Add code-assistant example
Voice code assistant that dispatches questions to a Claude Agent
SDK worker. The main task runs the voice pipeline (STT + LLM + TTS)
and an `ask_code` direct function. `CodeWorker` is a bus-only
`BaseTask` spawned on the runner: it accepts `@job`-style
requests through the bus, queues them onto an asyncio queue, and
runs them sequentially through a persistent Claude SDK session so
follow-ups share context. The example shows the job-RPC surface
(`task.job("code_worker", ...)`), bus-only tasks (no pipeline),
and the `pipeline_task` field on `FunctionCallParams`.
This commit is contained in:
Aleix Conchillo Flaqué
178
examples/multi-task/code-assistant/code-assistant.py
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178
examples/multi-task/code-assistant/code-assistant.py
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#
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# Copyright (c) 2026, Daily
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#
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# SPDX-License-Identifier: BSD 2-Clause License
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#
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"""Voice code assistant powered by Claude Agent SDK.
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Talk to your codebase hands-free. Ask questions like "what does the
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auth middleware do?" or "find all TODO comments" and get spoken answers
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based on actual file contents. The Claude Agent SDK worker navigates
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the filesystem using Read, Bash, Glob, and Grep tools.
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Architecture::
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Main task (transport + LLM + ``ask_code`` tool)
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└── job → CodeWorker (Claude Agent SDK)
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Requirements:
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- ANTHROPIC_API_KEY
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- OPENAI_API_KEY
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- DEEPGRAM_API_KEY
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- CARTESIA_API_KEY
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- DAILY_API_KEY (for Daily transport)
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"""
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import os
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from code_worker import CodeWorker
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from dotenv import load_dotenv
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from loguru import logger
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from pipecat.adapters.schemas.tools_schema import ToolsSchema
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from pipecat.audio.vad.silero import SileroVADAnalyzer
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from pipecat.frames.frames import LLMMessagesAppendFrame, LLMRunFrame
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from pipecat.pipeline.pipeline import Pipeline
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from pipecat.pipeline.runner import PipelineRunner
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from pipecat.pipeline.task import PipelineParams, PipelineTask
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from pipecat.processors.aggregators.llm_context import LLMContext
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from pipecat.processors.aggregators.llm_response_universal import (
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LLMContextAggregatorPair,
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LLMUserAggregatorParams,
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)
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from pipecat.runner.types import RunnerArguments
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from pipecat.runner.utils import create_transport
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from pipecat.services.cartesia.tts import CartesiaTTSService
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from pipecat.services.deepgram.stt import DeepgramSTTService
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from pipecat.services.llm_service import FunctionCallParams
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from pipecat.services.openai.llm import OpenAILLMService
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from pipecat.transports.base_transport import BaseTransport, TransportParams
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from pipecat.transports.daily.transport import DailyParams
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load_dotenv(override=True)
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PROJECT_PATH = os.getenv("PROJECT_PATH", os.getcwd())
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transport_params = {
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"daily": lambda: DailyParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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),
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"webrtc": lambda: TransportParams(
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audio_in_enabled=True,
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audio_out_enabled=True,
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),
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}
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async def ask_code(params: FunctionCallParams, question: str):
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"""Ask a question about the codebase. A Claude Code worker will
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explore the project by reading files, searching code, and running
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commands. It remembers previous questions for follow-ups.
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Args:
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question (str): The question about code, files, structure,
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dependencies, or anything in the project.
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"""
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logger.info(f"Asking code worker: '{question}'")
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async with params.pipeline_task.job("code_worker", payload={"question": question}) as job:
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await params.llm.queue_frame(
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LLMMessagesAppendFrame(
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messages=[{"role": "developer", "content": "Give me a moment."}],
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run_llm=True,
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)
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)
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# The LLM keeps talking while the worker runs.
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await params.result_callback(job.response)
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async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
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logger.info("Starting code assistant")
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runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)
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stt = DeepgramSTTService(api_key=os.environ["DEEPGRAM_API_KEY"])
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tts = CartesiaTTSService(
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api_key=os.environ["CARTESIA_API_KEY"],
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settings=CartesiaTTSService.Settings(
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voice="9626c31c-bec5-4cca-baa8-f8ba9e84c8bc", # Jacqueline
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),
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)
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llm = OpenAILLMService(
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api_key=os.environ["OPENAI_API_KEY"],
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settings=OpenAILLMService.Settings(
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system_instruction=(
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"You are a voice interface to a code assistant powered by Claude Code. "
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"Behind you is a worker that can read files, search code with grep and "
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"glob patterns, and run bash commands on the project. It maintains "
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"context across questions, so follow-up questions work naturally.\n\n"
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"When the user asks anything about code, project structure, files, "
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"dependencies, tests, or wants to explore the codebase, call the "
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"ask_code tool. When the worker result comes back, summarize it naturally "
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"for speaking. Keep responses concise and conversational.\n"
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),
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),
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)
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llm.register_direct_function(ask_code, cancel_on_interruption=False, timeout_secs=60)
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context = LLMContext(tools=ToolsSchema(standard_tools=[ask_code]))
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aggregators = LLMContextAggregatorPair(
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context,
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user_params=LLMUserAggregatorParams(vad_analyzer=SileroVADAnalyzer()),
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)
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pipeline = Pipeline(
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[
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transport.input(),
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stt,
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aggregators.user(),
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llm,
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tts,
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transport.output(),
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aggregators.assistant(),
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]
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)
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task = PipelineTask(
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pipeline,
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params=PipelineParams(
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enable_metrics=True,
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enable_usage_metrics=True,
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),
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idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
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)
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await runner.spawn(CodeWorker("code_worker", project_path=PROJECT_PATH))
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@transport.event_handler("on_client_connected")
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async def on_client_connected(transport, client):
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logger.info("Client connected")
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context.add_message(
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{
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"role": "developer",
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"content": "Greet the user and tell them you're a code assistant.",
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}
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)
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await task.queue_frame(LLMRunFrame())
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@transport.event_handler("on_client_disconnected")
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async def on_client_disconnected(transport, client):
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logger.info("Client disconnected")
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await task.cancel()
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await runner.run(task)
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async def bot(runner_args: RunnerArguments):
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"""Main bot entry point compatible with Pipecat Cloud."""
