From 950fc10f054e99e7ef257750199b495bbe482a5a Mon Sep 17 00:00:00 2001
From: Mark Backman <mark@daily.co>
Date: Thu, 21 May 2026 17:21:08 -0400
Subject: [PATCH] Add document-review UIWorker example

Synthesis example: a ReplyToolMixin UIWorker adds a start_review tool that fans
out to clarity/tone peers via start_user_job_group, translates each reviewer
response into an add_note command in on_job_response, handles a client
note_click event via @on_ui_event, and keeps history across turns.
---
 .../ui-worker/document-review/README.md       |  119 ++
 .../ui-worker/document-review/bot.py          |  509 ++++++++
 .../document-review/client/.gitignore         |   26 +
 .../document-review/client/index.html         |  102 ++
 .../ui-worker/document-review/client/main.js  |  475 +++++++
 .../document-review/client/package-lock.json  | 1128 +++++++++++++++++
 .../document-review/client/package.json       |   18 +
 .../document-review/client/styles.css         |  406 ++++++
 .../document-review/client/vite.config.js     |    7 +
 9 files changed, 2790 insertions(+)
 create mode 100644 examples/multi-worker/ui-worker/document-review/README.md
 create mode 100644 examples/multi-worker/ui-worker/document-review/bot.py
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/.gitignore
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/index.html
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/main.js
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/package-lock.json
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/package.json
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/styles.css
 create mode 100644 examples/multi-worker/ui-worker/document-review/client/vite.config.js

diff --git a/examples/multi-worker/ui-worker/document-review/README.md b/examples/multi-worker/ui-worker/document-review/README.md
new file mode 100644
index 000000000..300bd83f3
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/README.md
@@ -0,0 +1,119 @@
+# document-review
+
+The synthesis demo. A voice-driven workspace where the user reviews a
+draft article — combining the patterns from every prior demo into one
+application: snapshot reading, deixis (read + write), form-fill
+state-changing actions, async job-group fan-out with progress streaming,
+plus one custom command and one client-emitted event.
+
+## What it shows
+
+- **Read-side deixis**: select a paragraph, ask "review this", and the
+  worker grounds in the selected text.
+- **Async fan-out**: a paragraph review spawns two peer workers (clarity
+  + tone) in parallel via `start_user_job_group`. The in-flight card
+  streams each worker's progress.
+- **Custom UI command**: as each worker completes, `on_job_response`
+  emits an `add_note` command with the worker's feedback; the client
+  renders a note attached to the reviewed paragraph.
+- **State-changing actions**: dictating a note fills the textarea and
+  clicks Save (`fills` + `click` from the bundled `reply` tool).
+- **Write-side deixis**: "where does it talk about rhythms?" → the worker
+  finds the paragraph and uses `select_text` to put the page selection
+  on it.
+- **Client-emitted UI event**: clicking a note sends a `note_click` event
+  back; the worker's `@on_ui_event("note_click")` handler dispatches
+  `select_text` to jump to the paragraph. The round-trip event/command
+  pattern.
+- **Two LLM tools coexisting**: `ReplyToolMixin`'s `reply` handles normal
+  turns; a custom `start_review` tool handles review kick-off. The prompt
+  steers the model to pick one (single tool call per turn).
+- **`on_job_response` interception**: the worker overrides this hook to
+  translate reviewer responses into `add_note` commands — the peers don't
+  know they're driving a UI; the worker mediates.
+
+## What's new vs. the prior demos
+
+| Prior demo | Pattern |
+|---|---|
+| hello-snapshot | snapshot streaming, voice/UI delegation |
+| pointing | scroll + multi-highlight |
+| deixis | bidirectional text selection |
+| form-fill | fills + click |
+| async-tasks | job-group fan-out + cancel |
+
+This one stitches all five together, plus the two patterns no prior demo
+touched: a **custom UI command** (`add_note`) and a **custom
+client-emitted event** (`note_click`).
+
+## Run
+
+Two terminals.
+
+**Terminal 1 — bot:**
+
+```bash
+cd examples/multi-worker/ui-worker/document-review
+uv run python bot.py
+```
+
+The bot starts on `http://localhost:7860`.
+
+**Terminal 2 — client:**
+
+```bash
+cd examples/multi-worker/ui-worker/document-review/client
+npm install            # one-time
+npm run dev
+```
+
+Open `http://localhost:5173` and click **Connect**.
+
+## What to try
+
+The article is a 6-paragraph draft seeded with one too-dense paragraph,
+one too-vague one, and one with absolutist tone problems.
+
+**Review flow (the centerpiece):**
+
+- Select the run-on paragraph, say _"review this."_ — the worker
+  acknowledges, the in-flight card appears, both reviewers tick through
+  progress, and two notes attach to the paragraph (clarity flags the
+  density).
+- Select the absolutist paragraph, say _"give me feedback."_ — tone
+  flags the strong words.
+
+**Notes flow:**
+
+- _"Add a note that this paragraph is too jargony."_ (with a paragraph
+  selected) — the worker fills the textarea and clicks Save.
+- Click any note in the panel — the page scrolls and selects the
+  paragraph it was attached to.
+
+**Navigation:**
+
+- _"Where does it talk about structured rhythms?"_ — the worker jumps to
+  the paragraph by selecting it.
+
+**Cancellation:**
+
+- During a review, click Cancel on the in-flight card. The reviewers'
+  responses come back as `cancelled`; feedback that already arrived stays
+  as a note.
+
+## Requirements
+
+- `OPENAI_API_KEY`
+- `DEEPGRAM_API_KEY`
+- `CARTESIA_API_KEY`
+
+A `.env` in the example folder is the easiest way to set these (see
+`examples/multi-worker/env.example`).
+
+## What this example does _not_ show
+
+Real worker integrations (the reviewers compute simple text metrics — for
+real LLM reviewers, swap them for `LLMWorker` subclasses whose
+`on_job_request` runs the LLM with the paragraph text and a critique
+prompt; everything else stays the same), note persistence, or
+multi-document / multi-page flows.
diff --git a/examples/multi-worker/ui-worker/document-review/bot.py b/examples/multi-worker/ui-worker/document-review/bot.py
new file mode 100644
index 000000000..74d1e4069
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/bot.py
@@ -0,0 +1,509 @@
+#
+# Copyright (c) 2026, Daily
+#
+# SPDX-License-Identifier: BSD 2-Clause License
+#
+
+"""Document review — the synthesis demo.
+
+A single workspace combining everything from the prior demos. The user
+reviews a draft article. They can:
+
+- Select a paragraph and ask for review. The UIWorker fans out to two
+  peer reviewers (clarity, tone) in parallel. Their progress streams to
+  an in-flight card, and each worker's feedback becomes a note attached
+  to the paragraph (a custom ``add_note`` command).
+- Dictate their own notes by voice. The worker fills the notes textarea
+  and clicks Save (``fills`` + ``click`` via the bundled ``reply`` tool).
+- Ask "where does it talk about X" and the worker uses ``select_text`` to
+  navigate.
+- Click an existing note; the client emits a ``note_click`` UI event, and
+  the worker's ``@on_ui_event("note_click")`` handler jumps to the related
+  paragraph — the round-trip event/command pattern.
