gsh/input/reader

The reader module provides an event-driven terminal polling loop for raw-mode TTY input.

When operating in raw mode, user keystrokes are received as unbuffered input streams. This module wraps the low-level etch event parser to poll TTY state, filter out non-keyboard signals (such as window resizes or mouse movements), intercept control chord modifiers (e.g., Ctrl+L or Ctrl+Left), and map raw events into the shell’s structured Key domain.