Push intermediate checkpoints to HuggingFace Hub

config/examples/train_lora_chroma_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_flex2_24gb.yaml

@@ -26,7 +26,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_flex_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_flux_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_flux_kontext_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_flux_schnell_24gb.yaml

@@ -22,9 +22,10 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
-#       hf_private: true #whether the repo is private or public        
+#       hf_private: true #whether the repo is private or public
       datasets:
         # datasets are a folder of images. captions need to be txt files with the same name as the image
         # for instance image2.jpg and image2.txt. Only jpg, jpeg, and png are supported currently

config/examples/train_lora_omnigen2_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_sd35_large_24gb.yaml

@@ -23,7 +23,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_wan21_14b_24gb.yaml

@@ -27,7 +27,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

config/examples/train_lora_wan21_1b_24gb.yaml

@@ -22,7 +22,8 @@ config:
         save_every: 250 # save every this many steps
         max_step_saves_to_keep: 4 # how many intermittent saves to keep
         push_to_hub: false #change this to True to push your trained model to Hugging Face.
-        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in         
+        push_to_hub_every_save: false # push to HuggingFace Hub every time a checkpoint is saved (requires push_to_hub: true)
+        # You can either set up a HF_TOKEN env variable or you'll be prompted to log-in
 #       hf_repo_id: your-username/your-model-slug
 #       hf_private: true #whether the repo is private or public
       datasets:

jobs/process/BaseSDTrainProcess.py

@@ -19,8 +19,8 @@
 from torch.utils.data import DataLoader
 import torch
 import torch.backends.cuda
-from huggingface_hub import HfApi, Repository, interpreter_login
-from huggingface_hub.utils import HfFolder
+from huggingface_hub import HfApi, get_token, interpreter_login
+from huggingface_hub.utils import HfHubHTTPError
 from toolkit.memory_management import MemoryManager
 
 from toolkit.basic import value_map
@@ -482,8 +482,66 @@ def clean_up_saves(self):
         return latest_item
 
     def post_save_hook(self, save_path):
-        # override in subclass
-        pass
+        if self.save_config.push_to_hub and self.save_config.push_to_hub_every_save:
+            # Unlike the end-of-training push (which can prompt interactively via
+            # interpreter_login), intermediate pushes must not block the training
+            # loop, so we silently check for an existing token and bail out if
+            # none is found. The result is cached to avoid repeated checks.
+            if getattr(self, "_hub_push_disabled", False):
+                return
+            if "HF_TOKEN" not in os.environ and get_token() is None:
+                print_acc("No HF token available, skipping intermediate Hub pushes")
+                self._hub_push_disabled = True
+                return
+            if not os.path.exists(save_path):
+                print_acc(f"Checkpoint not found, skipping Hub push: {save_path}")
+                return
+            repo_id = self.save_config.hf_repo_id
+            api = HfApi()
+            if not getattr(self, "_hub_repo_created", False):
+                try:
+                    api.create_repo(repo_id, private=self.save_config.hf_private, exist_ok=True)
+                    self._hub_repo_created = True
+                except HfHubHTTPError as e:
+                    print_acc(f"Failed to create Hub repo '{repo_id}': {e}")
+                    print_acc(traceback.format_exc())
+                    status = getattr(e.response, "status_code", None)
+                    if status in (401, 403):
+                        print_acc("Disabling intermediate Hub pushes for this run (auth/permission error)")
+                        self._hub_push_disabled = True
+                    return
+                except Exception as e:
+                    print_acc(f"Failed to create Hub repo '{repo_id}': {e}")
+                    print_acc(traceback.format_exc())
+                    return
+            try:
+                # Upload only the new checkpoint, not the entire save_root.
+                # The full folder (with README) is pushed at end of training.
+                if os.path.isdir(save_path):
+                    api.upload_folder(
+                        repo_id=repo_id,
+                        folder_path=save_path,
+                        path_in_repo=os.path.basename(save_path),
+                        repo_type="model",
+                    )
+                else:
+                    api.upload_file(
+                        repo_id=repo_id,
+                        path_or_fileobj=save_path,
+                        path_in_repo=os.path.basename(save_path),
+                        repo_type="model",
+                    )
+                print_acc(f"Pushed checkpoint to Hub: {os.path.basename(save_path)}")
+            except HfHubHTTPError as e:
+                print_acc(f"Failed to upload checkpoint to Hub: {e}")
+                print_acc(traceback.format_exc())
+                status = getattr(e.response, "status_code", None)
+                if status in (401, 403):
+                    print_acc("Disabling intermediate Hub pushes for this run (auth/permission error)")
+                    self._hub_push_disabled = True
+            except Exception as e:
+                print_acc(f"Failed to upload checkpoint to Hub: {e}")
+                print_acc(traceback.format_exc())
 
