Centralize Journey mapping, interaction ordering, and localized tool presentation; remove redundant multiplexer and paywall state. Consume AgentKit 2.2.0 for shared operation, output, and transcript contracts, and correct its maintenance checkout documentation.
Validation: AgentKit 304 tests and local-package macOS/shared 215 regressions passed. iOS app built; 38 focused tests reported passing with an existing broken fixture excluded, but Xcode finalization stalled. Default macOS tests retain timeouts and Secure Enclave failures. A subsequent remote-pin build reported AgentTranscriptMessage.toolResult unavailable; it has not been diagnosed.
Co-Authored-By: Claude Code <noreply@anthropic.com>
