Zcash developers are integrating Udon, a Rust cryptography crate developed for Project Tachyon, into Zakura Common, the shared software stack used by the Zakura full node and other Zcash applications to build and verify shielded transactions. The Sept. 28 release makes Udon available to developers but does not alter Zcash consensus or activate Tachyon, which still requires community review, ZIP development and mainnet activation. Udon replaces Zakura Common's pasta_curves fork and much of Halo 2's arithmetic, consolidating optimized Pallas and Vesta curve operations used by both Ironwood and Tachyon. The work follows production performance gains in Zakura Common, including mobile proof generation reported at more than 14 times faster and iPhone 17 proving 21 times faster than the pre-Zakura baseline. Tachyon's proposed design aims to use recursive proofs and proof-carrying data to aggregate shielded transactions, reduce validator state and eventually support roughly 50,000 transactions per second.