     def done_hook(self):
         pass
@@ -665,6 +723,9 @@ def save(self, step=None):
                     get_torch_dtype(self.save_config.dtype)
                 )
 
+        # Capture checkpoint path; file_path is reassigned below for SNR/optimizer saves
+        checkpoint_path = file_path
+
         # save learnable params as json if we have thim
         if self.snr_gos:
             json_data = {
@@ -695,7 +756,7 @@ def save(self, step=None):
                 print_acc("Could not save optimizer")
 
         self.clean_up_saves()
-        self.post_save_hook(file_path)
+        self.post_save_hook(checkpoint_path)
 
         if self.ema is not None:
             self.ema.train()
@@ -2404,10 +2465,17 @@ def run(self):
             if self.save_config.push_to_hub:
                 if("HF_TOKEN" not in os.environ):
                     interpreter_login(new_session=False, write_permission=True)
-                self.push_to_hub(
-                    repo_id=self.save_config.hf_repo_id,
-                    private=self.save_config.hf_private
-                )
+                try:
+                    self.push_to_hub(
+                        repo_id=self.save_config.hf_repo_id,
+                        private=self.save_config.hf_private
+                    )
+                except Exception as e:
+                    print_acc("=" * 60)
+                    print_acc(f"Failed to push final model to Hub: {e}")
+                    print_acc(traceback.format_exc())
+                    print_acc(f"Model saved locally at: {self.save_root}")
+                    print_acc("=" * 60)
         del (
             self.sd,
             unet,

toolkit/config_modules.py

@@ -27,8 +27,13 @@ def __init__(self, **kwargs):
         if self.save_format not in ['safetensors', 'diffusers']:
             raise ValueError(f"save_format must be safetensors or diffusers, got {self.save_format}")
         self.push_to_hub: bool = kwargs.get("push_to_hub", False)
+        self.push_to_hub_every_save: bool = kwargs.get("push_to_hub_every_save", False)
         self.hf_repo_id: Optional[str] = kwargs.get("hf_repo_id", None)
-        self.hf_private: Optional[str] = kwargs.get("hf_private", False)
+        self.hf_private: bool = kwargs.get("hf_private", False)
+        if self.push_to_hub and not self.hf_repo_id:
+            raise ValueError("hf_repo_id must be provided when push_to_hub is enabled")
+        if self.push_to_hub_every_save and not self.push_to_hub:
+            raise ValueError("push_to_hub must be enabled when push_to_hub_every_save is True")
 
 class LoggingConfig:
     def __init__(self, **kwargs):

ui/src/app/jobs/new/jobConfig.ts

@@ -58,6 +58,7 @@ export const defaultJobConfig: JobConfig = {
           max_step_saves_to_keep: 4,
           save_format: 'diffusers',
           push_to_hub: false,
+          push_to_hub_every_save: false,
         },
         datasets: [defaultDatasetConfig],
         train: {
@@ -192,6 +193,10 @@ export const migrateJobConfig = (jobConfig: JobConfig): JobConfig => {
     delete jobConfig.config.process[0].model.auto_memory;
   }
 
+  if (jobConfig.config.process[0]?.save && !('push_to_hub_every_save' in jobConfig.config.process[0].save)) {
+    jobConfig.config.process[0].save.push_to_hub_every_save = false;
+  }
+
   if (!('logging' in jobConfig.config.process[0])) {
     //@ts-ignore
     jobConfig.config.process[0].logging = {

ui/src/types.ts

@@ -78,6 +78,7 @@ export interface SaveConfig {
   max_step_saves_to_keep: number;
   save_format: string;
   push_to_hub: boolean;
+  push_to_hub_every_save: boolean;
 }
 
 export interface DatasetConfig {