Session & cycle de vie

import FoundationModels

let session = LanguageModelSession()

let session = LanguageModelSession(
    instructions: """
    You help intermediate Swift developers.
    Keep answers concise.
    """
)

let session = LanguageModelSession(
    tools: [WeatherTool()]
)

import FoundationModels
import Observation

@Observable
@MainActor
final class ChatViewModel {
    var messages: [String] = []
    var errorMessage: String?
    var isResponding: Bool { session.isResponding }

    private var session = LanguageModelSession(
        instructions: "You are a concise assistant."
    )

    func send(_ prompt: String) async {
        errorMessage = nil

        do {
            let response = try await session.respond(to: prompt)
            messages.append("Vous : \(prompt)")
            messages.append("IA : \(response.content)")
        } catch {
            errorMessage = error.localizedDescription
        }
    }

    func resetConversation() {
        session = LanguageModelSession(
            instructions: "You are a concise assistant."
        )
        messages.removeAll()
    }
}

import FoundationModels

let existingSession = LanguageModelSession()
let savedTranscript = existingSession.transcript

let restoredSession = LanguageModelSession(
    model: SystemLanguageModel.default,
    tools: [],
    transcript: savedTranscript
)

Button("Envoyer") {
    Task { await viewModel.send(userPrompt) }
}
.disabled(viewModel.isResponding)

let session = LanguageModelSession()
session.prewarm()