Use when running a native Slack agent via Tag with decoupled UI, fan-out code review, agent-written MapReduce harness, HTML artifacts, and daily loops. Triggers on "Slack Tag", "Slack agent", "fan-out review", "MapReduce harness". Non-triggers: file-only async work with no Slack surface (use claude-cowork-patterns). Outcome: a Slack-native Tag operator with mock-to-monitor funnel and adversarial review.
