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Xi Yan 2025-03-29 11:55:50 -07:00
parent d8a8a734b5
commit e84d3966c4
1 changed files with 101 additions and 37 deletions
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138
llama_stack/providers/inline/agents/meta_reference/agent_instance.py
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@ -38,10 +38,10 @@ from llama_stack.apis.agents import (
Turn,
)
from llama_stack.apis.common.content_types import (
URL,
TextContentItem,
ToolCallDelta,
ToolCallParseStatus,
URL,
)
from llama_stack.apis.inference import (
ChatCompletionResponseEventType,
@ -57,11 +57,7 @@ from llama_stack.apis.inference import (
UserMessage,
)
from llama_stack.apis.safety import Safety
from llama_stack.apis.tools import (
ToolGroups,
ToolInvocationResult,
ToolRuntime,
)
from llama_stack.apis.tools import ToolGroups, ToolInvocationResult, ToolRuntime
from llama_stack.apis.vector_io import VectorIO
from llama_stack.log import get_logger
from llama_stack.models.llama.datatypes import (
@ -77,7 +73,9 @@ from .safety import SafetyException, ShieldRunnerMixin
def make_random_string(length: int = 8):
return "".join(secrets.choice(string.ascii_letters + string.digits) for _ in range(length))
return "".join(
secrets.choice(string.ascii_letters + string.digits) for _ in range(length)
)
TOOLS_ATTACHMENT_KEY_REGEX = re.compile(r"__tools_attachment__=(\{.*?\})")
@ -176,7 +174,9 @@ class ChatAgent(ShieldRunnerMixin):
messages.extend(self.turn_to_messages(turn))
return messages
async def create_and_execute_turn(self, request: AgentTurnCreateRequest) -> AsyncGenerator:
async def create_and_execute_turn(
self, request: AgentTurnCreateRequest
) -> AsyncGenerator:
span = tracing.get_current_span()
if span:
span.set_attribute("session_id", request.session_id)
@ -221,13 +221,16 @@ class ChatAgent(ShieldRunnerMixin):
messages = await self.get_messages_from_turns(turns)
if is_resume:
tool_response_messages = [
ToolResponseMessage(call_id=x.call_id, content=x.content) for x in request.tool_responses
ToolResponseMessage(call_id=x.call_id, content=x.content)
for x in request.tool_responses
]
messages.extend(tool_response_messages)
last_turn = turns[-1]
last_turn_messages = self.turn_to_messages(last_turn)
last_turn_messages = [
x for x in last_turn_messages if isinstance(x, UserMessage) or isinstance(x, ToolResponseMessage)
x
for x in last_turn_messages
if isinstance(x, UserMessage) or isinstance(x, ToolResponseMessage)
]
last_turn_messages.extend(tool_response_messages)
@ -237,17 +240,31 @@ class ChatAgent(ShieldRunnerMixin):
# mark tool execution step as complete
# if there's no tool execution in progress step (due to storage, or tool call parsing on client),
# we'll create a new tool execution step with current time
in_progress_tool_call_step = await self.storage.get_in_progress_tool_call_step(
request.session_id, request.turn_id
in_progress_tool_call_step = (
await self.storage.get_in_progress_tool_call_step(
request.session_id, request.turn_id
)
)
now = datetime.now(timezone.utc).isoformat()
tool_execution_step = ToolExecutionStep(
step_id=(in_progress_tool_call_step.step_id if in_progress_tool_call_step else str(uuid.uuid4())),
step_id=(
in_progress_tool_call_step.step_id
if in_progress_tool_call_step
else str(uuid.uuid4())
),
turn_id=request.turn_id,
tool_calls=(in_progress_tool_call_step.tool_calls if in_progress_tool_call_step else []),
tool_calls=(
in_progress_tool_call_step.tool_calls
if in_progress_tool_call_step
else []
),
tool_responses=request.tool_responses,
completed_at=now,
