Context-propagation substrate runtime: ContextHolder impl, registries, propagator, lifecycle helpers

Event bus service dispatch with contract-first interfaces and resilience policies

Extension API for the REST framework: interfaces, annotations, lifecycle hooks, middleware

Vert.x-aware MDC, structured logging, and audit trail support

Workflow runtime core: plan model, DSL, registry, public WorkflowOperations facade, generic transactional SPIs, side-effect recorder SPI, contract annotations. SQL-free.

Default security runtime: authorization engine, action registry, in-memory policy resolvers, security event emitter, and Dagger modules

Format-agnostic Kafka runtime: serde SPI, producer/consumer infrastructure, and event bus dispatch

Timer-based cron job scheduling with EVERY_INSTANCE and SINGLE_INSTANCE execution modes

Holder-bound CorrelationContext runtime (mutable impl, factory, mutator, encoders, seeder, Dagger module)

Job execution core: state machine, context, interceptors, lock provider, and repository SPI

Persistent delayed job queue: enqueue service, polling verticle, and handler registration