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Sweep 22 Sep 2026 · 15:52Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
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Agent SDK reference - Python changed

agent-sdk/python

Nearest release: v2.1.280, published 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 22 Sep 2026 14:15 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 22 Sep 2026 14:37 UTC.

Upstream edited
Recorded here
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From line 1,543 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits28to this page, all time

The whole hunk

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15431543| `error` | [`AssistantMessageError`](#assistantmessageerror) ` \| None` | Error type if the response encountered an error |
15441544| `usage` | `dict[str, Any] \| None` | Per-message token usage (same keys as [`ResultMessage.usage`](#resultmessage)) |
15451545| `message_id` | `str \| None` | API message ID. Multiple messages from one turn share the same ID |
1546| `stop_reason` | `str \| None` | Stop reason from the API (e.g. `end_turn`, `tool_use`) |
1546| `stop_reason` | `str \| None` | Stop reason from the API (for example, `end_turn`, `tool_use`) |
15471547| `session_id` | `str \| None` | ID of the session this message belongs to |
15481548| `uuid` | `str \| None` | Unique message identifier within the session transcript |
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33693369| `allowManagedDomainsOnly` | `bool` | `False` | Managed-settings only: when set in managed settings, ignore `allowedDomains` and `WebFetch(domain:...)` allow rules from non-managed settings sources. Has no effect when set via SDK options |
33703370| `allowUnixSockets` | `list[str]` | `[]` | macOS only: Unix socket paths that processes can access, such as the Docker socket. Ignored on Linux |
33713371| `allowAllUnixSockets` | `bool` | `False` | Allow access to all Unix sockets |
3372| `allowLocalBinding` | `bool` | `False` | Allow processes to bind to local ports (e.g., for dev servers) |
3372| `allowLocalBinding` | `bool` | `False` | Allow processes to bind to local ports (for example, for dev servers) |
33733373| `allowMachLookup` | `list[str]` | `[]` | macOS only: XPC/Mach service names to allow. Supports a trailing wildcard |
33743374| `httpProxyPort` | `int` | `None` | HTTP proxy port for network requests |
33753375| `socksProxyPort` | `int` | `None` | SOCKS proxy port for network requests |