Captions Overlay Doctrine Overlay doctrine — supplements the upstream skill's . Applies ON TOP of it; do not expect it folded into the upstream skill. Two ideas combine here. First, the caption model — every spoken phrase is , , or , and embed is the scarce earned peak, not the default. Second, the overlay law — a caption line is composited ON TOP of the film as an overlay; it is NOT a reserved zone, so you never shift content up or leave a dead band to "make room" for it. The two reinforce each other: because captions ride as an overlay (the verbatim rail in front, the occasional embed behin…