Scene Change Tape Afteruse Receipt Mechanics

The scene-change tape docket is a state-pressure mechanic. It opens only when a named future reader or route tries to spend one old floor mark beyond its original cue and blocking lane.

Required runtime surfaces:

• source tape row, original blocking lane, and cue context;
• stage manager or explicit absence;
• requested afteruse and future reader;
• harmed crew or performer, or explicit absence;
• proof bridge such as a stage-manager call sheet, rehearsal still, or correction log;
• branch state and counter deltas visible in replay.

The mechanic must never turn one tape strip into blanket stage clearance or performer consent.