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Sweep 06 Nov 2026 · 01:32Z Build v2.1.319 537 read Stable v2.1.311 Latest v2.1.319 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.

Events22,667dated, and never edited afterwards
Newestthe last time anything moved
Flag readings moved17,294a reading is one sample, for one account
Documentation arrived5,263a docs edit touched an entry's names
WhenEntryWhat happened
v2.1.299CLAUDE_CODE_MAX_CONTEXT_TOKENS Documentation arrivedAnthropic's documentation has since written up CLAUDE_CODE_MAX_CONTEXT_TOKENS, on Model configuration.
the line in the docs

* **Any other window**: set [`CLAUDE_CODE_MAX_CONTEXT_TOKENS`](/docs/en/env-vars) to the window size in tokens in the environment that starts Claude Code, such as `CLAUDE_CODE_MAX_CONTEXT_TOKENS=400000`. For an unrecognized ID that doesn't…
v2.1.299/feedback Documentation arrivedAnthropic's documentation has since written up /feedback, on Error reference.
the line in the docs

API Error: Opus 4.8's safeguards flagged this message. Our intentionally broad safeguards allow us to deliver more capabilities faster, but can sometimes flag legitimate cybersecurity work. Send feedback with /feedback or learn more: https…
v2.1.299CLAUDE_CODE_MAX_OUTPUT_TOKENS Documentation arrivedAnthropic's documentation has since written up CLAUDE_CODE_MAX_OUTPUT_TOKENS, on Error reference.
the line in the docs

API Error: Claude's response exceeded the ... output token maximum. To configure this behavior, set the CLAUDE_CODE_MAX_OUTPUT_TOKENS environment variable.
v2.1.300PermissionRequest Documentation arrivedAnthropic's documentation has since written up PermissionRequest, on Error reference.
the line in the docs

| `Managed settings contain invalid entries, including PreToolUse/PermissionRequest hooks that are NOT loaded; fix or remove each entry:` | [Configuration warnings](#managed-settings-hooks-not-loaded) |
v2.1.300PermissionRequest Documentation arrivedAnthropic's documentation has since written up PermissionRequest, on Error reference.
the line in the docs

| `Managed settings contain invalid entries, including PreToolUse/PermissionRequest hooks that are NOT loaded; fix or remove each entry:` | [Configuration warnings](#managed-settings-hooks-not-loaded) |
v2.1.299PermissionRequest Documentation arrivedAnthropic's documentation has since written up PermissionRequest, on Error reference.
the line in the docs

| `Managed settings contain invalid entries, including PreToolUse/PermissionRequest hooks that are NOT loaded; fix or remove each entry:` | [Configuration warnings](#managed-settings-hooks-not-loaded) |
v2.1.299PermissionRequest Documentation arrivedAnthropic's documentation has since written up PermissionRequest, on Error reference.
the line in the docs

| `Managed settings contain invalid entries, including PreToolUse/PermissionRequest hooks that are NOT loaded; fix or remove each entry:` | [Configuration warnings](#managed-settings-hooks-not-loaded) |
v2.1.295/rewind Documentation arrivedAnthropic's documentation has since written up /rewind, on Claude Code changelog.
the line in the docs

- Fixed skills no longer being listed to the model after using `/rewind`
v2.1.289claude auth status Documentation arrivedAnthropic's documentation has since written up claude auth status, on Claude Code changelog.
the line in the docs

- Fixed sign-in refresh timeouts and unexpected sign-outs after a short command such as `claude auth status` or `claude plugin list` exited in the middle of a token refresh
v2.1.300awsAuthRefresh Documentation arrivedAnthropic's documentation has since written up awsAuthRefresh, on Claude Code changelog.
the line in the docs

- Fixed switching to a model whose name contains `application-inference-profile` running your `awsAuthRefresh` command and delaying model-switch hooks when the provider is not Bedrock
v2.1.300PreToolUse Documentation arrivedAnthropic's documentation has since written up PreToolUse, on Claude Code changelog.
the line in the docs

- Fixed artifact updates being refused where a PreToolUse hook covers Edit or Write; Claude now edits the file and then republishes instead of changing it in the publish call
v2.1.300PreToolUse Documentation arrivedAnthropic's documentation has since written up PreToolUse, on Claude Code changelog.
the line in the docs

- Fixed artifact updates being refused where a PreToolUse hook covers Edit or Write; Claude now edits the file and then republishes instead of changing it in the publish call
v2.1.300WorktreeCreate Documentation arrivedAnthropic's documentation has since written up WorktreeCreate, on Claude Code changelog.
the line in the docs

- Fixed quitting removing a worktree made by a `WorktreeCreate` hook without asking when it may hold unpushed commits
v2.1.300WorktreeCreate Documentation arrivedAnthropic's documentation has since written up WorktreeCreate, on Claude Code changelog.
the line in the docs

- Fixed quitting removing a worktree made by a `WorktreeCreate` hook without asking when it may hold unpushed commits
v2.1.299--name Documentation arrivedAnthropic's documentation has since written up --name, on user-management.
the line in the docs

ant beta:organization:rbac-groups create --name Engineering
v2.1.299headers Documentation arrivedA small documentation edit on api touched a line naming headers after this was published.
the line in the docs

