| name | narration-slide-division |
| description | Split content between the voice and the slide so they complement instead of repeat. Use at node 03 (script / cue-plan) AND node 04 (visual / slide copy) when authoring any beat that has both narration and on-screen text โ the anti-duplication contract that keeps the voice from reading the slide aloud. |
Narration โ Slide Division
The content-side sibling of render-lab-design-system's "Quality bar": that skill answers "is this good to look at?"; this one answers "is the voice doing a different job from the slide?". It is one contract read by BOTH node 03 (narration / cue plan) and node 04 (slide copy) โ the division is a relationship between two artifacts, so neither single-artifact skill can own it. Caption emphasis text stays governed by caption-and-emphasis (it already forbids captions that repeat narration); this skill governs the slide text / title / slot strings vs the cue narration.
The spine
The slide carries the NOUN. The voice carries the VERB / the WHY.
- SLIDE = the nouns to SEE and remember โ product name, number, model list, price, label, the one turn-word, the real UI. Things that are wrong to merely hear and right to read. Concrete, scannable, permanent.
- VOICE = the connective tissue to FEEL/UNDERSTAND but not read โ motivation, the so-what, the causal bridge between beats, the stance/judgment, the segue into the next idea. Transient, conversational, forward-moving.
Anti-duplication gate (the one to enforce)
This is the Redundancy Principle (Mayer & Clark, e-Learning and the Science of Instruction, ch.7): identical on-screen text + narration lowers comprehension โ the eye can process one visual at a time, and the viewer wastes effort cross-checking text against voice.
The delete-the-overlap test, per beat:
