v3.1.0

Spring Boot 4 Platform Migration — upgrades the runtime from Spring Boot 3.5 / Spring AI 1.1 to Spring Boot 4.1 / Spring AI 2.0 (MCP Java SDK 2.0), completes the move to Jackson 3, and replaces the OkHttp transport with the JDK HttpClient. The MCP tool surface and every JSON response shape are unchanged — this is a platform refresh, not an API change. SYNC server/client mode, the docker-profile stdio enablement, and stderr-only logging are intentionally retained (MCP SDK issue #686 and stdio JSON-RPC safety still apply).

Changed (3.1.0)

• Spring Boot 4.1.0 / Spring AI 2.0.0: upgraded the platform parent and the Spring AI BOM; Spring AI 2.0 brings MCP Java SDK 2.0. Tool definitions, response models, and both transports (stdio + streamable HTTP) are unchanged.
• Jackson 3: migrated application and XML-parsing code from Jackson 2 (com.fasterxml.jackson.databind / dataformat) to Jackson 3 (tools.jackson.*). Jackson annotations stay under com.fasterxml.jackson.annotation (retained by Jackson 3). Boot's auto-configured Jackson 3 JsonMapper now serializes tool responses, and Optional / Java time types are handled natively by Jackson 3 core.
• HTTP transport: Maven Central / OSV access now uses the JDK HttpClient via Spring's JdkClientHttpRequestFactory (HTTP/2, normal redirects, connect timeout from maven.central.timeout, read timeout + 2s). BASIC / BEARER private-repository authentication is preserved through a RestClient request interceptor; connection reuse is managed internally by the JDK client and the Resilience4j retry policy is unchanged.
• Resilience4j Boot 4 integration: resilience4j-spring-boot3 → resilience4j-spring-boot4; the @CircuitBreaker / @Retry / @RateLimiter AOP support moved from spring-boot-starter-aop to spring-boot-starter-aspectj.
• Native reflection hints: updated NativeImageConfiguration for Spring Framework 7 — field categories use the ACCESS_* form and the deprecated INTROSPECT_* member categories are dropped (invocation hints already imply introspection).

Removed (3.1.0)

• Logback native-stdio version pin: the logback.version=1.5.22 override is gone — Boot 4.1's managed Logback keeps native stdio stdout clean (verified by the native initialize smoke test).
• OkHttp transport: removed the okhttp-jvm dependency, the okhttp.version property, and the deprecated OkHttp3ClientHttpRequestFactory, which is unavailable on Spring Framework 7.
• maven.central.connection-pool-size property: an OkHttp-specific idle-pool knob with no JDK HttpClient equivalent; removed from application.yaml and the configuration metadata.
• Custom Jackson 2 mapper and datatype modules: deleted JacksonConfig and the jackson-datatype-jdk8 / jackson-datatype-jsr310 dependencies in favor of Boot's Jackson 3 auto-configuration.