Live data

Three packages reach outside the process. They differ from the rest of the engine in one important way: the first result is a pending value, and the real answer arrives later.

Weather

Built in and enabled by default, because the underlying service needs no key.

Expression	Result
weather in Paris	a description and temperature
temperature in Tokyo	the current temperature
high in Berlin	the daily maximum

Stocks

Opt-in. You supply the fetching function, so the engine never holds a key.

import { createStocksPackage } from "solve-engine/packages";

const stocks = createStocksPackage({
  fetchQuote: async (ticker, signal) => {
    const res = await fetch(`https://example.com/quote/${ticker}`, { signal });
    return res.json();
  },
});

Without that function, stock(AAPL) returns a clearly named configuration error rather than a fabricated price.

Knowledge

Also opt-in, and also supplied as a function.

Expression	Result
search: distance to the moon	whatever your provider answers
distance to the moon = ?	the same, in a different phrasing