From blank page to confident read.

import AppKit

var link = URLComponents()
link.scheme = "textream"
link.host = "read"
link.queryItems = [
    URLQueryItem(
        name: "text",
        value: "Welcome everyone. [pause] Let's begin."
    )
]

if let url = link.url {
    NSWorkspace.shared.open(url)
}

const script = "Welcome everyone. [pause] Let's begin.";
const url = `textream://read?text=${encodeURIComponent(script)}`;

window.location.href = url;

# pip install websockets
import asyncio, json, re, urllib.request
import websockets

HOST = "192.168.1.42"
HTTP_PORT = 7575

def get_token():
    url = f"http://{HOST}:{HTTP_PORT}"
    with urllib.request.urlopen(url, timeout=3) as response:
        page = response.read().decode("utf-8")
    match = re.search(r"AUTH_TOKEN='([0-9a-f]{64})'", page)
    if not match:
        raise RuntimeError("Director token not found")
    return match.group(1)

async def run():
    async with websockets.connect(
        f"ws://{HOST}:{HTTP_PORT + 1}"
    ) as socket:
        await socket.send(json.dumps({
            "type": "auth", "text": get_token()
        }))
        await socket.send(json.dumps({
            "type": "setText",
            "text": "Hello everyone.\nWelcome to the show."
        }))

        async for message in socket:
            state = json.loads(message)
            print(state["highlightedCharCount"], state["isDone"])
            if state["isDone"]:
                await socket.send(json.dumps({"type": "stop"}))
                break

asyncio.run(run())

// npm install ws  (Node.js 18+)
import WebSocket from "ws";

const host = "192.168.1.42";
const httpPort = 7575;
const page = await fetch(`http://${host}:${httpPort}`)
  .then(response => response.text());
const token = page.match(/AUTH_TOKEN='([0-9a-f]{64})'/)?.[1];
if (!token) throw new Error("Director token not found");

const socket = new WebSocket(`ws://${host}:${httpPort + 1}`);
socket.on("open", () => {
  socket.send(JSON.stringify({ type: "auth", text: token }));
  socket.send(JSON.stringify({
    type: "setText",
    text: "Hello everyone.\nWelcome to the show."
  }));
});

socket.on("message", raw => {
  const state = JSON.parse(raw.toString());
  console.log(state.highlightedCharCount, state.isDone);
  if (state.isDone) {
    socket.send(JSON.stringify({ type: "stop" }), () => socket.close());
  }
});