92| `ANTHROPIC_AWS_API_KEY` | Workspace API key for [Claude Platform on AWS](/en/claude-platform-on-aws), generated in the AWS Console. Sent as `x-api-key` and takes precedence over AWS SigV4 |92| `ANTHROPIC_AWS_API_KEY` | Workspace API key for [Claude Platform on AWS](/en/claude-platform-on-aws), generated in the AWS Console. Sent as `x-api-key` and takes precedence over AWS SigV4 |
93| `ANTHROPIC_AWS_BASE_URL` | Override the [Claude Platform on AWS](/en/claude-platform-on-aws) endpoint URL. Use for custom regions or when routing through an [LLM gateway](/en/llm-gateway). Defaults to `https://aws-external-anthropic.{AWS_REGION}.api.aws` |93| `ANTHROPIC_AWS_BASE_URL` | Override the [Claude Platform on AWS](/en/claude-platform-on-aws) endpoint URL. Use for custom regions or when routing through an [LLM gateway](/en/llm-gateway). Defaults to `https://aws-external-anthropic.{AWS_REGION}.api.aws` |
94| `ANTHROPIC_AWS_WORKSPACE_ID` | Required for [Claude Platform on AWS](/en/claude-platform-on-aws). Sent on every request as the `anthropic-workspace-id` header |94| `ANTHROPIC_AWS_WORKSPACE_ID` | Required for [Claude Platform on AWS](/en/claude-platform-on-aws). Sent on every request as the `anthropic-workspace-id` header |
95| `ANTHROPIC_BASE_URL` | Override the API endpoint to route requests through a proxy or gateway. When set to a non-first-party host, [MCP tool search](/en/mcp#scale-with-mcp-tool-search) is disabled by default. Set `ENABLE_TOOL_SEARCH=true` if your proxy forwards `tool_reference` blocks. {/* min-version: 2.1.196 */}As of v2.1.196, [Remote Control](/en/remote-control#requirements) is disabled when this points at a host other than `api.anthropic.com`, matching its behavior on Bedrock, Vertex AI, and Foundry |95| `ANTHROPIC_BASE_URL` | Override the API endpoint to route requests through a proxy or gateway. When set to a non-first-party host, [MCP tool search](/en/mcp#scale-with-mcp-tool-search) is disabled by default. Set `ENABLE_TOOL_SEARCH=true` if your proxy forwards `tool_reference` blocks. {/* min-version: 2.1.196 */}As of v2.1.196, [Remote Control](/en/remote-control#requirements) is disabled when this points at a host other than `api.anthropic.com`, matching its behavior on Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry |
96| `ANTHROPIC_BEDROCK_BASE_URL` | Override the Bedrock endpoint URL. Use for custom Bedrock endpoints or when routing through an [LLM gateway](/en/llm-gateway). See [Amazon Bedrock](/en/amazon-bedrock) |96| `ANTHROPIC_BEDROCK_BASE_URL` | Override the Amazon Bedrock endpoint URL. Use for custom Amazon Bedrock endpoints or when routing through an [LLM gateway](/en/llm-gateway). See [Amazon Bedrock](/en/amazon-bedrock) |
97| `ANTHROPIC_BEDROCK_MANTLE_BASE_URL` | Override the Bedrock Mantle endpoint URL. See [Mantle endpoint](/en/amazon-bedrock#use-the-mantle-endpoint) |97| `ANTHROPIC_BEDROCK_MANTLE_BASE_URL` | Override the Amazon Bedrock Mantle endpoint URL. See [Mantle endpoint](/en/amazon-bedrock#use-the-mantle-endpoint) |
98| `ANTHROPIC_BEDROCK_SERVICE_TIER` | Bedrock [service tier](https://docs.aws.amazon.com/bedrock/latest/userguide/service-tiers-inference.html) (`default`, `flex`, or `priority`). Sent as the `X-Amzn-Bedrock-Service-Tier` header. See [Amazon Bedrock](/en/amazon-bedrock#service-tiers) |98| `ANTHROPIC_BEDROCK_SERVICE_TIER` | Amazon Bedrock [service tier](https://docs.aws.amazon.com/bedrock/latest/userguide/service-tiers-inference.html) (`default`, `flex`, or `priority`). Sent as the `X-Amzn-Bedrock-Service-Tier` header. See [Amazon Bedrock](/en/amazon-bedrock#service-tiers) |
99| `ANTHROPIC_BETAS` | Comma-separated list of additional `anthropic-beta` header values to include in API requests. Claude Code already sends the beta headers it needs; use this to opt into an [Anthropic API beta](https://platform.claude.com/docs/en/api/beta-headers) before Claude Code adds native support. Unlike the [`--betas` flag](/en/cli-reference#cli-flags), which requires API key authentication, this variable works with all auth methods including Claude.ai subscription |99| `ANTHROPIC_BETAS` | Comma-separated list of additional `anthropic-beta` header values to include in API requests. Claude Code already sends the beta headers it needs; use this to opt into an [Anthropic API beta](https://platform.claude.com/docs/en/api/beta-headers) before Claude Code adds native support. Unlike the [`--betas` flag](/en/cli-reference#cli-flags), which requires API key authentication, this variable works with all auth methods including Claude.ai subscription |
100| `ANTHROPIC_CUSTOM_HEADERS` | Custom headers to add to requests (`Name: Value` format, newline-separated for multiple headers) |100| `ANTHROPIC_CUSTOM_HEADERS` | Custom headers to add to requests (`Name: Value` format, newline-separated for multiple headers) |
101| `ANTHROPIC_CUSTOM_MODEL_OPTION` | Model ID to add as a custom entry in the `/model` picker. Use this to make a non-standard or gateway-specific model selectable without replacing built-in aliases. See [Model configuration](/en/model-config#add-a-custom-model-option) |101| `ANTHROPIC_CUSTOM_MODEL_OPTION` | Model ID to add as a custom entry in the `/model` picker. Use this to make a non-standard or gateway-specific model selectable without replacing built-in aliases. See [Model configuration](/en/model-config#add-a-custom-model-option) |
119| `ANTHROPIC_DEFAULT_SONNET_MODEL_NAME` | See [Model configuration](/en/model-config#customize-pinned-model-display-and-capabilities) |119| `ANTHROPIC_DEFAULT_SONNET_MODEL_NAME` | See [Model configuration](/en/model-config#customize-pinned-model-display-and-capabilities) |
120| `ANTHROPIC_DEFAULT_SONNET_MODEL_SUPPORTED_CAPABILITIES` | See [Model configuration](/en/model-config#customize-pinned-model-display-and-capabilities) |120| `ANTHROPIC_DEFAULT_SONNET_MODEL_SUPPORTED_CAPABILITIES` | See [Model configuration](/en/model-config#customize-pinned-model-display-and-capabilities) |
