HomeDocs changes
Documentation changes
What the docs quietly changed.
Anthropic's published documentation, fetched on a schedule and diffed against the last copy. Every edit dated, including the ones that never made a release note.
Last poll read all 4 cleanly: Claude Code CLI, Claude Developer Platform, Claude Documentation, Model Context Protocol. A date here is when this site noticed, not when Anthropic edited.
Claude Developer Platform
821pages tracked
767 changed this week · last read 24 Oct 2026
Claude Code CLI
228pages tracked
146 changed this week · last read 24 Oct 2026
Claude Documentation
280pages tracked
69 changed this week · last read 24 Oct 2026
Model Context Protocol
357pages tracked
171 changed this week · last read 24 Oct 2026
100 on this page
ReadSourcePageWhatLines
1 Oct 2026
472 pages
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claude-code
agent-sdk/hooks
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agent-sdk/hooks
To confirm the block, register the callback under `PreToolUse` with a `Write|Edit` matcher and ask the agent to create a file under `/etc`: the Write tool's result in the message s
The example below registers three independent checks for every tool call:
The example below registers three independent checks for every tool call. The hook names in it, such as `audit_logger` in Python or `auditLogger` in TypeScript, stand in for callba
Use multi-tool matchers to share one callback across related tools. This example registers three matchers with different scopes:
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worktrees
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worktrees
Claude Code writes a marker into the git metadata of every worktree it creates with git, and the sweep keeps any worktree without one, including a worktree a [`WorktreeCreate` hook
Claude Code writes a marker into the git metadata of every worktree it creates with git, and the sweep keeps any worktree without one, including a worktree a [`WorktreeCreate` hook
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ultrareview
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ultrareview
For repositories on `github.com`, the sandbox clones with the GitHub account connected to your Claude account, so the account must be able to read the PR's repository. Claude Code
For repositories on `github.com`, the sandbox clones with the GitHub account connected to your Claude account, so the account must be able to read the PR's repository.
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tools-reference
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tools-reference
* **Bash, PowerShell, and Monitor**: Claude Code keeps Bash, PowerShell, and Monitor tool commands under the cap whatever you list
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settings-reference
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settings-reference
Add your own tips to the [spinner tips](#spinnertipsenabled) that Claude Code shows while Claude works, or replace the built-in tips with yours. Claude Code puts your tips in the s
Add your own tips to the [spinner tips](#spinnertipsenabled) that Claude Code shows while Claude works, or replace the built-in tips with yours. Claude Code puts your tips in the s
Tip objects, `tipsFile`, `label`, and the Scope line's rule that project and local settings contribute plain strings only require Claude Code v2.1.247 or later. On earlier versions
Tip objects, `tipsFile`, `label`, and the Scope line's rule that project and local settings contribute plain strings only require Claude Code v2.1.247 or later.
* `true`: Claude Code turns the Artifact tool off for every session the file applies to, and no other file turns it back on. Before v2.1.242, a higher-precedence file could overr
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self-hosted-environments
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self-hosted-environments
* **Claude Tag channel sessions**: Claude runs them with no user account attached, so the owner is the [Claude Tag agent](https://claude.com/docs/claude-tag/concepts/glossary#agent
* **Claude Tag channel sessions**: Claude runs them with no user account attached, so the owner is the [Claude Tag agent](https://claude.com/docs/claude-tag/concepts/glossary#agent
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scheduled-tasks
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scheduled-tasks
Dynamically chosen intervals and the [built-in maintenance prompt](#run-the-built-in-maintenance-prompt) work on every provider, and with [feature-flag fetching](/docs/en/env-var
Dynamically chosen intervals and the [built-in maintenance prompt](#run-the-built-in-maintenance-prompt) work on every provider, and with [feature-flag fetching](/docs/en/env-var
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permissions
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permissions
| Inline [`mcpServers`](/docs/en/sub-agents#scope-mcp-servers-to-a-subagent) in the frontmatter of a subagent from the repository or an `--add-dir` directory. Before v2.1.238, Clau
| Inline [`mcpServers`](/docs/en/sub-agents#scope-mcp-servers-to-a-subagent) in the frontmatter of a subagent from the repository or an `--add-dir` directory | Not used, and no dia
| A [`headersHelper`](/docs/en/mcp#trust-a-folder-before-its-headershelper-runs) on a server in `.mcp.json`. Before v2.1.238, Claude Code ran the helper in both situations | Not ru
| A [`headersHelper`](/docs/en/mcp#trust-a-folder-before-its-headershelper-runs) on a server in `.mcp.json` | Not run until you accept the trust dialog, which appears again naming
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network-config
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network-config
| `*.frame.claudeusercontent.com` | [Artifact](/docs/en/artifacts) content reads. The CLI fetches an artifact's files from this host when Claude opens one, and only when the Artifa
| `*.frame.claudeusercontent.com` | [Artifact](/docs/en/artifacts) content reads. The CLI fetches an artifact's files from this host when Claude opens one, and only when the Artifa
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mcp
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mcp
* `⊘ Disabled for this project (re-enable via /mcp)`: a server that the project's [`disabledMcpServers`](#disable-a-server-without-removing-it) list names. Claude Code shows it in
* `⊘ Disabled for this project (re-enable via /mcp)`: a server that the project's [`disabledMcpServers`](#disable-a-server-without-removing-it) list names. Claude Code shows it in
When an HTTP or SSE server's first connection fails with a transient error, such as a 5xx response, a connection refused, or a timeout, Claude Code retries up to three times. If th
When an HTTP or SSE server's first connection fails with a transient error, such as a 5xx response, a connection refused, or a timeout, Claude Code retries up to three times. If th
Claude Code runs the checks after the [root-level combinator rewrite](#tool-input-schemas-with-a-root-level-combinator), on the schema it would actually send.
