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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.318 Next v2.1.319 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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What has changed since

An entry is only as true as the day it was written.

Flags move on the server after a release ships. Anthropic's own notes land days later and their documentation later still. Sometimes an entry turns out to be wrong and gets corrected by hand. All of that is recorded against the entry it happened to, and this is the whole of it in the order it happened.

Nothing here replaces an entry. Every line links to the page its release published, still saying what that release said, because a correction is added and dated rather than swapped in.

Events22,542dated, and never edited afterwards
Newestthe last time anything moved
Flag readings moved17,190a reading is one sample, for one account
Documentation arrived5,242a docs edit touched an entry's names
WhenEntryWhat happened
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"autoContinue":true,"enabled":true,"label":"Reset your session limit now","noticeLine":"/limit-reset to reset your session limit now · uses weekly limit · 1/week","spentLine":"Weekly reset used · available again {date}","successLine":"Session limit reset · next reset available {date} · your weekly limit still applies","unavailableLine":"Couldn't reset your session limit right now · try again in a moment","version":1} for tengu_nifty_lemur, read as this account.
v2.1.223tengu_juniper_relay Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account.
v2.1.251tengu_juniper_relay Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account.
v2.1.206tengu_umber_kestrel Flag reading movedThe flag server now returns off for tengu_umber_kestrel, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account.
v2.1.223tengu_juniper_relay Flag reading movedThe flag server now returns off for tengu_juniper_relay, read as this account.
v2.1.251tengu_juniper_relay Flag reading movedThe flag server now returns off for tengu_juniper_relay, read as this account.
v2.1.268file_upload Documentation arrivedAnthropic's documentation has since written up file_upload, on compliance-errors.
the line in the docs

**Fix:** Reconcile against recent `claude_file_uploaded` or `claude_file_deleted` activities. Files deleted along with a chat have no `claude_file_deleted` activity, so check for the chat's `claude_chat_deleted` activity as well. If the fi…
v2.1.268file_upload Documentation arrivedAnthropic's documentation has since written up file_upload, on compliance-errors.
the line in the docs

**Fix:** Reconcile against recent `claude_file_uploaded` or `claude_file_deleted` activities. Files deleted along with a chat have no `claude_file_deleted` activity, so check for the chat's `claude_chat_deleted` activity as well. If the fi…
v2.1.268--remote Documentation arrivedAnthropic's documentation has since written up --remote, on WARNING: This operation PERMANENTLY deletes the chat, all of its messages,.
the line in the docs

In curl, the `--remote-header-name` (`-J`) option, which normally saves a download under the `Content-Disposition` file name, does not read the `filename*` form, so name the saved file yourself with `--output`. In a script, take the name f…
v2.1.269claude-opus-4-5 Documentation arrivedAnthropic's documentation has since written up claude-opus-4-5, on Messages.
the line in the docs

- `"claude-opus-4-5"`
v2.1.269claude-haiku-4-5 Documentation arrivedAnthropic's documentation has since written up claude-haiku-4-5, on Messages.
the line in the docs

- `"claude-haiku-4-5"`
v2.1.268claude-sonnet-4-6 Documentation arrivedAnthropic's documentation has since written up claude-sonnet-4-6, on Messages.
the line in the docs

- `"claude-sonnet-4-6"`
v2.1.268claude-opus-4-6 Documentation arrivedAnthropic's documentation has since written up claude-opus-4-6, on Messages.
the line in the docs

- `"claude-opus-4-6"`
v2.1.268claude-opus-4-7 Documentation arrivedAnthropic's documentation has since written up claude-opus-4-7, on Messages.
the line in the docs

- `"claude-opus-4-7"`
v2.1.257mythos-5-1 Documentation arrivedAnthropic's documentation has since written up mythos-5-1, on Messages.
the line in the docs

- `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
v2.1.257claude-mythos-5-1 Documentation arrivedAnthropic's documentation has since written up claude-mythos-5-1, on Messages.
the line in the docs

- `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
v2.1.257claude-mythos-5-1 Documentation arrivedAnthropic's documentation has since written up claude-mythos-5-1, on Messages.
the line in the docs

- `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
v2.1.246mythos-5 Documentation arrivedAnthropic's documentation has since written up mythos-5, on Messages.
the line in the docs

- `"claude-fable-5-1" or "claude-mythos-5-1" or "claude-sonnet-5" or 14 more`
v2.1.268tool_use_id Documentation arrivedAnthropic's documentation has since written up tool_use_id, on Beta.
the line in the docs

When set, this event was cross-posted from a subagent's thread to surface its custom tool use on the primary thread's stream. Empty on the thread's own events. Informational only: the server routes the matching `user.custom_tool_result` by…
v2.1.265presence Documentation arrivedAnthropic's documentation has since written up presence, on Beta.
the line in the docs

the presence of this entry in `usage.iterations`.
v2.1.269managedMcpServers Documentation arrivedAnthropic's documentation has since written up managedMcpServers, on Control MCP server access for your organization.
the line in the docs

* Servers you [provide through `managedMcpServers`](#provide-servers-through-managed-settings)
v2.1.268SessionStart Documentation arrivedA small documentation edit on Hooks reference touched a line naming SessionStart after this was published.
the line in the docs

The same wait applies at launch, including a resumed session: a prompt you send while SessionStart hooks are still running doesn't reach Claude until they finish.
v2.1.268SessionStart Documentation arrivedA small documentation edit on Hooks reference touched a line naming SessionStart after this was published.
the line in the docs

