Amazon Bedrock, Anthropic 고성능 코딩 모델 Claude 4 정식 출시

private let modelId = "us.anthropic.claude-sonnet-4-20250514-v1:0"

// Define the system prompt that instructs Claude how to respond
let systemPrompt = """
You are a senior iOS developer with deep expertise in Swift, especially Swift 6 concurrency. Your job is to perform a code review focused on identifying concurrency-related edge cases, potential race conditions, and misuse of Swift concurrency primitives such as Task, TaskGroup, Sendable, @MainActor, and @preconcurrency.

You should review the code carefully and flag any patterns or logic that may cause unexpected behavior in concurrent environments, such as accessing shared mutable state without proper isolation, incorrect actor usage, or non-Sendable types crossing concurrency boundaries.

Explain your reasoning in precise technical terms, and provide recommendations to improve safety, predictability, and correctness. When appropriate, suggest concrete code changes or refactorings using idiomatic Swift 6
"""
let system: BedrockRuntimeClientTypes.SystemContentBlock = .text(systemPrompt)

// Create the user message with text prompt and image
let userPrompt = """
Can you review the following Swift code for concurrency issues? Let me know what could go wrong and how to fix it.
"""
let prompt: BedrockRuntimeClientTypes.ContentBlock = .text(userPrompt)

// Create the user message with both text and image content
let userMessage = BedrockRuntimeClientTypes.Message(
    content: [prompt],
    role: .user
)

// Initialize the messages array with the user message
var messages: [BedrockRuntimeClientTypes.Message] = []
messages.append(userMessage)

// Configure the inference parameters
let inferenceConfig: BedrockRuntimeClientTypes.InferenceConfiguration = .init(maxTokens: 4096, temperature: 0.0)

// Create the input for the Converse API with streaming
let input = ConverseStreamInput(inferenceConfig: inferenceConfig, messages: messages, modelId: modelId, system: [system])

// Make the streaming request
do {
    // Process the stream
    let response = try await bedrockClient.converseStream(input: input)

    // Iterate through the stream events
    for try await event in stream {
        switch event {
        case .messagestart:
            print("AI-assistant started to stream")

        case let .contentblockdelta(deltaEvent):
            // Handle text content as it arrives
            if case let .text(text) = deltaEvent.delta {
                self.streamedResponse + = text
                print(text, termination: "")
            }

        case .messagestop:
            print("\n\nStream ended")
            // Create a complete assistant message from the streamed response
            let assistantMessage = BedrockRuntimeClientTypes.Message(
                content: [.text(self.streamedResponse)],
                role: .assistant
            )
            messages.append(assistantMessage)

        default:
            break
        }
    }