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llm-gateway-protocol
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llm-gateway-protocol
* `Authorization`: `ANTHROPIC_AUTH_TOKEN` as a bearer token, otherwise the [`apiKeyHelper`](/docs/en/llm-gateway-connect#rotate-credentials-with-apikeyhelper) value as a bearer tok
* `Authorization`: `ANTHROPIC_AUTH_TOKEN` as a bearer token, otherwise the [`apiKeyHelper`](/docs/en/llm-gateway-connect#rotate-credentials-with-apikeyhelper) value as a bearer tok
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keybindings
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keybindings
Before v2.1.247, pressing a Ctrl shortcut under a non-Latin layout didn't trigger its binding in terminals that use the Kitty keyboard protocol, such as Ghostty, Kitty, WezTerm, an
* Unknown action names, such as a typo of a registered action. Claude Code skips the binding and keeps any default binding for that key in effect. Before v2.1.246, a binding with a
* Unknown action names, such as a typo of a registered action. Claude Code skips the binding and keeps any default binding for that key in effect.
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hooks
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hooks
| `Bash(cat *)` | `echo before $(date) after` | no | a substitution can sit at any argument position, so the full command and `date` are both checked; neither matches `cat *` |
| `Bash(git *)` | `$TOOL git push` | yes | Claude Code can't tell what the command name expands to, so it runs the hook |
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errors
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errors
| `Claude Code's fullscreen renderer didn't finish starting last time on this machine` / `Claude Code's fullscreen renderer has repeatedly failed to start on this machine` | [Confi
| `Claude Code's fullscreen renderer didn't finish starting last time on this machine` / `Claude Code's fullscreen renderer has repeatedly failed to start on this machine` | [Fulls
Claude Code matches these hosts by URL, so the message appears when a server you added with `claude mcp add` or in `.mcp.json` points at one of them.
Before v2.1.251, Claude Code loaded a `commands` path declared in a marketplace entry even when it pointed outside the plugin directory. Claude Code already rejected paths declared
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costs
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costs
* **Misses**: requests that re-processed content the cache already held, with the time of the last miss and how many tokens those requests wrote back to the cache. Claude Code coun
* **Misses**: requests that re-processed content the cache already held, with the time of the last miss and how many tokens those requests wrote back to the cache. [Actions that in
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auto-mode-config
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auto-mode-config
To view and edit classifier rules without opening a settings file, run [`/permissions`](/docs/en/permissions#manage-permissions) and select the **Auto mode** tab. The tab requires
The tab lists the `allow`, `soft_deny`, `hard_deny`, and `environment` entries from each of the [scopes the classifier reads](#where-the-classifier-reads-configuration), and shows
* Add, edit, or delete rules in the `allow`, `soft_deny`, and `hard_deny` sections. When you add the first rule to a section, Claude Code also inserts `"$defaults"` so the [built-i
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artifacts
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artifacts
Once you turn artifacts off in a [`--settings`](/docs/en/cli-reference#cli-flags) file or with `CLAUDE_CODE_DISABLE_ARTIFACT`, or your administrator turns them off in [managed sett
Once you turn artifacts off in a [`--settings`](/docs/en/cli-reference#cli-flags) file or with `CLAUDE_CODE_DISABLE_ARTIFACT`, or your administrator turns them off in [managed sett
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agent-view
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agent-view
#### Terminal host died
On Linux and WSL, the supervisor checks each host process every few seconds, whether or not you open the session, and marks the session failed when the process has exited but its c
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claude-tag
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permission-modes
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permission-modes
| `claude -p`, or the [Python Agent SDK](/docs/en/agent-sdk/python#claudeagentoptions) without `permission_mode` | `default` in sessions that [fetch feature flags](/docs/en/env-var
| `claude -p` or the [Agent SDK](/docs/en/agent-sdk/permissions#permission-modes) | `default` in sessions that [fetch feature flags](/docs/en/env-vars#features-that-need-feature-fl
The session's first auto-mode request validates the Sonnet 5 default: if the request succeeds, Sonnet 5 stays the session's classifier model, and if it fails because the model
The session's first auto-mode request validates the Sonnet 5 default: if the request succeeds, Sonnet 5 stays the session's classifier model, and if it fails because the model
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agent-sdk/typescript
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agent-sdk/typescript
| `permissionMode` | [`PermissionMode`](#permissionmode) | `'default'` | Permission mode for the session |
| `permissionMode` | [`PermissionMode`](#permissionmode) | `undefined` | Permission mode for the session. If you omit it, the session can start in auto mode. See [Permission modes]
| `toggleMcpServer(serverName, enabled)` | Enable or disable an MCP server by name, with the same name resolution as `reconnectMcpServer()`. Disabling disconnects the server |
| `toggleMcpServer(serverName, enabled)` | Enable or disable an MCP server by name, with the same name resolution as `reconnectMcpServer()`. Disabling a stdio, SSE, or HTTP server
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agent-sdk/permissions
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agent-sdk/permissions
