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Sweep 28 Sep 2026 · 18:16Z Build v2.1.284 505 read Stable v2.1.277 Latest v2.1.284 Next v2.1.284 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Developer Platform 29 Sep 2026
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Events changedapi/beta/sessions/events

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From line 57 where the diff opens
First seen 14 Aug 2026 this site's first read of the page
Recorded edits15to this page, all time

### Beta Managed Agents Session Event Type

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from line 57
5757 
5858 Opaque pagination cursor from a previous response's `next_page`.
5959 
60- `types: optional array of string`
60- `types: optional array of BetaManagedAgentsSessionEventType`
6161 
6262 Filter by event type. Values match the `type` field on returned events (for example, `user.message` or `agent.tool_use`). Omit to return all event types.
6363 
64 - `"user.message"`
65 
66 - `"user.interrupt"`
67 
68 - `"user.tool_confirmation"`
69 
70 - `"user.custom_tool_result"`
71 
72 - `"agent.custom_tool_use"`
73 
74 - `"agent.message"`
75 
76 - `"agent.thinking"`
77 
78 - `"agent.mcp_tool_use"`
79 
80 - `"agent.mcp_tool_result"`
81 
82 - `"agent.tool_use"`
83 
84 - `"agent.tool_result"`
85 
86 - `"agent.thread_message_received"`
87 
88 - `"agent.thread_message_sent"`
89 
90 - `"agent.thread_context_compacted"`
91 
92 - `"session.error"`
93 
94 - `"session.status_rescheduled"`
95 
96 - `"session.status_running"`
97 
98 - `"session.status_idle"`
99 
100 - `"session.status_terminated"`
101 
102 - `"session.thread_created"`
103 
104 - `"span.outcome_evaluation_start"`
105 
106 - `"span.outcome_evaluation_end"`
107 
108 - `"span.model_request_start"`
109 
110 - `"span.model_request_end"`
111 
112 - `"span.outcome_evaluation_ongoing"`
113 
114 - `"user.define_outcome"`
115 
116 - `"session.thread_status_running"`
117 
118 - `"session.thread_status_idle"`
119 
120 - `"session.thread_status_terminated"`
121 
122 - `"user.tool_result"`
123 
124 - `"session.thread_status_rescheduled"`
125 
126 - `"session.updated"`
127 
128 - `"system.message"`
129 
130 - `"session.usage"`
131 
64132### Headers
65133 
66134- `"anthropic-beta": optional array of AnthropicBeta`
from line 1763
16951763 
16961764 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
16971765 
1698 - `string`
1766 - `"claude-sonnet-5-5" or "claude-opus-5-5" or "claude-fable-5-1" or 13 more`
16991767 
1700 - `"claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more`
1701 
17021768 The model that will power your agent.
17031769 
17041770 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
17051771 
1772 - `"claude-sonnet-5-5"`
1773 
1774 Efficient model for coding and agents
1775 
17061776 - `"claude-opus-5-5"`
17071777 
17081778 Powerful intelligence for coding, knowledge work, and long-running agents
from line 1783
17131783 
17141784 - `"claude-sonnet-5"`
17151785 
1716 High-performance model for coding and agents
1786 Efficient model for coding and agents
17171787 
17181788 - `"claude-fable-5"`
17191789 
from line 1833
17631833 
17641834 High-performance model for agents and coding
17651835 
1836 - `string`
1837 
17661838 - `effort: optional BetaManagedAgentsEffortLow or BetaManagedAgentsEffortMedium or BetaManagedAgentsEffortHigh or 2 more`
17671839 
17681840 How hard Claude works on each inference call. One of `low`, `medium`, `high`, `xhigh`, `max`. Always present; resolved to the per-model default at save time when not supplied.
from line 5149
50775149 
50785150 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
50795151 
5080 - `string`
5152 - `"claude-sonnet-5-5" or "claude-opus-5-5" or "claude-fable-5-1" or 13 more`
50815153 
5082 - `"claude-opus-5-5" or "claude-fable-5-1" or "claude-sonnet-5" or 12 more`
5083 
50845154 The model that will power your agent.
50855155 
50865156 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
50875157 
5158 - `"claude-sonnet-5-5"`
5159 
5160 Efficient model for coding and agents
5161 
50885162 - `"claude-opus-5-5"`
50895163 
50905164 Powerful intelligence for coding, knowledge work, and long-running agents
from line 5169
50955169 
50965170 - `"claude-sonnet-5"`
50975171 
5098 High-performance model for coding and agents
5172 Efficient model for coding and agents
50995173 
51005174 - `"claude-fable-5"`
51015175 
from line 5219
51455219 
51465220 High-performance model for agents and coding
51475221 
5222 - `string`
5223 
51485224 - `effort: optional BetaManagedAgentsEffortLow or BetaManagedAgentsEffortMedium or BetaManagedAgentsEffortHigh or 2 more`
51495225 
51505226 How hard Claude works on each inference call. One of `low`, `medium`, `high`, `xhigh`, `max`. Always present; resolved to the per-model default at save time when not supplied.
from line 8910
88348910 
88358911 Unique identifier for this event.
88368912 
8837 - `content: array of BetaManagedAgentsTextBlock or BetaManagedAgentsImageBlock or BetaManagedAgentsDocumentBlock or BetaManagedAgentsRedactedBlock`
8838 
8839 Array of content blocks comprising the user message.
8840 
8841 - `BetaManagedAgentsTextBlock object`
8842 
8843 Regular text content.
8844 
8845 - `type: "text"`
8846 
8847 - `text: string`
8848 
8849 The text content.
8850 
8851 minLength: 1
8852 
8853 - `BetaManagedAgentsImageBlock object`
8854 
8855 Image content specified directly as base64 data or as a reference via a URL.
8856 
8857 - `type: "image"`
8858 
8859 - `source: BetaManagedAgentsBase64ImageSource or BetaManagedAgentsURLImageSource or BetaManagedAgentsFileImageSource`
8860 
8861 The source of the image data.
8862 
8863 - `BetaManagedAgentsBase64ImageSource object`
8864 
8865 Base64-encoded image data.
8866 
8867 - `type: "base64"`
8868 
8869 - `data: string`
8870 
8871 Base64-encoded image data.
8872 
8873 minLength: 1
8874 
8875 - `media_type: string`
8876 
8877 MIME type of the image (e.g., "image/png", "image/jpeg", "image/gif", "image/webp").
8878 
8879 minLength: 1
8880 
8881 - `BetaManagedAgentsURLImageSource object`
8882 
8883 Image referenced by URL.
8884 
8885 - `type: "url"`
8886 
8887 - `url: string`
8888 
8889 URL of the image to fetch.
8890 
8891 minLength: 1
8892 
8893 - `BetaManagedAgentsFileImageSource object`
8894 
8895
8913 - `content: array of BetaManagedAgentsTextBlock or BetaManagedAgentsImageBlock or BetaManagedAgentsDocumentBlock or BetaManagedAg
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