Add App core struct with event-handling and initialization logic for TUI.

crates/owlen-core/src/lib.rs

@@ -0,0 +1,58 @@
+//! Core traits and types for OWLEN LLM client
+//!
+//! This crate provides the foundational abstractions for building
+//! LLM providers, routers, and MCP (Model Context Protocol) adapters.
+
+pub mod config;
+pub mod conversation;
+pub mod formatting;
+pub mod input;
+pub mod model;
+pub mod provider;
+pub mod router;
+pub mod session;
+pub mod types;
+
+pub use config::*;
+pub use conversation::*;
+pub use formatting::*;
+pub use input::*;
+pub use model::*;
+pub use provider::*;
+pub use router::*;
+pub use session::*;
+pub use types::*;
+
+/// Result type used throughout the OWLEN ecosystem
+pub type Result<T> = std::result::Result<T, Error>;
+
+/// Core error types for OWLEN
+#[derive(thiserror::Error, Debug)]
+pub enum Error {
+    #[error("Provider error: {0}")]
+    Provider(#[from] anyhow::Error),
+
+    #[error("Network error: {0}")]
+    Network(String),
+
+    #[error("Authentication error: {0}")]
+    Auth(String),
+
+    #[error("Configuration error: {0}")]
+    Config(String),
+
+    #[error("I/O error: {0}")]
+    Io(#[from] std::io::Error),
+
+    #[error("Invalid input: {0}")]
+    InvalidInput(String),
+
+    #[error("Operation timed out: {0}")]
+    Timeout(String),
+
+    #[error("Serialization error: {0}")]
+    Serialization(#[from] serde_json::Error),
+
+    #[error("Unknown error: {0}")]
+    Unknown(String),
+}