docs(prompting): adopt 5-aspect video specification across skills

Incorporate the structured taxonomy from Lin et al. "Building a Precise
Video Language with Human-AI Oversight" (CMU/Harvard, arXiv 2604.21718v2).
The paper proves prompts structured around five aspects (Subject /
Subject Motion / Scene / Spatial Framing / Camera) unlock controllable
cinematography in fine-tuned video generation models. Off-the-shelf VLMs
already nail subject and scene; the gains live in motion, spatial, and
camera, which prompts routinely omit.

Universal layer (skills/creative/video-gen-prompting.md, +125 lines):
- 5-aspect prompt skeleton replaces flat formula
- Camera movements regrouped (translation / rotation / lens-only) with
  dolly!=zoom, pan!=truck, bird's-eye!=aerial disambiguations
- New primitive tables: camera height, camera angle, POV, lens
  distortion (fisheye vs barrel), focus / DoF (rack / pull / tracking),
  playback speed (6 modes), subject transitions
- Order-matters and self-contained-prompt rules
- Identity anchoring rule for multi-shot
- Strict static-shot rule, anti-subjective callout, overlays-not-depth
- Per-model word-count guidance

Per-model guides (sora, veo, hunyuan, ltx, seedance):
- Add the primitives each model honors literally
- Word-count sweet spots per model
- Strengthen seedance verbatim-identity and subject-transition guidance

Pipeline directors (cinematic / explainer / animation scene-director,
cinematic / explainer asset-director):
- 5-aspect scene-plan checklist (per-pipeline adapted)
- Overlays-not-depth callout
- Pre / critique / post self-review loop for generation prompts

Reviewer (skills/meta/reviewer.md):
- CHAI critique-quality rules: accurate / complete / constructive
- Critical findings now require a proposed_fix

Storytelling, cinematic, broll, video-reference-analyst:
- Anti-subjective rule (replace mood adjectives with visual causes)
- Camera-intent-per-beat for script writers
- POV column in stock-footage query templates
- 5-aspect structured output mandatory for reference-video analysis

skills/INDEX.md: video-gen-prompting marked as canonical 5-aspect spec.

skills/creative/cinematic.md

@@ -3,6 +3,8 @@
 > Sources: No Film School editorial guides, StudioBinder filmmaking resources, Film Riot
 > production tutorials, CinematographyDB shot databases, Walter Murch "In the Blink of an Eye"
 
+> For the universal cinematography vocabulary (camera, lens, motion, focus primitives, plus the 5-aspect Subject / Subject Motion / Scene / Spatial Framing / Camera spec), see `skills/creative/video-gen-prompting.md`. This file layers cinematic-specific conventions on top of those primitives — it does not redefine them.
+
 ## Quick Reference Card
 
 ```
@@ -16,6 +18,19 @@ MUSIC:            60-90 BPM, orchestral or ambient, dynamic (not loop-based)
 TARGET LUFS:      -14 LUFS integrated, -24 LUFS for quiet moments
 ```
 
+## Replace Mood Adjectives with Visual Causes
+
+> **"Cinematic" and "epic" don't constrain pixels.** The cinematic look comes from concrete choices: aspect ratio, lens, lighting key, color grade, shot duration, and audio layer count. State those — the rest is decoration.
+>
+> The CMU/Harvard CHAI study showed subjective phrasing varies wildly across annotators and model interpretations, which means a beat tagged "moody" routes to a different visual every render. Replace the adjective with the lighting + grade + shot-duration combination that produces moodiness. See `skills/creative/storytelling.md` "Anti-Subjective Rule" for the script-side equivalent.
+>
+> | Mood adjective | Cinematic translation |
+> |---|---|
+> | "epic" | 2.39:1 letterbox, 24fps, 8s+ shot duration, orchestral score with crescendo |
+> | "moody" | `moody_dark` grade at 0.6, key light at 1/8 fill, 6s+ contemplative shots, ambient bed at -28dB |
+> | "intimate" | 1.85:1, 40-50mm equivalent, shallow DoF, 2 audio layers (dialogue + room tone), no music under dialogue |
+> | "cinematic" | (this word is banned — pick one of the above or describe the actual choices) |
+
 ## Aspect Ratios
 
 | Ratio | Resolution (in 1080p frame) | Feel | When to Use |
@@ -113,6 +128,7 @@ Add a subtle ambient layer to fill silence and create depth:
 - Highlights should be slightly rolled off (never pure white)
 - Skin tones must stay on the vectorscope skin tone line
 - Consistency across all clips — one LUT/profile for the entire video
+- **If a beat is described as "moody," rewrite as the lighting + grade + shot-duration combination that produces moodiness.** Don't pass mood adjectives to the asset/edit stages.
 
 ## Applying to OpenMontage