# Claude Code v1.0.56

> Claude Code v1.0.56, released 18 Jul 2025 (2025-07-18). 4 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/1.0.56

## Changes

### New Features and Improvements

Enhanced AWS SDK Integration

- **New AWS authentication schemes**: Added support for multiple authentication methods including SigV4, SigV4A, and bearer token authentication
- **Improved credential providers**:
- Added HTTP credential provider for containerized environments (ECS/EKS)
- Enhanced SSO credential provider with automatic token refresh
- Added support for environment variable-based credentials with account ID and credential scope
- **New authentication configuration**: Users can now specify authentication scheme preferences via:
- Environment variable: `AWS_AUTH_SCHEME_PREFERENCE`
- Config file setting: `auth_scheme_preference`
- Bearer tokens: `AWS_BEARER_TOKEN_<SERVICE_NAME>`

Protocol and Serialization Enhancements

- **Added comprehensive protocol support**:
- AWS JSON RPC (1.0 and 1.1)
- AWS Query protocol
- AWS EC2 Query protocol
- AWS REST JSON
- AWS REST XML
- **New serialization/deserialization infrastructure**: Added schema-based serialization with support for complex data types including big integers, big decimals, and timestamps

Improved Error Handling

- **Service exceptions**: New base `ServiceException` class with better error metadata
- **Protocol-specific error handling**: Each AWS protocol now has specialized error deserialization
- **Enhanced error messages**: More descriptive error messages with request IDs and extended metadata

Performance and Reliability

- **Request retry enhancements**: Improved retry strategies with configurable retry modes
- **Connection timeout configuration**: Different timeout settings based on deployment mode (standard, in-region, cross-region, mobile)
- **Middleware improvements**: Added recursion detection for Lambda environments to prevent infinite loops

Developer Experience

- **Command builder pattern**: New fluent API for building commands:

`  Command.classBuilder()
    .n("ServiceClient", "OperationCommand")
    .f(inputFilter, outputFilter)
    .ser(serializer)
    .de(deserializer)
    .build()`

- **Aggregated client support**: Automatically generate convenience methods for all service operations
- **Improved logging**: Better structured logging with sensitive data filtering

### Bug Fixes

- Fixed duplicate comment issue in generated code
- Improved URL validation for credential providers
- Better handling of missing or invalid credentials

### Breaking Changes

- Node.js 16.x deprecation warning: Support will end on January 6, 2025
- Some internal functions have been removed or refactored

### Technical Improvements

- Added support for endpoint URL resolution with proper protocol handling
- Enhanced XML and JSON parsing with better error recovery
- Improved support for streaming responses and event streams
- Better handling of binary data with proper base64 encoding/decoding

This version represents a significant enhancement to the AWS SDK integration capabilities, making it easier to work with AWS services through Claude Code's CLI interface.