On the JS/TS client side: Taquito v25.0.0 is out with U025 support; the PsUshuai9… protocol hash registered, U025 as the default for local forging and Michelson encoding, the new U025 RPC constants fields (DAL params, stake-cache cycles, canonical smart-rollup address), and USHUAIANET wired through the network mapping. dApp and SDK developers can pull it from npm now.
Details and upgrade notes: Taquito v25.0.0: Ushuaia (U025) protocol support
