(feat) Add synthetic_data_kit provider integration for synthetic_data_generation API

The synthetic_data_kit provider integration enables high-quality synthetic dataset
generation for fine-tuning LLMs. This commit sets up the initial provider
registration and fixes provider resolution to properly handle type casting and
imports, ensuring proper integration with llama-stack's provider system.

Implementation of the actual provider functionality will follow in a subsequent
commit.

Signed-off-by: Alina Ryan <aliryan@redhat.com>

llama_stack/apis/datatypes.py

@@ -35,6 +35,8 @@ class Api(Enum):
     tool_groups = "tool_groups"
     files = "files"
 
+    synthetic_data_generation = "synthetic_data_generation"
+
     # built-in API
     inspect = "inspect"
 

llama_stack/apis/synthetic_data_generation/providers/__init__.py

@@ -0,0 +1,19 @@
+# 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.
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# SPDX-License-Identifier: MIT
+
+from typing import cast
+
+from llama_stack.apis.synthetic_data_generation import SyntheticDataGeneration
+from llama_stack.providers.utils.resolver import get_provider_impl as _get_provider_impl
+
+
+def get_provider_impl() -> SyntheticDataGeneration:
+    return cast(SyntheticDataGeneration, _get_provider_impl(SyntheticDataGeneration))

llama_stack/apis/synthetic_data_generation/registry.py

@@ -1,13 +0,0 @@
-# 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 llama_stack.apis.synthetic_data_generation import SyntheticDataGeneration
-
-SYNTHETIC_DATA_GENERATION_PROVIDERS: dict[str, SyntheticDataGeneration] = {}
-
-
-def get_provider(name: str = "meta_synthetic_data_kit") -> SyntheticDataGeneration:
-    raise NotImplementedError(f"No provider registered yet for synthetic_data_generation (requested: {name})")

llama_stack/providers/inline/synthetic_data_generation/synthetic_data_kit/__init__.py

@@ -0,0 +1,5 @@
+# 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.

llama_stack/providers/inline/synthetic_data_generation/synthetic_data_kit/config.py

@@ -0,0 +1,100 @@
+# 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.
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# SPDX-License-Identifier: MIT
+
+import requests
+from typing import Any, Dict, Optional
+from pydantic import BaseModel, Field
+
+from llama_stack.apis.inference import Message
+from llama_stack.apis.synthetic_data_generation import (
+    FilteringFunction,
+    SyntheticDataGeneration,
+    SyntheticDataGenerationResponse,
+)
+
+
+class SyntheticDataKitConfig(BaseModel):
+    """Configuration for the Synthetic Data Kit provider"""
+    llm: Dict[str, Any] = Field(
+        default_factory=lambda: {
+            "provider": "vllm",
+            "model": "meta-llama/Llama-3.2-3B-Instruct",
+        }
+    )
+    vllm: Dict[str, Any] = Field(
+        default_factory=lambda: {
+            "api_base": "http://localhost:8000/v1",
+        }
+    )
+    generation: Dict[str, Any] = Field(
+        default_factory=lambda: {
+            "temperature": 0.7,
+            "chunk_size": 4000,
+            "num_pairs": 25,
+        }
+    )
+    curate: Dict[str, Any] = Field(
+        default_factory=lambda: {
+            "threshold": 7.0,
+            "batch_size": 8,
+        }
+    )
+
+    @classmethod
+    def sample_run_config(cls) -> "SyntheticDataKitConfig":
+        """Create a sample configuration for testing"""
+        return cls()
+
+
+class SyntheticDataKitProvider(SyntheticDataGeneration):
+    def __init__(self, config: SyntheticDataKitConfig):
+        self.config = config
+        self._validate_connection()
+
+    def _validate_connection(self) -> None:
+        """Validate connection to vLLM server"""
+        try:
+            response = requests.get(f"http://localhost:{self.config.vllm['port']}/health")
+            response.raise_for_status()
+        except Exception as e:
+            raise RuntimeError(f"Failed to connect to vLLM server: {e}") from e
+
+    def synthetic_data_generate(
+        self,
+        dialogs: list[Message],
+        filtering_function: FilteringFunction = FilteringFunction.none,
+        model: str | None = None,
+    ) -> SyntheticDataGenerationResponse:
+        # Convert dialogs to SDK format
+        formatted_dialogs = [{"role": dialog.role, "content": dialog.content} for dialog in dialogs]
+
+        payload = {
+            "dialogs": formatted_dialogs,
+            "filtering_function": filtering_function.value,
+            "model": model or self.config.llm["model"],
+            "generation": self.config.generation,
+            "curate": self.config.curate if filtering_function != FilteringFunction.none else None,
+        }
+
+        try:
+            response = requests.post(
+                f"http://localhost:{self.config.vllm['port']}/v1/synthetic-data-generation/generate",
+                json=payload,
+            )
+            response.raise_for_status()
+            result = response.json()
+
+            return SyntheticDataGenerationResponse(
+                synthetic_data=result.get("synthetic_data", []),
+                statistics=result.get("statistics"),
+            )
+        except requests.exceptions.RequestException as e:
+            raise RuntimeError(f"Synthetic data generation failed: {e}") from e