started_at=(in_progress_tool_call_step.started_at if in_progress_tool_call_step else now),
started_at=(
in_progress_tool_call_step.started_at
if in_progress_tool_call_step
else now
),
)
steps.append(tool_execution_step)
yield AgentTurnResponseStreamChunk(
@ -281,9 +298,14 @@ class ChatAgent(ShieldRunnerMixin):
output_message = chunk
continue
assert isinstance(chunk, AgentTurnResponseStreamChunk), f"Unexpected type {type(chunk)}"
assert isinstance(
chunk, AgentTurnResponseStreamChunk
), f"Unexpected type {type(chunk)}"
event = chunk.event
if event.payload.event_type == AgentTurnResponseEventType.step_complete.value:
if (
event.payload.event_type
== AgentTurnResponseEventType.step_complete.value
):
steps.append(event.payload.step_details)
yield chunk
@ -459,7 +481,7 @@ class ChatAgent(ShieldRunnerMixin):
contexts.append(raw_document_text)
attached_context = "\n".join(contexts)
input_messages[-1].context = attached_context
input_messages[-1].content += attached_context
session_info = await self.storage.get_session_info(session_id)
# if the session has a memory bank id, let the memory tool use it
@ -467,13 +489,19 @@ class ChatAgent(ShieldRunnerMixin):
for tool_name in self.tool_name_to_args.keys():
if tool_name == MEMORY_QUERY_TOOL:
if "vector_db_ids" not in self.tool_name_to_args[tool_name]:
self.tool_name_to_args[tool_name]["vector_db_ids"] = [session_info.vector_db_id]
self.tool_name_to_args[tool_name]["vector_db_ids"] = [
session_info.vector_db_id
]
else:
self.tool_name_to_args[tool_name]["vector_db_ids"].append(session_info.vector_db_id)
self.tool_name_to_args[tool_name]["vector_db_ids"].append(
session_info.vector_db_id
)
output_attachments = []
n_iter = await self.storage.get_num_infer_iters_in_turn(session_id, turn_id) or 0
n_iter = (
await self.storage.get_num_infer_iters_in_turn(session_id, turn_id) or 0
)
# Build a map of custom tools to their definitions for faster lookup
client_tools = {}
@ -551,12 +579,16 @@ class ChatAgent(ShieldRunnerMixin):
span.set_attribute("stop_reason", stop_reason)
span.set_attribute(
"input",
json.dumps([json.loads(m.model_dump_json()) for m in input_messages]),
json.dumps(
[json.loads(m.model_dump_json()) for m in input_messages]
),
)
output_attr = json.dumps(
{
"content": content,
"tool_calls": [json.loads(t.model_dump_json()) for t in tool_calls],
"tool_calls": [
json.loads(t.model_dump_json()) for t in tool_calls
],
}
)
span.set_attribute("output", output_attr)
@ -620,7 +652,9 @@ class ChatAgent(ShieldRunnerMixin):
message.content = [message.content] + output_attachments
yield message
else:
logger.debug(f"completion message with EOM (iter: {n_iter}): {str(message)}")
logger.debug(
f"completion message with EOM (iter: {n_iter}): {str(message)}"
)
input_messages = input_messages + [message]
else:
input_messages = input_messages + [message]
@ -669,7 +703,9 @@ class ChatAgent(ShieldRunnerMixin):
"input": message.model_dump_json(),
},
) as span:
tool_execution_start_time = datetime.now(timezone.utc).isoformat()
tool_execution_start_time = datetime.now(
timezone.utc
).isoformat()
tool_result = await self.execute_tool_call_maybe(
session_id,
tool_call,
@ -718,7 +754,9 @@ class ChatAgent(ShieldRunnerMixin):
# TODO: add tool-input touchpoint and a "start" event for this step also
# but that needs a lot more refactoring of Tool code potentially
if (type(result_message.content) is str) and (
out_attachment := _interpret_content_as_attachment(result_message.content)
out_attachment := _interpret_content_as_attachment(
result_message.content
)
):