121| `ANTHROPIC_FOUNDRY_API_KEY` | API key for Microsoft Foundry authentication (see [Microsoft Foundry](/en/microsoft-foundry)) |121| `ANTHROPIC_FOUNDRY_API_KEY` | API key for Microsoft Foundry authentication (see [Microsoft Foundry](/en/microsoft-foundry)) |
122| `ANTHROPIC_FOUNDRY_BASE_URL` | Full base URL for the Foundry resource (for example, `https://my-resource.services.ai.azure.com/anthropic`). Alternative to `ANTHROPIC_FOUNDRY_RESOURCE` (see [Microsoft Foundry](/en/microsoft-foundry)) |122| `ANTHROPIC_FOUNDRY_BASE_URL` | Full base URL for the Microsoft Foundry resource (for example, `https://my-resource.services.ai.azure.com/anthropic`). Alternative to `ANTHROPIC_FOUNDRY_RESOURCE` (see [Microsoft Foundry](/en/microsoft-foundry)) |
123| `ANTHROPIC_FOUNDRY_RESOURCE` | Foundry resource name (for example, `my-resource`). Required if `ANTHROPIC_FOUNDRY_BASE_URL` is not set (see [Microsoft Foundry](/en/microsoft-foundry)) |123| `ANTHROPIC_FOUNDRY_RESOURCE` | Microsoft Foundry resource name (for example, `my-resource`). Required if `ANTHROPIC_FOUNDRY_BASE_URL` is not set (see [Microsoft Foundry](/en/microsoft-foundry)) |
124| `ANTHROPIC_MODEL` | Name of the model setting to use (see [Model Configuration](/en/model-config#environment-variables)) |124| `ANTHROPIC_MODEL` | Name of the model setting to use (see [Model Configuration](/en/model-config#environment-variables)) |
125| `ANTHROPIC_SMALL_FAST_MODEL` | \[DEPRECATED] Name of [Haiku-class model for background tasks](/en/costs) |125| `ANTHROPIC_SMALL_FAST_MODEL` | \[DEPRECATED] Name of [Haiku-class model for background tasks](/en/costs) |
126| `ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION` | Override AWS region for the Haiku-class model when using Bedrock or Bedrock Mantle. On Bedrock, this only takes effect when `ANTHROPIC_DEFAULT_HAIKU_MODEL` or the deprecated `ANTHROPIC_SMALL_FAST_MODEL` is also set, since Bedrock otherwise uses the primary model for background tasks |126| `ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION` | Override AWS region for the Haiku-class model when using Amazon Bedrock or Amazon Bedrock Mantle. On Amazon Bedrock, this only takes effect when `ANTHROPIC_DEFAULT_HAIKU_MODEL` or the deprecated `ANTHROPIC_SMALL_FAST_MODEL` is also set, since Amazon Bedrock otherwise uses the primary model for background tasks |
127| `ANTHROPIC_VERTEX_BASE_URL` | Override the Vertex AI endpoint URL. Use for custom Vertex endpoints or when routing through an [LLM gateway](/en/llm-gateway). See [Google Vertex AI](/en/google-vertex-ai) |127| `ANTHROPIC_VERTEX_BASE_URL` | Override Google Cloud's Agent Platform endpoint URL. Use for custom Google Cloud's Agent Platform endpoints or when routing through an [LLM gateway](/en/llm-gateway). See [Google Cloud's Agent Platform](/en/google-vertex-ai) |
128| `ANTHROPIC_VERTEX_PROJECT_ID` | GCP project ID for Vertex AI requests. Overridden by `GCLOUD_PROJECT`, `GOOGLE_CLOUD_PROJECT`, or the project in your `GOOGLE_APPLICATION_CREDENTIALS` credential file. See [Google Vertex AI](/en/google-vertex-ai) |128| `ANTHROPIC_VERTEX_PROJECT_ID` | GCP project ID for Google Cloud's Agent Platform requests. Overridden by `GCLOUD_PROJECT`, `GOOGLE_CLOUD_PROJECT`, or the project in your `GOOGLE_APPLICATION_CREDENTIALS` credential file. See [Google Cloud's Agent Platform](/en/google-vertex-ai) |
129| `ANTHROPIC_WORKSPACE_ID` | Workspace ID for [workload identity federation](https://platform.claude.com/docs/en/manage-claude/workload-identity-federation). Set this when your federation rule is scoped to more than one workspace so the token exchange knows which workspace to target |129| `ANTHROPIC_WORKSPACE_ID` | Workspace ID for [workload identity federation](https://platform.claude.com/docs/en/manage-claude/workload-identity-federation). Set this when your federation rule is scoped to more than one workspace so the token exchange knows which workspace to target |
130| `API_FORCE_IDLE_TIMEOUT` | {/* min-version: 2.1.169 */}Override the 5-minute idle timeout that aborts a streaming model response when no bytes arrive. Set to `0` to disable the timeout, for example when a slow [gateway](/en/llm-gateway) or local model pauses longer than 5 minutes between chunks. Set to `1` to keep the timeout on every provider. When unset, the timeout is inactive on direct Anthropic API and [Claude Platform on AWS](/en/claude-platform-on-aws) connections, where Claude Code's own byte-level stream watchdog runs, and active on every other provider, including [Vertex AI](/en/google-vertex-ai), [Foundry](/en/microsoft-foundry), [Mantle](/en/amazon-bedrock#use-the-mantle-endpoint), [Bedrock](/en/amazon-bedrock), and gateway connections, so a stalled stream aborts instead of hanging. As of v2.1.169 |130| `API_FORCE_IDLE_TIMEOUT` | {/* min-version: 2.1.169 */}Override the 5-minute idle timeout that aborts a streaming model response when no bytes arrive. Set to `0` to disable the timeout, for example when a slow [gateway](/en/llm-gateway) or local model pauses longer than 5 minutes between chunks. Set to `1` to keep the timeout on every provider. When unset, the timeout is inactive on direct Anthropic API and [Claude Platform on AWS](/en/claude-platform-on-aws) connections, where Claude Code's own byte-level stream watchdog runs, and active on every other provider, including [Google Cloud's Agent Platform](/en/google-vertex-ai), [Microsoft Foundry](/en/microsoft-foundry), [Mantle](/en/amazon-bedrock#use-the-mantle-endpoint), [Amazon Bedrock](/en/amazon-bedrock), and gateway connections, so a stalled stream aborts instead of hanging. As of v2.1.169 |
131| `API_TIMEOUT_MS` | Timeout for API requests in milliseconds (default: 600000, or 10 minutes; maximum: 2147483647). Increase this when requests time out on slow networks or when routing through a proxy. Values above the maximum overflow the underlying timer and cause requests to fail immediately |131| `API_TIMEOUT_MS` | Timeout for API requests in milliseconds (default: 600000, or 10 minutes; maximum: 2147483647). Increase this when requests time out on slow networks or when routing through a proxy. Values above the maximum overflow the underlying timer and cause requests to fail immediately |
