Fix: use config name when loading multi-config dataset

deduplicate_clients.py

@@ -142,8 +142,10 @@ Examples:
     parser.add_argument("-o", "--output", help="Output file path (default: stdout)")
     parser.add_argument("--source-repo", default="evalstate/mcp-clients",
                         help="Source repository ID (default: evalstate/mcp-clients)")
-    parser.add_argument("--source-split", default="raw",
-                        help="Source split name (default: raw)")
+    parser.add_argument("--source-config", default="raw",
+                        help="Source config name (default: raw)")
+    parser.add_argument("--source-split", default=None,
+                        help="Source split name (optional, defaults to config name)")
     parser.add_argument("--target-repo", default="evalstate/mcp-clients",
                         help="Target repository ID (default: evalstate/mcp-clients)")
     parser.add_argument("--target-split", default="deduplicated",
@@ -156,10 +158,13 @@ Examples:
                         help="Create/push to a private repository")
     args = parser.parse_args()
 
-    print(f"[{datetime.now().isoformat()}] Loading dataset from {args.source_repo} ({args.source_split} split)...", file=sys.stderr)
+    # Use config name as split if not specified
+    source_split = args.source_split or args.source_config
 
-    # Load the source dataset from the specified split
-    ds = load_dataset(args.source_repo, split=args.source_split)
+    print(f"[{datetime.now().isoformat()}] Loading dataset from {args.source_repo} (config: {args.source_config}, split: {source_split})...", file=sys.stderr)
+
+    # Load the source dataset using config name (required for multi-config datasets)
+    ds = load_dataset(args.source_repo, args.source_config, split=source_split)
 
     print(f"[{datetime.now().isoformat()}] Loaded {len(ds):,} client records", file=sys.stderr)