Reconcile

Purpose

As a session winds down — or once a batch of background work has finished — two things drift out of sync with reality: off-thread work that has completed but is still tracked as if it were running, and the task ledger, which still shows as open work that is actually done. This skill reconciles both against their real state: it inventories the off-thread work this session spawned, inspects each item's actual output, retires the ones genuinely finished, and squares this session's task ledger with what actually happened. It also reports the liveness of sibling sessions in the same project — read-only, because it cannot control them.