Sui testnet v1.66.1 release

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eug...@mystenlabs.com

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Feb 17, 2026, 5:49:57 PMFeb 17

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The next Sui v1.66.1 upgrade for testnet is now available. This release includes protocol version 112, which will activate at the next epoch boundary once 83.4% of validators by stake have upgraded. Thank you!

Branch: testnet
Commit: bac3f508b83be5812fd937c84f7d5395c020b219
Tag: testnet-v1.66.1
Release Notes: https://github.com/MystenLabs/sui/releases/tag/testnet-v1.66.1

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