diff --git a/llama_stack/apis/post_training/post_training.py b/llama_stack/apis/post_training/post_training.py
index ed15c6de4..8324be5f6 100644
--- a/llama_stack/apis/post_training/post_training.py
+++ b/llama_stack/apis/post_training/post_training.py
@@ -17,13 +17,6 @@ from llama_stack.apis.common.training_types import Checkpoint
 from llama_stack.schema_utils import json_schema_type, register_schema, webmethod
 
 
-@json_schema_type
-class OptimizerType(Enum):
-    adam = "adam"
-    adamw = "adamw"
-    sgd = "sgd"
-
-
 @json_schema_type
 class DatasetFormat(Enum):
     instruct = "instruct"
@@ -33,50 +26,39 @@ class DatasetFormat(Enum):
 @json_schema_type
 class DataConfig(BaseModel):
     dataset_id: str
-    batch_size: int
-    shuffle: bool
-    data_format: DatasetFormat
+    batch_size: Optional[int] = 1
+    shuffle: Optional[bool] = True
+    data_format: Optional[DatasetFormat] = DatasetFormat.instruct
     validation_dataset_id: Optional[str] = None
-    packed: Optional[bool] = False
     train_on_input: Optional[bool] = False
 
 
 @json_schema_type
 class OptimizerConfig(BaseModel):
-    optimizer_type: OptimizerType
-    lr: float
-    weight_decay: float
-    num_warmup_steps: int
-
-
-@json_schema_type
-class EfficiencyConfig(BaseModel):
-    enable_activation_checkpointing: Optional[bool] = False
-    enable_activation_offloading: Optional[bool] = False
-    memory_efficient_fsdp_wrap: Optional[bool] = False
-    fsdp_cpu_offload: Optional[bool] = False
+    lr: Optional[float] = 2e-5
+    weight_decay: Optional[float] = 0.1
+    num_warmup_steps: Optional[int] = 20
 
 
 @json_schema_type
 class TrainingConfig(BaseModel):
-    n_epochs: int
-    max_steps_per_epoch: int
-    gradient_accumulation_steps: int
-    max_validation_steps: int
     data_config: DataConfig
     optimizer_config: OptimizerConfig
-    efficiency_config: Optional[EfficiencyConfig] = None
+    n_epochs: Optional[int] = 1
+    max_steps_per_epoch: Optional[int] = None
+    gradient_accumulation_steps: Optional[int] = 1
+    max_validation_steps: Optional[int] = None
     dtype: Optional[str] = "bf16"
 
 
 @json_schema_type
 class LoraFinetuningConfig(BaseModel):
     type: Literal["LoRA"] = "LoRA"
-    lora_attn_modules: List[str]
-    apply_lora_to_mlp: bool
-    apply_lora_to_output: bool
-    rank: int
-    alpha: int
+    lora_attn_modules: Optional[List[str]] = ["q_proj", "v_proj", "output_proj"]
+    apply_lora_to_mlp: Optional[bool] = True
+    apply_lora_to_output: Optional[bool] = False
+    rank: Optional[int] = 8
+    alpha: Optional[int] = 16
     use_dora: Optional[bool] = False
     quantize_base: Optional[bool] = False