If you don't set one, Claude Code picks the starting permission mode by the rules in [Which mode a session starts in](/docs/en/permission-modes#which-mode-a-session-starts-in):
* A `permissions.defaultMode` from the session's [settings files](/docs/en/settings#where-settings-live) when one applies
* Otherwise the built-in default, which can be [auto mode](/docs/en/permission-modes#eliminate-prompts-with-auto-mode)
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interactive-mode
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interactive-mode
When a command reaches its timeout before it finishes, Claude Code automatically [moves it to the background](/docs/en/tools-reference#foreground-commands-that-move-to-the-backgrou
When a command reaches its timeout before it finishes, Claude Code automatically [moves it to the background](/docs/en/tools-reference#foreground-commands-that-move-to-the-backgrou
To disable all background task functionality, set the `CLAUDE_CODE_DISABLE_BACKGROUND_TASKS` environment variable to `1`. See [Environment variables](/docs/en/env-vars) for details
To disable all background task functionality, set the [`CLAUDE_CODE_DISABLE_BACKGROUND_TASKS`](/docs/en/env-vars#variables) environment variable to `1`. Starting in [bare mode](/do
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vs-code
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vs-code
* **Status Bar**: if you've set [`preferredLocation`](#extension-settings) to `sidebar`, or opened Claude with **Claude Code: Open in Side Bar**, click **✻ Claude Code** in the
* **Status Bar**: click **✻ Claude Code** in the bottom-right corner of the window. This works even when no file is open.
Alternatively, if you've set [`preferredLocation`](#extension-settings) to `sidebar`, or opened Claude with **Claude Code: Open in Side Bar**, click "✻ Claude Code" in the **Status
Alternatively, click **✻ Claude Code** in the **Status Bar** at the bottom-right corner of the window. This works even without a file open. You can also use the **Command Palette**
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model-config
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model-config
When the primary model is overloaded, unavailable, or returns another non-retryable server error, Claude Code can switch to a fallback model instead of failing the request. Authent
When the primary model is overloaded, unavailable, or returns another non-retryable server error, Claude Code can switch to a fallback model instead of failing the request. Authent
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google-vertex-ai
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google-vertex-ai
When these checks find a model your project can't invoke, Claude Code remembers the refusal on this machine for up to a day, and launches during that time skip the remembered model
### When a model is disabled mid-session
If your project loses access to the model your session is running on, for example because an administrator disables it in [Model Garden](https://console.cloud.google.com/vertex-ai/
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errors
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errors
If Claude's answers seem less capable than you expect but no error is shown, the cause is usually conversation state rather than the model itself. Claude Code doesn't silently chan
If Claude's answers seem less capable than you expect but no error is shown, the cause is usually conversation state rather than the model itself. Claude Code doesn't silently chan
* An Amazon Bedrock or Google Cloud's Agent Platform startup check finds your default model unavailable
* An Amazon Bedrock or Google Cloud's Agent Platform startup check finds your default model unavailable, or your account [loses access to it mid-session](/docs/en/amazon-bedrock#wh
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amazon-bedrock
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amazon-bedrock
When these checks find a model your account can't invoke, Claude Code remembers the refusal on this machine for up to a day, and launches during that time skip the remembered model
### When a model is disabled mid-session
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mcp-quickstart
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mcp-quickstart
* The command starts and waits for input: the server itself works. Run `claude mcp get <name>` and confirm the command shown there matches what you just ran. If the command sho
* The command starts and waits for input: the server itself works.
Run `claude mcp get <name>` and confirm the command shown there matches what you just ran. If the command shown differs from what you typed, you likely omitted the `--` separ
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mcp
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mcp
* **Reserved names**: Claude Code reserves the names of its built-in servers, including `workspace`, `claude-in-chrome`, `computer-use`, `Claude Preview`, and `Claude Browser`. If
* **Reserved names**: Claude Code reserves the names of its built-in servers, including `workspace`, `claude-in-chrome`, `computer-use`, `Claude Preview`, and `Claude Browser`. If
For a plugin's stdio server, `claude mcp get` prints `Command: stdio`, an empty `Args:` line, and each environment variable as `NAME=[REDACTED]`. The values are hidden because they
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agent-sdk/python
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agent-sdk/python
| `toggle_mcp_server(server_name, enabled)` | Enable or disable an MCP server mid-session. Disabling removes its tools |
| `toggle_mcp_server(server_name, enabled)` | Enable or disable an MCP server mid-session. Disabling a stdio, SSE, or HTTP server removes its tools |
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statusline
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statusline
<img src="https://mintcdn.com/claude-code/nibzesLaJVh4ydOq/images/statusline-multiline.png?fit=max&auto=format&n=nibzesLaJVh4ydOq&q=85&s=60f11387658acc9ff75158ae85f2ac87" alt="A
