//! Terminal use cases (ARCHITECTURE §6, L3).
//!
//! Each use case is a struct carrying its ports as `Arc<dyn Port>` and exposing a
//! single `execute(input) -> Result<output, AppError>` method (**Single
//! Responsibility**). They talk **only** to the [`domain::ports::PtyPort`] (plus
//! the [`domain::ports::EventBus`] for `OpenTerminal`); the composition root
//! injects the concrete [`infrastructure::PortablePtyAdapter`].
//!
//! - [`OpenTerminal`] — resolve the cwd, spawn a PTY, create a
//!   [`domain::TerminalSession`], register the live handle, publish an event.
//! - [`WriteToTerminal`] — forward bytes (keystrokes) to a PTY.
//! - [`ResizeTerminal`] — resize a PTY.
//! - [`CloseTerminal`] — kill a PTY and forget its handle.
//!
//! # Where the active-session registry lives, and why
//!
//! The domain [`PtyPort`] is *handle-oriented*: `spawn` returns a
//! [`domain::ports::PtyHandle`] that every later call (`write`/`resize`/`kill`)
//! must reference. Something has to remember, per [`SessionId`], the live
//! `PtyHandle` (and the `TerminalSession` snapshot) between IPC calls. That state
//! is **not domain state** (it is the in-flight wiring of an I/O resource), and
//! it must not live in the adapter alone (other use cases need to address a
//! session by id). It therefore lives in [`TerminalSessions`], an **application
//! service** injected into the terminal use cases (and held in the composition
//! root behind an `Arc`). This keeps the domain pure and the registry shared,
//! testable, and transport-agnostic.

mod registry;
mod usecases;

pub use registry::{
    LiveAgentRegistry, LiveSessionKind, LiveSessionSnapshot, LiveSessions, StructuredSessions,
    TerminalSessions,
};
pub use usecases::{
    CloseTerminal, CloseTerminalInput, CloseTerminalOutput, OpenTerminal, OpenTerminalInput,
    OpenTerminalOutput, ResizeTerminal, ResizeTerminalInput, WriteToTerminal, WriteToTerminalInput,
};