Agent Journal overview

Agent Journal as a cross-cutting topic - the append-only event log that tracks run state for agent orchestration. Journal events include RUN_CREATED, EFFECT_REQUESTED, EFFECT_RESOLVED, RUN_COMPLETED, and RUN_FAILED. The journal enables deterministic replay (rebuilding run state from the event stream), recovery after interruption (resuming from the last resolved effect), and audit trails for compliance. The state cache is derived data from the journal; if it drifts, run:rebuild-state reconstructs it. Malformed entries can be repaired via run:repair-journal.