Use follows and blocks as source-labeled fractional assertions in trust paths and relative reputation. Keep explicit vouches first and preserve integer-only publication. Default to participant-only ingestion. Gate all observed authors with a second flag. Isolate caches and replay cursors by feature mode, and invalidate path dependencies by collection and original record key. Document data-volume and replay-gap limits. Cover migrations, source precedence, replay, snapshots, subscriptions, and fractional scores. Task: tsk-22