aws-sdk-swift-usage
AWS SDK for Swift development patterns. Use when writing Swift code that uses AWS services via aws-sdk-swift package.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/aws/agent-toolkit-for-aws --skill aws-sdk-swift-usage- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads aws-sdk-swift-usage automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
AWS SDK for Swift
Async Code Structure
All SDK operations are async. Use @main entry point:
@main
struct Main {
static func main() async throws {
let client = try await S3Client()
// ... async operations
}
}
CRITICAL: Use Struct Config Types
NEVER use S3ClientConfiguration or DynamoDBClientConfiguration - these are DEPRECATED classes.
ALWAYS use the struct-based config types:
S3Client.S3ClientConfig(not S3ClientConfiguration)DynamoDBClient.DynamoDBClientConfig(not DynamoDBClientConfiguration)STSClient.STSClientConfig(not STSClientConfiguration)
Config parameters MUST be in declaration order. Region is ALWAYS required when creating a config. Check the service client source for exact order.
// CORRECT - struct config
let config = try await S3Client.S3ClientConfig(region: "us-west-2")
let client = S3Client(config: config)
// WRONG - deprecated class
// let config = try await S3Client.S3ClientConfiguration(region: "us-west-2")
Client Creation
All service clients follow the same pattern: <Service>Client with <Service>Client.<Service>ClientConfig.
Model types (structs/enums used in requests/responses) are namespaced under <Service>ClientTypes:
S3ClientTypes.Bucket,S3ClientTypes.ObjectDynamoDBClientTypes.AttributeValueCloudWatchClientTypes.MetricDatum,CloudWatchClientTypes.Dimension
import AWSS3
import AWSDynamoDB
// Simple - auto-detects region
let s3 = try await S3Client()
let dynamo = try await DynamoDBClient()
// With region
let s3 = try S3Client(region: "us-west-2")
// With config - parameters must be in declaration order
let config = try await S3Client.S3ClientConfig(
useFIPS: true,
awsRetryMode: .adaptive,
maxAttempts: 5,
region: "us-west-2"
)
let client = S3Client(config: config)
// With custom endpoint and credentials
let config = try await S3Client.S3ClientConfig(
awsCredentialIdentityResolver: resolver,
region: "us-west-2",
endpoint: "https://s3.custom-endpoint.com"
)
Common config parameters (MUST follow declaration order):
-
awsCredentialIdentityResolver- Custom credentials -
useFIPS- Enable FIPS endpoints -
useDualStack- Enable dual-stack endpoints -
awsRetryMode- Retry strategy (.adaptive, .standard, .legacy) -
maxAttempts- Max retry attempts -
region- AWS region -
httpClientEngine- Custom HTTP client (requires HttpClientConfiguration parameter):import ClientRuntime let httpConfig = HttpClientConfiguration() let httpClient = URLSessionHTTPClient(httpClientConfiguration: httpConfig) let config = try await S3Client.S3ClientConfig( region: "us-east-1", httpClientEngine: httpClient ) -
endpoint- Custom endpoint URL
For service-specific config options or exact parameter order, check Sources/Services/AWS<Service>/Sources/AWS<Service>/<Service>Client.swift in the SDK.
Credential Resolvers
import AWSSDKIdentity
import SmithyIdentity
// Static credentials - pass credential object directly
let creds = AWSCredentialIdentity(accessKey: "AKIA...", secret: "...")
let resolver = StaticAWSCredentialIdentityResolver(creds)
// Assume role - REQUIRES underlying resolver
let underlying = try DefaultAWSCredentialIdentityResolverChain()
let resolver = try STSAssumeRoleAWSCredentialIdentityResolver(
awsCredentialIdentityResolver: underlying,
roleArn: "arn:aws:iam::123456789012:role/MyRole",
sessionName: "session-name"
)
// Use in config
let config = try await S3Client.S3ClientConfig(
awsCredentialIdentityResolver: resolver,
region: "us-west-2"
)
Waiters
Import SmithyWaitersAPI. WaiterOptions requires maxWaitTime parameter:
import AWSS3
import SmithyWaitersAPI
let client = try await S3Client()
_ = try await client.waitUntilBucketExists(
options: WaiterOptions(maxWaitTime: 120.0),
input: HeadBucketInput(bucket: "my-bucket")
)
Pagination
let input = ListObjectsV2Input(bucket: "my-bucket")
for try await page in client.listObjectsV2Paginated(input: input) {
for object in page.contents ?? [] {
print(object.key ?? "")
}
}
Presigned URLs
let url = try await client.presignedURLForGetObject(
input: GetObjectInput(bucket: "my-bucket", key: "file.pdf"),
expiration: 3600
)
Common Operations
// Put object
_ = try await client.putObject(input: PutObjectInput(
body: .data(data),
bucket: "bucket",
key: "key"
))
// Get object
let output = try await client.getObject(input: GetObjectInput(bucket: "bucket", key: "key"))
let data = try await output.body?.readData()
// List buckets
let response = try await client.listBuckets(input: ListBucketsInput())
for bucket in response.buckets ?? [] {
print(bucket.name ?? "")
}
FAQ
What does the aws-sdk-swift-usage skill do?
AWS SDK for Swift development patterns. Use when writing Swift code that uses AWS services via aws-sdk-swift package.
How do I install aws-sdk-swift-usage?
Run npx skills add https://github.com/aws/agent-toolkit-for-aws --skill aws-sdk-swift-usage in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/aws-sdk-swift-usage/ (personal) or .claude/skills/aws-sdk-swift-usage/ (project).
Which AI agents can use aws-sdk-swift-usage?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is aws-sdk-swift-usage safe to install?
Security partners have reviewed it: Gen Agent Trust Hub passed; Socket passed; Snyk passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains aws-sdk-swift-usage?
It is published by aws in aws/agent-toolkit-for-aws, and it is an official skill from the maker of the technology it covers. It has 6,582 recorded installs.
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