A deep-dive technical reference for the Cyoda Platform. This article outlines the architecture and mechanics of the Cyoda Platform Library, which includes asynchronous transactional workflows, point-in-time querying with snapshot isolation, distributed report execution, and event-context sharding. Designed for developers familiar with distributed systems, the document emphasizes low-level design decisions, like extended ACID semantics, integration with Cassandra and Zookeeper, and client-extensible workflows.