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Agents now join under their model tag (e.g. "qwen2.5:3b" — model name + parameter size) or profile label, derived at /ai start and tracked on App.agent_name, so the roster shows what's actually answering. Updates the broker re-grant + /ai stop revoke paths, the Python --name default (falls back to provider.model), and the demo/bootstrap/README/docs refs. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>