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claude_agent_sdk_python_releases · Oct 14, 2026 · release
Source brief
claude-agent-sdk-python v0.2.166
github.comOct 14, 2026
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Release highlights
- Hook-specific output types : Added typed output classes and missing input fields for hooks, giving hook implementations precise type information instead of u...
- SystemInitData TypedDict : The init system message payload is now fully typed via SystemInitData , along with nested types SystemInitMcpServer , SystemInitPl...
- Fixed SandboxSettings.ignoreViolations type : Changed from a TypedDict with file / network keys to dict[str, list[str]] to match the CLI's actual schema — a...
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