Spring Boot Security Implementation

About

This skill streamlines the implementation and migration of security configurations in Spring Boot 4 applications. It provides Claude with the specialized knowledge required to handle Spring Security 7's breaking changes, such as the mandatory shift to Lambda DSL, the transition from WebSecurityConfigurerAdapter to SecurityFilterChain beans, and the adoption of @EnableMethodSecurity. It is ideal for developers building modern REST APIs, OAuth2 resource servers, or session-based web applications who need to ensure their security architecture follows the latest industry best practices and avoids deprecated anti-patterns.

Key Features

• Modern CORS and CSRF protection for SPAs and REST APIs
• Mandatory Lambda DSL configuration for SecurityFilterChain
• 3 GitHub stars
• Method-level security using @PreAuthorize and SpEL
• OAuth2 and JWT resource server implementation patterns
• Argon2 password encoding and secure credential handling

Use Cases

• Configuring fine-grained method-level authorization for business logic
• Implementing stateless JWT authentication for microservices
• Migrating legacy Spring Security configurations to Spring Boot 4 standards