diff --git a/.github/workflows/changelog.yml b/.github/workflows/changelog.yml
new file mode 100644
index 000000000..5b63e231c
--- /dev/null
+++ b/.github/workflows/changelog.yml
@@ -0,0 +1,29 @@
+name: Update Changelog
+
+on:
+  release:
+    types: [published, unpublished, created, edited, deleted, released]
+
+permissions:
+  contents: read
+
+jobs:
+  generate_changelog:
+    name: Generate changelog
+    permissions:
+      contents: write  # for peter-evans/create-pull-request to create branch
+      pull-requests: write  # for peter-evans/create-pull-request to create a PR
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: main
+          fetch-depth: 0
+      - run: |
+          python ./scripts/gen-changelog.py
+      - uses: peter-evans/create-pull-request@v7
+        with:
+          title: 'docs: update CHANGELOG.md for ${{ github.ref_name }}'
+          commit-message: 'docs: update CHANGELOG.md for ${{ github.ref_name }}'
+          branch: create-pull-request/changelog
+          signoff: true
diff --git a/README.md b/README.md
index d2adc3376..918433d51 100644
--- a/README.md
+++ b/README.md
@@ -73,26 +73,6 @@ A Llama Stack Distribution (or "distro") is a pre-configured bundle of provider
 |                   Fireworks                   |                    [llamastack/distribution-fireworks](https://hub.docker.com/repository/docker/llamastack/distribution-fireworks/general)                    |          [Guide](https://llama-stack.readthedocs.io/en/latest/distributions/self_hosted_distro/fireworks.html)           |
 | vLLM |                  [llamastack/distribution-remote-vllm](https://hub.docker.com/repository/docker/llamastack/distribution-remote-vllm/general)                  |         [Guide](https://llama-stack.readthedocs.io/en/latest/distributions/self_hosted_distro/remote-vllm.html)          |
 
-### Installation
-
-You have two ways to install this repository:
-
-* **Install as a package**:
-   You can install the repository directly from [PyPI](https://pypi.org/project/llama-stack/) by running the following command:
-   ```bash
-   pip install llama-stack
-   ```
-
-* **Install from source**:
-   If you prefer to install from the source code, we recommend using [uv](https://github.com/astral-sh/uv).
-   Then, run the following commands:
-   ```bash
-    git clone git@github.com:meta-llama/llama-stack.git
-    cd llama-stack
-
-    uv sync
-    uv pip install -e .
-   ```
 
 ### Documentation
 
diff --git a/docs/_static/llama-stack-spec.html b/docs/_static/llama-stack-spec.html
index ff53f1aed..a5ea562bf 100644
--- a/docs/_static/llama-stack-spec.html
+++ b/docs/_static/llama-stack-spec.html
@@ -10940,23 +10940,6 @@
                 ],
                 "title": "ScoreBatchResponse"
             },
-            "AlgorithmConfig": {
-                "oneOf": [
-                    {
-                        "$ref": "#/components/schemas/LoraFinetuningConfig"
-                    },
-                    {
-                        "$ref": "#/components/schemas/QATFinetuningConfig"
-                    }
-                ],
-                "discriminator": {
-                    "propertyName": "type",
-                    "mapping": {
-                        "LoRA": "#/components/schemas/LoraFinetuningConfig",
-                        "QAT": "#/components/schemas/QATFinetuningConfig"
-                    }
-                }
-            },
             "LoraFinetuningConfig": {
                 "type": "object",
                 "properties": {
@@ -11092,7 +11075,14 @@
                         "type": "string"
                     },
                     "algorithm_config": {
-                        "$ref": "#/components/schemas/AlgorithmConfig"
+                        "oneOf": [
+                            {
+                                "$ref": "#/components/schemas/LoraFinetuningConfig"
+                            },
+                            {
+                                "$ref": "#/components/schemas/QATFinetuningConfig"
+                            }
+                        ]
                     }
                 },
                 "additionalProperties": false,
diff --git a/docs/_static/llama-stack-spec.yaml b/docs/_static/llama-stack-spec.yaml
index 45546fa11..5676c91b6 100644
--- a/docs/_static/llama-stack-spec.yaml
+++ b/docs/_static/llama-stack-spec.yaml
@@ -7500,15 +7500,6 @@ components:
       required:
         - results
       title: ScoreBatchResponse
-    AlgorithmConfig:
-      oneOf:
-        - $ref: '#/components/schemas/LoraFinetuningConfig'
-        - $ref: '#/components/schemas/QATFinetuningConfig'
-      discriminator:
-        propertyName: type
-        mapping:
-          LoRA: '#/components/schemas/LoraFinetuningConfig'
-          QAT: '#/components/schemas/QATFinetuningConfig'
     LoraFinetuningConfig:
       type: object
       properties:
@@ -7592,7 +7583,9 @@ components:
         checkpoint_dir:
           type: string
         algorithm_config:
-          $ref: '#/components/schemas/AlgorithmConfig'
+          oneOf:
+            - $ref: '#/components/schemas/LoraFinetuningConfig'
+            - $ref: '#/components/schemas/QATFinetuningConfig'
       additionalProperties: false
       required:
         - job_uuid
diff --git a/llama_stack/apis/post_training/post_training.py b/llama_stack/apis/post_training/post_training.py
index 636eb7e7b..362f87a26 100644
--- a/llama_stack/apis/post_training/post_training.py
+++ b/llama_stack/apis/post_training/post_training.py
@@ -6,7 +6,7 @@
 
 from datetime import datetime
 from enum import Enum
-from typing import Any, Dict, List, Literal, Optional, Protocol, Union
+from typing import Any, Dict, List, Literal, Optional, Protocol
 
 from pydantic import BaseModel, Field
 from typing_extensions import Annotated
@@ -89,7 +89,7 @@ class QATFinetuningConfig(BaseModel):
 
 
 AlgorithmConfig = register_schema(
-    Annotated[Union[LoraFinetuningConfig, QATFinetuningConfig], Field(discriminator="type")],
+    Annotated[LoraFinetuningConfig | QATFinetuningConfig, Field(discriminator="type")],
     name="AlgorithmConfig",
 )
 
@@ -184,7 +184,7 @@ class PostTraining(Protocol):
             description="Model descriptor from `llama model list`",
         ),
         checkpoint_dir: Optional[str] = None,
-        algorithm_config: Optional[AlgorithmConfig] = None,
+        algorithm_config: Optional[LoraFinetuningConfig | QATFinetuningConfig] = None,
     ) -> PostTrainingJob: ...
 
     @webmethod(route="/post-training/preference-optimize", method="POST")
diff --git a/llama_stack/distribution/datatypes.py b/llama_stack/distribution/datatypes.py
index 7e1d8c016..e16e047e5 100644
--- a/llama_stack/distribution/datatypes.py
+++ b/llama_stack/distribution/datatypes.py
@@ -125,6 +125,13 @@ class LoggingConfig(BaseModel):
     )
 
 
+class AuthenticationConfig(BaseModel):
+    endpoint: str = Field(
+        ...,
+        description="Endpoint URL to validate authentication tokens",
+    )
+
+
 class ServerConfig(BaseModel):
     port: int = Field(
         default=8321,
@@ -140,6 +147,10 @@ class ServerConfig(BaseModel):
         default=None,
         description="Path to TLS key file for HTTPS",
     )
+    auth: Optional[AuthenticationConfig] = Field(
+        default=None,
+        description="Authentication configuration for the server",
+    )
 
