Based on PPTAgent (EMNLP 2025) and DocPres research findings:
1. Brief summarization (summarize_brief.py)
- For content >800 chars: single LLM call extracts {overview, sections[{title,
key_points, data_points}]} before outline generation
- Prevents "lost middle" context loss in long documents
- BriefStructure.to_outline_context() formats sections for outline prompt
- BriefStructure.get_section_text(idx) returns targeted excerpt per slide
2. Section attribution in SlideOutlineModel
- Added source_section_idx: Optional[int] field
- LLM sets this during outline generation to map each slide → brief section
- Used to pass targeted section text to per-slide content generation
instead of full brief (reduces hallucination, improves accuracy)
3. Narrative continuity in slide content generation
- prev_slide_title passed to each content generation call
- Injected in user prompt: "ensure this slide continues naturally from..."
- Batch-safe: titles collected from completed batch before next starts
4. Source section text in content generation
- source_section_text parameter added to get_slide_content_from_type_and_outline
- Injected as "Source Material for This Slide" in user prompt
- Only data points present in the excerpt should be used
5. Richer layout catalog
- PresentationLayoutModel.to_catalog_string() added
- Includes field names + maxLength constraints alongside layout descriptions
- Helps LLM make informed layout choices based on content type
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Security Improvements (P0.0-P0.4):
- P0.0: Migrate to Gemini-only AI stack (simplified, single billing)
- P0.1: Fix CORS to restrict allowed origins from env (was *)
- P0.2: Remove hardcoded dev password, require env var
- P0.3: Add rate limiting (slowapi) - 3-10 req/min on sensitive endpoints
- P0.4: Add request size limits (100MB default via middleware)
New Features:
- Unified LLM service with Google Gemini priority
- OXML geometry extractor for layout parsing
- TSX validator for generated React components
- Client ID support in presentation requests with access control
- Configurable LLM/image timeouts via env vars
Modern Design System (P0.9 - partial):
- Enhanced CSS design tokens (primary, semantic colors, shadows)
- Typography scale (h1-h4, body variants, caption)
- Modern animations (fadeIn, slideIn, scaleIn)
- Updated Button component with better variants and hover effects
- Created unified Card and StatusBadge components
- Applied design system to Dashboard and Settings pages
Backend Improvements:
- Master deck parser simplification
- Slide-to-HTML endpoint cleanup (325 lines removed)
- Better error handling in prompts endpoint
Frontend Improvements:
- Settings UI simplified to show only Google/Gemini
- Dashboard uses CSS variables instead of hardcoded colors
- Improved button transitions and hover states
Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>
