Zero-knowledge proof software developer RISC Zero announced the launch of hybrid architecture tools and contracts Kailua, a software suite for upgrading Optimistic Rollup to Hybrid ZK Rollup, with its first implementation supported by Optimism's Kona Rollup state transition engine. Kailua's hybrid architecture can be used to support the normal operation of Rollups without worrying about ongoing proof costs and time, and it can also relieve users of additional proof costs. Kailua is a fully open source project that is currently under rapid development and is only suitable for test environments, not production environments.