Tables (spec 4), permissions, scope resolver and table roles, canonical JSONL
and CSV codecs, per-part SHA-256 and rowsHash, manifest written last, the backup
engine with referenced-file copy into the deduplicated store, a narrow storage
interface with an in-memory implementation, Run backup now (streamed ETL), and the
Backups app home. Stand-ins for unreleased core hooks are marked in the code.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>