Make checkpoint saving folder clear in the config (meta-pytorch#444)

Author: DNXie

apps/grpo/qwen3_1_7b.yaml

@@ -74,8 +74,9 @@ trainer:
     disable_loss_parallel: true
   checkpoint:
     enable: true
-    initial_load_path: hf://${model}
-    initial_load_in_hf: true
+    folder: ./checkpoint              # The folder to save checkpoints to.
+    initial_load_path: hf://${model}  # The path to load the initial checkpoint from. Ignored if `folder` exists.
+    initial_load_in_hf: true          # If true, interpret initial_load_path as a HuggingFace model repo
     last_save_in_hf: true
     interval: 500
     async_mode: "disabled"

apps/grpo/qwen3_32b.yaml

@@ -77,8 +77,9 @@ trainer:
     disable_loss_parallel: true
   checkpoint:
     enable: true
-    initial_load_path: hf://${model}
-    initial_load_in_hf: true
+    folder: ./checkpoint              # The folder to save checkpoints to.
+    initial_load_path: hf://${model}  # The path to load the initial checkpoint from. Ignored if `folder` exists.
+    initial_load_in_hf: true          # If true, interpret initial_load_path as a HuggingFace model repo
     last_save_in_hf: true
     interval: 500
     async_mode: "disabled"

apps/grpo/qwen3_8b.yaml

@@ -70,8 +70,9 @@ trainer:
     disable_loss_parallel: true
   checkpoint:
     enable: true
-    initial_load_path: hf://${model}
-    initial_load_in_hf: true
+    folder: ./checkpoint              # The folder to save checkpoints to.
+    initial_load_path: hf://${model}  # The path to load the initial checkpoint from. Ignored if `folder` exists.
+    initial_load_in_hf: true          # If true, interpret initial_load_path as a HuggingFace model repo
     last_save_in_hf: true
     interval: 500
     async_mode: "disabled"

apps/sft/llama3_8b.yaml

@@ -45,8 +45,9 @@ parallelism:
 
 checkpoint:
   enable: true
-  initial_load_path: hf://${model_name}
-  initial_load_in_hf: true
+  folder: ./checkpoint              # The folder to save checkpoints to.
+  initial_load_path: hf://${model}  # The path to load the initial checkpoint from. Ignored if `folder` exists.
+  initial_load_in_hf: true          # If true, interpret initial_load_path as a HuggingFace model repo
   last_save_in_hf: true
   interval: 500
   async_mode: "disabled"

apps/sft/qwen3_8b.yaml

@@ -44,8 +44,9 @@ parallelism:
 
 checkpoint:
   enable: true
-  initial_load_path: hf://${model_name}
-  initial_load_in_hf: true
+  folder: ./checkpoint              # The folder to save checkpoints to.
+  initial_load_path: hf://${model}  # The path to load the initial checkpoint from. Ignored if `folder` exists.
+  initial_load_in_hf: true          # If true, interpret initial_load_path as a HuggingFace model repo
   last_save_in_hf: true
   interval: 500
   async_mode: "disabled"