+
+Architecture::
+
+    Main worker (PipelineWorker, owns transport + RTVI):
+      transport.in → STT → user_agg → LLM → TTS → transport.out → assistant_agg
+        └── answer_about_screen(query) tool
+              └── params.pipeline_worker.job("ui", name="respond", payload={query})
+
+    ReviewWorker (ReplyToolMixin + UIWorker, keep_history=True):
+      ├── inherited reply (scroll_to, highlight, select_text, fills, click)
+      ├── @tool start_review(answer, paragraph_ref, paragraph_text)
+      │     └── start_user_job_group("clarity", "tone", ...)
+      ├── @on_ui_event("note_click") → select_text(ref)
+      └── on_job_response → emit add_note for each reviewer that completes
+
+    Two peer workers (BaseWorker each):
+      ClarityReviewer · ToneReviewer
+
+The reviewers are simulated, like async-tasks: a few ``send_job_update``
+progress lines, then a ``send_job_response`` with a final analysis
+computed from simple text metrics (word/sentence counts, absolutist /
+hedging words) so different paragraphs get different feedback without
+real NLP.
+
+Run::
+
+    uv run python bot.py
+
+Then open the client at ``http://localhost:5173`` (see ``README.md``).
+
+Requirements:
+
+- OPENAI_API_KEY
+- DEEPGRAM_API_KEY
+- CARTESIA_API_KEY
+"""
+
+import asyncio
+import os
+import random
+
+from dotenv import load_dotenv
+from loguru import logger
+
+from pipecat.adapters.schemas.tools_schema import ToolsSchema
+from pipecat.audio.vad.silero import SileroVADAnalyzer
+from pipecat.bus.messages import BusJobRequestMessage, BusJobResponseMessage
+from pipecat.frames.frames import LLMRunFrame
+from pipecat.pipeline.base_worker import BaseWorker
+from pipecat.pipeline.job_context import JobError, JobStatus
+from pipecat.pipeline.pipeline import Pipeline
+from pipecat.pipeline.runner import PipelineRunner
+from pipecat.pipeline.worker import PipelineParams, PipelineWorker
+from pipecat.processors.aggregators.llm_context import LLMContext
+from pipecat.processors.aggregators.llm_response_universal import (
+    LLMContextAggregatorPair,
+    LLMUserAggregatorParams,
+)
+from pipecat.runner.types import RunnerArguments
+from pipecat.runner.utils import create_transport
+from pipecat.services.cartesia.tts import CartesiaTTSService
+from pipecat.services.deepgram.stt import DeepgramSTTService
+from pipecat.services.llm_service import FunctionCallParams
+from pipecat.services.openai.llm import OpenAILLMService
+from pipecat.transports.base_transport import BaseTransport, TransportParams
+from pipecat.transports.daily.transport import DailyParams
+from pipecat.workers.llm import tool
+from pipecat.workers.ui import ReplyToolMixin, UIWorker, on_ui_event
+
+load_dotenv(override=True)
+
+MAIN_NAME = "main"
+
+transport_params = {
+    "daily": lambda: DailyParams(audio_in_enabled=True, audio_out_enabled=True),
+    "webrtc": lambda: TransportParams(audio_in_enabled=True, audio_out_enabled=True),
+}
+
+
+VOICE_PROMPT = """\
+You are the voice layer of a document review assistant. A separate \
+UI layer sees the page (the article and the notes panel) and writes \
+the spoken reply.
+
+For every user utterance about the document or the review (selecting \
+paragraphs, asking for feedback, dictating notes, navigating), call \
+``answer_about_screen`` with the user's request verbatim. The \
+tool's response is the spoken reply, already TTS-ready.
+
+Only respond directly for pure pleasantries (greetings, thanks, \
+goodbyes). Keep direct replies to one short spoken sentence."""
+
+
+# The UI wire-format guide (UI_STATE_PROMPT_GUIDE) is appended to the LLM's
+# system instruction automatically by UIWorker, so this prompt only needs the
+# app-specific behavior.
+UI_PROMPT = """\
+You are reviewing a draft article with the user. The current \
+``<ui_state>`` block is in your context, and may contain a \
+``<selection>`` block when the user has highlighted text.
+
+## The hard rule
+
+**Every turn MUST call exactly one tool: either ``reply`` or \
+``start_review``.** Never respond with plain text. If the user \
+asks something that doesn't need a visual action — including \
+open questions like "how can we improve it?", "what do you think?", \
+"any suggestions?" — call ``reply`` with the answer in the \
+``answer`` field. The spoken response is whatever you put there. \
+If you forget to call a tool, the user hears nothing and the turn \
+times out.
+
+You have two LLM tools:
+
+## Tool: reply
+
+For most turns. ``reply(answer, scroll_to=None, highlight=None, \
+select_text=None, fills=None, click=None)``:
+
+- ``answer`` (REQUIRED): the spoken reply, plain language, one or \
+two short sentences.
+- ``scroll_to`` (OPTIONAL): a snapshot ref. Scroll the element into \
+view.
+- ``select_text`` (OPTIONAL): a snapshot ref. Place the page's text \
+selection on a paragraph (use this for "this paragraph" / "the \
+section about X").
+- ``highlight`` (OPTIONAL): list of refs. Brief flash. Rarely used \
+here; ``select_text`` is usually better for paragraphs.
+- ``fills`` (OPTIONAL): list of ``{"ref", "value"}`` objects. Fill \
+the notes textarea (ref is in ``<ui_state>`` as the ``textbox``).
+- ``click`` (OPTIONAL): list of refs to click. Use to click the \
+Save button after filling the notes textarea.
+
+## Tool: start_review
+
+For "review this paragraph" / "give me feedback on this" requests. \
+``start_review(answer, paragraph_ref, paragraph_text)``:
+
+- ``answer`` (REQUIRED): brief acknowledgement spoken right away \
+("Reviewing this paragraph").
+- ``paragraph_ref`` (REQUIRED): the snapshot ref of the paragraph \
+under review. When the user has a selection, use the selection's \
+ref. Otherwise pick the right paragraph from ``<ui_state>``.
+- ``paragraph_text`` (REQUIRED): the full paragraph text. Read it \
+from the ``<selection>`` block when present, or from the ``name`` \
+attribute on the paragraph node in ``<ui_state>``.
+
+The server fans out two worker reviewers (clarity, tone) in \
+parallel and streams progress to the page. As each worker finishes, \
+their feedback becomes a note attached to the paragraph. You do NOT \
+wait for results.
+
+## Decision rules
+
+- **"Review this", "give me feedback on this paragraph", "what do \
+you think of this"** with a selection → ``start_review``.
+- **"Review the third paragraph"** with no selection → use \
+``<ui_state>`` to find the ref + text, call ``start_review``.
+- **"Add a note: …"** or any dictated note content → use ``reply`` \
+with ``fills`` for the notes textarea and ``click`` on the Save \
+button. The note will automatically attach to whichever article \
+paragraph the user last selected.
+- **"Where does it talk about X"** → ``reply`` with ``scroll_to`` + \
+``select_text`` to navigate to the matching paragraph.
+- **"Read me back the notes"** / **"What did you say about \
+paragraph 3"** → ``reply`` with answer text only; the notes panel \
+is in ``<ui_state>`` so you can summarize from it.
+- **General questions about the draft** ("how can we improve it?", \
+"what do you think?", "any suggestions?", "what's missing?") → \
+``reply`` with the answer text only. Put your suggestions / \
+opinions / analysis directly in the ``answer`` field; that becomes \
+the spoken reply.
