Add description/columns to ModelNodeArgs so that plugins ingest description/columns to manifest.json

.changes/unreleased/Under the Hood-20250429-131931.yaml

@@ -0,0 +1,6 @@
+kind: Under the Hood
+body: Add description/columns to external ExternalNode so that plugins ingest description/columns
+time: 2025-04-29T13:19:31.737607807+09:00
+custom:
+    Author: toukoudo
+    Issue: "11527"

core/dbt/contracts/graph/node_args.py

@@ -1,8 +1,9 @@
 from dataclasses import dataclass, field
 from datetime import datetime, timezone
-from typing import List, Optional
+from typing import Dict, List, Optional
 
 from dbt.artifacts.resources import NodeVersion
+from dbt.artifacts.resources.v1.components import ColumnInfo
 from dbt.node_types import AccessType, NodeType
 
 
@@ -17,6 +18,8 @@ class ModelNodeArgs:
     version: Optional[NodeVersion] = None
     latest_version: Optional[NodeVersion] = None
     deprecation_date: Optional[datetime] = None
+    description: str = ""
+    columns: Dict[str, ColumnInfo] = field(default_factory=dict)
     access: Optional[str] = AccessType.Protected.value
     generated_at: datetime = field(
         default_factory=lambda: datetime.now(timezone.utc).replace(tzinfo=None)

core/dbt/contracts/graph/nodes.py

@@ -507,13 +507,15 @@ def from_args(cls, args: ModelNodeArgs) -> "ModelNode":
             schema=args.schema,
             alias=args.identifier,
             deprecation_date=args.deprecation_date,
+            description=args.description,
             checksum=FileHash.from_contents(f"{unique_id},{args.generated_at}"),
             access=AccessType(args.access),
             original_file_path="",
             path="",
             unrendered_config=unrendered_config,
             depends_on=DependsOn(nodes=args.depends_on_nodes),
             config=ModelConfig(enabled=args.enabled),
+            columns=args.columns,
         )
 
     @property