PAUSE stores the lane the print needs (AFC's next_lane during a failed tool change, otherwise the loaded lane). RESUME stops with an error when another lane or none is loaded; RESUME LANE_CHECK=0 skips the check. AFC_CLEAR_ALL_MESSAGES clears AFC's whole message queue (AFC_CLEAR_MESSAGE only removes the first message). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>