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/memory/memory.py

@@ -0,0 +1,156 @@
+# 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.
+#
+# This source code is licensed under the terms described in the LICENSE file in
+# the root directory of this source tree.
+from typing import List, Optional, Protocol
+
+from llama_models.schema_utils import json_schema_type, webmethod
+
+from pydantic import BaseModel, Field
+from typing_extensions import Annotated
+
+from llama_models.llama3.api.datatypes import *  # noqa: F403
+
+
+@json_schema_type
+class MemoryBankDocument(BaseModel):
+    document_id: str
+    content: InterleavedTextMedia | URL
+    mime_type: str | None = None
+    metadata: Dict[str, Any] = Field(default_factory=dict)
+
+
+@json_schema_type
+class MemoryBankType(Enum):
+    vector = "vector"
+    keyvalue = "keyvalue"
+    keyword = "keyword"
+    graph = "graph"
+
+
+class VectorMemoryBankConfig(BaseModel):
+    type: Literal[MemoryBankType.vector.value] = MemoryBankType.vector.value
+    embedding_model: str
+    chunk_size_in_tokens: int
+    overlap_size_in_tokens: Optional[int] = None
+
+
+class KeyValueMemoryBankConfig(BaseModel):
+    type: Literal[MemoryBankType.keyvalue.value] = MemoryBankType.keyvalue.value
+
+
+class KeywordMemoryBankConfig(BaseModel):
+    type: Literal[MemoryBankType.keyword.value] = MemoryBankType.keyword.value
+
+
+class GraphMemoryBankConfig(BaseModel):
+    type: Literal[MemoryBankType.graph.value] = MemoryBankType.graph.value
+
+
+MemoryBankConfig = Annotated[
+    Union[
+        VectorMemoryBankConfig,
+        KeyValueMemoryBankConfig,
+        KeywordMemoryBankConfig,
+        GraphMemoryBankConfig,
+    ],
+    Field(discriminator="type"),
+]
+
+
+class Chunk(BaseModel):
+    content: InterleavedTextMedia
+    token_count: int
+    document_id: str
+
+
+@json_schema_type
+class QueryDocumentsResponse(BaseModel):
+    chunks: List[Chunk]
+    scores: List[float]
+
+
+@json_schema_type
+class QueryAPI(Protocol):
+    @webmethod(route="/query_documents")
+    def query_documents(
+        self,
+        query: InterleavedTextMedia,
+        params: Optional[Dict[str, Any]] = None,
+    ) -> QueryDocumentsResponse: ...
+
+
+@json_schema_type
+class MemoryBank(BaseModel):
+    bank_id: str
+    name: str
+    config: MemoryBankConfig
+    # if there's a pre-existing (reachable-from-distribution) store which supports QueryAPI
+    url: Optional[URL] = None
+
+
+class Memory(Protocol):
+    @webmethod(route="/memory_banks/create")
+    async def create_memory_bank(
+        self,
+        name: str,
+        config: MemoryBankConfig,
+        url: Optional[URL] = None,
+    ) -> MemoryBank: ...
+
+    @webmethod(route="/memory_banks/list", method="GET")
+    async def list_memory_banks(self) -> List[MemoryBank]: ...
+
+    @webmethod(route="/memory_banks/get", method="GET")
+    async def get_memory_bank(self, bank_id: str) -> Optional[MemoryBank]: ...
+
+    @webmethod(route="/memory_banks/drop", method="DELETE")
+    async def drop_memory_bank(
+        self,
+        bank_id: str,
+    ) -> str: ...
+
+    # this will just block now until documents are inserted, but it should
+    # probably return a Job instance which can be polled for completion
+    @webmethod(route="/memory_bank/insert")
+    async def insert_documents(
+        self,
+        bank_id: str,
+        documents: List[MemoryBankDocument],
+        ttl_seconds: Optional[int] = None,
+    ) -> None: ...
+
+    @webmethod(route="/memory_bank/update")
+    async def update_documents(
+        self,
+        bank_id: str,
+        documents: List[MemoryBankDocument],
+    ) -> None: ...
+
+    @webmethod(route="/memory_bank/query")
+    async def query_documents(
+        self,
+        bank_id: str,
+        query: InterleavedTextMedia,
+        params: Optional[Dict[str, Any]] = None,
+    ) -> QueryDocumentsResponse: ...
+
+    @webmethod(route="/memory_bank/documents/get", method="GET")
+    async def get_documents(
+        self,
+        bank_id: str,
+        document_ids: List[str],
+    ) -> List[MemoryBankDocument]: ...
+
+    @webmethod(route="/memory_bank/documents/delete", method="DELETE")
+    async def delete_documents(
+        self,
+        bank_id: str,
+        document_ids: List[str],
+    ) -> None: ...