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`.
Two LLM tasks (greeter and support) handing off to each other over
the local `AsyncQueueBus`. The main task owns the transport
pipeline (STT, TTS, transport I/O) and the child tasks each run
their own LLM behind a `BusBridgeProcessor`. Each child uses
`bridged=()` so `PipelineTask` auto-wraps its pipeline with
the bus edge processors, and `transfer_to_agent` / `end_conversation`
tools demonstrate `handoff_to(...)` and `end(...)`.
