add converse example (#18)

* add converse example

* swift format

Author: sebsto

Examples/converse/.gitignore

@@ -0,0 +1,8 @@
+.DS_Store
+/.build
+/Packages
+xcuserdata/
+DerivedData/
+.swiftpm/configuration/registries.json
+.swiftpm/xcode/package.xcworkspace/contents.xcworkspacedata
+.netrc

Examples/converse/Package.swift

@@ -0,0 +1,27 @@
+// swift-tools-version: 6.1
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "Converse",
+    platforms: [.macOS(.v15), .iOS(.v18), .tvOS(.v18)],
+    products: [
+        .executable(name: "Converse", targets: ["Converse"])
+    ],
+    dependencies: [
+        .package(url: "https://github.com/build-on-aws/swift-bedrock-library.git", branch: "main"),
+        .package(url: "https://github.com/apple/swift-log.git", from: "1.5.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package, defining a module or a test suite.
+        // Targets can depend on other targets in this package and products from dependencies.
+        .executableTarget(
+            name: "Converse",
+            dependencies: [
+                .product(name: "BedrockService", package: "swift-bedrock-library"),
+                .product(name: "Logging", package: "swift-log"),
+            ]
+        )
+    ]
+)

Examples/converse/Sources/Converse.swift

@@ -0,0 +1,70 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift Bedrock Library open source project
+//
+// Copyright (c) 2025 Amazon.com, Inc. or its affiliates
+//                    and the Swift Bedrock Library project authors
+// Licensed under Apache License v2.0
+//
+// See LICENSE.txt for license information
+// See CONTRIBUTORS.txt for the list of Swift Bedrock Library project authors
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+//===----------------------------------------------------------------------===//
+
+import BedrockService
+import Logging
+
+@main
+struct Main {
+    static func main() async throws {
+        do {
+            try await Main.converse()
+        } catch {
+            print("Error:\n\(error)")
+        }
+    }
+    static func converse() async throws {
+        var logger = Logger(label: "Converse")
+        logger.logLevel = .debug
+
+        let bedrock = try await BedrockService(
+            region: .useast1,
+            logger: logger
+                // uncomment if you use SSO with AWS Identity Center
+                //    authentication: .sso
+        )
+
+        // select a model that supports the converse modality
+        // models must be enabled in your AWS account
+        let model: BedrockModel = .nova_lite
+
+        guard model.hasConverseModality() else {
+            throw MyError.incorrectModality("\(model.name) does not support converse")
+        }
+
+        // create a request
+        var builder = try ConverseRequestBuilder(with: model)
+            .withPrompt("Tell me about rainbows")
+
+        // send the request
+        var reply = try await bedrock.converse(with: builder)
+
+        print("Assistant: \(reply)")
+
+        // create the next request
+        // you can use the previous reply to continue the conversation
+        builder = try ConverseRequestBuilder(from: builder, with: reply)
+            .withPrompt("Do you think birds can see them too?")
+
+        // send the next request
+        reply = try await bedrock.converse(with: builder)
+
+        print("Assistant: \(reply)")
+    }
+
+    enum MyError: Error {
+        case incorrectModality(String)
+    }
+}

Package.swift

@@ -26,15 +26,13 @@ let package = Package(
                 .product(name: "Smithy", package: "smithy-swift"),
                 .product(name: "Logging", package: "swift-log"),
                 .product(name: "AwsCommonRuntimeKit", package: "aws-crt-swift"),
-            ],
-            path: "Sources/BedrockService"
+            ]
         ),
         .testTarget(
             name: "BedrockServiceTests",
             dependencies: [
                 .target(name: "BedrockService")
-            ],
-            path: "Tests/BedrockServiceTests"
+            ]
         ),
     ]
 )