+
+## Examples
+
+(refs are illustrative; use actual refs from the current snapshot)
+
+- User has selected paragraph e8, says "Review this." → \
+``start_review(answer="Reviewing this paragraph.", paragraph_ref="e8", paragraph_text="The asynchronous-first model that emerged...")``
+- "Add a note that this is too dense" with paragraph e8 selected → \
+``reply(answer="Noted.", fills=[{"ref": "<textarea_ref>", "value": "This paragraph is too dense."}], click=["<save_button_ref>"])``
+- "Where does it talk about rhythms?" → \
+``reply(answer="Here, in this paragraph.", scroll_to="e14", select_text="e14")``"""
+
+
+# ─────────────────────────────────────────────────────────────────────
+# Peer workers: simulated reviewers that compute simple text metrics and
+# send back a plausible-sounding review. The analysis is canned but
+# varies per paragraph based on actual properties of the text.
+# ─────────────────────────────────────────────────────────────────────
+
+
+class _SimulatedReviewer(BaseWorker):
+    """Base for the two simulated reviewers."""
+
+    source_name: str = "reviewer"
+
+    def review(self, text: str) -> str:
+        return ""
+
+    async def on_job_request(self, message: BusJobRequestMessage) -> None:
+        await super().on_job_request(message)
+        job_id = message.job_id
+        text = str((message.payload or {}).get("text", "")).strip()
+        try:
+            await asyncio.sleep(random.uniform(0.4, 0.9))
+            await self.send_job_update(job_id, {"text": f"reading {len(text.split())} words"})
+
+            await asyncio.sleep(random.uniform(0.5, 1.1))
+            await self.send_job_update(job_id, {"text": f"checking {self.source_name}"})
+
+            await asyncio.sleep(random.uniform(0.4, 0.9))
+            feedback = self.review(text) or "(no notes)"
+            await self.send_job_response(job_id, response={"feedback": feedback})
+        except asyncio.CancelledError:
+            raise
+
+
+class ClarityReviewer(_SimulatedReviewer):
+    """Comments on density, sentence length, and structural issues."""
+
+    source_name = "clarity"
+
+    def review(self, text: str) -> str:
+        words = len(text.split())
+        # Cheap sentence count: terminal punctuation.
+        sentences = max(1, sum(1 for ch in text if ch in ".!?"))
+        avg = words / sentences
+
+        if avg > 35:
+            return (
+                f"This passage runs {words} words across just {sentences} "
+                f"sentence(s) (~{avg:.0f} words each). Consider breaking "
+                "it into smaller units; the reader is asked to hold a lot "
+                "in working memory."
+            )
+        if words < 25:
+            return (
+                f"Brief at {words} words. If this is a key idea, consider "
+                "expanding with one concrete example."
+            )
+        if avg < 12:
+            return (
+                f"Sentences average {avg:.0f} words. This is fine, "
+                "sometimes preferable, but watch for choppiness if "
+                "several short ones run in a row."
+            )
+        return (
+            f"Density is reasonable at ~{avg:.0f} words per sentence across {sentences} sentences."
+        )
+
+
+class ToneReviewer(_SimulatedReviewer):
+    """Comments on hedging, overstatement, and word choice."""
+
+    source_name = "tone"
+
+    ABSOLUTIST = (
+        "simply",
+        "anyone who",
+        "unanimous",
+        "always",
+        "never",
+        "obviously",
+        "comprehensively",
+    )
+    HEDGES = ("might", "perhaps", "seems", "appears", "could", "may")
+
+    def review(self, text: str) -> str:
+        lower = text.lower()
+        absolutes = [w for w in self.ABSOLUTIST if w in lower]
+        hedges = [w for w in self.HEDGES if w in lower]
+
+        if absolutes:
+            sample = ", ".join(repr(w) for w in absolutes[:3])
+            return (
+                f"Strong words flagged: {sample}. If the claim is contested "
+                "or the evidence is mixed, some hedging would read as more "
+                "credible."
+            )
+        if len(hedges) >= 4:
+            return (
+                f"Heavy hedging — I count {len(hedges)} hedge words. Fine "
+                "for an exploratory section, but if you mean to commit to "
+                "a claim, the hedges weaken it."
+            )
+        return "Tone reads as measured. No flags."
+
+
+# ─────────────────────────────────────────────────────────────────────
+# Review UI worker.
+# ─────────────────────────────────────────────────────────────────────
+
+
+class ReviewWorker(ReplyToolMixin, UIWorker):
+    """UIWorker that drives the document review workspace.
+
+    Composes ``ReplyToolMixin`` for the bundled reply tool and adds a
+    ``start_review`` tool for kicking off paragraph review. A
+    ``@on_ui_event("note_click")`` handler converts client-side note
+    clicks into ``select_text`` navigation. ``on_job_response`` is
+    overridden to translate each reviewer's response into an ``add_note``
+    UI command so feedback shows up in the notes panel as it lands.
+
+    ``keep_history=True`` so the worker can resolve deixis like "can we
+    add a note for that?" against its own prior replies.
+    """
+
+    def __init__(self):
+        llm = OpenAILLMService(
+            api_key=os.environ["OPENAI_API_KEY"],
+            settings=OpenAILLMService.Settings(system_instruction=UI_PROMPT),
+        )
+        super().__init__("ui", llm=llm, keep_history=True)
+        # job_id -> {"paragraph_ref": "..."}; lets on_job_response know
+        # which paragraph a reviewer's feedback belongs to.
+        self._reviews: dict[str, dict] = {}
+
+    @tool
+    async def start_review(
+        self,
+        params: FunctionCallParams,
+        answer: str,
+        paragraph_ref: str,
+        paragraph_text: str,
+    ):
+        """Kick off a parallel review of one paragraph.
+
+        Spawns the clarity and tone workers via ``start_user_job_group``.
+        Workers run in the background; their progress is forwarded to the
+        page automatically. As each completes, ``on_job_response``
+        translates the response into an ``add_note`` UI command.
+
+        Args:
+            answer: A short spoken acknowledgement ("Reviewing this
+                paragraph").
+            paragraph_ref: The snapshot ref of the paragraph under
+                review.
+            paragraph_text: The paragraph's text content. Workers analyze
+                this directly.
+        """
+        logger.info(f"{self}: start_review(ref={paragraph_ref!r})")
+        job_id = await self.start_user_job_group(
+            "clarity",
+            "tone",
+            payload={"ref": paragraph_ref, "text": paragraph_text},
+            label=f"Reviewing ¶ {paragraph_ref}",
+        )
+        # Remember which paragraph this review is for so we can attach
+        # each worker's response to the right note.
+        self._reviews[job_id] = {"paragraph_ref": paragraph_ref}
+        await self.respond_to_job(speak=answer)
+        await params.result_callback(None)
+
+    async def on_job_response(self, message: BusJobResponseMessage) -> None:
+        """Turn reviewer responses into ``add_note`` UI commands."""
+        await super().on_job_response(message)
+        review = self._reviews.get(message.job_id)
+        if not review:
+            return
+        if message.status != JobStatus.COMPLETED:
+            return
+        feedback = ((message.response or {}).get("feedback") or "").strip()
+        if not feedback:
+            return
+        await self.send_command(
+            "add_note",
+            {
+                "source": message.source,
+                "ref": review["paragraph_ref"],
+                "text": feedback,
+            },
+        )
+
+    @on_ui_event("note_click")
+    async def on_note_click(self, message) -> None:
+        """User clicked a note in the panel; jump to its paragraph."""
