Zipper, Protocol 27 Upgrade (Tesnet tomorrow June 18, Mainnet July 8)

[Justin]

Hello Stellar Devs,

The Zipper, Protocol 27 rollout continues!  

Key dates:
-- Tomorrow, June 18, 2026 at 1700 UTC: Testnet upgrade
-- July 8, 2026 at 1700 UTC: Mainnet upgrade vote

Complete timeline, links to releases, and more info on the upgrade:
https://stellar.org/blog/foundation-news/stellar-zipper-protocol-27-upgrade-guide

Zipper, Protocol 27 introduces first-class authentication delegation for custom accounts, simplifying a previously painful process, and adds a new address-bound credential type (more details on that soon).