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 14 Oct 2026
One change · claude-code

Agent SDK reference - TypeScript changedagent-sdk/typescript

Nearest release: v2.1.300, published 3 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 14 Oct 2026 17:39 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 14 Oct 2026 18:07 UTC.

Upstream edited
Recorded here
Lines+1added
Lines−1removed
From line 2,236 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 2236, 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 2236
22362236* `fromMode`: the sending session's permission class, `bypass` or `prompting`, declared by a host that relays a peer message between your sessions, such as the [desktop app](/docs/en/desktop#work-across-sessions). Claude Code reads it in the receiving session when it applies the [inbound controls](/docs/en/cross-session-messaging#control-inbound-messages). Requires Agent SDK v0.3.234 or later.
22372237* `senderTaskId`: the teammate's task ID. Absent for a cross-session peer.
22382238* `name`: the sender's display name, normalized by Claude Code: it strips Unicode control, format, surrogate, and line or paragraph separator code points, then trims the result and caps it at 64 code points with an ellipsis. Requires Claude Code v2.1.205 or later.
2239* `body`: the decoded message body with the peer envelope stripped, byte-exact with what the model sees. Always present for a teammate message; for a cross-session peer, present only when the turn is exactly one peer envelope formed by Claude Code. Render `name` and `body` instead of re-parsing the message text. Requires Claude Code v2.1.205 or later.
2239* `body`: the decoded message body with the peer envelope stripped, byte-exact with what the model sees. Present for a single teammate message, absent when several are merged; for a cross-session peer, present only when the turn is exactly one peer envelope formed by Claude Code. Render `name` and `body` instead of re-parsing the message text. Before v2.1.299, merged messages kept the first message's `body`. Requires Claude Code v2.1.205 or later.
22402240* `fromSession`: the sender's host-openable session ID, set by the sender's host so your UI can link back to the sending session. Like `from`, it is sender-asserted: use it as a navigation target only, and don't treat it as proof of the sender's identity. Requires Claude Code v2.1.216 or later.
22412241* `verifiedPeerPid`: the process ID of the process that connected to this session's cross-session messaging socket, verified by the kernel and read from the connection itself, never from the payload. Use it, not `from`, to identify the sender: `from` is forgeable by any same-user process. The field is absent when Claude Code can't verify it, such as on Windows or non-socket ingress, so an absent value means the sender is unverified. For relayed traffic it identifies the relay rather than the message's author, and process IDs are recyclable, so treat it as provenance rather than an authentication token. Requires Claude Code v2.1.216 or later.
22422242 
from line 5268
52685268 
52695269Claude Code prepends a notice to every task notification it sends to the model, except deliveries stamped with the [`scheduled-trigger` subkind](#task-notification-subkinds), which carry an assigned-task framing instead. The notice states that no human input has occurred, so the model doesn't treat the notification as a user instruction or approval.
52705270 
5271To detect a task-notification turn, check `origin.kind === "task-notification"` on the [`SDKUserMessage`](#sdkusermessage) or [`SDKResultMessage`](#sdkresultmessage) rather than matching on the notice text. Read `subkind` from the same field if you need to know what raised it. Before v2.1.205, Claude Code left the
5271To detect a task-notification turn, check `origin.kind === "task-notification"` on the [`SDKUserMessage`](#sdkusermessage) or [`SDKResultMessage`](#sdkresultmessage) rather than matching on the notice text. Read `subk
Feedback