+        ref = (message.payload or {}).get("ref")
+        if not isinstance(ref, str) or not ref:
+            return
+        logger.info(f"{self}: note_click → select_text({ref!r})")
+        await self.scroll_to(ref)
+        await self.select_text(ref)
+
+
+async def answer_about_screen(params: FunctionCallParams, query: str):
+    """Forward the user's request to the screen-aware review worker.
+
+    Args:
+        query (str): The user's request, passed verbatim.
+    """
+    logger.info(f"answer_about_screen('{query}')")
+    try:
+        async with params.pipeline_worker.job(
+            "ui", name="respond", payload={"query": query}, timeout=10
+        ) as t:
+            pass
+    except JobError as e:
+        logger.warning(f"ui job failed: {e}")
+        await params.result_callback("Something went wrong on my side.")
+        return
+
+    speak = (t.response or {}).get("speak")
+    await params.result_callback(speak or "I'm not sure how to answer that.")
+
+
+async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
+    logger.info("Starting document-review bot")
+
+    runner = PipelineRunner(handle_sigint=runner_args.handle_sigint)
+
+    stt = DeepgramSTTService(api_key=os.environ["DEEPGRAM_API_KEY"])
+    tts = CartesiaTTSService(
+        api_key=os.environ["CARTESIA_API_KEY"],
+        settings=CartesiaTTSService.Settings(
+            voice=os.getenv("CARTESIA_VOICE_ID", "71a7ad14-091c-4e8e-a314-022ece01c121"),
+        ),
+    )
+    llm = OpenAILLMService(
+        api_key=os.environ["OPENAI_API_KEY"],
+        settings=OpenAILLMService.Settings(system_instruction=VOICE_PROMPT),
+    )
+    llm.register_direct_function(answer_about_screen, cancel_on_interruption=False, timeout_secs=30)
+
+    context = LLMContext(tools=ToolsSchema(standard_tools=[answer_about_screen]))
+    aggregators = LLMContextAggregatorPair(
+        context,
+        user_params=LLMUserAggregatorParams(vad_analyzer=SileroVADAnalyzer()),
+    )
+
+    pipeline = Pipeline(
+        [
+            transport.input(),
+            stt,
+            aggregators.user(),
+            llm,
+            tts,
+            transport.output(),
+            aggregators.assistant(),
+        ]
+    )
+
+    worker = PipelineWorker(
+        pipeline,
+        name=MAIN_NAME,
+        params=PipelineParams(enable_metrics=True, enable_usage_metrics=True),
+        idle_timeout_secs=runner_args.pipeline_idle_timeout_secs,
+    )
+
+    @transport.event_handler("on_client_connected")
+    async def on_client_connected(transport, client):
+        logger.info("Client connected")
+        context.add_message(
+            {
+                "role": "developer",
+                "content": (
+                    "Greet the user briefly. Tell them they can select any "
+                    "paragraph and ask you to review it, dictate notes, or "
+                    "navigate the draft. One short sentence."
+                ),
+            }
+        )
+        await worker.queue_frame(LLMRunFrame())
+
+    @transport.event_handler("on_client_disconnected")
+    async def on_client_disconnected(transport, client):
+        logger.info("Client disconnected")
+        await runner.cancel()
+
+    await runner.launch_worker(ReviewWorker())
+    await runner.launch_worker(ClarityReviewer("clarity"))
+    await runner.launch_worker(ToneReviewer("tone"))
+    await runner.launch_worker(worker)
+
+    await runner.run()
+
+
+async def bot(runner_args: RunnerArguments):
+    """Main bot entry point compatible with Pipecat Cloud."""
+    transport = await create_transport(runner_args, transport_params)
+    await run_bot(transport, runner_args)
+
+
+if __name__ == "__main__":
+    from pipecat.runner.run import main
+
+    main()
diff --git a/examples/multi-worker/ui-worker/document-review/client/.gitignore b/examples/multi-worker/ui-worker/document-review/client/.gitignore
new file mode 100644
index 000000000..503bb516c
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/.gitignore
@@ -0,0 +1,26 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+.vite
diff --git a/examples/multi-worker/ui-worker/document-review/client/index.html b/examples/multi-worker/ui-worker/document-review/client/index.html
new file mode 100644
index 000000000..7c31afa6a
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/index.html
@@ -0,0 +1,102 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Document review — UIAgent demo</title>
+    <link rel="stylesheet" href="./styles.css" />
+  </head>
+  <body>
+    <header>
+      <h1>Manuscript review</h1>
+      <button id="connect" type="button">Connect</button>
+    </header>
+
+    <main>
+      <section class="document" aria-label="Draft">
+        <article>
+          <h2>The quiet revolution of asynchronous work</h2>
+
+          <p class="lede">A draft. Select any paragraph and ask for review.</p>
+
+          <p>
+            Five years ago, working remotely was the unusual choice.
+            Today it is the unremarkable one. The shift happened too
+            quickly for most organizations to absorb its second-order
+            effects, and the conversation has barely caught up to where
+            work actually is.
+          </p>
+
+          <p>
+            The asynchronous-first model that emerged out of necessity in
+            2020 and has since become structural across knowledge work
+            has produced a strange paradox in which workers report higher
+            autonomy and satisfaction than at any point in the postwar
+            era while simultaneously reporting greater isolation, lower
+            trust in leadership, and a measurable decline in the quality
+            of collaboration on novel problems, which suggests not that
+            remote work is good or bad but that we have not yet learned
+            to use the tool we built ourselves.
+          </p>
+
+          <p>
+            There are real benefits and real costs. Different people
+            experience it differently. Each company has to find its own
+            way.
+          </p>
+
+          <p>
+            Anyone who claims that in-person work is more productive is
+            simply wrong. The research is unanimous. Decades of management
+            orthodoxy were built on assumptions that have been
+            comprehensively disproven.
+          </p>
+
+          <p>
+            What seems to work best are deliberately structured rhythms:
+            weekly all-hands video calls for shared context, written
+            async updates for status, in-person quarterly gatherings for
+            relationship building, and clear synchronous-only windows for
+            high-stakes decision making. Each rhythm has a different
+            cost; none is free.
+          </p>
+
+          <p>
+            The fight over whether remote work is here to stay has ended.
+            The interesting question now is what we have lost in the
+            transition that nobody noticed at the time, and what we are
+            about to lose if we do not redesign for the new shape of
+            work.
+          </p>
+        </article>
+      </section>
+
+      <aside class="notes" aria-label="Notes">
+        <h2>Notes</h2>
+
+        <form id="note-form">
+          <label for="note-input">Add a note</label>
+          <textarea
+            id="note-input"
+            name="note"
+            rows="3"
+            placeholder="Type or dictate a note…"
+          ></textarea>
+          <button id="note-save" type="submit">Save</button>
+        </form>
+
+        <div id="notes-empty" class="empty-state">
+          No notes yet. Select a paragraph and ask the assistant to
+          review it, or dictate a note of your own.
