API Updates (#73)

* API Keys passed from Client instead of distro configuration

* delete distribution registry

* Rename the "package" word away

* Introduce a "Router" layer for providers

Some providers need to be factorized and considered as thin routing
layers on top of other providers. Consider two examples:

- The inference API should be a routing layer over inference providers,
  routed using the "model" key
- The memory banks API is another instance where various memory bank
  types will be provided by independent providers (e.g., a vector store
  is served by Chroma while a keyvalue memory can be served by Redis or
  PGVector)

This commit introduces a generalized routing layer for this purpose.

* update `apis_to_serve`

* llama_toolchain -> llama_stack

* Codemod from llama_toolchain -> llama_stack

- added providers/registry
- cleaned up api/ subdirectories and moved impls away
- restructured api/api.py
- from llama_stack.apis.<api> import foo should work now
- update imports to do llama_stack.apis.<api>
- update many other imports
- added __init__, fixed some registry imports
- updated registry imports
- create_agentic_system -> create_agent
- AgenticSystem -> Agent

* Moved some stuff out of common/; re-generated OpenAPI spec

* llama-toolchain -> llama-stack (hyphens)

* add control plane API

* add redis adapter + sqlite provider

* move core -> distribution

* Some more toolchain -> stack changes

* small naming shenanigans

* Removing custom tool and agent utilities and moving them client side

* Move control plane to distribution server for now

* Remove control plane from API list

* no codeshield dependency randomly plzzzzz

* Add "fire" as a dependency

* add back event loggers

* stack configure fixes

* use brave instead of bing in the example client

* add init file so it gets packaged

* add init files so it gets packaged

* Update MANIFEST

* bug fix

---------

Co-authored-by: Hardik Shah <hjshah@fb.com>
Co-authored-by: Xi Yan <xiyan@meta.com>
Co-authored-by: Ashwin Bharambe <ashwin@meta.com>

llama_stack/apis/evals/evals.py

@@ -0,0 +1,122 @@
+# 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 enum import Enum
+from typing import List, Protocol
+
+from llama_models.schema_utils import webmethod
+
+from pydantic import BaseModel
+
+from llama_models.llama3.api.datatypes import *  # noqa: F403
+from llama_stack.apis.dataset import *  # noqa: F403
+from llama_stack.apis.common.training_types import *  # noqa: F403
+
+
+class TextGenerationMetric(Enum):
+    perplexity = "perplexity"
+    rouge = "rouge"
+    bleu = "bleu"
+
+
+class QuestionAnsweringMetric(Enum):
+    em = "em"
+    f1 = "f1"
+
+
+class SummarizationMetric(Enum):
+    rouge = "rouge"
+    bleu = "bleu"
+
+
+class EvaluationJob(BaseModel):
+    job_uuid: str
+
+
+class EvaluationJobLogStream(BaseModel):
+    job_uuid: str
+
+
+class EvaluateTaskRequestCommon(BaseModel):
+    job_uuid: str
+    dataset: TrainEvalDataset
+
+    checkpoint: Checkpoint
+
+    # generation params
+    sampling_params: SamplingParams = SamplingParams()
+
+
+@json_schema_type
+class EvaluateTextGenerationRequest(EvaluateTaskRequestCommon):
+    """Request to evaluate text generation."""
+
+    metrics: List[TextGenerationMetric]
+
+
+@json_schema_type
+class EvaluateQuestionAnsweringRequest(EvaluateTaskRequestCommon):
+    """Request to evaluate question answering."""
+
+    metrics: List[QuestionAnsweringMetric]
+
+
+@json_schema_type
+class EvaluateSummarizationRequest(EvaluateTaskRequestCommon):
+    """Request to evaluate summarization."""
+
+    metrics: List[SummarizationMetric]
+
+
+class EvaluationJobStatusResponse(BaseModel):
+    job_uuid: str
+
+
+@json_schema_type
+class EvaluationJobArtifactsResponse(BaseModel):
+    """Artifacts of a evaluation job."""
+
+    job_uuid: str
+
+
+class Evaluations(Protocol):
+    @webmethod(route="/evaluate/text_generation/")
+    def evaluate_text_generation(
+        self,
+        metrics: List[TextGenerationMetric],
+    ) -> EvaluationJob: ...
+
+    @webmethod(route="/evaluate/question_answering/")
+    def evaluate_question_answering(
+        self,
+        metrics: List[QuestionAnsweringMetric],
+    ) -> EvaluationJob: ...
+
+    @webmethod(route="/evaluate/summarization/")
+    def evaluate_summarization(
+        self,
+        metrics: List[SummarizationMetric],
+    ) -> EvaluationJob: ...
+
+    @webmethod(route="/evaluate/jobs")
+    def get_evaluation_jobs(self) -> List[EvaluationJob]: ...
+
+    @webmethod(route="/evaluate/job/status")
+    def get_evaluation_job_status(
+        self, job_uuid: str
+    ) -> EvaluationJobStatusResponse: ...
+
+    # sends SSE stream of logs
+    @webmethod(route="/evaluate/job/logs")
+    def get_evaluation_job_logstream(self, job_uuid: str) -> EvaluationJobLogStream: ...
+
+    @webmethod(route="/evaluate/job/cancel")
+    def cancel_evaluation_job(self, job_uuid: str) -> None: ...
+
+    @webmethod(route="/evaluate/job/artifacts")
+    def get_evaluation_job_artifacts(
+        self, job_uuid: str
+    ) -> EvaluationJobArtifactsResponse: ...