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Sweep 25 Sep 2026 · 19:33Z Build v2.1.283 504 read Stable v2.1.274 Latest v2.1.283 Next v2.1.283 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 25 Sep 2026
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Agent SDK reference - TypeScript changedagent-sdk/typescript

Nearest release: v2.1.283, published 4 hours 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 25 Sep 2026 23:19 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 25 Sep 2026 23:37 UTC.

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First seen 14 Aug 2026 this site's first read of the page
Recorded edits58to this page, all time

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15401540The `uuid`s of every message you sent that Claude Code answered in this turn. When you send several messages close together, Claude Code can merge them into one turn, and `user_message_uuid` then names only the last of them. To match the reply to any of the merged messages, look for that message's `uuid` anywhere in this list. Requires Agent SDK v0.3.259 or later.
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1542Claude Code sets the list together with `user_message_uuid` on each reply frame that carries that field and on the result. For the full set of frames that carry `user_message_uuid`, and the version each requires, see [`user_message_uuid`](#user_message_uuid). The list always contains `user_message_uuid` and holds at most 64 entries.
1542Claude Code sets the list together with `user_message_uuid` on each reply frame that carries that field and on the result. For the full set of turn frames that echo the answered message's `uuid`, and the version each requires, see [`user_message_uuid`](#user_message_uuid). The list always contains `user_message_uuid` and holds at most 64 entries.
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15441544When Claude Code picks up a regular message you sent while a turn was running, it adds that message's `uuid` to the result's list.
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23432343#### `TeammateIdleHookInput`
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23452345```typescript theme={null}
2346type TeammateIdleHookInput = BaseHookInput & {
2347 ho
2346type TeammateIdleHookInput = BaseHook
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