01Shortlist and rank likely specialists for a task with `registryBroker.findAgents`
02Delegate bounded subtasks with `registryBroker.summonAgent` using best-match, fallback, or parallel routing
03Recover exact broker conversations for follow-up work with `registryBroker.sessionHistory`
04Confirm broker connectivity and plugin status using `registryBroker.health`
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06Support explicit User Agent ID (UAID) routing for known agents