+        </div>
+
+        <ol id="notes-list" aria-label="Existing notes"></ol>
+      </aside>
+    </main>
+
+    <div id="status" aria-live="polite"></div>
+    <audio id="bot-audio" autoplay data-a11y-exclude></audio>
+
+    <script type="module" src="./main.js"></script>
+  </body>
+</html>
diff --git a/examples/multi-worker/ui-worker/document-review/client/main.js b/examples/multi-worker/ui-worker/document-review/client/main.js
new file mode 100644
index 000000000..6763d6713
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/main.js
@@ -0,0 +1,475 @@
+/**
+ * Document review — vanilla JS client.
+ *
+ * Combines the patterns from every prior demo into one workspace:
+ *
+ * - Snapshot streaming (every demo).
+ * - ``scroll_to`` and ``select_text`` for the agent to point back at
+ *   paragraphs (pointing + deixis).
+ * - ``set_input_value`` and ``click`` for dictating notes (form-fill).
+ * - ``ui-task`` envelopes for the in-flight review card with
+ *   per-worker progress and a Cancel button (async-tasks).
+ * - One **custom command**, ``add_note``, registered locally.
+ * - One **client-emitted event**, ``note_click``, sent when the user
+ *   clicks a note in the panel. The agent's
+ *   ``@on_ui_event("note_click")`` handler drives ``select_text`` to
+ *   navigate.
+ */
+
+import {
+  PipecatClient,
+  RTVIEvent,
+  findElementByRef,
+  findRefForElement,
+} from "@pipecat-ai/client-js";
+import { SmallWebRTCTransport } from "@pipecat-ai/small-webrtc-transport";
+
+const BOT_URL = "http://localhost:7860/api/offer";
+
+const connectButton = document.getElementById("connect");
+const status = document.getElementById("status");
+const botAudio = document.getElementById("bot-audio");
+const noteInput = document.getElementById("note-input");
+const noteForm = document.getElementById("note-form");
+const notesList = document.getElementById("notes-list");
+const notesEmpty = document.getElementById("notes-empty");
+const articleEl = document.querySelector("article");
+
+let client;
+let unsubscribes = [];
+
+// In-flight review groups, keyed by task_id. Rendered as cards above
+// the notes list while running.
+const reviewGroups = new Map();
+
+// All notes ever added in this session (transient — not persisted).
+// We use refs to find them and to drive the has-notes paragraph styling.
+const notes = [];
+
+// The last article paragraph the user selected. Tracked separately
+// from window.getSelection() because the textarea steals selection
+// focus when the user (or the agent) types into it. Updated only
+// when the selection lands inside the article.
+let lastArticleRef = null;
+
+// Walk up from a node looking for the first ancestor that has a
+// snapshot ref assigned. Used both at submit time and from the
+// selection-tracker below.
+function findRefForAncestor(node) {
+  let el = node && node.nodeType === 1 ? node : node?.parentElement ?? null;
+  while (el && el !== document.body) {
+    const ref = findRefForElement(el);
+    if (ref) return { ref, element: el };
+    el = el.parentElement;
+  }
+  return null;
+}
+
+document.addEventListener("selectionchange", () => {
+  const sel = document.getSelection();
+  if (!sel || sel.isCollapsed || !sel.anchorNode) return;
+  const found = findRefForAncestor(sel.anchorNode);
+  if (!found) return;
+  // Only remember selections inside the article column. Textarea /
+  // notes-pane selections shouldn't override it.
+  if (articleEl && articleEl.contains(found.element)) {
+    lastArticleRef = found.ref;
+  }
+});
+
+function setStatus(text, autoHideMs = 0) {
+  status.textContent = text;
+  status.dataset.show = text ? "1" : "0";
+  if (text && autoHideMs > 0) {
+    setTimeout(() => {
+      if (status.textContent === text) status.dataset.show = "0";
+    }, autoHideMs);
+  }
+}
+
+function refreshEmptyState() {
+  notesEmpty.hidden = notesList.children.length > 0 || reviewGroups.size > 0;
+}
+
+function resolveTarget(payload) {
+  if (payload?.ref) {
+    const el = findElementByRef(payload.ref);
+    if (el) return el;
+  }
+  if (payload?.target_id) {
+    return document.getElementById(payload.target_id);
+  }
+  return null;
+}
+
+// ─────────────────────────────────────────────
+// Standard command handlers
+// ─────────────────────────────────────────────
+
+function handleScrollTo(payload) {
+  const el = resolveTarget(payload);
+  if (!el) return;
+  el.scrollIntoView({ behavior: "smooth", block: "center" });
+}
+
+function handleSelectText(payload) {
+  const el = resolveTarget(payload);
+  if (!el) return;
+  const range = document.createRange();
+  range.selectNodeContents(el);
+  const sel = window.getSelection();
+  if (!sel) return;
+  sel.removeAllRanges();
+  sel.addRange(range);
+  el.scrollIntoView({ behavior: "smooth", block: "center" });
+}
+
+function handleSetInputValue(payload) {
+  const el = resolveTarget(payload);
+  if (!el) return;
+  if (!(el instanceof HTMLInputElement || el instanceof HTMLTextAreaElement))
+    return;
+  if (el.disabled || el.readOnly || el.type === "hidden") return;
+  const value = String(payload?.value ?? "");
+  const replace = payload?.replace !== false;
+  el.value = replace ? value : (el.value || "") + value;
+  el.dispatchEvent(new Event("input", { bubbles: true }));
+  el.dispatchEvent(new Event("change", { bubbles: true }));
+  el.classList.remove("fill-flash");
+  void el.offsetWidth;
+  el.classList.add("fill-flash");
+  setTimeout(() => el.classList.remove("fill-flash"), 1200);
+}
+
+function handleClick(payload) {
+  const el = resolveTarget(payload);
+  if (!el) return;
+  if ("disabled" in el && el.disabled) return;
+  el.click();
+}
+
+// ─────────────────────────────────────────────
+// Custom command: add_note
+//
+// Server emits this when a worker produces feedback, when the user's
+// dictated note is committed, etc. Payload: {source, ref?, text}.
+// We render a clickable card that — when clicked — sends a note_click
+// UI event back to the server so the agent can respond by selecting
+// the related paragraph.
+// ─────────────────────────────────────────────
+
+function handleAddNote(payload) {
+  const source = payload?.source ?? "me";
+  const ref = payload?.ref ?? null;
+  const text = String(payload?.text ?? "").trim();
+  if (!text) return;
+
+  const note = { source, ref, text };
+  notes.push(note);
+
+  const li = document.createElement("li");
+  li.className = "note";
+  if (ref) {
+    li.dataset.ref = ref;
+    li.tabIndex = 0;
+    li.title = "Click to jump to the paragraph";
+  }
+
+  const meta = document.createElement("div");
+  meta.className = "note-meta";
+
+  const sourceEl = document.createElement("span");
+  sourceEl.className = "note-source";
+  sourceEl.dataset.source = source;
+  sourceEl.textContent = source;
+  meta.appendChild(sourceEl);
+
+  if (ref) {
+    const refEl = document.createElement("span");
+    refEl.className = "note-ref";
+    refEl.textContent = `¶ ${ref}`;
+    meta.appendChild(refEl);
+  }
+
+  li.appendChild(meta);
+
+  const body = document.createElement("div");
+  body.className = "note-text";
+  body.textContent = text;
+  li.appendChild(body);
+
+  // Send a UI event when the user clicks the note. The server's
+  // @on_ui_event("note_click") handler turns it into a select_text
+  // command back to us — full round-trip, agent-driven.
