Major changes to marketing/cover.py:
- Split evaluate_image_quality() into two purpose-built functions:
* evaluate_cover_art(): 5-rubric scoring (visual impact, genre fit, composition,
quality, clean image) with auto-fail for visible text (score capped at 4) and
deductions for deformed anatomy
* evaluate_cover_layout(): 5-rubric scoring (legibility, typography, placement,
professional polish, genre signal) with auto-fail for illegible title (capped at 4)
- Added validate_art_prompt(): pre-validates the Imagen prompt before generation —
strips accidental text instructions, ensures focal point + rule-of-thirds + genre fit
- Added _build_visual_context(): extracts protagonist/antagonist descriptions and key
themes from tracking data into structured visual context for the art director prompt
- Score thresholds raised to match chapter pipeline: ART_PASSING=7, ART_AUTO_ACCEPT=8,
LAYOUT_PASSING=7 (was: art>=5 or >0, layout breaks only at ==10)
- Critique-driven art prompt refinement between attempts: full LLM rewrite of the
Imagen prompt using the evaluator's actionable feedback (not just keyword appending)
- Layout loop now breaks early at score>=7 (was: only at ==10, so never)
- Design prompt strengthened with explicit character/visual context and NO TEXT clause
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Mike Wichers
3a42d1a339