アーキテクチャパターン
K Savedvariables
Database schema and persistence layer for BookArchivist. Covers BookArchivistDB structure, book entry schema, Repository pattern for dependency injection, indexes (item/object/title), migrations (v1→v2), and data flow patterns. Use when working with saved data, database access, or understanding persistence. Triggers: database, BookArchivistDB, schema, booksById, indexes, Repository, persistence, migration.