Source Provenance Guard

Prevent cross-task state leakage before an edit or delivery step.

• Inspect the active workspace and validate the bound job, source asset, source scope, active plan, edit session, cover, subtitle draft, and output references.
• Treat a same-source upload as a new task unless the user explicitly asks to continue the previous task.
• Never reuse a previous task's time range, cover, subtitle draft, candidate selection, timeline, render, or progress state as the current task's result.
• Return a clear prerequisite or mismatch diagnosis instead of repairing by silently switching jobs.
• This Skill does not render or export media.