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transport = await create_transport(runner_args, transport_params)
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await run_bot(transport, runner_args)
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if __name__ == "__main__":
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from pipecat.runner.run import main
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main()
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120
examples/multi-task/code-assistant/code_worker.py
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120
examples/multi-task/code-assistant/code_worker.py
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#
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# Copyright (c) 2026, Daily
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#
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# SPDX-License-Identifier: BSD 2-Clause License
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#
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"""Code worker that explores a codebase using Claude Agent SDK."""
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import asyncio
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from loguru import logger
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from pipecat.bus import (
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BusCancelTaskMessage,
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BusEndTaskMessage,
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BusJobRequestMessage,
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)
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from pipecat.pipeline.base_task import BaseTask
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from pipecat.pipeline.job_context import JobStatus
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try:
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from claude_agent_sdk import ClaudeAgentOptions, ClaudeSDKClient
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except ModuleNotFoundError as e:
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logger.error(f"Exception: {e}")
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logger.error("In order to use CodeWorker, you need to `pip install claude-agent-sdk`.")
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raise Exception(f"Missing module: {e}")
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class CodeWorker(BaseTask):
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"""Bus-only task that answers code questions using Claude Agent SDK.
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Maintains a persistent Claude SDK session so follow-up questions
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share context. Questions are queued and processed sequentially. The
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worker has no Pipecat pipeline — it consumes job requests from the
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bus and replies with job responses.
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"""
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def __init__(self, name: str, *, project_path: str):
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"""Initialize the CodeWorker.
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Args:
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name: Unique task name.
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project_path: Filesystem path the Claude SDK should explore.
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"""
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super().__init__(name)
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self._project_path = project_path
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self._queue: asyncio.Queue = asyncio.Queue()
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self._worker_task: asyncio.Task | None = None
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self._claude_options = ClaudeAgentOptions(
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permission_mode="bypassPermissions",
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system_prompt=(
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f"You are a code assistant. The project is at: {self._project_path}\n\n"
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"Answer the user's question by exploring the codebase. Use Read to "
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"view files, Glob to find files by pattern, and Bash to run commands "
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"like grep or find. Be thorough but concise in your answer. "
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"Focus on what the user asked. Respond with a clear, spoken-friendly "
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"summary (no markdown, no bullet points, no code blocks)."
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),
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allowed_tools=["Read", "Bash", "Glob", "Grep"],
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model="sonnet",
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max_turns=10,
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)
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async def start(self) -> None:
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"""Launch the Claude SDK worker loop alongside the standard task start."""
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await super().start()
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self._worker_task = self.create_task(self._worker_loop(), f"{self.name}::worker")
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async def stop(self) -> None:
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"""Cancel the worker loop before tearing down the task."""
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if self._worker_task:
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await self.cancel_task(self._worker_task)
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self._worker_task = None
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await super().stop()
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async def on_job_request(self, message: BusJobRequestMessage) -> None:
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"""Enqueue an incoming job for the worker loop."""
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await super().on_job_request(message)
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logger.info(f"Worker '{self.name}': queued '{message.payload['question']}'")
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self._queue.put_nowait(message)
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async def _handle_task_end(self, message: BusEndTaskMessage) -> None:
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"""Signal the run loop to finish on a graceful end."""
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await super()._handle_task_end(message)
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self._finished_event.set()
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async def _handle_task_cancel(self, message: BusCancelTaskMessage) -> None:
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"""Signal the run loop to finish on cancellation."""
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await super()._handle_task_cancel(message)
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self._finished_event.set()
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async def _worker_loop(self):
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try:
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async with ClaudeSDKClient(options=self._claude_options) as client:
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while True:
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message = await self._queue.get()
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question = message.payload["question"]
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logger.info(f"Worker '{self.name}': researching '{question}'")
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try:
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answer = ""
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await client.query(prompt=question)
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async for msg in client.receive_response():
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if type(msg).__name__ == "AssistantMessage":
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for block in msg.content:
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if type(block).__name__ == "TextBlock":
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answer += block.text
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logger.info(f"Worker '{self.name}': completed ({len(answer)} chars)")
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await self.send_job_response(message.job_id, {"answer": answer})
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except Exception as e:
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logger.error(f"Worker '{self.name}': error: {e}")
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await self.send_job_response(
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message.job_id, {"error": str(e)}, status=JobStatus.ERROR
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)
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except Exception as e:
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logger.error(f"Worker '{self.name}': failed to start Claude SDK: {e}")
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