Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-agent-lifecycle/src/lib.rs

@@ -0,0 +1,17 @@
+//! Host-agnostic agent lifecycle hooks shared by multiple agent hosts (e.g. xai-grok-shell).
+//! Contributors receive data-only per-hook inputs at dispatch time; anything they act through is a
+//! capability injected at install time, and they never own loop control.
+
+pub mod local;
+pub mod send;
+
+pub use local::{
+    LocalCommandContributor, LocalExtensionRegistry, LocalExtensionRegistryBuilder,
+    LocalSessionLifecycleContributor, LocalTurnInputContributor, LocalTurnLifecycleContributor,
+};
+pub use send::{
+    CommandAction, CommandContributor, CommandInvocation, CommandSpec, ExtensionRegistry,
+    ExtensionRegistryBuilder, SessionIdleInput, SessionLifecycleContributor, TurnAbortInput,
+    TurnAbortReason, TurnDoneInput, TurnErrorInput, TurnInputContext, TurnInputContributor,
+    TurnInputFragment, TurnLifecycleContributor, TurnStartInput,
+};