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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
v2.1.261tengu_smooth_chipmunk Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account.
v2.1.261tengu_smooth_chipmunk Flag reading movedThe flag server now returns on for tengu_smooth_chipmunk, read as this account.
v2.1.273tengu_quiet_dolphin Flag reading movedThe flag server now returns on for tengu_quiet_dolphin, 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.
v2.1.284tengu_lantern_wick_text Flag reading movedThe flag server now returns "Usage limit reached; a short grace allowance remains, then this turn is cut off without warning. Judge what's left: if it's genuinely only a few steps, finish it properly, then stop and say so without extra polishing. Otherwise don't attempt it all: finish the piece in hand and at most two more like it, then stop. The allowance also pays for any subagents you have running: they don't get this message and will keep going, so it's up to you how to handle them. Either way, end by telling the user their usage limit was reached, what's done and what's left." for tengu_lantern_wick_text, 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.
v2.1.223tengu_juniper_relay Flag reading movedThe flag server now returns on for tengu_juniper_relay, read as this account.
v2.1.265tengu_curious_tower_stateless_models Flag reading movedThe flag server now returns "" for tengu_curious_tower_stateless_models, read as this account.
v2.1.301tengu_cheeky_toucan Flag reading movedThe flag server now returns off for tengu_cheeky_toucan, read as this account.
v2.1.300tengu_mellow_hollerith Flag reading movedThe flag server now returns nothing at all, having stopped carrying it for tengu_mellow_hollerith, read as this account.
v2.1.274tengu_mellow_hollerith Flag reading movedThe flag server now returns nothing at all, having stopped carrying it for tengu_mellow_hollerith, 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.
v2.1.300tengu_mellow_hollerith Flag reading movedThe flag server now returns off for tengu_mellow_hollerith, read as this account.
v2.1.274tengu_mellow_hollerith Flag reading movedThe flag server now returns off for tengu_mellow_hollerith, read as this account.
v2.1.301tengu_cheeky_toucan Flag reading movedThe flag server now returns off for tengu_cheeky_toucan, read as this account.
v2.1.274dimColor Documentation arrivedA small documentation edit on Draw in the interface with a mod touched a line naming dimColor after this was published.
the line in the docs

| `Text` | Styled text. Takes `color`, `bold`, `dimColor`, `italic`, `wrap`, and others such as [`weight`](/docs/en/plugins/mods/reference#text-typography). A `color` is a theme key or a color such as `'red'`. A `wrap` is `'wrap'`, `'trunc…

v2.1.301--plugin-dir Documentation arrivedAnthropic's documentation has since written up --plugin-dir, on Claude Code changelog.
the line in the docs

* Windows: Fixed every file write being refused or asked about for projects on exFAT or FAT32 drives, including in sessions started with `--plugin-dir`

v2.1.287claude plugin details Documentation arrivedAnthropic's documentation has since written up claude plugin details, on Claude Code changelog.
the line in the docs

* Fixed `claude plugin details <name>@builtin` suggesting `claude plugin list`, which never shows built-in plugins, when the plugin isn't found; it now points to `/plugin`

v2.1.300/autocompact Documentation arrivedAnthropic's documentation has since written up /autocompact, on Claude Code changelog.
the line in the docs

* Fixed `/autocompact` and `/effort` saving to the wrong model when a gateway names Opus 4 or 4.1 with a prefix, such as `anthropic/claude-opus-4-1`

v2.1.299/effort Documentation arrivedAnthropic's documentation has since written up /effort, on Claude Code changelog.
the line in the docs

* Fixed `/autocompact` and `/effort` saving to the wrong model when a gateway names Opus 4 or 4.1 with a prefix, such as `anthropic/claude-opus-4-1`

v2.1.299claude mcp serve Documentation arrivedAnthropic's documentation has since written up claude mcp serve, on Claude Code changelog.
the line in the docs

* Changed fork subagents (`subagent_type: "fork"`) to be on by default in `claude -p`, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; `CLAUDE_CODE_FORK_SUBAGENT=0` turns them off, and `claude mcp serve` ne…

v2.1.295claude mcp serve Documentation arrivedAnthropic's documentation has since written up claude mcp serve, on Claude Code changelog.
the line in the docs

* Changed fork subagents (`subagent_type: "fork"`) to be on by default in `claude -p`, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; `CLAUDE_CODE_FORK_SUBAGENT=0` turns them off, and `claude mcp serve` ne…

v2.1.295claude mcp serve Documentation arrivedAnthropic's documentation has since written up claude mcp serve, on Claude Code changelog.
the line in the docs

* Changed fork subagents (`subagent_type: "fork"`) to be on by default in `claude -p`, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; `CLAUDE_CODE_FORK_SUBAGENT=0` turns them off, and `claude mcp serve` ne…

v2.1.295claude mcp serve Documentation arrivedAnthropic's documentation has since written up claude mcp serve, on Claude Code changelog.
the line in the docs

* Changed fork subagents (`subagent_type: "fork"`) to be on by default in `claude -p`, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; `CLAUDE_CODE_FORK_SUBAGENT=0` turns them off, and `claude mcp serve` ne…

v2.1.300--permission-mode Documentation arrivedAnthropic's documentation has since written up --permission-mode, on Claude Code changelog.
the line in the docs

