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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
v2.1.277backgrounding Documentation arrivedA small documentation edit on Tools reference touched a line naming backgrounding after this was published.
the line in the docs

Setting [`CLAUDE_CODE_DISABLE_BACKGROUND_TASKS=1`](/docs/en/env-vars#variables) or running in [bare mode](/docs/en/headless#start-faster-with-bare-mode) disables auto-backgrounding along with the rest of the background task functionality, …
v2.1.277backgrounding Documentation arrivedA small documentation edit on Tools reference touched a line naming backgrounding after this was published.
the line in the docs

Setting [`CLAUDE_CODE_DISABLE_BACKGROUND_TASKS=1`](/docs/en/env-vars#variables) or running in [bare mode](/docs/en/headless#start-faster-with-bare-mode) disables auto-backgrounding along with the rest of the background task functionality, …
v2.1.277backgrounding Documentation arrivedA small documentation edit on Tools reference touched a line naming backgrounding after this was published.
the line in the docs

Setting [`CLAUDE_CODE_DISABLE_BACKGROUND_TASKS=1`](/docs/en/env-vars#variables) or running in [bare mode](/docs/en/headless#start-faster-with-bare-mode) disables auto-backgrounding along with the rest of the background task functionality, …
v2.1.283claude --remote Documentation arrivedAnthropic's documentation has since written up claude --remote, on Continue local sessions from any device with Remote Control.
the line in the docs

* **With `/remote-control`, `claude --remote-control`, or [auto-connect](#enable-remote-control-for-all-sessions)**: the session keeps running without Remote Control, and Claude Code archives it at claude.ai
v2.1.285--remote Documentation arrivedAnthropic's documentation has since written up --remote, on Continue local sessions from any device with Remote Control.
the line in the docs

* **With `/remote-control`, `claude --remote-control`, or [auto-connect](#enable-remote-control-for-all-sessions)**: the session keeps running without Remote Control, and Claude Code archives it at claude.ai
v2.1.286--bare Documentation arrivedAnthropic's documentation has since written up --bare, on Run Claude Code programmatically.
the line in the docs

Before v2.1.286, these limits held only partly: an interactive `--bare` session connected the MCP servers that a normal session would, every `--bare` session sent system reminders, and background tasks stayed available.
v2.1.286--mcp-config Documentation arrivedAnthropic's documentation has since written up --mcp-config, on Run Claude Code programmatically.
the line in the docs

* **MCP servers**: only servers supplied on the command line connect, for example with `--mcp-config`. In an interactive session, Claude Code also skips the automatic IDE connection unless you pass `--ide`.
v2.1.286/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.286/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.286/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.286/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.285/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.277/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.271/ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming /ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.261claude ultrareview Documentation arrivedA small documentation edit on Code Review touched a line naming claude ultrareview after this was published.
the line in the docs

To run a cloud review from a script or CI job, use the [`claude ultrareview` subcommand](/docs/en/ultrareview#run-ultrareview-non-interactively), which waits for the findings and prints them to stdout.
v2.1.286/compact Documentation arrivedAnthropic's documentation has since written up /compact, on Orchestrate teams of Claude Code sessions.
the line in the docs

* `/compact`, `/clear`, and `/rewind` act on the lead's conversation, so Claude Code asks you to confirm before running one of them from this view.
v2.1.280SKILL.md Documentation arrivedA small documentation edit on Admin controls touched a line naming SKILL.md after this was published.
the line in the docs

To let members manage their own skills, host them in a GitHub repository. Put one `skills/<name>/SKILL.md` folder per skill in the repository and share the link. Members import them in the Claude Science app under **Settings** > **Skills**…
v2.1.281TMPDIR Documentation arrivedA small documentation edit on Choose a sandbox environment touched a line naming TMPDIR after this was published.
the line in the docs

* The directory where Claude Code writes runtime files. Unless you set [`CLAUDE_CODE_TMPDIR`](/docs/en/env-vars), that directory is:
v2.1.281TMPDIR Documentation arrivedA small documentation edit on Choose a sandbox environment touched a line naming TMPDIR after this was published.
the line in the docs

