interface uuid {
    /// A 128-bit UUID represented as two 64-bit integers.
    record uuid {
        high: u64,
        low: u64,
    }

    /// Generates a new random v4 UUID.
    generate: func() -> uuid;

    /// Parses a UUID from a string. Returns none if the string is not a valid UUID.
    parse: func(s: string) -> option<uuid>;

    /// Converts a UUID to its standard string representation.
    to-string: func(id: uuid) -> string;
}