Apple's container exec --interactive --tty does not put the host
terminal into raw mode before starting its I/O relay. In cooked
(canonical) mode the kernel line discipline buffers modifier-key
escape sequences — e.g. Shift+Enter in modifyOtherKeys mode generates
\x1b[13;2~ — until a carriage-return arrives, so they never reach
Claude Code inside the container.
Add pty_forward.py, a stdlib-only wrapper (modelled on the existing
smolmachines pty_resize.py) that sets the host terminal to raw mode
via tty.setraw(), spawns the container exec command, and restores the
original terminal attributes on exit. Falls back to a bare
subprocess.run when stdin is not a TTY (piped invocations, CI) or
when termios operations fail.
Also retain the --env TERM=<host> forwarding from the previous commit:
without TERM inside the container session, Claude Code cannot determine
which modifier-key protocol to enable even with raw mode correctly set.
Non-TTY exec paths (bottle.exec, cp_in) are unaffected.
Without TERM, Claude Code inside the container cannot determine which
modifier-key protocol to enable (modifyOtherKeys / kitty). The inner
PTY session has no terminal-type context, so Shift+Enter and Enter
produce identical byte sequences (\r), making them indistinguishable.
Pass the host TERM via --env TERM=<value> on every container exec
--interactive --tty call, falling back to xterm-256color when TERM
is not set on the host. Non-TTY exec paths are unaffected.
Closes#245
didericis
didericis-claude
didericis-codex