//! claudectl-core — foundational types and IO primitives.
//!
//! Carved out from the binary crate as the first step of the workspace
//! refactor (epic #279). The binary, TUI, brain, bus, and every future crate
//! depend on this; this crate depends on nothing claudectl-specific in
//! return. Dependency direction is enforced by CI (#277) once the rest of
//! the epic lands.