Customizable Client Creation Through Spring Customizer Pattern

** - Provides auto-configuration for MCP client functionality in Spring Boot applications.

Unique: Uses Spring Boot's standard Customizer pattern for post-configuration customization, allowing MCP client customization to follow Spring Boot conventions rather than requiring custom extension points

vs others: Customizer pattern is more flexible than property-based configuration alone, while remaining simpler than full bean override, providing middle ground for advanced customization needs