b0fad35dfb
While a turn runs the main thread is blocked in the conversation loop, so nothing reads the keyboard. Add an EscapeInterruptMonitor that, for the duration of a turn on an interactive terminal, switches stdin to a minimal non-canonical mode (echo/line-buffering off; ISIG and output processing untouched, unlike full raw mode) and polls for a lone ESC byte. Escape sequences such as arrow keys are recognized and swallowed. On Esc it trips the TurnInterruptSignal: the in-flight request is aborted and control returns to the REPL prompt with the session intact. Permission prompts read whole lines from stdin mid-turn, so stdin ownership is coordinated through a StdinPromptGate: while a prompt holds a lease the listener restores canonical mode and stops consuming bytes. Also: - spinner shows '(esc to interrupt)' and the banner/help mention Esc - WorkerStatus/WorkerEventKind gain an 'interrupted' lifecycle state - non-terminal stdin and non-unix platforms skip the listener; Ctrl+C interruption still works there Closes the Esc-to-interrupt feature request (#3196). |
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