132| `AWS_BEARER_TOKEN_BEDROCK` | Bedrock API key for authentication (see [Bedrock API keys](https://aws.amazon.com/blogs/machine-learning/accelerate-ai-development-with-amazon-bedrock-api-keys/)) |132| `AWS_BEARER_TOKEN_BEDROCK` | Amazon Bedrock API key for authentication (see [Amazon Bedrock API keys](https://aws.amazon.com/blogs/machine-learning/accelerate-ai-development-with-amazon-bedrock-api-keys/)) |
133| `BASH_DEFAULT_TIMEOUT_MS` | Default timeout for long-running bash commands (default: 120000, or 2 minutes) |133| `BASH_DEFAULT_TIMEOUT_MS` | Default timeout for long-running bash commands (default: 120000, or 2 minutes) |
134| `BASH_MAX_OUTPUT_LENGTH` | Maximum number of characters in bash outputs before the full output is saved to a file and Claude receives the path plus a short preview. See [Bash tool behavior](/en/tools-reference#bash-tool-behavior) |134| `BASH_MAX_OUTPUT_LENGTH` | Maximum number of characters in bash outputs before the full output is saved to a file and Claude receives the path plus a short preview. See [Bash tool behavior](/en/tools-reference#bash-tool-behavior) |
135| `BASH_MAX_TIMEOUT_MS` | Maximum timeout the model can set for long-running bash commands (default: 600000, or 10 minutes) |135| `BASH_MAX_TIMEOUT_MS` | Maximum timeout the model can set for long-running bash commands (default: 600000, or 10 minutes) |
136| `CCR_FORCE_BUNDLE` | Set to `1` to force [`claude --remote`](/en/claude-code-on-the-web#send-local-repositories-without-github) to bundle and upload your local repository even when GitHub access is available |136| `CCR_FORCE_BUNDLE` | Set to `1` to force [`claude --cloud`](/en/claude-code-on-the-web#send-local-repositories-without-github) to bundle and upload your local repository even when GitHub access is available |
137| `CLAUDECODE` | Set to `1` in subprocesses Claude Code spawns (Bash and PowerShell tools, tmux sessions, [hook](/en/hooks) commands, [status line](/en/statusline) commands, stdio [MCP server](/en/mcp) subprocesses). IDE extensions also set this in their integrated terminals. Use to detect when a script is running inside a subprocess spawned by Claude Code. To check whether the current process was spawned directly by a tool call or hook, rather than inside a stdio MCP server that Claude Code started, use `CLAUDE_CODE_CHILD_SESSION` instead |137| `CLAUDECODE` | Set to `1` in subprocesses Claude Code spawns (Bash and PowerShell tools, tmux sessions, [hook](/en/hooks) commands, [status line](/en/statusline) commands, stdio [MCP server](/en/mcp) subprocesses). IDE extensions also set this in their integrated terminals. Use to detect when a script is running inside a subprocess spawned by Claude Code. To check whether the current process was spawned directly by a tool call or hook, rather than inside a stdio MCP server that Claude Code started, use `CLAUDE_CODE_CHILD_SESSION` instead |
138| `CLAUDE_AFK_COUNTDOWN_MS` | {/* min-version: 2.1.198 */}How many milliseconds before auto-continue the on-screen countdown appears on an unanswered `AskUserQuestion` dialog. Default `20000` (20 seconds). See `CLAUDE_AFK_TIMEOUT_MS`. Requires Claude Code v2.1.198 or later |138| `CLAUDE_AFK_COUNTDOWN_MS` | {/* min-version: 2.1.198 */}How many milliseconds before auto-continue the on-screen countdown appears on an unanswered [`AskUserQuestion`](/en/tools-reference) dialog. Default `20000` (20 seconds), capped at the auto-continue timeout. Has no effect unless auto-continue is on; see the [`askUserQuestionTimeout`](/en/settings#available-settings) setting and `CLAUDE_AFK_TIMEOUT_MS`. Requires Claude Code v2.1.198 or later |
139| `CLAUDE_AFK_TIMEOUT_MS` | {/* min-version: 2.1.198 */}How many milliseconds of idle time before an unanswered [`AskUserQuestion`](/en/tools-reference) dialog auto-continues without you. Default `60000` (60 seconds). To keep questions open while you're away, set a large value like `86400000` (24 hours). Setting `0` doesn't turn the timeout off; it closes the dialog immediately. Requires Claude Code v2.1.198 or later |139| `CLAUDE_AFK_TIMEOUT_MS` | {/* min-version: 2.1.198 */}How many milliseconds of idle time before an unanswered [`AskUserQuestion`](/en/tools-reference) dialog auto-continues without you. {/* min-version: 2.1.200 */}Auto-continue is off by default; opt in with the [`askUserQuestionTimeout`](/en/settings#available-settings) setting. This variable is an override for demos and automated tests: when set, it takes precedence over that setting and turns auto-continue on even when the setting is unset or `never`. Setting `0` doesn't turn the timeout off; it closes the dialog immediately. In v2.1.198 and v2.1.199, auto-continue was on by default with a `60000` (60 seconds) timeout. Requires Claude Code v2.1.198 or later |
140| `CLAUDE_AGENT_SDK_DISABLE_BUILTIN_AGENTS` | Set to `1` to disable all built-in [subagent](/en/sub-agents) types such as Explore and Plan. Only applies in non-interactive mode (the `-p` flag). Useful for SDK users who want a blank slate |140| `CLAUDE_AGENT_SDK_DISABLE_BUILTIN_AGENTS` | Set to `1` to disable all built-in [subagent](/en/sub-agents) types such as Explore and Plan. Only applies in non-interactive mode (the `-p` flag). Useful for SDK users who want a blank slate |
141| `CLAUDE_AGENT_SDK_MCP_NO_PREFIX` | Set to `1` to skip the `mcp__<server>__` prefix on tool names from SDK-created MCP servers. Tools use their original names. SDK usage only |141| `CLAUDE_AGENT_SDK_MCP_NO_PREFIX` | Set to `1` to skip the `mcp__<server>__` prefix on tool names from SDK-created MCP servers. Tools use their original names. SDK usage only |
