List Session Thread Events changedapi/beta/sessions/threads/events/list
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+83added
Lines−3removed
From line
1,371
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 1371, old and new numbered
/
from line 1371
13711371
13721372 - `BetaManagedAgentsSessionThreadCreatedEvent object`
13731373
1374 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.
1374 Emitted when a child thread is created. Written to the parent thread's output stream so clients observing the session see child creation.
13751375
13761376 - `type: "session.thread_created"`
13771377
from line 1847
18471847
18481848 See [models](https://docs.anthropic.com/en/docs/models-overview) for additional details and options.
18491849
1850 - `"claude-haiku-5-5"`
1851
1852 Fastest model for high-volume, real-time tasks
1853
18501854 - `"claude-sonnet-5-5"`
18511855
18521856 Efficient model for coding and agents
from line 2221
22172221
22182222 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.
22192223
2224 - `url_sources: BetaManagedAgentsWebFetchURLSources or null`
2225
2226 Which sources contribute URLs the tool may fetch, always in the object form. Null when not set, which allows every source.
2227
2228 - `client_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2229
2230 Which custom tools' results contribute URLs that may be fetched. Null when not set, which allows every custom tool's results.
2231
2232 - `BetaManagedAgentsWebFetchURLSourceAll object`
2233
2234 Every URL from this source may be fetched. This is the default.
2235
2236 - `type: "all"`
2237
2238 - `BetaManagedAgentsWebFetchURLSourceNone object`
2239
2240 This source contributes no URLs that may be fetched.
2241
2242 - `type: "none"`
2243
2244 - `BetaManagedAgentsWebFetchURLSourceOnly object`
2245
2246 Only the named tools' results contribute URLs that may be fetched.
2247
2248 - `type: "only"`
2249
2250 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2251
2252 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.
2253
2254 - `type: "tool_reference"`
2255
2256 Must be "tool_reference".
2257
2258 - `name: string`
2259
2260 Name of the tool. Compared exactly, so upper and lower case letters are different.
2261
2262 minLength: 1, maxLength: 128
2263
2264 - `BetaManagedAgentsWebFetchURLSourceExcept object`
2265
2266 Every tool's results contribute URLs that may be fetched, except the named tools' results.
2267
2268 - `type: "except"`
2269
2270 - `tools: array of BetaManagedAgentsWebFetchURLSourceToolReference`
2271
2272 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.
2273
2274 - `type: "tool_reference"`
2275
2276 Must be "tool_reference".
2277
2278 - `name: string`
2279
2280 Name of the tool. Compared exactly, so upper and lower case letters are different.
2281
2282 minLength: 1, maxLength: 128
2283
2284 - `server_tool_results: BetaManagedAgentsWebFetchURLSourceToolFilter or null`
2285
2286 Which of the web_search and web_fetch tools' results contribute URLs that may be fetched. Null when not set, which allows both.
2287
2288 - `user_input: BetaManagedAgentsWebFetchURLSourceUserInput or null`
2289
2290 Whether URLs in the text of user messages may be fetched. Null when not set, which allows them.
2291
2292 - `BetaManagedAgentsWebFetchURLSourceAll object`
2293
2294 Every URL from this source may be fetched. This is the default.
2295
2296 - `BetaManagedAgentsWebFetchURLSourceNone object`
2297
2298 This source contributes no URLs that may be fetched.
2299
22202300 - `allowed_domains: optional array of string`
22212301
22222302 - `blocked_domains: optional array of string`
from line 2656
25762656{
25772657 "data": [
25782658 {
2579 "id": "sevt_011CZkZGOp0iBcp4kaQSihUmy",
2659 "id": "sevt_011CZkZGPp1iBcp4kaQSihUm",
25802660 "content": [
25812661 {
25822662 "text": "Where is my order #1234?",
from line 2667
25872667 "processed_at": "2026-03-15T10:00:00Z"
25882668 },
25892669 {
2590 "id": "sevt_011CZkZHPq1jCdq5lbRTjiVnz",
2670 "id": "sevt_011CZkZHPq1jCdq5mbRTjiVn",
25912671 "content": [
25922672 {
25932673 "text": "Let me look up order #1234 for you.",
No line in this hunk matches that.