Agent SDK reference - Python changedagent-sdk/python
Nearest release: v2.1.314, published 4 hours after upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Upstream edited this page at 29 Oct 2026 19:28 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 29 Oct 2026 19:37 UTC.
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33193319### TaskStop
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3321**Tool name:** `TaskStop`. The previous names `KillShell` and `KillBash` are still accepted as aliases.
3321**Tool name:** `TaskStop`. You can still use the previous names `KillShell` and `KillBash` in permission rules, in hook matchers, and in the `tools`, `allowed_tools`, and `disallowed_tools` options.
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