 
 class StackRunConfig(BaseModel):
diff --git a/llama_stack/distribution/server/auth.py b/llama_stack/distribution/server/auth.py
new file mode 100644
index 000000000..bb577bae5
--- /dev/null
+++ b/llama_stack/distribution/server/auth.py
@@ -0,0 +1,69 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+import json
+from urllib.parse import parse_qs
+
+import httpx
+
+from llama_stack.log import get_logger
+
+logger = get_logger(name=__name__, category="auth")
+
+
+class AuthenticationMiddleware:
+    def __init__(self, app, auth_endpoint):
+        self.app = app
+        self.auth_endpoint = auth_endpoint
+
+    async def __call__(self, scope, receive, send):
+        if scope["type"] == "http":
+            headers = dict(scope.get("headers", []))
+            auth_header = headers.get(b"authorization", b"").decode()
+
+            if not auth_header or not auth_header.startswith("Bearer "):
+                return await self._send_auth_error(send, "Missing or invalid Authorization header")
+
+            api_key = auth_header.split("Bearer ", 1)[1]
+
+            path = scope.get("path", "")
+            request_headers = {k.decode(): v.decode() for k, v in headers.items()}
+
+            query_string = scope.get("query_string", b"").decode()
+            params = parse_qs(query_string)
+
+            auth_data = {
+                "api_key": api_key,
+                "request": {
+                    "path": path,
+                    "headers": request_headers,
+                    "params": params,
+                },
+            }
+
+            # Validate with authentication endpoint
+            try:
+                async with httpx.AsyncClient() as client:
+                    response = await client.post(self.auth_endpoint, json=auth_data)
+                    if response.status_code != 200:
+                        logger.warning(f"Authentication failed: {response.status_code}")
+                        return await self._send_auth_error(send, "Authentication failed")
+            except Exception:
+                logger.exception("Error during authentication")
+                return await self._send_auth_error(send, "Authentication service error")
+
+        return await self.app(scope, receive, send)
+
+    async def _send_auth_error(self, send, message):
+        await send(
+            {
+                "type": "http.response.start",
+                "status": 401,
+                "headers": [[b"content-type", b"application/json"]],
+            }
+        )
+        error_msg = json.dumps({"error": {"message": message}}).encode()
+        await send({"type": "http.response.body", "body": error_msg})
diff --git a/llama_stack/distribution/server/server.py b/llama_stack/distribution/server/server.py
index b37b3a007..460acbc87 100644
--- a/llama_stack/distribution/server/server.py
+++ b/llama_stack/distribution/server/server.py
@@ -52,6 +52,7 @@ from llama_stack.providers.utils.telemetry.tracing import (
     start_trace,
 )
 
+from .auth import AuthenticationMiddleware
 from .endpoints import get_all_api_endpoints
 
 REPO_ROOT = Path(__file__).parent.parent.parent.parent
@@ -351,6 +352,11 @@ def main():
     if not os.environ.get("LLAMA_STACK_DISABLE_VERSION_CHECK"):
         app.add_middleware(ClientVersionMiddleware)
 
+    # Add authentication middleware if configured
+    if config.server.auth and config.server.auth.endpoint:
+        logger.info(f"Enabling authentication with endpoint: {config.server.auth.endpoint}")
+        app.add_middleware(AuthenticationMiddleware, auth_endpoint=config.server.auth.endpoint)
+
     try:
         impls = asyncio.run(construct_stack(config))
     except InvalidProviderError as e:
diff --git a/llama_stack/distribution/ui/page/distribution/datasets.py b/llama_stack/distribution/ui/page/distribution/datasets.py
index b583c93fd..6842b29a7 100644
--- a/llama_stack/distribution/ui/page/distribution/datasets.py
+++ b/llama_stack/distribution/ui/page/distribution/datasets.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def datasets():
diff --git a/llama_stack/distribution/ui/page/distribution/eval_tasks.py b/llama_stack/distribution/ui/page/distribution/eval_tasks.py
index 1428ae9ab..492be4700 100644
--- a/llama_stack/distribution/ui/page/distribution/eval_tasks.py
+++ b/llama_stack/distribution/ui/page/distribution/eval_tasks.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def benchmarks():
diff --git a/llama_stack/distribution/ui/page/distribution/models.py b/llama_stack/distribution/ui/page/distribution/models.py
index 3141c1627..f29459098 100644
--- a/llama_stack/distribution/ui/page/distribution/models.py
+++ b/llama_stack/distribution/ui/page/distribution/models.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def models():
diff --git a/llama_stack/distribution/ui/page/distribution/providers.py b/llama_stack/distribution/ui/page/distribution/providers.py
index 9aeb7f2a5..c660cb986 100644
--- a/llama_stack/distribution/ui/page/distribution/providers.py
+++ b/llama_stack/distribution/ui/page/distribution/providers.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def providers():
diff --git a/llama_stack/distribution/ui/page/distribution/resources.py b/llama_stack/distribution/ui/page/distribution/resources.py
index 684270d4d..5e10e6e80 100644
--- a/llama_stack/distribution/ui/page/distribution/resources.py
+++ b/llama_stack/distribution/ui/page/distribution/resources.py
@@ -4,14 +4,15 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from page.distribution.benchmarks import benchmarks
-from page.distribution.datasets import datasets
-from page.distribution.models import models
-from page.distribution.scoring_functions import scoring_functions
-from page.distribution.shields import shields
-from page.distribution.vector_dbs import vector_dbs
 from streamlit_option_menu import option_menu
 
