//! Memory system traits and data types
//!
//! Core trait definitions for the memory subsystem. Concrete implementations
//! live in `echo_state`.
//!
//! | Trait | Purpose |
//! |-------|---------|
//! | [`Store`] | Long-term KV storage with namespace isolation |
//! | [`Embedder`] | Text-to-vector embedding interface |
//! | [`ConversationStore`] | Conversation persistence (transcript read-model) |
//! | [`Checkpointer`] | Short-term thread state persistence |
pub use ;
pub use ;
pub use Embedder;
pub use ;