<img src="https://mintcdn.com/claude-code/HDAmBwgbrZVk0pOt/images/statusline-multiline.png?fit=max&auto=format&n=HDAmBwgbrZVk0pOt&q=85&s=a9d0a2fe8e446d80b1abc46da3f93270" alt="A
<img src="https://mintcdn.com/claude-code/nibzesLaJVh4ydOq/images/statusline-quickstart.png?fit=max&auto=format&n=nibzesLaJVh4ydOq&q=85&s=696445e59ca0059213250651ad23db6b" alt="A
<img src="https://mintcdn.com/claude-code/HDAmBwgbrZVk0pOt/images/statusline-quickstart.png?fit=max&auto=format&n=HDAmBwgbrZVk0pOt&q=85&s=88a7eab9c1038dd098ee8e284d96b7e6" alt="A
<img src="https://mintcdn.com/claude-code/nibzesLaJVh4ydOq/images/statusline-context-window-usage.png?fit=max&auto=format&n=nibzesLaJVh4ydOq&q=85&s=15b58ab3602f036939145dde3165c6
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agent-view
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agent-view
<img src="https://mintcdn.com/claude-code/1B48Qz2Z9hac4SLG/images/agent-view-light.png?fit=max&auto=format&n=1B48Qz2Z9hac4SLG&q=85&s=7a186c96ed47d6700d084d77e786be65" className="da
<img src="https://mintcdn.com/claude-code/1B48Qz2Z9hac4SLG/images/agent-view-dark.png?fit=max&auto=format&n=1B48Qz2Z9hac4SLG&q=85&s=a5bed7434bae368faea3a8f023b52aa2" className="hid
<img src="https://mintcdn.com/claude-code/HDAmBwgbrZVk0pOt/images/agent-view-light.png?fit=max&auto=format&n=HDAmBwgbrZVk0pOt&q=85&s=d6905012bee31f3e6b3920b09c05dd02" className="da
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permission-modes
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permission-modes
| `claude -p` or the [Agent SDK](/docs/en/agent-sdk/permissions) | `default` |
| `claude -p`, or the [Python Agent SDK](/docs/en/agent-sdk/python#claudeagentoptions) without `permission_mode` | `default` in sessions that [fetch feature flags](/docs/en/env-var
On Pro, Max, and Team plans, if your `~/.claude/settings.json` sets a `defaultMode` other than `auto` and no other settings file sets one, your sessions keep starting in that mode.
If your `~/.claude/settings.json` sets a `defaultMode` other than `auto` and no other settings file sets one, your sessions keep starting in that mode. On Pro, Max, and Team plans,
On [Amazon Bedrock](/docs/en/amazon-bedrock), [Google Cloud's Agent Platform](/docs/en/google-vertex-ai), [Microsoft Foundry](/docs/en/microsoft-foundry), and signed-in [Claude app
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headless
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headless
Use `--allowedTools` to let Claude use certain tools without prompting. This example runs a test suite and fixes failures, allowing Claude to execute Bash commands and read/edit fi
Use `--allowedTools` to let Claude use certain tools without prompting. Listing `Read` and `Edit` lets Claude read and edit files without asking for permission. Listing `Bash` does
To set a baseline for the whole session instead of listing individual tools, pass a [permission mode](/docs/en/permission-modes). For `-p`, the [built-in starting permission mode](
To set a baseline for the whole session instead of listing individual tools, pass a [permission mode](/docs/en/permission-modes). A run where nothing sets a permission mode takes t
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llm-gateway
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llm-gateway
This section covers using a gateway product your organization already runs, rather than [Claude apps gateway](/docs/en/claude-apps-gateway). For what a gateway is, how it sits betw
This section covers using a gateway product your organization already runs, rather than [Claude apps gateway](https://code.claude.com/docs/en/claude-apps-gateway). For what a gatew
> * If you're a developer connecting to an existing gateway: [connect Claude Code to your gateway](/docs/en/llm-gateway-connect.md)
> * If you're an admin rolling out a gateway for your organization: [deploy and distribute a gateway](/docs/en/llm-gateway-rollout.md)
> * If you're configuring a gateway product: the [gateway compatibility guide](/docs/en/llm-gateway-protocol.md)
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llm-gateway
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llm-gateway
This section covers using a gateway product your organization already runs, rather than [Claude apps gateway](/docs/en/claude-apps-gateway). For what a gateway is, how it sits betw
This section covers using a gateway product your organization already runs, rather than [Claude apps gateway](/docs/en/claude-apps-gateway). For what a gateway is, how it sits betw
> * If you're a developer connecting to an existing gateway: [connect Claude Code to your gateway](/docs/en/llm-gateway-connect)
> * If you're an admin rolling out a gateway for your organization: [deploy and distribute a gateway](/docs/en/llm-gateway-rollout)
> * If you're configuring a gateway product: the [gateway compatibility guide](/docs/en/llm-gateway-protocol)
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llm-gateway
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llm-gateway
<Note>
* If you're a developer connecting to an existing gateway: [connect Claude Code to your gateway](/docs/en/llm-gateway-connect)
* If you're an admin rolling out a gateway for your organization: [deploy and distribute a gateway](/docs/en/llm-gateway-rollout)
* If you're configuring a gateway product: the [gateway compatibility guide](/docs/en/llm-gateway-protocol)
</Note>
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claude-code
third-party-integrations
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third-party-integrations
To limit which of these deployment options a managed machine may use, set [`allowedProviders`](/docs/en/settings-reference#allowedproviders) in managed settings. For example, `["be
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claude-code
settings-reference
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settings-reference
| [`allowedProviders`](#allowedproviders) | Limit which [API providers](/docs/en/third-party-integrations) a machine may use | Authentication and providers | Managed |
### `allowedProviders`
List the services a machine may reach Claude through, such as the Anthropic API, Amazon Bedrock, or an LLM gateway. A session on a provider that isn't listed is refused at startup,
