Devin Desktop replaces Cascade with Devin Local — a Rust rewrite that Cognition says cuts token usage by up to 30% and adds subagent execution. The Agent Command Center, previously a panel in Windsurf 2.0, is now the default surface. Cascade will be deprecated July 1, giving existing Windsurf users about a month to adjust; the update ships OTA, and plans, pricing, and extensions carry over unchanged. The more interesting signal is the ACP commitment. Agent Client Protocol — created by Zed Industries in August 2025 and now backed by JetBrains, Google, GitHub, and 25-plus agents — is quietly becoming the connective tissue between AI coding tools. Devin Desktop works with Codex, Claude Agent, OpenCode, and custom in-house agents via ACP out of the box. Whether that cross-agent interoperability matters in practice depends on whether the teams building those agents actually integrate, but the protocol adoption curve is hard to ignore.