+from llama_stack.distribution.ui.page.distribution.datasets import datasets
+from llama_stack.distribution.ui.page.distribution.eval_tasks import benchmarks
+from llama_stack.distribution.ui.page.distribution.models import models
+from llama_stack.distribution.ui.page.distribution.scoring_functions import scoring_functions
+from llama_stack.distribution.ui.page.distribution.shields import shields
+from llama_stack.distribution.ui.page.distribution.vector_dbs import vector_dbs
+
 
 def resources_page():
     options = [
diff --git a/llama_stack/distribution/ui/page/distribution/scoring_functions.py b/llama_stack/distribution/ui/page/distribution/scoring_functions.py
index 6a2a08c6d..193146356 100644
--- a/llama_stack/distribution/ui/page/distribution/scoring_functions.py
+++ b/llama_stack/distribution/ui/page/distribution/scoring_functions.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def scoring_functions():
diff --git a/llama_stack/distribution/ui/page/distribution/shields.py b/llama_stack/distribution/ui/page/distribution/shields.py
index b5ed27ef9..67d66d64f 100644
--- a/llama_stack/distribution/ui/page/distribution/shields.py
+++ b/llama_stack/distribution/ui/page/distribution/shields.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def shields():
diff --git a/llama_stack/distribution/ui/page/distribution/vector_dbs.py b/llama_stack/distribution/ui/page/distribution/vector_dbs.py
index 1c9d06e8d..49a4f25bb 100644
--- a/llama_stack/distribution/ui/page/distribution/vector_dbs.py
+++ b/llama_stack/distribution/ui/page/distribution/vector_dbs.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def vector_dbs():
diff --git a/llama_stack/distribution/ui/page/evaluations/app_eval.py b/llama_stack/distribution/ui/page/evaluations/app_eval.py
index 26bc28451..d7bc6388c 100644
--- a/llama_stack/distribution/ui/page/evaluations/app_eval.py
+++ b/llama_stack/distribution/ui/page/evaluations/app_eval.py
@@ -8,8 +8,9 @@ import json
 
 import pandas as pd
 import streamlit as st
-from modules.api import llama_stack_api
-from modules.utils import process_dataset
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
+from llama_stack.distribution.ui.modules.utils import process_dataset
 
 
 def application_evaluation_page():
diff --git a/llama_stack/distribution/ui/page/evaluations/native_eval.py b/llama_stack/distribution/ui/page/evaluations/native_eval.py
index 7c39adc4a..97f875e17 100644
--- a/llama_stack/distribution/ui/page/evaluations/native_eval.py
+++ b/llama_stack/distribution/ui/page/evaluations/native_eval.py
@@ -8,7 +8,8 @@ import json
 
 import pandas as pd
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 
 def select_benchmark_1():
diff --git a/llama_stack/distribution/ui/page/playground/chat.py b/llama_stack/distribution/ui/page/playground/chat.py
index e69f559db..8e7345169 100644
--- a/llama_stack/distribution/ui/page/playground/chat.py
+++ b/llama_stack/distribution/ui/page/playground/chat.py
@@ -5,7 +5,8 @@
 # the root directory of this source tree.
 
 import streamlit as st
-from modules.api import llama_stack_api
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
 
 # Sidebar configurations
 with st.sidebar:
diff --git a/llama_stack/distribution/ui/page/playground/rag.py b/llama_stack/distribution/ui/page/playground/rag.py
index 7ee934fb7..e2f451668 100644
--- a/llama_stack/distribution/ui/page/playground/rag.py
+++ b/llama_stack/distribution/ui/page/playground/rag.py
@@ -7,9 +7,10 @@
 import streamlit as st
 from llama_stack_client.lib.agents.agent import Agent
 from llama_stack_client.lib.agents.event_logger import EventLogger
-from llama_stack_client.types.memory_insert_params import Document
-from modules.api import llama_stack_api
-from modules.utils import data_url_from_file
+from llama_stack_client.types.shared.document import Document
+
+from llama_stack.distribution.ui.modules.api import llama_stack_api
+from llama_stack.distribution.ui.modules.utils import data_url_from_file
 
