Events changedapi/beta/sessions/threads/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+165added
Lines−5removed
From line
1,373
where the diff opens
First seen
14 Aug 2026
this site's first read of the page
Recorded edits22to this page, all time
The whole hunk
from line 1373, old and new numbered
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from line 1373
13731373
13741374 - `BetaManagedAgentsSessionThreadCreatedEvent object`
13751375
1376 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.
1376 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
13771377
13781378 - `type: "session.thread_created"`
13791379
from line 1849
18491849
18501850 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
18511851
1852 - `"claude-haiku-5-5"`
1853
1854 Fastest model for high-volume, real-time tasks
1855
18521856 - `"claude-sonnet-5-5"`
18531857
18541858 Efficient model for coding and agents
from line 2223
22192223
22202224 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.
22212225
2226 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
2227
2228 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
2229
2230 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2231
2232 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
2233
2234 - `BetaManagedAgentsWebFetchURLSourceAll object`
2235
2236 Every URL from this source may be fetched. This is the default.
2237
2238 - `type: "all"`
2239
2240 - `BetaManagedAgentsWebFetchURLSourceNone object`
2241
2242 This source contributes no URLs that may be fetched.
2243
2244 - `type: "none"`
2245
2246 - `BetaManagedAgentsWebFetchURLSourceOnly object`
2247
2248 Only the named tools' results contribute URLs that may be fetched.
2249
2250 - `type: "only"`
2251
2252 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2253
2254 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.
2255
2256 - `type: "tool_reference"`
2257
2258 Must be "tool_reference".
2259
2260 - `name: string`
2261
2262 Name of the tool. Compared exactly, so upper and lower case letters are different.
2263
2264 minLength: 1, maxLength: 128
2265
2266 - `BetaManagedAgentsWebFetchURLSourceExcept object`
2267
2268 Every tool's results contribute URLs that may be fetched, except the named tools' results.
2269
2270 - `type: "except"`
2271
2272 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2273
2274 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.
2275
2276 - `type: "tool_reference"`
2277
2278 Must be "tool_reference".
2279
2280 - `name: string`
2281
2282 Name of the tool. Compared exactly, so upper and lower case letters are different.
2283
2284 minLength: 1, maxLength: 128
2285
2286 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2287
2288 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
2289
2290 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
2291
2292 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
2293
2294 - `BetaManagedAgentsWebFetchURLSourceAll object`
2295
2296 Every URL from this source may be fetched. This is the default.
2297
2298 - `BetaManagedAgentsWebFetchURLSourceNone object`
2299
2300 This source contributes no URLs that may be fetched.
2301
22222302 - `allowed_domains: optional array of string`
22232303
22242304 - `blocked_domains: optional array of string`
from line 2658
25782658{
25792659 "data": [
25802660 {
2581 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
2661 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
25822662 "content": [
25832663 {
25842664 "text": "Where is my order #1234?",
from line 2669
25892669 "processed_at": "2026-03-15T10:00:00Z"
25902670 },
25912671 {
2592 "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz",
2672 "id": "sevt_011CZkZHPq1jCdq5mbRTjiVn",
25932673 "content": [
25942674 {
25952675 "text": "Let me look up order #1234 for you.",
from line 4054
39744054
39754055 - `BetaManagedAgentsSessionThreadCreatedEvent object`
39764056
3977 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.
4057 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
39784058
39794059 - `type: "session.thread_created"`
39804060
from line 4530
44504530
44514531 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
44524532
4533 - `"claude-haiku-5-5"`
4534
4535 Fastest model for high-volume, real-time tasks
4536
44534537 - `"claude-sonnet-5-5"`
44544538
44554539 Efficient model for coding and agents
from line 4904
48204904
48214905 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.
48224906
4907 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
4908
4909 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
4910
4911 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
4912
4913 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
4914
4915 - `BetaManagedAgentsWebFetchURLSourceAll object`
4916
4917 Every URL from this source may be fetched. This is the default.
4918
4919 - `type: "all"`
4920
4921 - `BetaManagedAgentsWebFetchURLSourceNone object`
4922
4923 This source contributes no URLs that may be fetched.
4924
4925 - `type: "none"`
4926
4927 - `BetaManagedAgentsWebFetchURLSourceOnly object`
4928
4929 Only the named tools' results contribute URLs that may be fetched.
4930
4931 - `type: "only"`
4932
4933 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
4934
4935 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.
4936
4937 - `type: "tool_reference"`
4938
4939 Must be "tool_reference".
4940
4941 - `name: string`
4942
4943 Name of the tool. Compared exactly, so upper and lower case letters are different.
4944
4945 minLength: 1, maxLength: 128
4946
4947 - `BetaManagedAgentsWebFetchURLSourceExcept object`
4948
4949 Every tool's results contribute URLs that may be fetched, except the named tools' results.
4950
4951 - `type: "except"`
4952
4953 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
4954
4955 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.
4956
4957 - `type: "tool_reference"`
4958
4959 Must be "tool_reference".
4960
4961 - `name: string`
4962
4963 Name of the tool. Compared exactly, so upper and lower case letters are different.
4964
4965 minLength: 1, maxLength: 128
4966
4967 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
4968
4969 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
4970
4971 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
4972
4973 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
4974
4975 - `BetaManagedAgentsWebFetchURLSourceAll object`
4976
4977 Every URL from this source may be fetched. This is the default.
4978
4979 - `BetaManagedAgentsWebFetchURLSourceNone object`
4980
4981 This source contributes no URLs that may be fetched.
4982
48234983 - `allowed_domains: optional array of string`
48244984
48254985 - `blocked_domains: optional array of string`
from line 5383
52235383
52245384```json
52255385{
5226 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
5386 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
52275387 "content": [
52285388 {
52295389 "text": "Where is my order #1234?",
No line in this hunk matches that.