+  if (ref) {
+    li.addEventListener("click", () => {
+      client?.sendUIEvent("note_click", { ref });
+    });
+  }
+
+  notesList.prepend(li);
+  refreshEmptyState();
+
+  // Mark the paragraph as having notes so it stands out in the
+  // document column.
+  if (ref) {
+    const para = findElementByRef(ref);
+    if (para) para.classList.add("has-notes");
+  }
+}
+
+// ─────────────────────────────────────────────
+// In-flight review card (ui-task envelopes)
+// ─────────────────────────────────────────────
+
+function renderReviewCard(group) {
+  const card = document.createElement("div");
+  card.className = "review-card";
+  card.dataset.taskId = group.task_id;
+
+  const header = document.createElement("div");
+  header.className = "review-card-header";
+
+  const label = document.createElement("div");
+  label.className = "review-card-label";
+  label.textContent = group.label ?? `Review ${group.task_id.slice(0, 6)}`;
+  header.appendChild(label);
+
+  if (group.cancellable) {
+    const cancel = document.createElement("button");
+    cancel.type = "button";
+    cancel.className = "review-card-cancel";
+    cancel.textContent = "Cancel";
+    cancel.addEventListener("click", () => {
+      cancel.disabled = true;
+      cancel.textContent = "Cancelling…";
+      client?.cancelUITask(group.task_id, "user requested");
+    });
+    group.cancelButton = cancel;
+    header.appendChild(cancel);
+  }
+  card.appendChild(header);
+
+  const ul = document.createElement("ul");
+  ul.className = "review-workers";
+  for (const agent of group.agents) {
+    const li = document.createElement("li");
+    li.dataset.agent = agent;
+
+    const name = document.createElement("span");
+    name.className = "review-worker-name";
+    name.textContent = agent;
+    li.appendChild(name);
+
+    const update = document.createElement("span");
+    update.className = "review-worker-update";
+    update.textContent = "starting…";
+    li.appendChild(update);
+
+    const stat = document.createElement("span");
+    stat.className = "review-worker-status";
+    stat.dataset.status = "running";
+    stat.textContent = "running";
+    li.appendChild(stat);
+
+    ul.appendChild(li);
+  }
+  card.appendChild(ul);
+
+  group.cardEl = card;
+  group.listEl = ul;
+  return card;
+}
+
+function updateWorkerRow(group, agentName, { update, statusValue }) {
+  const li = group.listEl.querySelector(
+    `li[data-agent="${CSS.escape(agentName)}"]`,
+  );
+  if (!li) return;
+  if (update !== undefined) {
+    li.querySelector(".review-worker-update").textContent = update;
+  }
+  if (statusValue !== undefined) {
+    const stat = li.querySelector(".review-worker-status");
+    stat.dataset.status = statusValue;
+    stat.textContent = statusValue;
+  }
+}
+
+function handleTaskEnvelope(env) {
+  switch (env.kind) {
+    case "group_started": {
+      const group = {
+        task_id: env.task_id,
+        label: env.label,
+        cancellable: env.cancellable,
+        agents: env.agents,
+        ref: extractRefFromLabel(env.label),
+      };
+      reviewGroups.set(env.task_id, group);
+      // Place the in-flight card just below the new-note form so it
+      // sits visibly above the existing notes.
+      noteForm.insertAdjacentElement("afterend", renderReviewCard(group));
+      // Mark the paragraph as under review.
+      if (group.ref) {
+        const para = findElementByRef(group.ref);
+        if (para) para.classList.add("under-review");
+      }
+      refreshEmptyState();
+      break;
+    }
+    case "task_update": {
+      const group = reviewGroups.get(env.task_id);
+      if (!group) break;
+      const text = env.data?.text ?? JSON.stringify(env.data);
+      updateWorkerRow(group, env.agent_name, { update: text });
+      break;
+    }
+    case "task_completed": {
+      const group = reviewGroups.get(env.task_id);
+      if (!group) break;
+      updateWorkerRow(group, env.agent_name, {
+        update: env.status === "completed" ? "✓ done" : env.status,
+        statusValue: env.status,
+      });
+      break;
+    }
+    case "group_completed": {
+      const group = reviewGroups.get(env.task_id);
+      if (!group) break;
+      // Drop the in-flight card; the notes that arrived via add_note
+      // remain in the list.
+      group.cardEl.remove();
+      reviewGroups.delete(env.task_id);
+      if (group.ref) {
+        const para = findElementByRef(group.ref);
+        if (para) para.classList.remove("under-review");
+      }
+      refreshEmptyState();
+      break;
+    }
+  }
+}
+
+function extractRefFromLabel(label) {
+  // The server sends labels like "Reviewing ¶ e5". Extract the ref so
+  // we can mark the paragraph as under-review while workers run.
+  const m = (label ?? "").match(/¶\s+(\S+)/);
+  return m ? m[1] : null;
+}
+
+function onUICommand(command, handler) {
+  const listener = (data) => {
+    if (data.command !== command) return;
+    handler(data.payload);
+  };
+  client.on(RTVIEvent.UICommand, listener);
+  return () => client.off(RTVIEvent.UICommand, listener);
+}
+
+function onUITask(handler) {
+  client.on(RTVIEvent.UITask, handler);
+  return () => client.off(RTVIEvent.UITask, handler);
+}
+
+// ─────────────────────────────────────────────
+// Form behavior
+// ─────────────────────────────────────────────
+
+// The user (or the agent via fills + click) submits a note. Pull the
+// textarea content into a synthetic add_note so it shows up in the
+// list, then clear the textarea. The note attaches to whichever
+// article paragraph the user last selected (tracked via
+// selectionchange above) — this works for both flows because the
+// textarea's selection focus does NOT overwrite ``lastArticleRef``.
