Completes the remote-drive triad for a broker-owned sandbox the operator can't
exec into directly: keys (in) → watch (wait) → screen (out).
- _sbx:data PTY-relay frames are absorbed into a capped rolling terminal buffer
(not surfaced as chat); `screen` returns it ansi-stripped (or raw). sandbox.
strip_ansi handles CSI/OSC/CR noise so output greps cleanly.
- `watch` is a formal stop-condition engine: blocks until a regex matches in the
screen buffer or chat events, or an idle-quiescence window, or a hard timeout,
then reports which fired — the autonomy loop's principled wait.
- Skill doctrine updated with the type→wait→read relay loop.
28 offline tests green.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
leetcrypt
338e843e85