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Claude Managed Agents adds beta dynamic workflows

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The feature lets agents run phased, multi-agent workflows in the background, with setup and run tracking through the session event stream.

Claude Managed Agents now supports beta dynamic workflows, letting an agent create a program for complex tasks such as reviewing hundreds of documents. The program can run multiple agents in phases and combine their results, while the platform runs it in the background. To enable the feature, developers need the `managed-agents-2026-04-01` beta header and must set the agent’s `multiagent` field to `{"type": "multiagent_20261001", "workflows": {"type": "enabled"}}`. Developers can specify in the system prompt when an agent should start a run and track it through `workflow_run.*` events in the session event stream. The release note is dated October 9, 2026.

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