 
 def rag_chat_page():
diff --git a/llama_stack/providers/inline/inference/meta_reference/parallel_utils.py b/llama_stack/providers/inline/inference/meta_reference/parallel_utils.py
index 738f9ddcd..e8767c2ff 100644
--- a/llama_stack/providers/inline/inference/meta_reference/parallel_utils.py
+++ b/llama_stack/providers/inline/inference/meta_reference/parallel_utils.py
@@ -10,6 +10,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
+import copy
 import json
 import logging
 import multiprocessing
@@ -213,7 +214,7 @@ def maybe_parse_message(maybe_json: Optional[str]) -> Optional[ProcessingMessage
 
 def parse_message(json_str: str) -> ProcessingMessage:
     data = json.loads(json_str)
-    return ProcessingMessageWrapper(**data).payload
+    return copy.deepcopy(ProcessingMessageWrapper(**data).payload)
 
 
 def worker_process_entrypoint(
diff --git a/llama_stack/providers/inline/post_training/common/validator.py b/llama_stack/providers/inline/post_training/common/validator.py
index e76edf3a0..b0aec6187 100644
--- a/llama_stack/providers/inline/post_training/common/validator.py
+++ b/llama_stack/providers/inline/post_training/common/validator.py
@@ -9,6 +9,9 @@
 #
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
+
+from typing import Any
+
 from llama_stack.apis.common.type_system import (
     ChatCompletionInputType,
     DialogType,
@@ -20,7 +23,7 @@ from llama_stack.providers.utils.common.data_schema_validator import (
     validate_dataset_schema,
 )
 
-EXPECTED_DATASET_SCHEMA = {
+EXPECTED_DATASET_SCHEMA: dict[str, list[dict[str, Any]]] = {
     "instruct": [
         {
             ColumnName.chat_completion_input.value: ChatCompletionInputType(),
@@ -41,6 +44,9 @@ async def validate_input_dataset_schema(
     dataset_type: str,
 ) -> None:
     dataset_def = await datasets_api.get_dataset(dataset_id=dataset_id)
+    if not dataset_def:
+        raise ValueError(f"Dataset {dataset_id} does not exist.")
+
     if not dataset_def.dataset_schema or len(dataset_def.dataset_schema) == 0:
         raise ValueError(f"Dataset {dataset_id} does not have a schema defined.")
 
diff --git a/llama_stack/providers/inline/post_training/torchtune/common/checkpointer.py b/llama_stack/providers/inline/post_training/torchtune/common/checkpointer.py
index 64d61b053..fcadd0884 100644
--- a/llama_stack/providers/inline/post_training/torchtune/common/checkpointer.py
+++ b/llama_stack/providers/inline/post_training/torchtune/common/checkpointer.py
@@ -37,7 +37,7 @@ class TorchtuneCheckpointer:
         checkpoint_files: List[str],
         output_dir: str,
         model_type: str,
-    ) -> None:
+    ):
         # Fail fast if ``checkpoint_files`` is invalid
         # TODO: support loading more than one file
         if len(checkpoint_files) != 1:
@@ -58,7 +58,7 @@ class TorchtuneCheckpointer:
         """
         Load Meta checkpoint from file. Currently only loading from a single file is supported.
         """
-        state_dict: Dict[str:Any] = {}
+        state_dict: Dict[str, Any] = {}
         model_state_dict = safe_torch_load(self._checkpoint_path)
         if self._model_type == ModelType.LLAMA3_VISION:
             from torchtune.models.llama3_2_vision._convert_weights import (
@@ -85,10 +85,10 @@ class TorchtuneCheckpointer:
         state_dict: Dict[str, Any],
         epoch: int,
         adapter_only: bool = False,
-        checkpoint_format: str = "meta",
+        checkpoint_format: str | None = None,
     ) -> str:
         model_file_path = Path(self._output_dir) / f"{self._model_id}-{self._training_algorithm}-{epoch}"
-        if checkpoint_format == "meta":
+        if checkpoint_format == "meta" or checkpoint_format is None:
             self._save_meta_format_checkpoint(model_file_path, state_dict, adapter_only)
         elif checkpoint_format == "huggingface":
             # Note: for saving hugging face format checkpoints, we only suppport saving adapter weights now
diff --git a/llama_stack/providers/inline/post_training/torchtune/common/utils.py b/llama_stack/providers/inline/post_training/torchtune/common/utils.py
index 98e16f9d7..f8a1c0436 100644
--- a/llama_stack/providers/inline/post_training/torchtune/common/utils.py
+++ b/llama_stack/providers/inline/post_training/torchtune/common/utils.py
@@ -10,7 +10,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Any, Callable, Dict
+from typing import Callable, Dict
 
