Apple's Foundation Models

.package(url: "https://github.com/apple/foundation-models-utilities", from: "1.0.0")

import FoundationModels
import FoundationModelsUtilities

let nur = ChatCompletionsLanguageModel(
    name: "nur-v1",
    url: URL(string: "https://api.eesi.ai")!,
    additionalHeaders: ["Authorization": "Bearer \(apiKey)"]
)

let session = LanguageModelSession(
    model: nur,
    instructions: "You help people plan their week. Answer in a few sentences."
)
let reply = try await session.respond(to: "What should I do first on Monday?")
print(reply.content)

@Generable
struct Trip {
    @Guide(description: "A short, memorable name for the trip")
    var name: String
    @Guide(description: "How many days it lasts")
    var days: Int
}

let trip = try await session.respond(
    to: "Plan a short trip to Paris.",
    generating: Trip.self
)
print(trip.content.name, trip.content.days)

struct GetWeather: Tool {
    let name = "getWeather"
    let description = "The current weather in a city."

    @Generable
    struct Arguments {
        @Guide(description: "The city, like Cairo or Lisbon")
        var city: String
    }

    func call(arguments: Arguments) async throws -> String {
        try await weatherService.summary(for: arguments.city)
    }
}

let session = LanguageModelSession(model: nur, tools: [GetWeather()])
let reply = try await session.respond(to: "Do I need an umbrella in Cairo today?")