2291,7 @@ class SxCPScenePairOutput:
             no_black=False,
             trigger=str(soft_scene.get("trigger") or "sxcpinup_coloredpencil"),
             prepend_trigger_to_prompt=bool(soft_scene.get("prepend_trigger_to_prompt", True)),
-            seed_config=base_configs["seed_config"] or hard_configs["seed_config"],
+            seed_config=_combined_seed_config(base_configs["seed_config"], hard_configs["seed_config"]),
             options_json=options_json,
             filter_config=base_configs["filter_config"] or hard_configs["filter_config"],
             camera_config=base_configs["camera_config"],

tools/prompt_smoke.py

@@ -9172,6 +9172,14 @@ def smoke_node_scene_chain_registration() -> None:
         pair.get("scene_chain", {}).get("hardcore", {}).get("seed_trace", {}).get("hardcore.hardcore_branch", {}).get("seed") == 7799,
         "Scene branch seed options did not write hardcore branch seed trace",
     )
+    hard_seed_config = pair.get("hardcore_row", {}).get("seed_config") if isinstance(pair.get("hardcore_row"), dict) else {}
+    _expect(hard_seed_config.get("pose_seed") == 7799, "Scene Pair Output did not pass hardcore branch pose seed to generator")
+    _expect(hard_seed_config.get("role_seed") == 7799, "Scene Pair Output did not pass hardcore branch role seed to generator")
+    hard_trace_axes = pair.get("hardcore_row", {}).get("generation_trace", {}).get("seed_axes", {}) if isinstance(pair.get("hardcore_row"), dict) else {}
+    _expect(
+        hard_trace_axes.get("pose", {}).get("seed") == 7799,
+        "Scene Pair Output generation trace did not use hardcore branch pose seed",
+    )
 
 
 def smoke_node_builder_registration() -> None: