Pre-Vertx bootstrap kernel: the VertxBuilderContributor ServiceLoader seam, bootstrap context, and contributor runner used to customize the VertxBuilder before the Vertx instance is created

Backend-agnostic Micrometer metrics core: registry provider SPI, composite assembly, and bootstrap contributor

Framework-owned application entrypoint (VertiqueApplication) with the VertxBuilderContributor ServiceLoader seam for pre-Vertx builder customization

OpenTelemetry SDK bootstrap, Vert.x tracer installation, trace-log correlation bridge, and security span events