Events changedapi/beta/sessions/events
Nearest release: v2.1.294, published an hour after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.
Recorded here
Lines+329added
Lines−9removed
From line
1,477
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits21to this page, all time
The whole hunk
from line 1477, old and new numbered
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This page is larger than the 256 KiB this site keeps, so one side of the diff below stops where the stored text does.
The two sides of this change are more than 400 edits apart, too far apart to line up, so this is the differ's own diff of it and the words inside a line are not marked.
from line 1477
14771477
14781478 - `BetaManagedAgentsSessionThreadCreatedEvent object`
14791479
1480 Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation.
1480 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
14811481
14821482 - `type: "session.thread_created"`
14831483
from line 1953
19531953
19541954 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
19551955
1956 - `"claude-haiku-5-5"`
1957
1958 Fastest model for high-volume, real-time tasks
1959
19561960 - `"claude-sonnet-5-5"`
19571961
19581962 Efficient model for coding and agents
from line 2326
23222326 - `BetaManagedAgentsAutoPolicy object`
23232327
23242328 The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask.
2329
2330 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
2331
2332 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
2333
2334 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2335
2336 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
2337
2338 - `BetaManagedAgentsWebFetchURLSourceAll object`
2339
2340 Every URL from this source may be fetched. This is the default.
2341
2342 - `type: "all"`
2343
2344 - `BetaManagedAgentsWebFetchURLSourceNone object`
2345
2346 This source contributes no URLs that may be fetched.
2347
2348 - `type: "none"`
2349
2350 - `BetaManagedAgentsWebFetchURLSourceOnly object`
2351
2352 Only the named tools' results contribute URLs that may be fetched.
2353
2354 - `type: "only"`
2355
2356 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2357
2358 The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results.
2359
2360 - `type: "tool_reference"`
2361
2362 Must be "tool_reference".
2363
2364 - `name: string`
2365
2366 Name of the tool. Compared exactly, so upper and lower case letters are different.
2367
2368 minLength: 1, maxLength: 128
2369
2370 - `BetaManagedAgentsWebFetchURLSourceExcept object`
2371
2372 Every tool's results contribute URLs that may be fetched, except the named tools' results.
2373
2374 - `type: "except"`
2375
2376 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2377
2378 The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results.
2379
2380 - `type: "tool_reference"`
2381
2382 Must be "tool_reference".
2383
2384 - `name: string`
2385
2386 Name of the tool. Compared exactly, so upper and lower case letters are different.
2387
2388 minLength: 1, maxLength: 128
2389
2390 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2391
2392 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
2393
2394 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
2395
2396 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
2397
2398 - `BetaManagedAgentsWebFetchURLSourceAll object`
2399
2400 Every URL from this source may be fetched. This is the default.
2401
2402 - `BetaManagedAgentsWebFetchURLSourceNone object`
2403
2404 This source contributes no URLs that may be fetched.
23252405
23262406 - `allowed_domains: optional array of string`
23272407
from line 2762
26822762{
26832763 "data": [
26842764 {
2685 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
2765 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
26862766 "content": [
26872767 {
26882768 "text": "Where is my order #1234?",
from line 2773
26932773 "processed_at": "2026-03-15T10:00:00Z"
26942774 },
26952775 {
2696 "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz",
2776 "id": "sevt_011CZkZHPq1jCdq5mbRTjiVn",
26972777 "content": [
26982778 {
26992779 "text": "Let me look up order #1234 for you.",
from line 3751
36713751{
36723752 "data": [
36733753 {
3674 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
3754 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
36753755 "content": [
36763756 {
36773757 "text": "Where is my order #1234?",
from line 5133
50535133
50545134 - `BetaManagedAgentsSessionThreadCreatedEvent object`
50555135
5056 Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation.