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server-managed-settings
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server-managed-settings
Three kinds of keys are exceptions to the no-merge rule:
These keys are exceptions to the no-merge rule:
* **`allowedProviders`**: a list set on the machine and a server-managed list combine as [its entry's Scope note](/docs/en/settings-reference#allowedproviders) states. Requires Cla
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monitoring-usage
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monitoring-usage
* `"policy_invalid"`: the managed settings contain an error that stops Claude Code from starting, or an admin source failed to load, so Claude Code can't check organization login
* `"policy_invalid"`: the managed settings contain an error that stops Claude Code from starting, or an admin source failed to load for a reason other than a denied read, so Clau
* `"provider_not_allowed"`: the session would use an API provider, or send a provider's traffic to a host, that the managed [`allowedProviders`](/docs/en/settings-reference#allow
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managed-settings
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managed-settings
[`allowedProviders`](/docs/en/settings-reference#allowedproviders) has its own rule: its entry's Scope note says how a list set on the machine combines with a server-managed one. R
If a managed settings file, drop-in file, or `managed-settings.d/` directory can't be read and no admin source supplies a policy, sessions signed in with claude.ai or Claude Consol
When a managed settings file, drop-in file, `managed-settings.d/` directory, MDM profile, or HKLM registry value exists but can't be read, and no admin source supplies a policy, wh
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claude-code
llm-gateway
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claude-codechanged
llm-gateway
To make a gateway reached through `ANTHROPIC_BASE_URL` the only destination a managed machine may use, set [`allowedProviders`](/docs/en/settings-reference#allowedproviders) to `["
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claude-code
errors
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errors
| `Your organization's managed settings allow Claude Code to use: <providers>` | [Configuration warnings](#managed-settings-dont-allow-this-api-provider) |
| `Your organization's managed settings allow Claude Code to use no API provider at all` | [Configuration warnings](#managed-settings-dont-allow-this-api-provider) |
| `Unable to read managed policy settings` | [Configuration warnings](#unable-to-read-managed-policy-settings) |
You ran [`/desktop`](/docs/en/desktop#coming-from-the-cli), or its alias `/app`, and the system command Claude Code uses to open Claude Desktop failed. The session stays in the ter
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claude-code
claude-apps-gateway-config
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claude-apps-gateway-config
To stop developers from bypassing the gateway with a cloud provider variable or an `ANTHROPIC_BASE_URL` of their own, add `"allowedProviders": ["gateway"]` to the same file. Claude
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authentication
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claude-codechanged
authentication
### Restrict which API providers a machine may use
[`allowedProviders`](/docs/en/settings-reference#allowedproviders) in [managed settings](/docs/en/managed-settings) lists which services a managed machine may reach Claude through,
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claude-code
agent-sdk/typescript
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agent-sdk/typescript
| "provider_not_allowed"
| `provider_not_allowed` | Managed settings [list the API providers this machine may use](/docs/en/settings-reference#allowedproviders), and the session is set up for a provider th
Executes Bash commands with optional timeout and background execution. The working directory persists between commands, including commands run in later turns of a multi-turn sessio
Executes Bash commands with optional timeout and background execution. The working directory persists between commands, including commands run in later turns of a multi-turn sessio
When a subagent running in the foreground owns a backgrounded command, the command [ends when that subagent's run ends](/docs/en/tools-reference#background-commands). Claude Code s
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admin-setup
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claude-codechanged
admin-setup
| [Provider restrictions](/docs/en/settings-reference#allowedproviders) | Limit which API providers a machine may use. A session on a provider that isn't listed is refused at start
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tools-reference
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tools-reference
For a command that Claude starts in the background, `timeout` instead sets how long the command may run there, with the separate default and maximum described under [Background com
For a command that Claude starts in the background, `timeout` instead sets how long the command may run there, with the separate default and maximum described under [Time limit for
A command that a [foreground subagent](/docs/en/sub-agents#run-subagents-in-foreground-or-background) started stops when that subagent's run ends, whether it finished, failed, or w
#### When a background command stops
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skills
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skills
* **Timeout**: each command runs under the Bash tool's default 2-minute [timeout](/docs/en/tools-reference#timeout-and-output-limits). When the Bash tool [moves a timed-out command
* **Timeout**: each command runs under the Bash tool's default 2-minute [timeout](/docs/en/tools-reference#timeout-and-output-limits). When the Bash tool [moves a timed-out command
