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feat: support tool_choice = {required, none, <function>} (#1059)

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Summary:

titled


Test Plan:

added tests and

LLAMA_STACK_CONFIG=fireworks pytest -s -v tests/client-sdk/
--safety-shield meta-llama/Llama-Guard-3-8B
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ehhuang 2025-02-18 20:25:15 -08:00 • committed by GitHub
parent 37cf60b732
commit 8de7cf103b
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7 changed files with 164 additions and 41 deletions
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31
llama_stack/providers/utils/inference/prompt_adapter.py
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@ -31,6 +31,7 @@ from llama_stack.apis.inference import (
SystemMessage,
SystemMessageBehavior,
ToolChoice,
ToolDefinition,
UserMessage,
)
from llama_stack.models.llama.datatypes import (
@ -311,8 +312,6 @@ def response_format_prompt(fmt: Optional[ResponseFormat]):
def augment_messages_for_tools_llama_3_1(
request: ChatCompletionRequest,
) -> List[Message]:
assert request.tool_config.tool_choice == ToolChoice.auto, "Only `ToolChoice.auto` supported"
existing_messages = request.messages
existing_system_message = None
if existing_messages[0].role == Role.system.value:
@ -352,6 +351,10 @@ def augment_messages_for_tools_llama_3_1(
elif isinstance(existing_system_message.content, list):
sys_content += "\n".join([_process(c) for c in existing_system_message.content])
tool_choice_prompt = _get_tool_choice_prompt(request.tool_config.tool_choice, request.tools)
if tool_choice_prompt:
sys_content += "\n" + tool_choice_prompt
messages.append(SystemMessage(content=sys_content))
has_custom_tools = any(isinstance(dfn.tool_name, str) for dfn in request.tools)
@ -377,8 +380,6 @@ def augment_messages_for_tools_llama_3_1(
def augment_messages_for_tools_llama_3_2(
request: ChatCompletionRequest,
) -> List[Message]:
assert request.tool_config.tool_choice == ToolChoice.auto, "Only `ToolChoice.auto` supported"
existing_messages = request.messages
existing_system_message = None
if existing_messages[0].role == Role.system.value:
@ -386,7 +387,6 @@ def augment_messages_for_tools_llama_3_2(
assert existing_messages[0].role != Role.system.value, "Should only have 1 system message"
messages = []
sys_content = ""
custom_tools, builtin_tools = [], []
for t in request.tools:
@ -395,7 +395,6 @@ def augment_messages_for_tools_llama_3_2(
else:
builtin_tools.append(t)
tool_template = None
if builtin_tools:
tool_gen = BuiltinToolGenerator()
tool_template = tool_gen.gen(builtin_tools)
@ -423,8 +422,22 @@ def augment_messages_for_tools_llama_3_2(
):
sys_content += interleaved_content_as_str(existing_system_message.content, sep="\n")
messages.append(SystemMessage(content=sys_content.strip("\n")))
tool_choice_prompt = _get_tool_choice_prompt(request.tool_config.tool_choice, request.tools)
if tool_choice_prompt:
sys_content += "\n" + tool_choice_prompt
# Add back existing messages from the request
messages += existing_messages
messages = [SystemMessage(content=sys_content.strip("\n")), *existing_messages]
return messages
def _get_tool_choice_prompt(tool_choice: ToolChoice | str, tools: List[ToolDefinition]) -> str:
if tool_choice == ToolChoice.auto:
return ""
elif tool_choice == ToolChoice.required:
return "You MUST use one of the provided functions/tools to answer the user query."
elif tool_choice == ToolChoice.none:
# tools are already not passed in
return ""
else:
# specific tool
return f"You MUST use the tool `{tool_choice}` to answer the user query."