Create custom subagents changedsub-agents
Nearest release: v2.1.251, published 10 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
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840840Background subagents run with a [smaller built-in tool set](#available-tools) than foreground subagents, except for conversation forks, and they surface every permission prompt in your main session. When you answer one of those prompts with a choice that lasts beyond that one tool call, such as a grant that lasts for the rest of the session, Claude Code applies your answer to the whole session, including your main conversation.
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842A background subagent can leave a background [Bash or PowerShell command](/docs/en/tools-reference#background-commands) [running past the end of its turn](/docs/en/interactive-mode#how-backgrounding-works). When that command ends, Claude Code sends the subagent a notification.
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842844A background subagent's results reach Claude as a completion notification in a later turn. Claude waits for that notification before reporting the subagent's results, and if you ask about progress first, it reports that the subagent is still running. Before v2.1.211, Claude sometimes reported results for a background subagent that hadn't finished.
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844846You can also steer this yourself:
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