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interactive-mode
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interactive-mode
When a command reaches its timeout before it finishes, Claude Code automatically [moves it to the background](/docs/en/tools-reference#background-commands) instead of stopping it,
When a command reaches its timeout before it finishes, Claude Code automatically [moves it to the background](/docs/en/tools-reference#foreground-commands-that-move-to-the-backgrou
* Background Bash and PowerShell commands have a time limit, counted from the moment the command enters the background: 30 minutes, or the `timeout` Claude asks for when it starts
* Set [`BASH_DEFAULT_TIMEOUT_MS`](/docs/en/env-vars) above `1800000` to replace the 30-minute default with that value, for moved commands as well
* Set [`BASH_MAX_TIMEOUT_MS`](/docs/en/env-vars) above `7200000` to raise the 2-hour maximum. Setting `BASH_DEFAULT_TIMEOUT_MS` above `7200000` raises it the same way
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hooks
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hooks
| `updatedInput` | Modifies the tool's input parameters before execution. Replaces the entire input object, so include unchanged fields alongside modified ones. Claude Code evaluat
| `updatedInput` | Modifies the tool's input parameters before execution. Replaces the entire input object, so include unchanged fields alongside modified ones. Claude Code evaluat
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cloud-environments
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cloud-environments
When a command reaches its [timeout](/docs/en/tools-reference#timeout-and-output-limits), Claude Code [moves it to the background](/docs/en/tools-reference#background-commands) i
When a command reaches its [timeout](/docs/en/tools-reference#timeout-and-output-limits), Claude Code [moves it to the background](/docs/en/tools-reference#foreground-commands-th
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agent-sdk/python
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agent-sdk/python
For what sets the foreground ceiling, see [Timeout and output limits](/docs/en/tools-reference#timeout-and-output-limits). For the background time limit, see [Background commands](
For what sets the foreground ceiling, see [Timeout and output limits](/docs/en/tools-reference#timeout-and-output-limits). For the background time limit, see [Time limit for backgr
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sessions
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sessions
<span id="resume-a-running-background-session" />
When the conversation you resume with `claude --resume` or `/resume` belongs to a [background session](/docs/en/agent-view) that is still running, Claude Code opens the running ses
* **From your shell**: `claude --resume <session>` runs [`claude attach`](/docs/en/agent-view#attach-to-a-session) on that session in the same terminal instead of loading the trans
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desktop
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desktop
From your shell, [`claude --desktop`](/docs/en/cli-reference#cli-flags) opens Desktop directly without starting a terminal session. It requires Claude Code v2.1.285 or later and ha
```bash theme={null}
claude --desktop --resume <session-id>
```
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claude-tag
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claude-tag
No line of the body moved in this read.
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vs-code
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vs-code
* **Installed plugins** appear at the top with toggle switches to enable or disable them
* **Installed plugins** appear at the top with toggle switches to enable or disable them.
* If you turn off a plugin that your project's shared `.claude/settings.json` turns on, the extension asks first: **Disable for me** turns it off only for you, while **Disable fo
Once the install finishes, a form asks for any of the plugin's [configuration options](/docs/en/plugins/components#user-configuration) that aren't set yet. To review or change the
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plugins/troubleshooting
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plugins/troubleshooting
<h3 id="invalid-git-url">
`Invalid git URL`
</h3>
You added a marketplace, installed a plugin, or ran an update from a git address, and the command failed with `Invalid git URL` in its message.
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plugins/install
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plugins/install
* **Active, but a server needs setup**: `Plugin is now active.` is followed by `Its bundled MCP server needs configuration before it can start`. The plugin's [bundled MCP s
* **SSH**: the host must already be in your `known_hosts` file and the key must work without a passphrase prompt, because the host-fingerprint and passphrase prompts are suppressed
* **SSH**: the host must already be in your `known_hosts` file and the key must work without a passphrase prompt. If your git setup names an SSH program in `GIT_SSH_COMMAND`, `GIT_
* Press **Enter** to open a plugin's details. The menu there offers **Disable plugin** or **Enable plugin**, **Update now**, and **Uninstall**. Plugins that take settings also offe
* Press **Enter** to open a plugin's details.
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plugins/components
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plugins/components
A bundle's own manifest can declare settings the server needs from the user in a `user_config` block. A bundled server with a required setting that has no saved value doesn't start
Users supply the values in one of two ways:
* **In `/plugin`**: select the plugin on the **Installed** tab and choose **Configure**
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plugins/cli-reference
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plugins/cli-reference
* **Plugin arguments**: a `<plugin>` argument is a plugin `name` or `name@marketplace`. When two marketplaces offer the same name, use the qualified form.