* The directory where Claude Code writes runtime files. Unless you set [`CLAUDE_CODE_TMPDIR`](/docs/en/env-vars), that directory is:
v2.1.277TMPDIR Documentation arrivedA small documentation edit on Choose a sandbox environment touched a line naming TMPDIR after this was published.
the line in the docs

* The directory where Claude Code writes runtime files. Unless you set [`CLAUDE_CODE_TMPDIR`](/docs/en/env-vars), that directory is:
v2.1.277TMPDIR Documentation arrivedA small documentation edit on Choose a sandbox environment touched a line naming TMPDIR after this was published.
the line in the docs

* The directory where Claude Code writes runtime files. Unless you set [`CLAUDE_CODE_TMPDIR`](/docs/en/env-vars), that directory is:
v2.1.281ui.render Documentation arrivedA small documentation edit on Mods reference touched a line naming ui.render after this was published.
the line in the docs

Elements are the building blocks of a tree a `ui.render` hook returns, and you get them from `$.ui.resolve(e)`. [Build a tree from elements](/docs/en/plugins/mods/interface#build-a-tree-from-elements) shows the common ones with how the ter…
v2.1.277ui.render Documentation arrivedA small documentation edit on Mods reference touched a line naming ui.render after this was published.
the line in the docs

Elements are the building blocks of a tree a `ui.render` hook returns, and you get them from `$.ui.resolve(e)`. [Build a tree from elements](/docs/en/plugins/mods/interface#build-a-tree-from-elements) shows the common ones with how the ter…
v2.1.267ui.resolve Documentation arrivedA small documentation edit on Mods reference touched a line naming ui.resolve after this was published.
the line in the docs

Elements are the building blocks of a tree a `ui.render` hook returns, and you get them from `$.ui.resolve(e)`. [Build a tree from elements](/docs/en/plugins/mods/interface#build-a-tree-from-elements) shows the common ones with how the ter…
v2.1.267ui.resolve Documentation arrivedA small documentation edit on Mods reference touched a line naming ui.resolve after this was published.
the line in the docs

Elements are the building blocks of a tree a `ui.render` hook returns, and you get them from `$.ui.resolve(e)`. [Build a tree from elements](/docs/en/plugins/mods/interface#build-a-tree-from-elements) shows the common ones with how the ter…
v2.1.282/sandbox Documentation arrivedA small documentation edit on Mods overview touched a line naming /sandbox after this was published.
the line in the docs

Mods aren't sandboxed. If you turn on [sandboxing](/docs/en/sandboxing), the sandbox isolates the Bash commands Claude runs, and a process that a mod starts runs outside it.
v2.1.282/sandbox Documentation arrivedA small documentation edit on Mods overview touched a line naming /sandbox after this was published.
the line in the docs

Mods aren't sandboxed. If you turn on [sandboxing](/docs/en/sandboxing), the sandbox isolates the Bash commands Claude runs, and a process that a mod starts runs outside it.
v2.1.286cc-plugin-sec-default@builtin Documentation arrivedAnthropic's documentation has since written up cc-plugin-sec-default@builtin, on Manage mods for your organization.
the line in the docs

"cc-plugin-sec-default@builtin": {
v2.1.285cc-plugin-sec-default@builtin Documentation arrivedAnthropic's documentation has since written up cc-plugin-sec-default@builtin, on Manage mods for your organization.
the line in the docs

"cc-plugin-sec-default@builtin": {
v2.1.286bunfig.toml Documentation arrivedAnthropic's documentation has since written up bunfig.toml, on Plugin loading reference.
the line in the docs

* **A separate install folder**: the package manager runs in a folder of its own that holds only a copy of the checked dependency list, so npm and Bun don't read the plugin's `.npmrc`, `.env`, or `bunfig.toml`. When the install succeeds, C…
v2.1.286package-lock.json Documentation arrivedAnthropic's documentation has since written up package-lock.json, on Plugin loading reference.
the line in the docs

| `npm-shrinkwrap.json` or `package-lock.json` | npm |
v2.1.286bun.lockb Documentation arrivedAnthropic's documentation has since written up bun.lockb, on Plugin loading reference.
the line in the docs

