Book Frontmatter — Phase 02: Markdown → MDX (frontmatter-validated)

Purpose

Bring every chapter's frontmatter into compliance with the corpus schema:

• Identity: file_id (ULID), canonical_title, book_slug, chapter_number, chapter_slug, chapter_title, display_title.
• Integrity: content_class, source_type, language, word_count, char_count, estimated_reading_time, page_range_start/end, content_sha256.
• RAG metadata: key_concepts, themes, mentions_scriptures, mentions_figures, primary_topic, secondary_topics.
• Citations: citations[] with id, kind (scripture | book | article), ref.
• Vector store linkage: embedding_model, embedding_version, last_indexed_at, vector_store_ids map.
• Author + book identity: author, co_authors, year, edition, publisher, isbn, tenant, tenant_id.

Validate against scripts/lib/frontmatter-schema.ts (Zod). Validate book.json against BookManifest. Block advancement to Phase 03 on any schema failure.

Invocation

$ARGUMENTS: