//! Common entity types shared across the Zesdex application.
//!
//! Contains pure data structures for conversations, messages, tool calls,
//! usage statistics, provider API types (chat request/response, SSE stream),
//! and store path configuration. All types derive `Serialize`/`Deserialize`
//! and are persisted as JSON files.
//!
//! # Sub-modules
//!
//! - [`conversation`] — Ordered conversation (vector of `ChatMessage`)
//! - [`message`] — `ChatMessage` + `Role` enum
//! - [`provider`] — LLM provider API types: `ChatRequest`, `ChatResponse`,
//!   `StreamEvent`, `SseParser`, `ToolDef`, etc.
//! - [`store`] — `Store` paths for data directories
//! - [`tool_call`] — `ToolCall` + `ToolFunction` (function-calling request)
//! - [`tool_result`] — `ToolCallResult` (function-calling response)
//! - [`usage`] — `UsageStats` (token counts, costs)

pub mod conversation;
pub mod message;
pub mod provider;
pub mod store;
pub mod tool_call;
pub mod tool_result;
pub mod usage;

pub use conversation::Conversation;
pub use message::{ChatMessage, Role};
pub use provider::{
    ChatRequest, ChatResponse, Choice, SseParser, StreamEvent, StreamOptions, ToolDef,
    ToolFunctionDef,
};
pub use store::Store;
pub use tool_call::{ToolCall, ToolFunction};
pub use tool_result::ToolCallResult;
pub use usage::UsageStats;