5136 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
50575137
50585138 - `type: "session.thread_created"`
50595139
from line 5609
55295609
55305610 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
55315611
5612 - `"claude-haiku-5-5"`
5613
5614 Fastest model for high-volume, real-time tasks
5615
55325616 - `"claude-sonnet-5-5"`
55335617
55345618 Efficient model for coding and agents
from line 5982
58985982 - `BetaManagedAgentsAutoPolicy object`
58995983
59005984 The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask.
5985
5986 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
5987
5988 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
5989
5990 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
5991
5992 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
5993
5994 - `BetaManagedAgentsWebFetchURLSourceAll object`
5995
5996 Every URL from this source may be fetched. This is the default.
5997
5998 - `type: "all"`
5999
6000 - `BetaManagedAgentsWebFetchURLSourceNone object`
6001
6002 This source contributes no URLs that may be fetched.
6003
6004 - `type: "none"`
6005
6006 - `BetaManagedAgentsWebFetchURLSourceOnly object`
6007
6008 Only the named tools' results contribute URLs that may be fetched.
6009
6010 - `type: "only"`
6011
6012 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
6013
6014 The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results.
6015
6016 - `type: "tool_reference"`
6017
6018 Must be "tool_reference".
6019
6020 - `name: string`
6021
6022 Name of the tool. Compared exactly, so upper and lower case letters are different.
6023
6024 minLength: 1, maxLength: 128
6025
6026 - `BetaManagedAgentsWebFetchURLSourceExcept object`
6027
6028 Every tool's results contribute URLs that may be fetched, except the named tools' results.
6029
6030 - `type: "except"`
6031
6032 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
6033
6034 The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results.
6035
6036 - `type: "tool_reference"`
6037
6038 Must be "tool_reference".
6039
6040 - `name: string`
6041
6042 Name of the tool. Compared exactly, so upper and lower case letters are different.
6043
6044 minLength: 1, maxLength: 128
6045
6046 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
6047
6048 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
6049
6050 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
6051
6052 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
6053
6054 - `BetaManagedAgentsWebFetchURLSourceAll object`
6055
6056 Every URL from this source may be fetched. This is the default.
6057
6058 - `BetaManagedAgentsWebFetchURLSourceNone object`
6059
6060 This source contributes no URLs that may be fetched.
59016061
59026062 - `allowed_domains: optional array of string`
59036063
from line 6462
63026462
63036463```json
63046464{
6305 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
6465 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
63066466 "content": [
63076467 {
63086468 "text": "Where is my order #1234?",
from line 11004
1084411004
1084511005 - `BetaManagedAgentsSessionThreadCreatedEvent object`
1084611006
10847 Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation.
