Resolve registry asset/effect references when running recipes

SOURCE nodes with config.asset now get content_hash from registry.
EFFECT nodes with config.effect now get effect_hash from registry.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/routers/recipes.py

@@ -273,17 +273,36 @@ async def run_recipe(
             dag_copy = json.loads(json.dumps(recipe_dag))  # Deep copy
             nodes = dag_copy.get("nodes", {})
 
+            # Get registry for resolving asset/effect references
+            registry = recipe.get("registry", {})
+            assets = registry.get("assets", {})
+            effects = registry.get("effects", {})
+
             # Convert nodes from list to dict if needed, and transform to artdag format
             if isinstance(nodes, list):
                 nodes_dict = {}
                 for node in nodes:
                     node_id = node.get("id")
                     if node_id:
+                        config = node.get("config", {})
+
+                        # Resolve asset references for SOURCE nodes
+                        if node.get("type") == "SOURCE" and "asset" in config:
+                            asset_name = config["asset"]
+                            if asset_name in assets:
+                                config["content_hash"] = assets[asset_name].get("hash")
+
+                        # Resolve effect references for EFFECT nodes
+                        if node.get("type") == "EFFECT" and "effect" in config:
+                            effect_name = config["effect"]
+                            if effect_name in effects:
+                                config["effect_hash"] = effects[effect_name].get("hash")
+
                         # Transform to artdag format: type->node_type, id->node_id
                         transformed = {
                             "node_id": node_id,
                             "node_type": node.get("type", "EFFECT"),
-                            "config": node.get("config", {}),
+                            "config": config,
                             "inputs": node.get("inputs", []),
                             "name": node.get("name"),
                         }
@@ -291,7 +310,7 @@ async def run_recipe(
                 nodes = nodes_dict
                 dag_copy["nodes"] = nodes
 
-            # Map input names to content hashes
+            # Map user-provided input names to content hashes (for variable inputs)
             for input_name, content_hash in req.inputs.items():
                 if input_name in nodes:
                     node = nodes[input_name]