142| `CLAUDE_ASYNC_AGENT_STALL_TIMEOUT_MS` | Stall timeout in milliseconds for background subagents. Default `600000` (10 minutes). The timer resets on each streaming progress event; if no progress arrives within the window, the subagent is aborted and the task is marked failed, surfacing any partial result to the parent |142| `CLAUDE_ASYNC_AGENT_STALL_TIMEOUT_MS` | Stall timeout in milliseconds for background subagents. Default `600000` (10 minutes). The timer resets on each streaming progress event; if no progress arrives within the window, the subagent is aborted and the task is marked failed, surfacing any partial result to the parent |
183| `CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY` | Set to `1` to disable the "How is Claude doing?" session quality surveys. Surveys are also disabled when `DISABLE_TELEMETRY`, `DO_NOT_TRACK`, or `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` is set, unless `CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL` opts back in. To set a sample rate instead of disabling outright, use the [`feedbackSurveyRate`](/en/settings#available-settings) setting. See [Session quality surveys](/en/data-usage#session-quality-surveys) |183| `CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY` | Set to `1` to disable the "How is Claude doing?" session quality surveys. Surveys are also disabled when `DISABLE_TELEMETRY`, `DO_NOT_TRACK`, or `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` is set, unless `CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL` opts back in. To set a sample rate instead of disabling outright, use the [`feedbackSurveyRate`](/en/settings#available-settings) setting. See [Session quality surveys](/en/data-usage#session-quality-surveys) |
184| `CLAUDE_CODE_DISABLE_FILE_CHECKPOINTING` | Set to `1` to disable file [checkpointing](/en/checkpointing). The `/rewind` command will not be able to restore code changes |184| `CLAUDE_CODE_DISABLE_FILE_CHECKPOINTING` | Set to `1` to disable file [checkpointing](/en/checkpointing). The `/rewind` command will not be able to restore code changes |
185| `CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS` | Set to `1` to remove built-in commit and PR workflow instructions and the git status snapshot from Claude's system prompt. Useful when using your own git workflow skills. Takes precedence over the [`includeGitInstructions`](/en/settings#available-settings) setting when set |185| `CLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS` | Set to `1` to remove built-in commit and PR workflow instructions and the git status snapshot from Claude's system prompt. Useful when using your own git workflow skills. Takes precedence over the [`includeGitInstructions`](/en/settings#available-settings) setting when set |
186| `CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP` | Set to `1` to prevent automatic remapping of Opus 4.0 and 4.1 to the current Opus version on the Anthropic API. Use when you intentionally want to pin an older model. The remap does not run on Bedrock, Vertex, or Foundry |186| `CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP` | Set to `1` to prevent automatic remapping of Opus 4.0 and 4.1 to the current Opus version on the Anthropic API. Use when you intentionally want to pin an older model. The remap does not run on Amazon Bedrock, Google Cloud's Agent Platform, or Microsoft Foundry |
187| `CLAUDE_CODE_DISABLE_MOUSE` | Set to `1` to disable mouse tracking in [fullscreen rendering](/en/fullscreen). Keyboard scrolling with `PgUp` and `PgDn` still works. Use this to keep your terminal's native copy-on-select behavior |187| `CLAUDE_CODE_DISABLE_MOUSE` | Set to `1` to disable mouse tracking in [fullscreen rendering](/en/fullscreen). Keyboard scrolling with `PgUp` and `PgDn` still works. Use this to keep your terminal's native copy-on-select behavior |
188| `CLAUDE_CODE_DISABLE_MOUSE_CLICKS` | {/* min-version: 2.1.195 */}Set to `1` to disable click, drag, and hover handling in [fullscreen rendering](/en/fullscreen) while keeping mouse-wheel scrolling. Use this when you want wheel scroll to work inside Claude Code but don't want clicks to position the cursor, expand tool output, or open links. `CLAUDE_CODE_DISABLE_MOUSE` takes precedence when both are set. Requires Claude Code v2.1.195 or later |188| `CLAUDE_CODE_DISABLE_MOUSE_CLICKS` | {/* min-version: 2.1.195 */}Set to `1` to disable click, drag, and hover handling in [fullscreen rendering](/en/fullscreen) while keeping mouse-wheel scrolling. Use this when you want wheel scroll to work inside Claude Code but don't want clicks to position the cursor, expand tool output, or open links. `CLAUDE_CODE_DISABLE_MOUSE` takes precedence when both are set. Requires Claude Code v2.1.195 or later |
189| `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` | Equivalent of setting `DISABLE_AUTOUPDATER`, `DISABLE_FEEDBACK_COMMAND`, `DISABLE_ERROR_REPORTING`, and `DISABLE_TELEMETRY` |189| `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` | Equivalent of setting `DISABLE_AUTOUPDATER`, `DISABLE_FEEDBACK_COMMAND`, `DISABLE_ERROR_REPORTING`, and `DISABLE_TELEMETRY` |
196| `CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL` | Set to `1` to disable virtual scrolling in [fullscreen rendering](/en/fullscreen) and render every message in the transcript. Use this if scrolling in fullscreen mode shows blank regions where messages should appear |196| `CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL` | Set to `1` to disable virtual scrolling in [fullscreen rendering](/en/fullscreen) and render every message in the transcript. Use this if scrolling in fullscreen mode shows blank regions where messages should appear |
197| `CLAUDE_CODE_DISABLE_WORKFLOWS` | Set to `1` to disable [workflows](/en/workflows#turn-workflows-off). Equivalent to the [`disableWorkflows`](/en/settings#available-settings) setting |197| `CLAUDE_CODE_DISABLE_WORKFLOWS` | Set to `1` to disable [workflows](/en/workflows#turn-workflows-off). Equivalent to the [`disableWorkflows`](/en/settings#available-settings) setting |
198| `CLAUDE_CODE_EFFORT_LEVEL` | Set the effort level for supported models. Values: `low`, `medium`, `high`, `xhigh`, `max`, or `auto` to use the model default. Available levels depend on the model. Takes precedence over `/effort` and the `effortLevel` setting. See [Adjust effort level](/en/model-config#adjust-effort-level) |198| `CLAUDE_CODE_EFFORT_LEVEL` | Set the effort level for supported models. Values: `low`, `medium`, `high`, `xhigh`, `max`, or `auto` to use the model default. Available levels depend on the model. Takes precedence over `/effort` and the `effortLevel` setting. See [Adjust effort level](/en/model-config#adjust-effort-level) |
199| `CLAUDE_CODE_ENABLE_AUTO_MODE` | {/* min-version: 2.1.158 */}Set to `1` to make [auto mode](/en/permission-modes#eliminate-prompts-with-auto-mode) available on Amazon Bedrock, Google Cloud Vertex AI, Microsoft Foundry, and signed-in [Claude apps gateway](/en/claude-apps-gateway) sessions. Requires Claude Code v2.1.158 or later. Has no effect on the Anthropic API, where auto mode is available by default. See [Enable auto mode on Bedrock, Vertex AI, or Foundry](/en/permission-modes#enable-auto-mode-on-bedrock-vertex-ai-or-foundry) |199| `CLAUDE_CODE_ENABLE_AUTO_MODE` | {/* min-version: 2.1.158 */}Set to `1` to make [auto mode](/en/permission-modes#eliminate-prompts-with-auto-mode) available on Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in [Claude apps gateway](/en/claude-apps-gateway) sessions. Requires Claude Code v2.1.158 or later. Has no effect on the Anthropic API, where auto mode is available by default. See [Enable auto mode on Amazon Bedrock, Google Cloud's Agent Platform, or Microsoft Foundry](/en/permission-modes#enable-auto-mode-on-bedrock-agent-platform-or-foundry) |
200| `CLAUDE_CODE_ENABLE_AWAY_SUMMARY` | Override [session recap](/en/interactive-mode#session-recap) availability. Set to `0` to force recaps off regardless of the `/config` toggle. Set to `1` to force recaps on when [`awaySummaryEnabled`](/en/settings#available-settings) is `false`. Takes precedence over the setting and `/config` toggle |200| `CLAUDE_CODE_ENABLE_AWAY_SUMMARY` | Override [session recap](/en/interactive-mode#session-recap) availability. Set to `0` to force recaps off regardless of the `/config` toggle. Set to `1` to force recaps on when [`awaySummaryEnabled`](/en/settings#available-settings) is `false`. Takes precedence over the setting and `/config` toggle |
201| `CLAUDE_CODE_ENABLE_BACKGROUND_PLUGIN_REFRESH` | Set to `1` to refresh plugin state at turn boundaries in [non-interactive mode](/en/headless) after a background install completes. Off by default because the refresh changes the system prompt mid-session, which invalidates [prompt caching](/en/prompt-caching) for that turn |201| `CLAUDE_CODE_ENABLE_BACKGROUND_PLUGIN_REFRESH` | Set to `1` to refresh plugin state at turn boundaries in [non-interactive mode](/en/headless) after a background install completes. Off by default because the refresh changes the system prompt mid-session, which invalidates [prompt caching](/en/prompt-caching) for that turn |
202| `CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL` | Set to `1` to route the "How is Claude doing?" session quality survey to your own [OpenTelemetry collector](/en/monitoring-usage) when Anthropic-bound nonessential traffic is blocked. Survey ratings are emitted only as OTEL events to your configured collector. No survey data is sent to Anthropic in this mode. Applies when `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC`, `DISABLE_TELEMETRY`, or `DO_NOT_TRACK` is set, and has no effect otherwise. `CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY` and the organization product feedback policy take precedence |202| `CLAUDE_CODE_ENABLE_FEEDBACK_SURVEY_FOR_OTEL` | Set to `1` to route the "How is Claude doing?" session quality survey to your own [OpenTelemetry collector](/en/monitoring-usage) when Anthropic-bound nonessential traffic is blocked. Survey ratings are emitted only as OTEL events to your configured collector. No survey data is sent to Anthropic in this mode. Applies when `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC`, `DISABLE_TELEMETRY`, or `DO_NOT_TRACK` is set, and has no effect otherwise. `CLAUDE_CODE_DISABLE_FEEDBACK_SURVEY` and the organization product feedback policy take precedence |
203| `CLAUDE_CODE_ENABLE_FINE_GRAINED_TOOL_STREAMING` | Controls whether tool call inputs stream from the API as Claude generates them. With this off, a large tool input such as a long file write arrives only after Claude finishes generating it, which can look like it's hanging. Enabled by default on the Anthropic API. On Bedrock and Vertex, enabled per model where the deployed container supports it. Set to `0` to opt out. Set to `1` to force on when routing through a proxy via `ANTHROPIC_BASE_URL`, `ANTHROPIC_VERTEX_BASE_URL`, or `ANTHROPIC_BEDROCK_BASE_URL`. Off by default on Foundry and [gateway](/en/llm-gateway) connections |203| `CLAUDE_CODE_ENABLE_FINE_GRAINED_TOOL_STREAMING` | Controls whether tool call inputs stream from the API as Claude generates them. With this off, a large tool input such as a long file write arrives only after Claude finishes generating it, which can look like it's hanging. Enabled by default on the Anthropic API. On Amazon Bedrock and Google Cloud's Agent Platform, enabled per model where the deployed container supports it. Set to `0` to opt out. Set to `1` to force on when routing through a proxy via `ANTHROPIC_BASE_URL`, `ANTHROPIC_VERTEX_BASE_URL`, or `ANTHROPIC_BEDROCK_BASE_URL`. Off by default on Microsoft Foundry and [gateway](/en/llm-gateway) connections |