 import torch
 from pydantic import BaseModel
@@ -25,10 +25,13 @@ from llama_stack.apis.post_training import DatasetFormat
 from llama_stack.models.llama.datatypes import Model
 from llama_stack.models.llama.sku_list import resolve_model
 
+BuildLoraModelCallable = Callable[..., torch.nn.Module]
+BuildTokenizerCallable = Callable[..., Llama3Tokenizer]
+
 
 class ModelConfig(BaseModel):
-    model_definition: Any
-    tokenizer_type: Any
+    model_definition: BuildLoraModelCallable
+    tokenizer_type: BuildTokenizerCallable
     checkpoint_type: str
 
 
@@ -51,10 +54,6 @@ DATA_FORMATS: Dict[str, Transform] = {
 }
 
 
-BuildLoraModelCallable = Callable[..., torch.nn.Module]
-BuildTokenizerCallable = Callable[..., Llama3Tokenizer]
-
-
 def _validate_model_id(model_id: str) -> Model:
     model = resolve_model(model_id)
     if model is None or model.core_model_id.value not in MODEL_CONFIGS:
diff --git a/llama_stack/providers/inline/post_training/torchtune/datasets/sft.py b/llama_stack/providers/inline/post_training/torchtune/datasets/sft.py
index b556b59a6..050996860 100644
--- a/llama_stack/providers/inline/post_training/torchtune/datasets/sft.py
+++ b/llama_stack/providers/inline/post_training/torchtune/datasets/sft.py
@@ -55,7 +55,7 @@ class SFTDataset(Dataset):
         if "messages" in transformed_sample:
             validate_messages(transformed_sample["messages"])
 
-        tokenized_dict = self._model_transform(transformed_sample)
+        tokenized_dict: dict[str, Any] = self._model_transform(transformed_sample)
 
         if not ("tokens" in tokenized_dict and "mask" in tokenized_dict):
             keys_str = ", ".join(tokenized_dict.keys())
diff --git a/llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py b/llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py
index 0f89b4064..edc1ceb90 100644
--- a/llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py
+++ b/llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device.py
@@ -37,10 +37,10 @@ from llama_stack.apis.common.training_types import PostTrainingMetric
 from llama_stack.apis.datasetio import DatasetIO
 from llama_stack.apis.datasets import Datasets
 from llama_stack.apis.post_training import (
-    AlgorithmConfig,
     Checkpoint,
     LoraFinetuningConfig,
     OptimizerConfig,
+    QATFinetuningConfig,
     TrainingConfig,
 )
 from llama_stack.distribution.utils.config_dirs import DEFAULT_CHECKPOINT_DIR
@@ -73,6 +73,9 @@ class LoraFinetuningSingleDevice:
 
     # Currently logging only logs limited training metrics to local disk
     # will figure out more loggings and how it works with telemetry in future PRs
+
+    _checkpointer: TorchtuneCheckpointer
+
     def __init__(
         self,
         config: TorchtunePostTrainingConfig,
@@ -82,7 +85,7 @@ class LoraFinetuningSingleDevice:
         logger_config: Dict[str, Any],
         model: str,
         checkpoint_dir: Optional[str],
-        algorithm_config: Optional[AlgorithmConfig],
+        algorithm_config: LoraFinetuningConfig | QATFinetuningConfig | None,
         datasetio_api: DatasetIO,
         datasets_api: Datasets,
     ) -> None:
@@ -109,12 +112,12 @@ class LoraFinetuningSingleDevice:
             return str(checkpoint_dir)
 
