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train.py

@@ -21,8 +21,8 @@ print(f"✅ Dataset loaded: {len(dataset)} examples")
 
 print("🔀 Creating train/eval split...")
 dataset_split = dataset.train_test_split(test_size=0.05, seed=42)
-train_dataset = dataset_split["train"]
-eval_dataset = dataset_split["test"]
+train_dataset = dataset_split["train"].select_columns(["messages"])
+eval_dataset = dataset_split["test"].select_columns(["messages"])
 
 config = SFTConfig(
     output_dir="qwen3-0.6b-codeforces-cots",
@@ -39,7 +39,7 @@ config = SFTConfig(
     save_total_limit=2,
     eval_strategy="steps",
     eval_steps=100,
-    warmup_ratio=0.1,
+    warmup_steps=100,
     lr_scheduler_type="cosine",
     report_to="trackio",
     project="qwen3_codeforces",