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Claude Agent SDK 0.2.174

UpdatetodayUnverifiedAdded Oct 24, 2026

Claude Agent SDK 0.2.174 includes an update to the bundled Claude CLI version 2.1.310.

Topics: AI agents

Anthropic's release notes

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Claude Agent SDK 0.2.172

Internal/Other Changes Updated bundled Claude CLI to version 2.1.308 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.172/ bash pip install claude-agent-sdk==0.2.172

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Claude Agent SDK 0.2.173

Internal/Other Changes Updated bundled Claude CLI to version 2.1.309 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.173/ bash pip install claude-agent-sdk==0.2.173

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Claude Agent SDK 0.2.170

Bug Fixes Fixed parallel tool calls missing from session messages: get_session_messages and get_session_messages_from_store now return every tool call and result from turns that ran tools in parallel.

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Claude Agent SDK 0.2.171

Internal/Other Changes Updated bundled Claude CLI to version 2.1.307 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.171/ bash pip install claude-agent-sdk==0.2.171

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Claude Agent SDK 0.2.169

Documentation Clarified that include_hook_events does not suppress SessionStart and Setup hook events, which the CLI emits regardless of the setting Internal/Other Changes Updated bundled Claude CLI to version 2.1.305 CI: hash-pinned the release build tools (build, twine, wheel, hatchling) so a tampered or unexpected download stops the job PyPI...

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Claude Agent SDK 0.2.168

Internal/Other Changes Updated bundled Claude CLI to version 2.1.301 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.168/ bash pip install claude-agent-sdk==0.2.168

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Claude Agent SDK 0.2.166

New Features Hook-specific output types: Added typed output classes and missing input fields for hooks, giving hook implementations precise type information instead of untyped dicts SystemInitData TypedDict: The init system message payload is now fully typed via SystemInitData, along with nested types SystemInitMcpServer, SystemInitPlugin...

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Updateunverified

Claude Agent SDK 0.2.167

Internal/Other Changes Updated bundled Claude CLI to version 2.1.300 PyPI: https://pypi.org/project/claude-agent-sdk/0.2.167/ bash pip install claude-agent-sdk==0.2.167

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Also shipped on Oct 24, 2026

Anthropic in October 2026