* **Plugin arguments**: a `<plugin>` argument is a plugin `name` or `name@marketplace`. When two marketplaces offer the same name, use the qualified form. `configure` takes only th
| `--config <key=value>` | Set a [`userConfig`](/docs/en/plugins/manifest-reference) option the plugin's manifest declares. Repeat the flag for each option. Requires Claude Code v2
| `--config <key=value>` | Set a [`userConfig`](/docs/en/plugins/manifest-reference) option the plugin's manifest declares. Repeat the flag for each option. Requires Claude Code v2
| `--data-size [plugin]` | Measure each installed plugin's [saved data directory](#what-an-uninstall-deletes-and-keeps), or only the named plugin's, given as `name@marketplace`. Ha
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30 Sep 2026
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api
models/sonnet-5-5/whats-new-sonnet-5-5
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models/sonnet-5-5/whats-new-sonnet-5-5
Every thinking block records which model produced it. Each model reads its own blocks and only some other models' blocks. Claude Sonnet 5.5 reads thinking blocks from Claude Sonnet
Every thinking block records which model produced it. Each model reads its own blocks and only some other models' blocks. Claude Sonnet 5.5 reads thinking blocks from Claude Sonnet
So a conversation that moves from Claude Sonnet 5 onto Claude Sonnet 5.5 keeps its reasoning, and one that moves from Claude Sonnet 5.5 to any other model runs the turns after the
So a conversation that moves from Claude Sonnet 5 onto Claude Sonnet 5.5, or from Claude Sonnet 5.5 up to Claude Opus 5.5 on the Claude API, keeps its reasoning, and any other move
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api
models/sonnet-5-5/migration-guide
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models/sonnet-5-5/migration-guide
"thinking.type.disabled" is not supported for this model. Use "thinking.type.between_tools" for the lowest thinking setting, or "thinking.type.adaptive" and "output_config.effort"
To turn thinking off on this model, send "thinking": {"type": "between_tools"} instead of {"type": "disabled"}. The model does not think before responding. The short updates it wri
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models/sonnet-4-5/overview
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models/sonnet-4-5/overview
description: "Claude Sonnet 4.5 reference: lifecycle status, model IDs on every platform, context window, output limits, pricing, and migration resources. Claude Sonnet 4.5 is a le
description: "Claude Sonnet 4.5 reference: lifecycle status, model IDs on every platform, context window, output limits, pricing, and migration resources. Claude Sonnet 4.5 is a de
**Legacy.** Released September 29, 2025.
**Deprecated.** Released September 29, 2025.
Although Claude Sonnet 4.5 is still available, you should consider migrating to Claude Sonnet 5.5 for improved performance. [See Claude Sonnet 5.5](https://platform.claude.com/docs
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api
models/overview
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models/overview
Legacy models (still available): [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/ov
Legacy models (still available): [Claude Fable 5](https://platform.claude.com/docs/en/models/fable-5/overview), [Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/ov
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api
models/opus-5-5/whats-new-opus-5-5
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models/opus-5-5/whats-new-opus-5-5
Every thinking block records which model produced it, and each model reads its own blocks and only some other models'. Claude Opus 5.5 reads thinking blocks from Claude Opus 5 and
Every thinking block records which model produced it, and each model reads its own blocks and only some other models'. Claude Opus 5.5 reads thinking blocks from Claude Opus 5, fro
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api
models/opus-5-5/migration-guide
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models/opus-5-5/migration-guide
* If a router or fallback can move a conversation from Claude Opus 5.5 to another model, expect that model to run without Claude Opus 5.5's thinking blocks (Claude Fable 5.1 and Cl
* If a router or fallback can move a conversation from Claude Opus 5.5 to another model, expect that model to run without Claude Opus 5.5's thinking blocks (Claude Fable 5.1 and Cl
On the Claude API, Claude Fable 5.1 and Claude Mythos 5.1 read Claude Opus 5.5 thinking blocks; no other model does. A router or fallback that moves a conversation from Claude Opus
On the Claude API, Claude Fable 5.1 and Claude Mythos 5.1 read Claude Opus 5.5 thinking blocks; no other model does. A router or fallback that moves a conversation from Claude Opus
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managed-agents/events-and-streaming
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managed-agents/events-and-streaming
Types: []string{"agent.tool_use", "agent.tool_result"},
Types: []anthropic.BetaManagedAgentsSessionEventType{
anthropic.BetaManagedAgentsSessionEventTypeAgentToolUse,
anthropic.BetaManagedAgentsSessionEventTypeAgentToolResult,
},
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managed-agents/define-outcomes
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managed-agents/define-outcomes
import com.anthropic.models.beta.environments.BetaLimitedNetworkParams;
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manage-claude/api-and-data-retention
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manage-claude/api-and-data-retention
* **Claude Code:** ZDR applies when Claude Code is used with API keys from a Commercial organization (an organization under Anthropic's Commercial Terms of Service, as distinct fro
* **Claude Code with API keys:** ZDR applies when Claude Code is used with API keys from a Commercial organization (an organization under Anthropic's Commercial Terms of Service, a
* **Claude Teams and Claude Enterprise product interfaces:** These interfaces are not ZDR-eligible. The exception is Claude Code used through Claude Enterprise with ZDR enabled; se
* **Claude Teams and Claude Enterprise product interfaces:** These interfaces are not ZDR-eligible. The one exception is Claude Code on Claude Enterprise, which has its own ZDR off
Claude Code is eligible for ZDR through two paths:
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manage-claude/access-transparency
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manage-claude/access-transparency
* **Covered content:** Access Transparency covers prompt and response content sent through the Claude Messages API or Claude Code sessions. Anthropic's [general ZDR documentation](
* **Covered content:** Access Transparency covers prompt and response content sent through the Claude Messages API or Claude Code sessions. Anthropic's [general ZDR documentation](
* **Anything ZDR does not cover:** Products that are not covered by ZDR (for example, the Files API, Anthropic-hosted stateful applications, and the Batch API) are not covered by A
* **Anything ZDR does not cover:** Products that are not covered by ZDR (for example, the Files API, Anthropic-hosted stateful applications, and the Batch API) are not covered by A
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build-with-claude/thinking-troubleshooting
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build-with-claude/thinking-troubleshooting
## A 400 error says `"thinking.type.disabled"` is not supported
## A 400 error after sending `thinking: {type: "disabled"}`
"thinking.type.disabled" is not supported for this model. Use "thinking.type.between_tools" for the lowest thinking setting, or "thinking.type.adaptive" and "output_config.effort"
To turn thinking off on this model, send "thinking": {"type": "between_tools"} instead of {"type": "disabled"}. The model does not think before responding. The short updates it wri
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build-with-claude/thinking
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build-with-claude/thinking
**Switching models mid-conversation.** Keep passing thinking blocks back unchanged when you switch models, for example after a [classifier refusal fallback](https://platform.claude
**Switching models mid-conversation.** Keep passing thinking blocks back unchanged when you switch models, for example after a [classifier refusal fallback](https://platform.claude
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build-with-claude/refusals-and-fallback
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build-with-claude/refusals-and-fallback
* Thinking blocks from Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, or Claude Fable 5 pass through unchanged. Each retry re-sends your original request body, and the only
* Thinking blocks from Claude Fable 5.1, Claude Opus 5.5, Claude Sonnet 5.5, or Claude Fable 5 pass through unchanged. Each retry re-sends your original request body, and the only
* **Not redeeming a credit:** you can leave the earlier `thinking` and `redacted_thinking` blocks in place or strip them to save input tokens. The fallback model normally can't
* **Not redeeming a credit:** you can leave the earlier `thinking` and `redacted_thinking` blocks in place or strip them to save input tokens. The fallback model normally can't
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build-with-claude/preserved-thinking
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build-with-claude/preserved-thinking
description: Preserved thinking lets a model use a thinking block from an earlier turn only if that model or an earlier one produced it and nothing before the block has changed.