11007 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
1084811008
1084911009 - `type: "session.thread_created"`
1085011010
from line 11480
1132011480
1132111481 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
1132211482
11483 - `"claude-haiku-5-5"`
11484
11485 Fastest model for high-volume, real-time tasks
11486
1132311487 - `"claude-sonnet-5-5"`
1132411488
1132511489 Efficient model for coding and agents
from line 11854
1169011854
1169111855 The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask.
1169211856
11857 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
11858
11859 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
11860
11861 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
11862
11863 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
11864
11865 - `BetaManagedAgentsWebFetchURLSourceAll object`
11866
11867 Every URL from this source may be fetched. This is the default.
11868
11869 - `type: "all"`
11870
11871 - `BetaManagedAgentsWebFetchURLSourceNone object`
11872
11873 This source contributes no URLs that may be fetched.
11874
11875 - `type: "none"`
11876
11877 - `BetaManagedAgentsWebFetchURLSourceOnly object`
11878
11879 Only the named tools' results contribute URLs that may be fetched.
11880
11881 - `type: "only"`
11882
11883 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
11884
11885 The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results.
11886
11887 - `type: "tool_reference"`
11888
11889 Must be "tool_reference".
11890
11891 - `name: string`
11892
11893 Name of the tool. Compared exactly, so upper and lower case letters are different.
11894
11895 minLength: 1, maxLength: 128
11896
11897 - `BetaManagedAgentsWebFetchURLSourceExcept object`
11898
11899 Every tool's results contribute URLs that may be fetched, except the named tools' results.
11900
11901 - `type: "except"`
11902
11903 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
11904
11905 The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results.
11906
11907 - `type: "tool_reference"`
11908
11909 Must be "tool_reference".
11910
11911 - `name: string`
11912
11913 Name of the tool. Compared exactly, so upper and lower case letters are different.
11914
11915 minLength: 1, maxLength: 128
11916
11917 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
11918
11919 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
11920
11921 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
11922
11923 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
11924
11925 - `BetaManagedAgentsWebFetchURLSourceAll object`
11926
11927 Every URL from this source may be fetched. This is the default.
11928
11929 - `BetaManagedAgentsWebFetchURLSourceNone object`
11930
11931 This source contributes no URLs that may be fetched.
11932
1169311933 - `allowed_domains: optional array of string`
1169411934
1169511935 - `blocked_domains: optional array of string`
from line 12534
1229412534
1229512535- `BetaManagedAgentsSessionThreadCreatedEvent object`
1229612536
12297 Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation.
12537 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
1229812538
1229912539 - `type: "session.thread_created"`
1230012540
from line 14278
1403814278
1403914279 - `BetaManagedAgentsSessionThreadCreatedEvent object`
1404014280
14041 Emitted when a subagent is spawned as a new thread. Written to the parent thread's output stream so clients observing the session see child creation.
14281 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
1404214282
1404314283 - `type: "session.thread_created"`
1404414284
from line 14754
1451414754
1451514755 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
1451614756
14757 - `"claude-haiku-5-5"`
14758
14759 Fastest model for high-volume, real-time tasks
14760
1451714761 - `"claude-sonnet-5-5"`
1451814762
1451914763 Efficient model for coding and agents
from line 15128
1488415128
1488515129 The server decides each tool call individually: it judges, from the tool, its input, and the session content so far, whether the call is safe to execute or high-risk, and evaluates it to allow when judged safe and to deny when judged high-risk. A call the server cannot reach a judgement on evaluates to ask.
1488615130
15131 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
15132
15133 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
15134
15135 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
15136
15137 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
15138
15139 - `BetaManagedAgentsWebFetchURLSourceAll object`
15140
15141 Every URL from this source may be fetched. This is the default.
15142
15143 - `type: "all"`
15144
15145 - `BetaManagedAgentsWebFetchURLSourceNone object`
15146
15147 This source contributes no URLs that may be fetched.
15148
15149 - `type: "none"`
15150
15151 - `BetaManagedAgentsWebFetchURLSourceOnly object`
15152
15153 Only the named tools' results contribute URLs that may be fetched.
15154
15155 - `type: "only"`
15156
15157 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
15158
15159 The tools whose results contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "none" to allow no tool's results.
15160
15161 - `type: "tool_reference"`
15162
15163 Must be "tool_reference".
15164
15165 - `name: string`
15166
15167 Name of the tool. Compared exactly, so upper and lower case letters are different.
15168
15169 minLength: 1, maxLength: 128
15170
15171 - `BetaManagedAgentsWebFetchURLSourceExcept object`
15172
15173 Every tool's results contribute URLs that may be fetched, except the named tools' results.
15174
15175 - `type: "except"`
15176
15177 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
15178
15179 The tools whose results do not contribute. Between 1 and 128 entries, each with a different name. An empty list is rejected; use "all" to leave out no tool's results.
15180
15181 - `type: "tool_reference"`
15182
15183 Must be "tool_reference".
15184
15185 - `name: string`
15186
15187 Name of the tool. Compared exactly, so upper and lower case letters are different.
15188
15189 minLength: 1, maxLength: 128
15190
15191 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
15192
15193 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
15194
15195 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
15196
15197 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
15198
15199 - `BetaManagedAgentsWebFetchURLSourceAll object`
15200
15201 Every URL from this source may be fetched. This is the default.
15202
15203 - `BetaManagedAgentsWebFetchURLSourceNone object`
15204
15205 This source contributes no URLs that may be fetched.
15206
1488715207 - `allowed_domains: optional array of string`
1488815208
1488915209 - `blocked_domains: optional array of string`
1489015210
No line in this hunk matches that.