+noteForm.addEventListener("submit", (e) => {
+  e.preventDefault();
+  const text = noteInput.value.trim();
+  if (!text) return;
+  handleAddNote({ source: "me", ref: lastArticleRef, text });
+  noteInput.value = "";
+});
+
+// ─────────────────────────────────────────────
+// Connection lifecycle
+// ─────────────────────────────────────────────
+
+async function connect() {
+  connectButton.disabled = true;
+  setStatus("Connecting…");
+
+  client = new PipecatClient({
+    transport: new SmallWebRTCTransport(),
+    enableMic: true,
+    enableCam: false,
+  });
+
+  client.on(RTVIEvent.BotConnected, () => setStatus("Bot connected", 1500));
+  client.on(RTVIEvent.Disconnected, () => {
+    setStatus("Disconnected", 2000);
+    connectButton.dataset.state = "";
+    connectButton.textContent = "Connect";
+    connectButton.disabled = false;
+    teardownUI();
+  });
+
+  client.on(RTVIEvent.TrackStarted, (track, participant) => {
+    if (track.kind !== "audio") return;
+    if (participant?.local) return;
+    botAudio.srcObject = new MediaStream([track]);
+  });
+
+  unsubscribes = [
+    onUICommand("scroll_to", handleScrollTo),
+    onUICommand("select_text", handleSelectText),
+    onUICommand("set_input_value", handleSetInputValue),
+    onUICommand("click", handleClick),
+    onUICommand("add_note", handleAddNote),
+    onUITask(handleTaskEnvelope),
+  ];
+
+  try {
+    await client.connect({ webrtcUrl: BOT_URL });
+    client.startUISnapshotStream();
+    connectButton.dataset.state = "connected";
+    connectButton.textContent = "Disconnect";
+    connectButton.disabled = false;
+    setStatus("Connected. Select a paragraph and ask 'review this'.", 5000);
+  } catch (err) {
+    console.error("Connect failed:", err);
+    setStatus(`Connect failed: ${err.message ?? err}`, 4000);
+    teardownUI();
+    connectButton.disabled = false;
+  }
+}
+
+async function disconnect() {
+  connectButton.disabled = true;
+  setStatus("Disconnecting…");
+  try {
+    await client?.disconnect();
+  } finally {
+    teardownUI();
+    connectButton.dataset.state = "";
+    connectButton.textContent = "Connect";
+    connectButton.disabled = false;
+  }
+}
+
+function teardownUI() {
+  client?.stopUISnapshotStream();
+  unsubscribes.forEach((unsubscribe) => unsubscribe());
+  unsubscribes = [];
+  if (botAudio.srcObject) botAudio.srcObject = null;
+  client = undefined;
+}
+
+connectButton.addEventListener("click", () => {
+  if (connectButton.dataset.state === "connected") {
+    disconnect();
+  } else {
+    connect();
+  }
+});
+
+refreshEmptyState();
diff --git a/examples/multi-worker/ui-worker/document-review/client/package-lock.json b/examples/multi-worker/ui-worker/document-review/client/package-lock.json
new file mode 100644
index 000000000..eaef449a7
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/package-lock.json
@@ -0,0 +1,1128 @@
+{
+  "name": "document-review-client",
+  "version": "0.1.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "document-review-client",
+      "version": "0.1.0",
+      "dependencies": {
+        "@pipecat-ai/client-js": "1.9.0",
+        "@pipecat-ai/small-webrtc-transport": "^1.10.2"
+      },
+      "devDependencies": {
+        "vite": "^8"
+      }
+    },
+    "node_modules/@babel/runtime": {
+      "version": "7.29.2",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.2.tgz",
+      "integrity": "sha512-JiDShH45zKHWyGe4ZNVRrCjBz8Nh9TMmZG1kh4QTK8hCBTWBi8Da+i7s1fJw7/lYpM4ccepSNfqzZ/QvABBi5g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@daily-co/daily-js": {
+      "version": "0.90.0",
+      "resolved": "https://registry.npmjs.org/@daily-co/daily-js/-/daily-js-0.90.0.tgz",
+      "integrity": "sha512-XnuuNIxLt8GOv+rFYoU+OPTSmVj+Mg9hRPK2EM6WYVY62F6rcw7vwzZBOSCisVuu1VnTIF/2J9V0VEBa83lDzw==",
+      "license": "BSD-2-Clause",
+      "dependencies": {
+        "@babel/runtime": "^7.12.5",
+        "@sentry/browser": "^8.33.1",
+        "bowser": "^2.8.1",
+        "dequal": "^2.0.3",
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+      "integrity": "sha512-pn99VhoACYR8nFHhxqix+uvsbXineAasWm5ojXoN8xEwK5Kd3/TrhNn1wByuD52UxWRLy8pu+kRMniEi6Eq9Zg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.4"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/SuperchupuDev"
+      }
+    },
+    "node_modules/tslib": {
+      "version": "2.8.1",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
+      "integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
+      "license": "0BSD",
+      "optional": true
+    },
+    "node_modules/typed-emitter": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/typed-emitter/-/typed-emitter-2.1.0.tgz",
+      "integrity": "sha512-g/KzbYKbH5C2vPkaXGu8DJlHrGKHLsM25Zg9WuC9pMGfuvT+X25tZQWo5fK1BjBm8+UrVE9LDCvaY0CQk+fXDA==",
+      "license": "MIT",
+      "optionalDependencies": {
+        "rxjs": "*"
+      }
+    },
+    "node_modules/uuid": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-10.0.0.tgz",
+      "integrity": "sha512-8XkAphELsDnEGrDxUOHB3RGvXz6TeuYSGEZBOjtTtPm2lwhGBjLgOzLHB63IUWfBpNucQjND6d3AOudO+H3RWQ==",
+      "deprecated": "uuid@10 and below is no longer supported.  For ESM codebases, update to uuid@latest.  For CommonJS codebases, use uuid@11 (but be aware this version will likely be deprecated in 2028).",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist/bin/uuid"
+      }
+    },
+    "node_modules/vite": {
+      "version": "8.0.14",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-8.0.14.tgz",
+      "integrity": "sha512-s4BJJ+5y1pYL6Otw51FHhVJQhPnuRinKig64g/1+EUNaJsd3gCKdD31IPFvswUgW9/60QT9oFHbZHbQK5imcxw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "lightningcss": "^1.32.0",
+        "picomatch": "^4.0.4",
+        "postcss": "^8.5.15",
+        "rolldown": "1.0.2",
+        "tinyglobby": "^0.2.16"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "@vitejs/devtools": "^0.1.18",
+        "esbuild": "^0.27.0 || ^0.28.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "@vitejs/devtools": {
+          "optional": true
+        },
+        "esbuild": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    }
+  }
+}
diff --git a/examples/multi-worker/ui-worker/document-review/client/package.json b/examples/multi-worker/ui-worker/document-review/client/package.json
new file mode 100644
index 000000000..cd7fb8dfe
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "document-review-client",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@pipecat-ai/client-js": "1.9.0",
+    "@pipecat-ai/small-webrtc-transport": "^1.10.2"
+  },
+  "devDependencies": {
+    "vite": "^8"
+  }
+}
diff --git a/examples/multi-worker/ui-worker/document-review/client/styles.css b/examples/multi-worker/ui-worker/document-review/client/styles.css
new file mode 100644
index 000000000..2889dfa27
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/styles.css
@@ -0,0 +1,406 @@
+:root {
+  color-scheme: light;
+  font-family: system-ui, -apple-system, sans-serif;
+  --border: #d4d4d8;
+  --muted: #71717a;
+  --selection: #fde68a;
+  --note-bg: #fff;
+  --note-border: #e4e4e7;
+  --accent: #3b82f6;
+  --running: #3b82f6;
+  --completed: #16a34a;
+  --error: #dc2626;