The same wait applies at launch, including a resumed session: a prompt you send while SessionStart hooks are still running doesn't reach Claude until they finish.
v2.1.265SessionStart Documentation arrivedA small documentation edit on Hooks reference touched a line naming SessionStart after this was published.
the line in the docs

The same wait applies at launch, including a resumed session: a prompt you send while SessionStart hooks are still running doesn't reach Claude until they finish.
v2.1.251SessionStart Documentation arrivedA small documentation edit on Hooks reference touched a line naming SessionStart after this was published.
the line in the docs

The same wait applies at launch, including a resumed session: a prompt you send while SessionStart hooks are still running doesn't reach Claude until they finish.
v2.1.251SessionStart Documentation arrivedA small documentation edit on Hooks reference touched a line naming SessionStart after this was published.
the line in the docs

The same wait applies at launch, including a resumed session: a prompt you send while SessionStart hooks are still running doesn't reach Claude until they finish.
v2.1.268streaming Documentation arrivedA small documentation edit on Error reference touched a line naming streaming after this was published.
the line in the docs

Before v2.1.271, a reply that carried a valid API message under a non-JSON content type such as `text/plain` also ended the turn with this error. Some LLM gateways use that content type for the non-streaming reply.
v2.1.267ANTHROPIC_UNIX_SOCKET Documentation arrivedA small documentation edit on Error reference touched a line naming ANTHROPIC_UNIX_SOCKET after this was published.
the line in the docs

* `ANTHROPIC_UNIX_SOCKET` set, so the session sends its requests through a local socket rather than to `api.anthropic.com`
v2.1.267ANTHROPIC_UNIX_SOCKET Documentation arrivedA small documentation edit on Error reference touched a line naming ANTHROPIC_UNIX_SOCKET after this was published.
the line in the docs

* `ANTHROPIC_UNIX_SOCKET` set, so the session sends its requests through a local socket rather than to `api.anthropic.com`
v2.1.257policy-limits.json Documentation arrivedA small documentation edit on Explore the .claude directory touched a line naming policy-limits.json after this was published.
the line in the docs

| `policy-limits.json` | Cached feature policy settings for your organization. Only present for some account types. Refreshed automatically. A `policy-limits.json.stamp.json` sidecar records which account or API key the cache belongs to. C…
v2.1.206tengu_umber_kestrel Flag reading movedThe flag server now returns on for tengu_umber_kestrel, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"allowanceNote":"{percent} allowance left","budgetExhaustedCopy":"You've used this week's lower-priority allowance","cooloffMinutes":10,"enabled":true,"label":"Continue now at lower priority","noticeLine":"/low-priority to continue now at lower priority · uses your weekly limit","statusLine":"Lower priority until {reset}","version":3,"waitBanner":"Working at lower priority · waiting for capacity"} for tengu_toasty_breeze, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"allowanceNote":"{percent} allowance left","budgetExhaustedCopy":"You've used this week's lower-priority allowance","cooloffMinutes":10,"enabled":true,"label":"Continue now at lower priority","noticeLine":"/low-priority to continue now at lower priority · uses your weekly limit","statusLine":"Lower priority until {reset}","version":3,"waitBanner":"Working at lower priority · waiting for capacity"} for tengu_toasty_breeze, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"autoContinue":true,"enabled":true,"label":"Reset your session limit now","noticeLine":"/limit-reset to reset your session limit now · uses weekly limit · 1/week","spentLine":"Weekly reset used · available again {date}","successLine":"Session limit reset · next reset available {date} · your weekly limit still applies","unavailableLine":"Couldn't reset your session limit right now · try again in a moment","version":1} for tengu_nifty_lemur, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"autoContinue":true,"enabled":true,"label":"Reset your session limit now","noticeLine":"/limit-reset to reset your session limit now · uses weekly limit · 1/week","spentLine":"Weekly reset used · available again {date}","successLine":"Session limit reset · next reset available {date} · your weekly limit still applies","unavailableLine":"Couldn't reset your session limit right now · try again in a moment","version":1} for tengu_nifty_lemur, read as this account.
v2.1.223tengu_juniper_relay Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account.
v2.1.251tengu_juniper_relay Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account.
v2.1.206tengu_umber_kestrel Flag reading movedThe flag server now returns off for tengu_umber_kestrel, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_toasty_breeze, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account.
v2.1.248tengu_nifty_lemur Flag reading movedThe flag server now returns {"enabled":false,"version":0} for tengu_nifty_lemur, read as this account.
v2.1.223tengu_juniper_relay Flag reading movedThe flag server now returns off for tengu_juniper_relay, read as this account.
v2.1.251tengu_juniper_relay Flag reading movedThe flag server now returns off for tengu_juniper_relay, read as this account.
v2.1.206tengu_umber_kestrel Flag reading movedThe flag server now returns on for tengu_umber_kestrel, read as this account.
v2.1.239tengu_toasty_breeze Flag reading movedThe flag server now returns {"allowanceNote":"{percent} allowance left","budgetExhaustedCopy":"You've used this week's lower-priority allowance","cooloffMinutes":10,"enabled":true,"label":"Continue now at lower priority","noticeLine":"/low-priority to continue now at lower priority · uses your weekly limit","statusLine":"Lower priority until {reset}","version":3,"waitBanner":"Working at lower priority · waiting for capacity"} for tengu_toasty_breeze, read as this account.
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