Genesis must spawn exactly ONE task (book_research, short_story,
recipe_collection_plan, ai_article_research, blog_research, or planning).
The cascade templates handle everything downstream automatically.
This prevents Nova from skipping the book_research→book_outline pipeline
and spawning chapters/editorial tasks without proper context.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>