+  --cancelled: #71717a;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  background: #fafafa;
+  color: #18181b;
+}
+
+header {
+  position: sticky;
+  top: 0;
+  z-index: 10;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 1rem 1.5rem;
+  border-bottom: 1px solid var(--border);
+  background: #fff;
+}
+
+header h1 {
+  font-size: 1.125rem;
+  margin: 0;
+}
+
+#connect {
+  padding: 0.5rem 1rem;
+  border: 1px solid var(--border);
+  background: #fff;
+  border-radius: 6px;
+  cursor: pointer;
+  font-size: 0.875rem;
+}
+
+#connect:hover {
+  background: #f4f4f5;
+}
+
+#connect[data-state="connected"] {
+  background: #ef4444;
+  color: white;
+  border-color: #ef4444;
+}
+
+main {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) 24rem;
+  gap: 1.5rem;
+  max-width: 1200px;
+  margin: 0 auto;
+  padding: 1.5rem;
+}
+
+@media (max-width: 900px) {
+  main {
+    grid-template-columns: 1fr;
+  }
+}
+
+/* ─────────────────────────────────────────────
+   Document pane
+   ───────────────────────────────────────────── */
+
+.document {
+  background: #fff;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 2rem 2.25rem;
+}
+
+article h2 {
+  margin: 0 0 0.5rem;
+  font-size: 1.5rem;
+  font-family: Charter, Georgia, serif;
+  letter-spacing: -0.01em;
+}
+
+article .lede {
+  margin: 0 0 1.5rem;
+  font-size: 0.9375rem;
+  color: var(--muted);
+  font-style: italic;
+}
+
+article p {
+  margin: 0 0 1rem;
+  font-size: 1rem;
+  line-height: 1.65;
+  color: #27272a;
+  font-family: Charter, Georgia, serif;
+  scroll-margin-top: 6rem;
+  border-left: 2px solid transparent;
+  padding-left: 0.5rem;
+  margin-left: -0.5rem;
+  transition: border-color 0.4s;
+}
+
+article p.lede {
+  font-family: system-ui, -apple-system, sans-serif;
+}
+
+article p.under-review {
+  border-left-color: var(--running);
+}
+
+article p.has-notes {
+  border-left-color: #c7d2fe;
+}
+
+::selection {
+  background: var(--selection);
+  color: #18181b;
+}
+
+/* ─────────────────────────────────────────────
+   Notes pane
+   ───────────────────────────────────────────── */
+
+.notes {
+  position: sticky;
+  top: 5rem;
+  align-self: start;
+  background: #fff;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  padding: 1.25rem;
+  max-height: calc(100vh - 6rem);
+  overflow-y: auto;
+}
+
+.notes h2 {
+  margin: 0 0 1rem;
+  font-size: 0.8125rem;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+  color: var(--muted);
+}
+
+#note-form {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  margin-bottom: 1rem;
+}
+
+#note-form label {
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: #3f3f46;
+}
+
+#note-form textarea {
+  font: inherit;
+  font-size: 0.9375rem;
+  padding: 0.5rem 0.625rem;
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  background: #fff;
+  width: 100%;
+  resize: vertical;
+  scroll-margin-top: 6rem;
+  transition:
+    border-color 0.15s,
+    box-shadow 0.15s,
+    background 0.4s;
+}
+
+#note-form textarea:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
+}
+
+#note-form textarea.fill-flash {
+  animation: field-fill-flash 1.2s ease-out;
+}
+
+@keyframes field-fill-flash {
+  0% {
+    background: var(--selection);
+  }
+  100% {
+    background: #fff;
+  }
+}
+
+#note-save {
+  align-self: flex-start;
+  padding: 0.4375rem 0.875rem;
+  font: inherit;
+  font-size: 0.875rem;
+  font-weight: 500;
+  background: #18181b;
+  color: white;
+  border: 1px solid #18181b;
+  border-radius: 6px;
+  cursor: pointer;
+}
+
+#note-save:hover {
+  background: #27272a;
+}
+
+.empty-state {
+  font-size: 0.8125rem;
+  color: var(--muted);
+  font-style: italic;
+  padding: 1rem;
+  border: 1px dashed var(--border);
+  border-radius: 6px;
+  text-align: center;
+  margin-bottom: 1rem;
+}
+
+.empty-state[hidden] {
+  display: none;
+}
+
+#notes-list {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.625rem;
+}
+
+.note {
+  background: var(--note-bg);
+  border: 1px solid var(--note-border);
+  border-radius: 6px;
+  padding: 0.625rem 0.75rem;
+  cursor: pointer;
+  transition: border-color 0.15s;
+}
+
+.note:hover {
+  border-color: var(--accent);
+}
+
+.note-meta {
+  display: flex;
+  justify-content: space-between;
+  margin-bottom: 0.25rem;
+  font-size: 0.6875rem;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  color: var(--muted);
+}
+
+.note-source {
+  font-weight: 600;
+}
+
+.note-source[data-source="clarity"] {
+  color: #2563eb;
+}
+
+.note-source[data-source="tone"] {
+  color: #7c3aed;
+}
+
+.note-source[data-source="me"] {
+  color: #16a34a;
+}
+
+.note-text {
+  font-size: 0.875rem;
+  line-height: 1.45;
+  color: #3f3f46;
+}
+
+/* ─────────────────────────────────────────────
+   In-flight review card
+   ───────────────────────────────────────────── */
+
+.review-card {
+  background: #f9fafb;
+  border: 1px dashed var(--accent);
+  border-radius: 6px;
+  padding: 0.75rem 0.875rem;
+  margin-bottom: 0.75rem;
+}
+
+.review-card-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 0.75rem;
+  margin-bottom: 0.5rem;
+}
+
+.review-card-label {
+  font-size: 0.8125rem;
+  font-weight: 500;
+  color: #3f3f46;
+}
+
+.review-card-cancel {
+  padding: 0.1875rem 0.5rem;
+  border: 1px solid var(--border);
+  background: #fff;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 0.6875rem;
+  color: var(--muted);
+}
+
+.review-card-cancel:hover {
+  background: #f4f4f5;
+  color: #18181b;
+}
+
+.review-card-cancel[disabled] {
+  opacity: 0.4;
+  cursor: not-allowed;
+}
+
+.review-workers {
+  list-style: none;
+  margin: 0;
+  padding: 0;
+  display: flex;
+  flex-direction: column;
+  gap: 0.25rem;
+}
+
+.review-workers li {
+  display: flex;
+  align-items: baseline;
+  gap: 0.5rem;
+  font-size: 0.75rem;
+}
+
+.review-worker-name {
+  font-family: ui-monospace, "SF Mono", Menlo, monospace;
+  font-weight: 500;
+  min-width: 4.5rem;
+  color: #52525b;
+}
+
+.review-worker-update {
+  font-style: italic;
+  color: #52525b;
+  flex: 1;
+}
+
+.review-worker-status {
+  font-size: 0.6875rem;
+  font-weight: 500;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+.review-worker-status[data-status="running"] {
+  color: var(--running);
+}
+
+.review-worker-status[data-status="completed"] {
+  color: var(--completed);
+}
+
+.review-worker-status[data-status="cancelled"] {
+  color: var(--cancelled);
+}
+
+.review-worker-status[data-status="failed"],
+.review-worker-status[data-status="error"] {
+  color: var(--error);
+}
+
+#status {
+  position: fixed;
+  bottom: 1rem;
+  right: 1rem;
+  padding: 0.5rem 0.75rem;
+  border-radius: 6px;
+  font-size: 0.8125rem;
+  background: #18181b;
+  color: white;
+  opacity: 0;
+  transition: opacity 0.2s;
+  pointer-events: none;
+}
+
+#status[data-show="1"] {
+  opacity: 1;
+}
diff --git a/examples/multi-worker/ui-worker/document-review/client/vite.config.js b/examples/multi-worker/ui-worker/document-review/client/vite.config.js
new file mode 100644
index 000000000..ee3143e17
--- /dev/null
+++ b/examples/multi-worker/ui-worker/document-review/client/vite.config.js
@@ -0,0 +1,7 @@
+import { defineConfig } from "vite";
+
+export default defineConfig({
+  server: {
+    port: 5173,
+  },
+});
\ No newline at end of file