Follow Discord
Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Code CLI 21 Oct 2026
One change · claude-code

Agent SDK reference - TypeScript changedagent-sdk/typescript

Nearest release: v2.1.306, published under an hour 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 21 Oct 2026 02:01 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 21 Oct 2026 02:07 UTC.

Upstream edited
Recorded here
Lines+2added
Lines−0removed
From line 3,012 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits113to this page, all time

The whole hunk

from line 3012, old and new numbered
/
lines

This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.

from line 3012
30123012 
30133013Documentation of input schemas for built-in Claude Code tools. These types are exported from `@anthropic-ai/claude-agent-sdk/sdk-tools` and can be used for type-safe tool interactions.
30143014 
3015The `StructuredOutput` tool has no type here: Claude Code builds its input schema from the schema you pass to `outputFormat`, so there is nothing fixed to export. See [Recognize the StructuredOutput tool call](/docs/en/agent-sdk/structured-outputs#recognize-the-structuredoutput-tool-call) for what that call looks like in your message stream.
3016 
30153017### `ToolInputSchemas`
30163018 
30173019Union of tool input types exported from `@anthropic-ai/claude-agent-sdk/sdk-tools`; members include:
from line 5293
52915293};
52925294```
52935295 
5294`reason` is set when a task ends for a cause other than its own completion, failure, or stop, and requires Agent SDK v0.3.273 or later. Claude Code sets it only in sessions that connect through claude.ai: cloud sessions, including those on self-hosted runners, and Remote Control sessions. A local `query()` call never sets it. Its one value, `worker_restart`, means the Claude Code process that was running the task restarted. The notification carries status `"stopped"`, so treat the task as neither completed nor failed.
5295 
5296When Claude Code [moves a long MCP tool call to the background](/do
5296`reason` is set when a task ends for a cause other than its own completion, failure, or stop, and requires Agent SDK v0.3.273 or later. Claude Code sets it only in sessions that connect through claude.ai: cloud sessions, including those on self-ho
Feedback