Use Claude Code features in the SDK changedagent-sdk/claude-code-features
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296296| Run deterministic logic on tool calls (audit, block, transform) | [Hooks](/docs/en/agent-sdk/hooks) | `hooks` parameter with callbacks, or shell scripts loaded via `settingSources` |
297297| Give Claude structured tool access to an external service | [MCP](/docs/en/agent-sdk/mcp) | `mcpServers` parameter |
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299<Tip>
300 **Subagents versus agent teams:** Subagents are ephemeral and isolated: fresh conversation, one task, summary returned to parent. Agent teams coordinate multiple independent Claude Code instances that share a task list and message each other directly. Agent teams are a CLI feature. See [What subagents inherit](/docs/en/agent-sdk/subagents#what-subagents-inherit) and the [agent teams comparison](/docs/en/agent-teams#compare-with-subagents) for details.
301</Tip>
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303299Every feature you enable adds to your agent's context window. For per-feature costs and how these features layer together, see [Extend Claude Code](/docs/en/features-overview#understand-context-costs).
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305301## Related resources
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