feat(grid-agent): supervise grid sessions (#121)

crates/metacrate-grid-agent/src/lib.rs

@@ -9,18 +9,21 @@ pub mod config;
 pub mod llm;
 pub mod policy;
 pub mod service;
+pub mod session;
 pub mod tool_loop;
 pub mod types;
 
 #[cfg(test)]
 mod policy_tests;
+#[cfg(test)]
+mod session_tests;
 
-#[cfg(feature = "live-grid")]
-pub use backend::LibremetaverseClientOwner;
 pub use backend::{
     AuthorizedToolBackend, BackendError, BackendFuture, GridBackend, OfflineGridBackend,
     WorldMutator,
 };
+#[cfg(feature = "live-grid")]
+pub use backend::{LibremetaverseClientOwner, LibremetaverseSessionBackend};
 pub use config::{
     AgentConfig, BehaviorSettings, ConfigError, ConfigLoader, EndpointUrl, Environment,
     GridConnection, Limits, LlmConnection, MapEnvironment, OperatingMode, SecretString,
@@ -39,6 +42,12 @@ pub use policy::{
     ResourceCost, ResourceEstimator, Risk, SchedulerGrantId, UntrustedData, UntrustedSource,
 };
 pub use service::{AgentService, ServiceError, ServiceHandle, ServiceState};
+pub use session::{
+    GridSession, GridSessionBackend, ReconnectPolicy, SessionControl, SessionFailure,
+    SessionFailureKind, SessionFuture, SessionObservation, SessionSignal, SessionState,
+    SessionStatus, SessionSupervisor, SessionSupervisorError, SessionSupervisorHandle, SessionWork,
+    WorkDisposition, WorkKind,
+};
 pub use tool_loop::{
     HistorySummarizer, SessionGeneration, ToolExecution, ToolExecutor, ToolFuture, ToolLoop,
     ToolLoopError, ToolLoopLimits, ToolLoopOutcome,