Full pipeline runs end-to-end:
- All 7 pre-writing stages (seed → scene descriptions)
- Style guide generation
- Chapter writing (3 chapters, 2,833 words tested)
Fixed result extraction from graph.stream().
- Proper StateGraph with compiled nodes
- Conditional edges for writing iteration
- Checkpoint memory for resumability
- Structured state with Pydantic
- Node_validate for cross-stage validation
- Writing loop with iterate/next logic
- Full end-to-end workflow
This is the rigorous LangGraph integration.