204| `CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY` | Set to `1` to populate the `/model` picker from your gateway's `/v1/models` endpoint when `ANTHROPIC_BASE_URL` points at an Anthropic-compatible gateway such as LiteLLM, Kong, or an internal proxy. Off by default because gateways backed by a shared API key would otherwise show every user every model the key can access. Discovered models are still filtered by an [`availableModels`](/en/settings#available-settings) allowlist the session receives; deliver the list through [MDM or a managed settings file](/en/settings#settings-files), since [server-managed delivery is not available on gateway configurations](/en/server-managed-settings#platform-availability) |204| `CLAUDE_CODE_ENABLE_GATEWAY_MODEL_DISCOVERY` | Set to `1` to populate the `/model` picker from your gateway's `/v1/models` endpoint when `ANTHROPIC_BASE_URL` points at an Anthropic-compatible gateway such as LiteLLM, Kong, or an internal proxy. Off by default because gateways backed by a shared API key would otherwise show every user every model the key can access. Discovered models are still filtered by an [`availableModels`](/en/settings#available-settings) allowlist the session receives; deliver the list through [MDM or a managed settings file](/en/settings#settings-files), since [server-managed delivery is not available on gateway configurations](/en/server-managed-settings#platform-availability) |
205| `CLAUDE_CODE_ENABLE_OPUS_4_7_FAST_MODE` | {/* max-version: 2.1.141 */}Removed in v2.1.142, when the [fast mode](/en/fast-mode) default moved from Opus 4.6 to Opus 4.7 |205| `CLAUDE_CODE_ENABLE_OPUS_4_7_FAST_MODE` | {/* max-version: 2.1.141 */}Removed in v2.1.142, when the [fast mode](/en/fast-mode) default moved from Opus 4.6 to Opus 4.7 |
206| `CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION` | Set to `false` to disable prompt suggestions (the "Prompt suggestions" toggle in `/config`). These are the grayed-out predictions that appear in your prompt input after Claude responds. See [Prompt suggestions](/en/interactive-mode#prompt-suggestions) |206| `CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION` | Set to `false` to disable prompt suggestions (the "Prompt suggestions" toggle in `/config`). These are the grayed-out predictions that appear in your prompt input after Claude responds. See [Prompt suggestions](/en/interactive-mode#prompt-suggestions) |
250| `CLAUDE_CODE_POWERSHELL_RESPECT_EXECUTION_POLICY` | Set to `1` to stop Claude Code from passing `-ExecutionPolicy Bypass` when spawning PowerShell for tool calls, hooks, and status line commands, and respect the machine's effective execution policy instead. By default Claude Code bypasses execution policy at process scope so `.ps1` scripts and module imports work on default-Restricted Windows installs. Process-scope bypass never overrides Group Policy `MachinePolicy` or `UserPolicy` regardless of this setting |250| `CLAUDE_CODE_POWERSHELL_RESPECT_EXECUTION_POLICY` | Set to `1` to stop Claude Code from passing `-ExecutionPolicy Bypass` when spawning PowerShell for tool calls, hooks, and status line commands, and respect the machine's effective execution policy instead. By default Claude Code bypasses execution policy at process scope so `.ps1` scripts and module imports work on default-Restricted Windows installs. Process-scope bypass never overrides Group Policy `MachinePolicy` or `UserPolicy` regardless of this setting |
251| `CLAUDE_CODE_PRINT_BG_WAIT_CEILING_MS` | {/* min-version: 2.1.182 */}Maximum time in milliseconds that [non-interactive mode](/en/headless#background-tasks-at-exit) with the `-p` flag waits after the final turn for background subagents and workflows whose result is part of the output. Default: `600000`, or 10 minutes. When the cap is exceeded, remaining background tasks are terminated and the process exits. Set to `0` to wait indefinitely. This cap is separate from the five-second grace period that applies to plain background shells |251| `CLAUDE_CODE_PRINT_BG_WAIT_CEILING_MS` | {/* min-version: 2.1.182 */}Maximum time in milliseconds that [non-interactive mode](/en/headless#background-tasks-at-exit) with the `-p` flag waits after the final turn for background subagents and workflows whose result is part of the output. Default: `600000`, or 10 minutes. When the cap is exceeded, remaining background tasks are terminated and the process exits. Set to `0` to wait indefinitely. This cap is separate from the five-second grace period that applies to plain background shells |
252| `CLAUDE_CODE_PROPAGATE_TRACEPARENT` | {/* min-version: 2.1.152 */}Set to `1` to propagate W3C trace context when `ANTHROPIC_BASE_URL` points at a custom proxy. Propagation covers the `traceparent` header on model and HTTP MCP requests and the `TRACEPARENT` environment variable for Bash, PowerShell, and hook subprocesses. By default, propagation is enabled only when connected directly to the Anthropic API. Added in v2.1.152. See [Traces (beta)](/en/monitoring-usage#traces-beta) |252| `CLAUDE_CODE_PROPAGATE_TRACEPARENT` | {/* min-version: 2.1.152 */}Set to `1` to propagate W3C trace context when `ANTHROPIC_BASE_URL` points at a custom proxy. Propagation covers the `traceparent` header on model and HTTP MCP requests and the `TRACEPARENT` environment variable for Bash, PowerShell, and hook subprocesses. By default, propagation is enabled only when connected directly to the Anthropic API. Added in v2.1.152. See [Traces (beta)](/en/monitoring-usage#traces-beta) |
253| `CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST` | Set by host platforms that embed Claude Code and manage model provider routing on its behalf. When set, provider-selection, endpoint, and authentication variables such as `CLAUDE_CODE_USE_BEDROCK`, `ANTHROPIC_BASE_URL`, and `ANTHROPIC_API_KEY` in settings files are ignored so user settings cannot override the host's routing. The automatic telemetry opt-out for Bedrock, Vertex, and Foundry is also skipped, so telemetry follows the standard `DISABLE_TELEMETRY` opt-out. See [Default behaviors by API provider](/en/data-usage#default-behaviors-by-api-provider) |253| `CLAUDE_CODE_PROVIDER_MANAGED_BY_HOST` | Set by host platforms that embed Claude Code and manage model provider routing on its behalf. When set, provider-selection, endpoint, and authentication variables such as `CLAUDE_CODE_USE_BEDROCK`, `ANTHROPIC_BASE_URL`, and `ANTHROPIC_API_KEY` in settings files are ignored so user settings cannot override the host's routing. The automatic telemetry opt-out for Amazon Bedrock, Google Cloud's Agent Platform, and Microsoft Foundry is also skipped, so telemetry follows the standard `DISABLE_TELEMETRY` opt-out. See [Default behaviors by API provider](/en/data-usage#default-behaviors-by-api-provider) |
