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HomeDocsClaude Code CLI 9 Sep 2026
One change · claude-code

Agent SDK reference - Python changedagent-sdk/python

Nearest release: v2.1.267, published under an hour 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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First seen 14 Aug 2026 this site's first read of the page
Recorded edits61to this page, all time

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831831| `user` | `str \| None` | `None` | User identifier |
832832| `include_partial_messages` | `bool` | `False` | Include partial message streaming events. When enabled, [`StreamEvent`](#streamevent) messages are yielded |
833833| `include_hook_events` | `bool` | `False` | Include hook lifecycle events in the message stream as `HookEventMessage` objects |
834| `forward_subagent_text` | `bool` | `False` | Forward subagent text and thinking blocks in the message stream. By default only subagent `tool_use` and `tool_result` blocks are emitted. Requires Python Agent SDK 0.2.140 or later |
834| `forward_subagent_text` | `bool` | `False` | Forward subagent text and thinking blocks in the message stream. Without this option, Claude Code emits subagent `tool_use` and `tool_result` blocks but not text or thinking. Requires Python Agent SDK 0.2.140 or later |
835835| `fork_session` | `bool` | `False` | When resuming with `resume`, fork to a new session ID instead of continuing the original session |
836836| `resume_session_at` | `str \| None` | `None` | When resuming, load the conversation only up to and including the message with this UUID. Use with `resume`, and usually `fork_session`, to branch from an earlier point. Requires Python Agent SDK 0.2.137 or later |
837837| `resume_drops_turn` | `str \| None` | `None` | UUID of the user prompt whose turn a `resume_session_at` truncation discards. When set, the CLI refuses the resume if the discarded range holds entries not attributable to that turn. Requires Python Agent SDK 0.2.137 or later and Claude Code v2.1.223 or later; the CLI bundled with those SDK versions satisfies the Claude Code requirement |
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