New Features

AWS Authentication Enhancements

• AWS Auth Refresh Command: Added awsAuthRefresh configuration option that allows users to specify a command to run when AWS credentials need refreshing. This command is automatically executed when AWS authentication fails.

  # In ~/.claude.json or settings:
  {
    "awsAuthRefresh": "aws sso login --profile myprofile"
  }

• AWS Credential Export: Added awsCredentialExport configuration option for dynamically providing AWS credentials from external sources.

  # In ~/.claude.json or settings:
  {
    "awsCredentialExport": "aws sts assume-role --role-arn arn:aws:iam::123456789012:role/MyRole --role-session-name claude-session"
  }

The command must return AWS STS-compatible JSON output with Credentials.AccessKeyId, Credentials.SecretAccessKey, and Credentials.SessionToken.

OpenTelemetry Support

• Custom OTEL Headers: Added otelHeadersHelper configuration option to dynamically set OpenTelemetry headers for tracing and monitoring.

  # In ~/.claude.json or settings:
  {
    "otelHeadersHelper": "echo '{\"x-trace-id\": \"'$(uuidgen)'\", \"x-org-id\": \"myorg\"}'"
  }

MCP (Model Context Protocol) Enhancements

• Server Instructions: MCP servers can now provide custom instructions that are automatically included in the system prompt, helping Claude understand how to use specific tools and resources.
• Batch Connection Size: Added MCP_SERVER_CONNECTION_BATCH_SIZE environment variable to control concurrent MCP server connections (default: 3).
• Improved MCP Command Parsing: MCP commands are now properly identified with "(MCP)" suffix in command names.

Enhanced Conversation Management

• Restore Options: When jumping to a previous message (Cmd+L), users can now choose what to restore:
• Both: Restore both conversation history and workspace state
• Conversation only: Keep current workspace, restore chat history
• Workspace only: Keep current chat, restore workspace state

Terminal Improvements

• Dynamic Terminal Resizing: Improved handling of terminal window resizing with proper event listeners and state management.
• Better TTY Detection: Enhanced checks for interactive terminal environments.