chore: Stack server no longer depends on llama-stack-client (#4094)

This dependency has been bothering folks for a long time (cc @leseb). We
really needed it due to "library client" which is primarily used for our
tests and is not a part of the Stack server. Anyone who needs to use the
library client can certainly install `llama-stack-client` in their
environment to make that work.

Updated the notebook references to install `llama-stack-client`
additionally when setting things up.

src/llama_stack/__init__.py

@@ -3,8 +3,3 @@
 #
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
-
-from llama_stack.core.library_client import (  # noqa: F401
-    AsyncLlamaStackAsLibraryClient,
-    LlamaStackAsLibraryClient,
-)

src/llama_stack/core/library_client.py

@@ -18,14 +18,21 @@ from typing import Any, TypeVar, Union, get_args, get_origin
 import httpx
 import yaml
 from fastapi import Response as FastAPIResponse
-from llama_stack_client import (
-    NOT_GIVEN,
-    APIResponse,
-    AsyncAPIResponse,
-    AsyncLlamaStackClient,
-    AsyncStream,
-    LlamaStackClient,
-)
+
+try:
+    from llama_stack_client import (
+        NOT_GIVEN,
+        APIResponse,
+        AsyncAPIResponse,
+        AsyncLlamaStackClient,
+        AsyncStream,
+        LlamaStackClient,
+    )
+except ImportError as e:
+    raise ImportError(
+        "llama-stack-client is not installed. Please install it with `uv pip install llama-stack[client]`."
+    ) from e
+
 from pydantic import BaseModel, TypeAdapter
 from rich.console import Console
 from termcolor import cprint

src/llama_stack/providers/remote/datasetio/nvidia/README.md

@@ -20,6 +20,7 @@ This provider enables dataset management using NVIDIA's NeMo Customizer service.
 Build the NVIDIA environment:
 
 ```bash
+uv pip install llama-stack-client
 uv run llama stack list-deps nvidia | xargs -L1 uv pip install
 ```
 

src/llama_stack/providers/remote/inference/nvidia/NVIDIA.md

@@ -18,6 +18,7 @@ This provider enables running inference using NVIDIA NIM.
 Build the NVIDIA environment:
 
 ```bash
+uv pip install llama-stack-client
 uv run llama stack list-deps nvidia | xargs -L1 uv pip install
 ```
 
@@ -199,4 +200,4 @@ rerank_response = client.alpha.inference.rerank(
 
 for i, result in enumerate(rerank_response):
     print(f"{i+1}. [Index: {result.index}, " f"Score: {(result.relevance_score):.3f}]")
-```
+```

src/llama_stack/providers/remote/post_training/nvidia/README.md

@@ -22,6 +22,7 @@ This provider enables fine-tuning of LLMs using NVIDIA's NeMo Customizer service
 Build the NVIDIA environment:
 
 ```bash
+uv pip install llama-stack-client
 uv run llama stack list-deps nvidia | xargs -L1 uv pip install
 ```
 

src/llama_stack/providers/remote/safety/nvidia/README.md

@@ -19,6 +19,7 @@ This provider enables safety checks and guardrails for LLM interactions using NV
 Build the NVIDIA environment:
 
 ```bash
+uv pip install llama-stack-client
 uv run llama stack list-deps nvidia | xargs -L1 uv pip install
 ```