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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 23 Oct 2026
One change · api

sessions changedmanaged-agents/sessions

Nearest release: v2.1.309, published 3 hours before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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Lines+2added
Lines−2removed
From line 567 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits20to this page, all time

The whole hunk

from line 567, old and new numbered
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from line 567
567567 id: $agent->id,
568568 model: ['id' => 'claude-sonnet-5-5'],
569569 );
570 // Clear the system prompt for this session. Array access is load-bearing here:
570 // Clear the system prompt for this session. Array access is required here:
571571 // create() strips nulls from raw arrays and ::with() treats null args as omitted.
572572 $overrides['system'] = null;
573573 
from line 967
967967 
968968## Starting the session
969969 
970Creating a session without `initial_events` (java, php: `initialEvents`; csharp, go: `InitialEvents`) registers the session but does not start any work; the environment's sandbox begins provisioning as soon as the session is created, so the first tool call does not wait on it. To delegate a task, send events to the session using a [user event](https://platform.claude.com/docs/en/managed-agents/reference#event-types). To supply the first event in the create request instead, see [Seed the session with initial events](https://platform.claude.com/docs/en/managed-agents/sessions#seed-the-session-with-initial-events). The session acts as a state machine that tracks progress while events drive the actual execution.
970Creating a session without `initial_events` (java, php: `initialEvents`; csharp, go: `InitialEvents`) registers the session but does not start any work; the environment's sandbox starts provisioning as soon as the session is created, so the first tool call does not wait on it. To delegate a task, send events to the session using a [user event](https://platform.claude.com/docs/en/managed-agents/reference#event-types). To supply the first event in the create request instead, see [Seed the session with initial events](https://platform.claude.com/docs/en/managed-agents/sessions#seed-the-session-with-initial-events). The session acts as a state machine that tracks progress while events drive the actual execution.
971971 
972972<CodeGroup>
973973 ```bash cURL
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