         if checkpoint_dir and checkpoint_dir != "null":
-            self.checkpoint_dir = config.checkpoint_dir
+            self.checkpoint_dir = checkpoint_dir
         else:
-            model = resolve_model(self.model_id)
-            if model is None:
+            model_obj = resolve_model(self.model_id)
+            if model_obj is None:
                 raise ValueError(f"{self.model_id} not found. Your model id should be in the llama models SKU list")
-            self.checkpoint_dir = model_checkpoint_dir(model)
+            self.checkpoint_dir = model_checkpoint_dir(model_obj)
 
         self._output_dir = str(DEFAULT_CHECKPOINT_DIR)
         self._checkpoint_format = config.checkpoint_format
@@ -135,16 +138,16 @@ class LoraFinetuningSingleDevice:
         self.max_validation_steps = training_config.max_validation_steps
 
         self._clip_grad_norm = 1.0
-        self._enable_activation_checkpointing = (
-            (training_config.efficiency_config.enable_activation_checkpointing)
-            if training_config.efficiency_config
-            else False
-        )
-        self._enable_activation_offloading = (
-            (training_config.efficiency_config.enable_activation_offloading)
-            if training_config.efficiency_config
-            else False
-        )
+
+        self._enable_activation_checkpointing = False
+        self._enable_activation_offloading = False
+        if training_config.efficiency_config:
+            if training_config.efficiency_config.enable_activation_checkpointing:
+                self._enable_activation_checkpointing = (
+                    training_config.efficiency_config.enable_activation_checkpointing
+                )
+            if training_config.efficiency_config.enable_activation_offloading:
+                self._enable_activation_offloading = training_config.efficiency_config.enable_activation_offloading
 
         self.datasetio_api = datasetio_api
         self.datasets_api = datasets_api
@@ -451,12 +454,12 @@ class LoraFinetuningSingleDevice:
         """
         # Initialize tokens count and running loss (for grad accumulation)
         t0 = time.perf_counter()
-        running_loss = 0
+        running_loss: float = 0.0
         num_tokens = 0
 
         # training artifacts
         checkpoints = []
-        memory_stats = {}
+        memory_stats: Dict[str, Any] = {}
 
         # self.epochs_run should be non-zero when we're resuming from a checkpoint
         for curr_epoch in range(self.epochs_run, self.total_epochs):
@@ -484,7 +487,7 @@ class LoraFinetuningSingleDevice:
                 # Loss is normalized by default so we multiply by the number of tokens
                 # This way we can normalize by the total number of tokens if we're accumulating gradients
                 current_loss = await self._loss_step(batch) * current_num_tokens
-                running_loss += current_loss
+                running_loss += current_loss.detach().item()
                 current_loss.backward()
 
                 # Step with optimizer
@@ -500,7 +503,7 @@ class LoraFinetuningSingleDevice:
                     # Update the number of steps when the weights are updated
                     self.global_step += 1
 
-                    loss_to_log = running_loss.item() / num_tokens
+                    loss_to_log = running_loss / num_tokens
 
                     pbar.update(1)
                     pbar.set_description(f"{curr_epoch + 1}|{self.global_step}|Loss: {loss_to_log}")
@@ -523,7 +526,7 @@ class LoraFinetuningSingleDevice:
                     )
 
                     # Reset running stats for the next step
-                    running_loss = 0
+                    running_loss = 0.0
                     num_tokens = 0
                     t0 = time.perf_counter()
 