description: Preserved thinking lets a model use a thinking block from an earlier turn only if that model or one of a fixed set of other models produced it and nothing before the b
Claude Opus 5.5 reads thinking blocks from Claude Opus 5 and earlier Opus, Sonnet, and Haiku models, but not from Claude Fable or Claude Mythos models. On the Claude API, Claude Fa
Claude Sonnet 5.5 reads thinking blocks from Claude Sonnet 5, Claude Opus 4.8, Claude Haiku 4.5, and earlier models, but not from Claude Opus 5, Claude Opus 5.5, or any Claude Fabl
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build-with-claude/claude-platform-on-aws
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build-with-claude/claude-platform-on-aws
| Model | Model ID |
| :---------------- | :------------------ |
| Claude Fable 5.1 | `claude-fable-5-1` |
| Claude Fable 5 | `claude-fable-5` |
| Claude Opus 5.5 | `claude-opus-5-5` |
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build-with-claude/claude-on-vertex-ai
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build-with-claude/claude-on-vertex-ai
| Model | Agent Platform API model ID |
| :--------------------------------------------------------------------------------------------------- | :--------------------------- |
| Claude Fable 5.1 | `claude-fable-5-1` |
| Claude Mythos 5.1 ([limited availability](https://anthropic.com/glasswing)) | `claude-mythos-5-1` |
| Claude Fable 5 | `claude-fable-5` |
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build-with-claude/claude-on-amazon-bedrock-legacy
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build-with-claude/claude-on-amazon-bedrock-legacy
| Model | Base Bedrock model ID | `global` | `us` | `eu` | `jp`
| :--------------------------------------------------------------------------------------------------- | :------------------------------------------ | :------- | :--- | :--- | :---
| Claude Opus 4.6 | `anthropic.claude-opus-4-6-v1` | Yes | Yes | Yes | Yes
| Claude Opus 4.5 | `anthropic.claude-opus-4-5-20251101-v1:0` | Yes | Yes | Yes | No
| Claude Opus 4.1 ([deprecated](https://platform.claude.com/docs/en/about-claude/model-deprecations)) | `anthropic.claude-opus-4-1-20250805-v1:0` | No | Yes | No | No
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build-with-claude/claude-in-microsoft-foundry
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build-with-claude/claude-in-microsoft-foundry
| Model | Default deployment name | Hosted on Azure | Hosted on Anthropic |
| :-------------------------------------------------------------------------- | :---------------------- | :-------------: | :-----------------: |
| Claude Fable 5.1 | `claude-fable-5-1` | | ✓ |
| Claude Mythos 5.1 ([limited availability](https://anthropic.com/glasswing)) | `claude-mythos-5-1` | | ✓ |
| Claude Fable 5 | `claude-fable-5` | | ✓ |
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api/organization/workspaces/update
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api/organization/workspaces/update
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api/organization/workspaces/service_accounts/update
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api/organization/workspaces/service_accounts/update
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api/organization/workspaces/service_accounts/retrieve
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api/organization/workspaces/service_accounts/retrieve
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api/organization/workspaces/service_accounts/remove
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api/organization/workspaces/service_accounts/remove
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api/organization/workspaces/service_accounts/list
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api/organization/workspaces/service_accounts/list
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api/organization/workspaces/service_accounts/add
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api/organization/workspaces/service_accounts/add
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api/organization/workspaces/service_accounts
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api/organization/workspaces/retrieve
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api/organization/workspaces/rate_limits/list
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api/organization/workspaces/rate_limits
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api/organization/workspaces/members/update
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api/organization/workspaces/members/update
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api/organization/workspaces/members/retrieve
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api/organization/workspaces/members/remove
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api/organization/workspaces/members/list
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api/organization/workspaces/members/add
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api/organization/workspaces/members
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api/organization/workspaces/members
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