254| `CLAUDE_CODE_PROXY_RESOLVES_HOSTS` | Set to `1` to allow the proxy to perform DNS resolution instead of the caller. Opt-in for environments where the proxy should handle hostname resolution |254| `CLAUDE_CODE_PROXY_RESOLVES_HOSTS` | Set to `1` to allow the proxy to perform DNS resolution instead of the caller. Opt-in for environments where the proxy should handle hostname resolution |
255| `CLAUDE_CODE_REMOTE` | Set automatically to `true` when Claude Code is running as a [cloud session](/en/claude-code-on-the-web). Read this from a hook or setup script to detect whether you are in a cloud environment |255| `CLAUDE_CODE_REMOTE` | Set automatically to `true` when Claude Code is running as a [cloud session](/en/claude-code-on-the-web). Read this from a hook or setup script to detect whether you are in a cloud environment |
256| `CLAUDE_CODE_REMOTE_SESSION_ID` | Set automatically in [cloud sessions](/en/claude-code-on-the-web) to the current session's ID. Read this to construct a link back to the session transcript. See [Link output back to the session](/en/claude-code-on-the-web#link-output-back-to-the-session) |256| `CLAUDE_CODE_REMOTE_SESSION_ID` | Set automatically in [cloud sessions](/en/claude-code-on-the-web) to the current session's ID. Read this to construct a link back to the session transcript. See [Link output back to the session](/en/claude-code-on-the-web#link-output-back-to-the-session) |
267| `CLAUDE_CODE_SIMPLE` | Set to `1` to run with a minimal system prompt and only the Bash, file read, and file edit tools. MCP tools from `--mcp-config` are still available. Disables auto-discovery of hooks, skills, plugins, MCP servers, auto memory, and CLAUDE.md. OAuth tokens and keychain credentials are not read, so Anthropic authentication must come from `ANTHROPIC_API_KEY` or an `apiKeyHelper` in `--settings`. Equivalent to passing [`--bare`](/en/headless#start-faster-with-bare-mode) |267| `CLAUDE_CODE_SIMPLE` | Set to `1` to run with a minimal system prompt and only the Bash, file read, and file edit tools. MCP tools from `--mcp-config` are still available. Disables auto-discovery of hooks, skills, plugins, MCP servers, auto memory, and CLAUDE.md. OAuth tokens and keychain credentials are not read, so Anthropic authentication must come from `ANTHROPIC_API_KEY` or an `apiKeyHelper` in `--settings`. Equivalent to passing [`--bare`](/en/headless#start-faster-with-bare-mode) |
268| `CLAUDE_CODE_SIMPLE_SYSTEM_PROMPT` | Set to `1` to use a shorter system prompt and abbreviated tool descriptions on any model. Set to `0`, `false`, `no`, or `off` to opt out even on models where the experiment or server configuration would otherwise enable it. The full tool set, hooks, MCP servers, and CLAUDE.md discovery remain enabled |268| `CLAUDE_CODE_SIMPLE_SYSTEM_PROMPT` | Set to `1` to use a shorter system prompt and abbreviated tool descriptions on any model. Set to `0`, `false`, `no`, or `off` to opt out even on models where the experiment or server configuration would otherwise enable it. The full tool set, hooks, MCP servers, and CLAUDE.md discovery remain enabled |
269| `CLAUDE_CODE_SKIP_ANTHROPIC_AWS_AUTH` | Skip client-side authentication for [Claude Platform on AWS](/en/claude-platform-on-aws), for gateways that sign requests themselves |269| `CLAUDE_CODE_SKIP_ANTHROPIC_AWS_AUTH` | Skip client-side authentication for [Claude Platform on AWS](/en/claude-platform-on-aws), for gateways that sign requests themselves |
270| `CLAUDE_CODE_SKIP_BEDROCK_AUTH` | Skip AWS authentication for Bedrock (for example, when using an LLM gateway) |270| `CLAUDE_CODE_SKIP_BEDROCK_AUTH` | Skip AWS authentication for Amazon Bedrock (for example, when using an LLM gateway) |
271| `CLAUDE_CODE_SKIP_FOUNDRY_AUTH` | Skip Azure authentication for Microsoft Foundry. For a gateway, set the credential in `ANTHROPIC_FOUNDRY_API_KEY` instead; without an API key this variable leaves the Foundry client unable to send requests |271| `CLAUDE_CODE_SKIP_FOUNDRY_AUTH` | Skip Azure authentication for Microsoft Foundry. For a gateway, set the credential in `ANTHROPIC_FOUNDRY_API_KEY` instead; without an API key this variable leaves the Microsoft Foundry client unable to send requests |
272| `CLAUDE_CODE_SKIP_MANTLE_AUTH` | Skip AWS authentication for Bedrock Mantle (for example, when using an LLM gateway) |272| `CLAUDE_CODE_SKIP_MANTLE_AUTH` | Skip AWS authentication for Amazon Bedrock Mantle (for example, when using an LLM gateway) |
273| `CLAUDE_CODE_SKIP_PROMPT_HISTORY` | Set to `1` to skip writing prompt history and session transcripts to disk. Sessions started with this variable set do not appear in `--resume`, `--continue`, or up-arrow history. Useful for ephemeral scripted sessions |273| `CLAUDE_CODE_SKIP_PROMPT_HISTORY` | Set to `1` to skip writing prompt history and session transcripts to disk. Sessions started with this variable set do not appear in `--resume`, `--continue`, or up-arrow history. Useful for ephemeral scripted sessions |
274| `CLAUDE_CODE_SKIP_VERTEX_AUTH` | Skip Google authentication for Vertex (for example, when using an LLM gateway) |274| `CLAUDE_CODE_SKIP_VERTEX_AUTH` | Skip Google authentication for Google Cloud's Agent Platform (for example, when using an LLM gateway) |
