When this leg closed (null while still open).
Why this leg closed (null while open / legacy rows).
This leg's delegated-run previews (oldest first, minus its co-agent observability run).
MJ: AI Agent Sessions.ID of this leg.
When this leg started (__mj_CreatedAt).
This leg's chronological caption turns (oldest first).
One LEG of a reviewed session chain: a single
MJ: AI Agent Sessionsrow plus its own caption turns and delegated-run previews. A session resumed vialastSessionIdchains legs together (newest leg'sLastSessionID→ prior leg); the review loader walks that chain BACKWARDS (capped — see the loader docs) so review mode can render the FULL conversation arc chronologically, with a divider between legs.