feat(grid-agent): establish architecture and config (#118)

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

@@ -0,0 +1,25 @@
+//! Bounded service foundation for the native `MetaCrate` `OpenSim` grid agent.
+//!
+//! Configuration is resolved and validated before [`AgentService::start`]
+//! creates tasks or calls a backend. The core has no signal, terminal, path,
+//! subprocess, provider-SDK, or platform-specific dependency.
+
+pub mod backend;
+pub mod config;
+pub mod service;
+pub mod types;
+
+#[cfg(feature = "live-grid")]
+pub use backend::LibremetaverseClientOwner;
+pub use backend::{BackendError, BackendFuture, GridBackend, OfflineGridBackend, WorldMutator};
+pub use config::{
+    AgentConfig, BehaviorSettings, ConfigError, ConfigLoader, EndpointUrl, Environment,
+    GridConnection, Limits, LlmConnection, MapEnvironment, OperatingMode, SecretString,
+    StdEnvironment, Timeouts,
+};
+pub use service::{AgentService, ServiceError, ServiceHandle, ServiceState};
+pub use types::{
+    BoundaryError, BoundedText, BoundedVec, ControlCommand, Conversation, ConversationMessage,
+    GridEvent, GridEventKind, LlmRequest, LlmResult, MessageRole, ObservableEvent, PolicyDecision,
+    ProposedToolCall, ToolCallOutcome,
+};