Agent SDK reference - TypeScript changedagent-sdk/typescript
Nearest release: v2.1.318, published an hour before 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 3 Nov 2026 23:05 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 3 Nov 2026 23:07 UTC.
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from line 2179
21792179 level: "info" | "notice" | "suggestion" | "warning";
21802180 tool_use_id?: string;
21812181 prevent_continuation?: boolean;
2182 tag?: string;
21822183 uuid: UUID;
21832184 session_id: string;
21842185};
from line 2555
25542555 matcher?: string;
25552556 hooks: HookCallback[];
25562557 timeout?: number; // Timeout in seconds for all hooks in this matcher
2558 onFailure?: "continue" | "block"; // "block" blocks the action when a callback fails
25572559}
25582560```
25592561
2562To decide what `onFailure` covers, see [Block the action when a callback fails](https://code.claude.com/docs/en/agent-sdk/hooks.md#block-the-action-when-a-callback-fails).
2563
25602564### `HookInput`
25612565
25622566Union type of all hook input types.
from line 4793
47894793type PushNotificationOutput = {
47904794 message: string;
47914795 pushSent?: boolean;
4792 localSent?: boolean;
4793 disabledReason?: "config_off" | "user_present" | "no_transport";
4794 sentAt?: string;
4795};
4796```
4797
4798Returns delivery details, including whether a push or local notification was sent and why delivery was skipped.
4799
4800### ReportFindings
4801
4802**Tool name:** `ReportFindings`
4803
4804``
4796 localSe
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