llama_stack/providers/inline/synthetic_data_generation/synthetic_data_kit/synthetic_data_kit.py

@@ -0,0 +1,55 @@
+# 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.
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# SPDX-License-Identifier: MIT
+
+from typing import Optional
+import synthetic_data_kit as sdk
+
+from llama_stack.apis.inference import Message
+from llama_stack.apis.synthetic_data_generation import (
+    FilteringFunction,
+    SyntheticDataGeneration,
+    SyntheticDataGenerationResponse,
+)
+
+from .config import SyntheticDataKitConfig
+
+
+class SyntheticDataKitProvider(SyntheticDataGeneration):
+    def __init__(self, config: SyntheticDataKitConfig):
+        self.config = config
+        self.sdk = sdk.SyntheticDataKit(
+            llm=self.config.llm,
+            vllm=self.config.vllm,
+            generation=self.config.generation,
+            curate=self.config.curate,
+        )
+
+    async def synthetic_data_generate(
+        self,
+        dialogs: list[Message],
+        filtering_function: FilteringFunction = FilteringFunction.none,
+        model: Optional[str] = None,
+    ) -> SyntheticDataGenerationResponse:
+        # Convert dialogs to text format
+        text_content = "\n".join(d.content for d in dialogs)
+        
+        # Generate synthetic data
+        if filtering_function == FilteringFunction.none:
+            result = await self.sdk.create(text_content, type="qa")
+        else:
+            # Generate and then curate
+            generated = await self.sdk.create(text_content, type="qa")
+            result = await self.sdk.curate(generated)
+
+        return SyntheticDataGenerationResponse(
+            synthetic_data=result.get("synthetic_data", []),
+            statistics=result.get("statistics"),
+        )

llama_stack/providers/registry/synthetic_data_generation.py

@@ -0,0 +1,28 @@
+# 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.
+
+# Copyright (c) Meta Platforms, Inc. and affiliates.
+# All rights reserved.
+#
+# SPDX-License-Identifier: MIT
+
+from llama_stack.providers.datatypes import Api, InlineProviderSpec, ProviderSpec
+
+
+def available_providers() -> list[ProviderSpec]:
+    return [
+        InlineProviderSpec(
+            api=Api.synthetic_data_generation,
+            provider_type="inline::synthetic_data_kit",
+            pip_packages=[
+                "synthetic-data-kit",
+                "vllm",
+                "pydantic",
+            ],
+            module="llama_stack.providers.inline.synthetic_data_generation.synthetic_data_kit_inline",
+            config_class="llama_stack.providers.inline.synthetic_data_generation.config.SyntheticDataKitConfig",
+        ),
+    ]