* Changed `claude -p` and Agent SDK sessions with no permission mode to start in `default` mode on third-party providers, with telemetry off or on a fresh install; `--permission-mode auto` keeps auto

v2.1.284/design Documentation arrivedAnthropic's documentation has since written up /design, on Claude Code changelog.
the line in the docs

* Added a notice to `/design-sync` and `/design-login` that standalone Claude Design (claude.ai/design) closes by December 14, 2026

v2.1.284/design Documentation arrivedAnthropic's documentation has since written up /design, on Claude Code changelog.
the line in the docs

* Added a notice to `/design-sync` and `/design-login` that standalone Claude Design (claude.ai/design) closes by December 14, 2026

v2.1.299--resume Documentation arrivedA small documentation edit on Manage multiple agents with agent view touched a line naming --resume after this was published.
the line in the docs

Except in the kept cases covered in [What deleting a session removes](#what-deleting-a-session-removes), deleting removes the session from the list, and a worktree Claude created for it is removed, kept, or left in place depending on how y…

v2.1.299--resume Documentation arrivedA small documentation edit on Manage multiple agents with agent view touched a line naming --resume after this was published.
the line in the docs

Except in the kept cases covered in [What deleting a session removes](#what-deleting-a-session-removes), deleting removes the session from the list, and a worktree Claude created for it is removed, kept, or left in place depending on how y…

v2.1.301/tasks Documentation arrivedAnthropic's documentation has since written up /tasks, on Orchestrate teams of Claude Code sessions.
the line in the docs

* **Task list**: `~/.claude/tasks/{team-name}/`. This directory stays on disk after the session ends. To change [how long Claude Code keeps it](/docs/en/claude-directory#cleaned-up-automatically), set [`cleanupPeriodDays`](/docs/en/setting…

v2.1.301rows Documentation arrivedA small documentation edit on Deploy Claude Desktop on 3P with the Claude API touched a line naming rows after this was published.
the line in the docs

| <span id="inferenceanthropicapikey" />Claude API key<br />`inferenceAnthropicApiKey` | `string` | MDM + Bootstrap<br />Added in 1.8089.0 | — | Leave blank to sign in with your browser, or to supply the key via a credential helper. |

v2.1.301rows Documentation arrivedA small documentation edit on Deploy Claude Desktop on 3P with the Claude API touched a line naming rows after this was published.
the line in the docs

| <span id="inferenceanthropicapikey" />Claude API key<br />`inferenceAnthropicApiKey` | `string` | MDM + Bootstrap<br />Added in 1.8089.0 | — | Leave blank to sign in with your browser, or to supply the key via a credential helper. |

v2.1.301rows Documentation arrivedA small documentation edit on Deploy Claude Desktop on 3P with the Claude API touched a line naming rows after this was published.
the line in the docs

| <span id="inferenceanthropicapikey" />Claude API key<br />`inferenceAnthropicApiKey` | `string` | MDM + Bootstrap<br />Added in 1.8089.0 | — | Leave blank to sign in with your browser, or to supply the key via a credential helper. |

v2.1.299/btw Documentation arrivedAnthropic's documentation has since written up /btw, on Changelog.
the line in the docs

* Changed `/btw` in local sessions to open a side chat in a pane beside the session, with a tab for each side chat (not yet in third-party deployments).

v2.1.301PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.301PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.300PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.300PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.299PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.299PreToolUse Documentation arrivedA small documentation edit on Hooks reference touched a line naming PreToolUse after this was published.
the line in the docs

An [Agent SDK callback hook](/docs/en/agent-sdk/hooks) on `PreToolUse` that exceeds its timeout blocks the tool call, and Claude receives an error result naming the timeout.

v2.1.300UserPromptExpansion Documentation arrivedAnthropic's documentation has since written up UserPromptExpansion, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.300UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.300UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.299UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.299UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.299UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.299UserPromptSubmit Documentation arrivedAnthropic's documentation has since written up UserPromptSubmit, on Intercept and control agent behavior with hooks.
the line in the docs

* `UserPromptSubmit` and [`UserPromptExpansion`](/docs/en/hooks#userpromptexpansion): Claude Code blocks the prompt with a message naming the hook and the timeout, and the session continues. Before v2.1.208, Claude Code ended the query wit…

v2.1.300updatedInput Documentation arrivedAnthropic's documentation has since written up updatedInput, on Intercept and control agent behavior with hooks.
the line in the docs

This example intercepts Write tool calls and rewrites the `file_path` argument to prepend `/sandbox`. The callback returns `updatedInput` with the modified path and `permissionDecision: 'allow'` to auto-approve the rewritten operation:

v2.1.300updatedInput Documentation arrivedAnthropic's documentation has since written up updatedInput, on Intercept and control agent behavior with hooks.
the line in the docs

This example intercepts Write tool calls and rewrites the `file_path` argument to prepend `/sandbox`. The callback returns `updatedInput` with the modified path and `permissionDecision: 'allow'` to auto-approve the rewritten operation:

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