Test support: the helpers and checks that several Stratum modules' tests share, and PostgreSQL and Redis containers for services' integration tests.

Metrics, traces and health, sent over OTLP to an OpenTelemetry Collector, with safe defaults.

Structured JSON logs in one format, with the service's name and environment on every line and secrets and personal data redacted before anything is written.

What stratum-starter-webmvc and stratum-starter-webflux share: the web settings and the error format.

The rules that mask secrets and personal data in text, shared by stratum-starter-logging and stratum-starter-observability.

Spring MVC for a service that is not reactive, with Stratum's error format, request fields in logs and the correlation ID. Planned: request log and timeouts.

What the HTTP client starters share: the @StratumClient annotation, the settings of each client and the module's codes.

Spring's caching switched on, with bounded Caffeine caches by default and safe Redis defaults on Spring Boot's own keys.

Blocking clients of other services: @StratumClient interfaces on RestClient and Apache HttpClient 5, each with its own timeouts and bounded connection pool.

Spring WebFlux for a reactive service, with Stratum's error format, request fields in logs and the correlation ID. Planned: request log and timeouts.

Parent POM for a REST microservice: stratum-parent plus the stratum-starter-microservice bundle, and stratum-test and spring-boot-starter-test for tests.