# NOTE: when we push this message back to the model, the model may ignore the
# attached file path etc. since the model is trained to only provide a user message
@ -755,16 +793,24 @@ class ChatAgent(ShieldRunnerMixin):
toolgroups_for_turn: Optional[List[AgentToolGroup]] = None,
) -> None:
toolgroup_to_args = {}
for toolgroup in (self.agent_config.toolgroups or []) + (toolgroups_for_turn or []):
for toolgroup in (self.agent_config.toolgroups or []) + (
toolgroups_for_turn or []
):
if isinstance(toolgroup, AgentToolGroupWithArgs):
tool_group_name, _ = self._parse_toolgroup_name(toolgroup.name)
toolgroup_to_args[tool_group_name] = toolgroup.args
# Determine which tools to include
tool_groups_to_include = toolgroups_for_turn or self.agent_config.toolgroups or []
tool_groups_to_include = (
toolgroups_for_turn or self.agent_config.toolgroups or []
)
agent_config_toolgroups = []
for toolgroup in tool_groups_to_include:
name = toolgroup.name if isinstance(toolgroup, AgentToolGroupWithArgs) else toolgroup
name = (
toolgroup.name
if isinstance(toolgroup, AgentToolGroupWithArgs)
else toolgroup
)
if name not in agent_config_toolgroups:
agent_config_toolgroups.append(name)
@ -790,20 +836,32 @@ class ChatAgent(ShieldRunnerMixin):
},
)
for toolgroup_name_with_maybe_tool_name in agent_config_toolgroups:
toolgroup_name, input_tool_name = self._parse_toolgroup_name(toolgroup_name_with_maybe_tool_name)
toolgroup_name, input_tool_name = self._parse_toolgroup_name(
toolgroup_name_with_maybe_tool_name
)
tools = await self.tool_groups_api.list_tools(toolgroup_id=toolgroup_name)
if not tools.data:
available_tool_groups = ", ".join(
[t.identifier for t in (await self.tool_groups_api.list_tool_groups()).data]
[
t.identifier
for t in (await self.tool_groups_api.list_tool_groups()).data
]
)
raise ValueError(f"Toolgroup {toolgroup_name} not found, available toolgroups: {available_tool_groups}")
if input_tool_name is not None and not any(tool.identifier == input_tool_name for tool in tools.data):
raise ValueError(
f"Toolgroup {toolgroup_name} not found, available toolgroups: {available_tool_groups}"
)
if input_tool_name is not None and not any(
tool.identifier == input_tool_name for tool in tools.data
):
raise ValueError(
f"Tool {input_tool_name} not found in toolgroup {toolgroup_name}. Available tools: {', '.join([tool.identifier for tool in tools.data])}"
)
for tool_def in tools.data:
if toolgroup_name.startswith("builtin") and toolgroup_name != RAG_TOOL_GROUP:
if (
toolgroup_name.startswith("builtin")
and toolgroup_name != RAG_TOOL_GROUP
):
identifier: str | BuiltinTool | None = tool_def.identifier
if identifier == "web_search":
identifier = BuiltinTool.brave_search
@ -832,14 +890,18 @@ class ChatAgent(ShieldRunnerMixin):
for param in tool_def.parameters
},
)
tool_name_to_args[tool_def.identifier] = toolgroup_to_args.get(toolgroup_name, {})
tool_name_to_args[tool_def.identifier] = toolgroup_to_args.get(
toolgroup_name, {}
)
self.tool_defs, self.tool_name_to_args = (
list(tool_name_to_def.values()),
tool_name_to_args,
)
def _parse_toolgroup_name(self, toolgroup_name_with_maybe_tool_name: str) -> tuple[str, Optional[str]]:
def _parse_toolgroup_name(
self, toolgroup_name_with_maybe_tool_name: str
) -> tuple[str, Optional[str]]:
"""Parse a toolgroup name into its components.
Args:
@ -875,7 +937,9 @@ class ChatAgent(ShieldRunnerMixin):
else:
tool_name_str = tool_name
logger.info(f"executing tool call: {tool_name_str} with args: {tool_call.arguments}")
logger.info(
f"executing tool call: {tool_name_str} with args: {tool_call.arguments}"
)
result = await self.tool_runtime_api.invoke_tool(
tool_name=tool_name_str,
kwargs={