diff --git a/pyproject.toml b/pyproject.toml
index f57b91462..107150cee 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -228,10 +228,6 @@ exclude = [
     "^llama_stack/providers/inline/inference/sentence_transformers/sentence_transformers\\.py$",
     "^llama_stack/providers/inline/inference/vllm/",
     "^llama_stack/providers/inline/post_training/common/validator\\.py$",
-    "^llama_stack/providers/inline/post_training/torchtune/common/checkpointer\\.py$",
-    "^llama_stack/providers/inline/post_training/torchtune/common/utils\\.py$",
-    "^llama_stack/providers/inline/post_training/torchtune/datasets/sft\\.py$",
-    "^llama_stack/providers/inline/post_training/torchtune/recipes/lora_finetuning_single_device\\.py$",
     "^llama_stack/providers/inline/post_training/torchtune/post_training\\.py$",
     "^llama_stack/providers/inline/safety/code_scanner/",
     "^llama_stack/providers/inline/safety/llama_guard/",
diff --git a/tests/unit/server/test_auth.py b/tests/unit/server/test_auth.py
new file mode 100644
index 000000000..70f08dbd6
--- /dev/null
+++ b/tests/unit/server/test_auth.py
@@ -0,0 +1,124 @@
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+
+from unittest.mock import AsyncMock, patch
+
+import pytest
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+from llama_stack.distribution.server.auth import AuthenticationMiddleware
+
+
+@pytest.fixture
+def mock_auth_endpoint():
+    return "http://mock-auth-service/validate"
+
+
+@pytest.fixture
+def valid_api_key():
+    return "valid_api_key_12345"
+
+
+@pytest.fixture
+def invalid_api_key():
+    return "invalid_api_key_67890"
+
+
+@pytest.fixture
+def app(mock_auth_endpoint):
+    app = FastAPI()
+    app.add_middleware(AuthenticationMiddleware, auth_endpoint=mock_auth_endpoint)
+
+    @app.get("/test")
+    def test_endpoint():
+        return {"message": "Authentication successful"}
+
+    return app
+
+
+@pytest.fixture
+def client(app):
+    return TestClient(app)
+
+
+async def mock_post_success(*args, **kwargs):
+    mock_response = AsyncMock()
+    mock_response.status_code = 200
+    return mock_response
+
+
+async def mock_post_failure(*args, **kwargs):
+    mock_response = AsyncMock()
+    mock_response.status_code = 401
+    return mock_response
+
+
+async def mock_post_exception(*args, **kwargs):
+    raise Exception("Connection error")
+
+
+def test_missing_auth_header(client):
+    response = client.get("/test")
+    assert response.status_code == 401
+    assert "Missing or invalid Authorization header" in response.json()["error"]["message"]
+
+
+def test_invalid_auth_header_format(client):
+    response = client.get("/test", headers={"Authorization": "InvalidFormat token123"})
+    assert response.status_code == 401
+    assert "Missing or invalid Authorization header" in response.json()["error"]["message"]
+
+
+@patch("httpx.AsyncClient.post", new=mock_post_success)
+def test_valid_authentication(client, valid_api_key):
+    response = client.get("/test", headers={"Authorization": f"Bearer {valid_api_key}"})
+    assert response.status_code == 200
+    assert response.json() == {"message": "Authentication successful"}
+
+
+@patch("httpx.AsyncClient.post", new=mock_post_failure)
+def test_invalid_authentication(client, invalid_api_key):
+    response = client.get("/test", headers={"Authorization": f"Bearer {invalid_api_key}"})
+    assert response.status_code == 401
+    assert "Authentication failed" in response.json()["error"]["message"]
+
+
+@patch("httpx.AsyncClient.post", new=mock_post_exception)
+def test_auth_service_error(client, valid_api_key):
+    response = client.get("/test", headers={"Authorization": f"Bearer {valid_api_key}"})
+    assert response.status_code == 401
+    assert "Authentication service error" in response.json()["error"]["message"]
+
+
+def test_auth_request_payload(client, valid_api_key, mock_auth_endpoint):
+    with patch("httpx.AsyncClient.post") as mock_post:
+        mock_response = AsyncMock()
+        mock_response.status_code = 200
+        mock_post.return_value = mock_response
+
+        client.get(
+            "/test?param1=value1&param2=value2",
+            headers={
+                "Authorization": f"Bearer {valid_api_key}",
+                "User-Agent": "TestClient",
+                "Content-Type": "application/json",
+            },
+        )
+
+        # Check that the auth endpoint was called with the correct payload
+        call_args = mock_post.call_args
+        assert call_args is not None
+
+        url, kwargs = call_args[0][0], call_args[1]
+        assert url == mock_auth_endpoint
+
+        payload = kwargs["json"]
+        assert payload["api_key"] == valid_api_key
+        assert payload["request"]["path"] == "/test"
+        assert "authorization" in payload["request"]["headers"]
+        assert "param1" in payload["request"]["params"]
+        assert "param2" in payload["request"]["params"]