A create request takes the Console's settings except **Provider**, so enter your observability platform's endpoint URL and headers yourself. Set `traces.max_content_bytes` (csharp, go: `Traces.MaxContentBytes`; java, php: `traces.maxConten…
v2.1.299edits Documentation arrivedAnthropic's documentation has since written up edits, on mid-conversation-effort-example.
the line in the docs

"description": "Orchestrate a multiagent workflow: split a large task into independent subtasks and run them as parallel agents, then collect their results. Opt-in: only use this tool when the user explicitly asks for a workflow, or when a…
v2.1.299edits Documentation arrivedAnthropic's documentation has since written up edits, on mid-conversation-effort-example.
the line in the docs

"description": "Orchestrate a multiagent workflow: split a large task into independent subtasks and run them as parallel agents, then collect their results. Opt-in: only use this tool when the user explicitly asks for a workflow, or when a…
v2.1.299/fast Documentation arrivedAnthropic's documentation has since written up /fast, on fast-mode.
the line in the docs

Fast mode for Claude Opus 5.5 doesn't need the `fast-mode-2026-02-01` beta header or an access request. Requests that still send the header keep working. Fast mode for Claude Opus 5 and Claude Opus 4.8 is in research preview: contact your …
v2.1.299headers Documentation arrivedAnthropic's documentation has since written up headers, on claude-platform-on-aws.
the line in the docs

# Request-Id headers, to stderr
v2.1.299ANTHROPIC_AUTH_TOKEN Documentation arrivedAnthropic's documentation has since written up ANTHROPIC_AUTH_TOKEN, on claude-in-microsoft-foundry.
the line in the docs

env -u ANTHROPIC_API_KEY ANTHROPIC_AUTH_TOKEN="$ACCESS_TOKEN" ant messages create \
v2.1.299/fast Documentation arrivedA small documentation edit on choosing-a-model touched a line naming /fast after this was published.
the line in the docs

* **Speed:** How quickly does the model need to respond in your application? [Fast mode](https://platform.claude.com/docs/en/build-with-claude/fast-mode) delivers up to 2.5x higher output speed at premium pricing on [supported models](http…
v2.1.274/review Documentation arrivedA small documentation edit on Week 32 · August 3–7, 2026 touched a line naming /review after this was published.
the line in the docs

<div><code>/review</code> is now an alias of <a href="/docs/en/code-review-local"><code>/code-review</code></a>, and <code>/code-review</code> with no effort level reuses the level you typed last</div>
v2.1.296/login Documentation arrivedA small documentation edit on Find bugs with ultrareview touched a line naming /login after this was published.
the line in the docs

Ultrareview requires authentication with a claude.ai account because it runs as a cloud session on Anthropic's infrastructure. If you are signed in with an API key only, run `/login` and authenticate with claude.ai first. Ultrareview is no…
v2.1.295/rewind Documentation arrivedA small documentation edit on Extend Claude with skills touched a line naming /rewind after this was published.
the line in the docs

A forked skill that runs in the background applies its edits outside your session's [checkpoints](/docs/en/checkpointing#subagent-edits-not-restored). After one, `/rewind` restores only the files Claude had already edited in your conversat…
v2.1.286/rewind Documentation arrivedA small documentation edit on Extend Claude with skills touched a line naming /rewind after this was published.
the line in the docs

A forked skill that runs in the background applies its edits outside your session's [checkpoints](/docs/en/checkpointing#subagent-edits-not-restored). After one, `/rewind` restores only the files Claude had already edited in your conversat…
v2.1.283/rewind Documentation arrivedA small documentation edit on Extend Claude with skills touched a line naming /rewind after this was published.
the line in the docs

A forked skill that runs in the background applies its edits outside your session's [checkpoints](/docs/en/checkpointing#subagent-edits-not-restored). After one, `/rewind` restores only the files Claude had already edited in your conversat…
v2.1.299/code Documentation arrivedA small documentation edit on Track team usage with analytics touched a line naming /code after this was published.
the line in the docs

Code Review has its own dashboard. For review activity and spend, see [View usage](/docs/en/code-review-costs#view-usage).
v2.1.290/code-review Documentation arrivedA small documentation edit on Track team usage with analytics touched a line naming /code-review after this was published.
the line in the docs

Code Review has its own dashboard. For review activity and spend, see [View usage](/docs/en/code-review-costs#view-usage).
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.
v2.1.300tengu_sunny_locket Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account.
v2.1.290tengu_sunny_locket Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account.
v2.1.283tengu_sunny_locket Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account.
v2.1.283tengu_sunny_locket Flag reading movedThe flag server now returns {"mode":"off"} for tengu_sunny_locket, read as this account.
v2.1.282tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.281tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.281tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.269tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.261tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.261tengu_smooth_chipmunk Flag reading movedThe flag server now returns off for tengu_smooth_chipmunk, read as this account.
v2.1.273tengu_quiet_dolphin Flag reading movedThe flag server now returns off for tengu_quiet_dolphin, 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.
v2.1.284tengu_lantern_wick_text Flag reading movedThe flag server now returns null for tengu_lantern_wick_text, 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.
v2.1.265tengu_curious_tower_stateless_models Flag reading movedThe flag server now returns "fable-5-1, opus-5, opus-4-8" for tengu_curious_tower_stateless_models, read as this account.
v2.1.301tengu_cheeky_toucan Flag reading movedThe flag server now returns nothing at all, having stopped carrying it for tengu_cheeky_toucan, read as this account.
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