* **`bun.lockb`**: Bun's binary lockfile can't be checked. Ship a text `bun.lock` or an npm lockfile instead
v2.1.286bun.lock Documentation arrivedAnthropic's documentation has since written up bun.lock, on Plugin loading reference.
the line in the docs

| `bun.lock` | Bun |
v2.1.281claude plugin test Documentation arrivedAnthropic's documentation has since written up claude plugin test, on Plugin commands reference.
the line in the docs

claude plugin test [directory]
v2.1.280claude plugin test Documentation arrivedAnthropic's documentation has since written up claude plugin test, on Plugin commands reference.
the line in the docs

claude plugin test [directory]
v2.1.271claude plugin test Documentation arrivedAnthropic's documentation has since written up claude plugin test, on Plugin commands reference.
the line in the docs

claude plugin test [directory]
v2.1.284claude-sonnet-5-5 Documentation arrivedA small documentation edit on Agent SDK reference - Python touched a line naming claude-sonnet-5-5 after this was published.
the line in the docs

On the Claude API, the `context-1m-2025-08-07` beta is retired for Claude Sonnet 4.5 and Claude Sonnet 4. If you still pass it with either model, requests that exceed the standard 200K-token context window return an error, so remove it fro…
v2.1.284claude-sonnet-5-5 Documentation arrivedA small documentation edit on Agent SDK reference - Python touched a line naming claude-sonnet-5-5 after this was published.
the line in the docs

On the Claude API, the `context-1m-2025-08-07` beta is retired for Claude Sonnet 4.5 and Claude Sonnet 4. If you still pass it with either model, requests that exceed the standard 200K-token context window return an error, so remove it fro…
v2.1.284claude-sonnet-5-5 Documentation arrivedA small documentation edit on Agent SDK reference - Python touched a line naming claude-sonnet-5-5 after this was published.
the line in the docs

On the Claude API, the `context-1m-2025-08-07` beta is retired for Claude Sonnet 4.5 and Claude Sonnet 4. If you still pass it with either model, requests that exceed the standard 200K-token context window return an error, so remove it fro…
v2.1.285claude-sonnet-5 Documentation arrivedA small documentation edit on Agent SDK reference - Python touched a line naming claude-sonnet-5 after this was published.
the line in the docs

On the Claude API, the `context-1m-2025-08-07` beta is retired for Claude Sonnet 4.5 and Claude Sonnet 4. If you still pass it with either model, requests that exceed the standard 200K-token context window return an error, so remove it fro…
v2.1.283claude --remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming claude --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.285--remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.283--remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.283--remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.282--remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.275--remote Documentation arrivedA small documentation edit on Continue local sessions from any device with Remote Control touched a line naming --remote after this was published.
the line in the docs

To bring back a session you started with `claude --remote-control` or `/remote-control`, resume the conversation with `claude --continue` or `claude --resume`. For the permission mode that the resumed conversation starts in, see [permissio…
v2.1.286/clear Documentation arrivedAnthropic's documentation has since written up /clear, on Troubleshooting.
the line in the docs

If the error comes back after a `/clear`, run [`/context`](/docs/en/debug-your-config) and compare the `Messages` row with the rows above it:
v2.1.275command.run Documentation arrivedAnthropic's documentation has since written up command.run, on Troubleshoot a mod.
the line in the docs

### `no command.run hook answered it`
v2.1.265command.run Documentation arrivedAnthropic's documentation has since written up command.run, on Troubleshoot a mod.
the line in the docs

### `no command.run hook answered it`
v2.1.265command.run Documentation arrivedAnthropic's documentation has since written up command.run, on Troubleshoot a mod.
the line in the docs

### `no command.run hook answered it`
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