275| `CLAUDE_CODE_STOP_HOOK_BLOCK_CAP` | Maximum number of consecutive times a [Stop](/en/hooks#stop) or [SubagentStop](/en/hooks#subagentstop) hook may block the turn from ending before Claude Code overrides it and ends the turn anyway (default: 8). Set to `0` to disable the cap. Raise this if your hook legitimately needs more iterations to resolve |275| `CLAUDE_CODE_STOP_HOOK_BLOCK_CAP` | Maximum number of consecutive times a [Stop](/en/hooks#stop) or [SubagentStop](/en/hooks#subagentstop) hook may block the turn from ending before Claude Code overrides it and ends the turn anyway (default: 8). Set to `0` to disable the cap. Raise this if your hook legitimately needs more iterations to resolve |
276| `CLAUDE_CODE_SUBAGENT_MODEL` | See [Model configuration](/en/model-config). {/* min-version: 2.1.196 */}As of v2.1.196, setting it to `inherit` is the same as leaving it unset; earlier versions treated `inherit` as an override that forced every subagent onto the main conversation's model |276| `CLAUDE_CODE_SUBAGENT_MODEL` | See [Model configuration](/en/model-config). {/* min-version: 2.1.196 */}As of v2.1.196, setting it to `inherit` is the same as leaving it unset; earlier versions treated `inherit` as an override that forced every subagent onto the main conversation's model |
277| `CLAUDE_CODE_SUBPROCESS_ENV_SCRUB` | Set to `1` to strip Anthropic and cloud provider credentials from subprocess environments (Bash tool, hooks, MCP stdio servers). The parent Claude process keeps these credentials for API calls, but child processes cannot read them, reducing exposure to prompt injection attacks that attempt to exfiltrate secrets via shell expansion. On Linux, this also runs Bash subprocesses in an isolated PID namespace so they cannot read host process environments via `/proc`; as a side effect, `ps`, `pgrep`, and `kill` cannot see or signal host processes. `claude-code-action` sets this automatically when `allowed_non_write_users` is configured |277| `CLAUDE_CODE_SUBPROCESS_ENV_SCRUB` | Set to `1` to strip Anthropic and cloud provider credentials from subprocess environments (Bash tool, hooks, MCP stdio servers). The parent Claude process keeps these credentials for API calls, but child processes cannot read them, reducing exposure to prompt injection attacks that attempt to exfiltrate secrets via shell expansion. On Linux, this also runs Bash subprocesses in an isolated PID namespace so they cannot read host process environments via `/proc`; as a side effect, `ps`, `pgrep`, and `kill` cannot see or signal host processes. `claude-code-action` sets this automatically when `allowed_non_write_users` is configured |
286| `CLAUDE_CODE_TMPDIR` | Override the temp directory used for internal temp files. Claude Code appends `/claude-{uid}/` on Unix or `/claude/` on Windows to this path. Default: `/tmp` on macOS, `os.tmpdir()` on Linux and Windows. {/* min-version: 2.1.161 */}As of v2.1.161, on macOS and Linux, [sandboxed](/en/sandboxing) Bash subprocesses receive a short fallback `$TMPDIR` under the system default when your override is a long path, since some tools fail when temp paths get too long. Unsandboxed Bash commands inherit your shell's `$TMPDIR` unchanged. Claude Code's own temp files always use your override |286| `CLAUDE_CODE_TMPDIR` | Override the temp directory used for internal temp files. Claude Code appends `/claude-{uid}/` on Unix or `/claude/` on Windows to this path. Default: `/tmp` on macOS, `os.tmpdir()` on Linux and Windows. {/* min-version: 2.1.161 */}As of v2.1.161, on macOS and Linux, [sandboxed](/en/sandboxing) Bash subprocesses receive a short fallback `$TMPDIR` under the system default when your override is a long path, since some tools fail when temp paths get too long. Unsandboxed Bash commands inherit your shell's `$TMPDIR` unchanged. Claude Code's own temp files always use your override |
287| `CLAUDE_CODE_TMUX_TRUECOLOR` | Set to `1` to allow 24-bit truecolor output inside tmux. By default, Claude Code clamps to 256 colors when `$TMUX` is set because tmux does not pass through truecolor escape sequences unless configured to. Set this after adding `set -ga terminal-overrides ',*:Tc'` to your `~/.tmux.conf`. See [Terminal configuration](/en/terminal-config) for other tmux settings |287| `CLAUDE_CODE_TMUX_TRUECOLOR` | Set to `1` to allow 24-bit truecolor output inside tmux. By default, Claude Code clamps to 256 colors when `$TMUX` is set because tmux does not pass through truecolor escape sequences unless configured to. Set this after adding `set -ga terminal-overrides ',*:Tc'` to your `~/.tmux.conf`. See [Terminal configuration](/en/terminal-config) for other tmux settings |
288| `CLAUDE_CODE_USE_ANTHROPIC_AWS` | Use [Claude Platform on AWS](/en/claude-platform-on-aws) |288| `CLAUDE_CODE_USE_ANTHROPIC_AWS` | Use [Claude Platform on AWS](/en/claude-platform-on-aws) |
289| `CLAUDE_CODE_USE_BEDROCK` | Use [Bedrock](/en/amazon-bedrock) |289| `CLAUDE_CODE_USE_BEDROCK` | Use [Amazon Bedrock](/en/amazon-bedrock) |
290| `CLAUDE_CODE_USE_FOUNDRY` | Use [Microsoft Foundry](/en/microsoft-foundry) |290| `CLAUDE_CODE_USE_FOUNDRY` | Use [Microsoft Foundry](/en/microsoft-foundry) |
291| `CLAUDE_CODE_USE_MANTLE` | Use the Bedrock [Mantle endpoint](/en/amazon-bedrock#use-the-mantle-endpoint) |291| `CLAUDE_CODE_USE_MANTLE` | Use the Amazon Bedrock [Mantle endpoint](/en/amazon-bedrock#use-the-mantle-endpoint) |
292| `CLAUDE_CODE_USE_NATIVE_FILE_SEARCH` | Set to `1` to discover custom commands, subagents, and output styles using Node.js file APIs instead of ripgrep. Set this if the bundled ripgrep binary is unavailable or blocked in your environment. Does not affect the Grep or file search tools |292| `CLAUDE_CODE_USE_NATIVE_FILE_SEARCH` | Set to `1` to discover custom commands, subagents, and output styles using Node.js file APIs instead of ripgrep. Set this if the bundled ripgrep binary is unavailable or blocked in your environment. Does not affect the Grep or file search tools |
293| `CLAUDE_CODE_USE_POWERSHELL_TOOL` | Controls the PowerShell tool. On Windows without Git Bash, the tool is enabled automatically; set to `0` to disable it. On Windows with Git Bash installed, the tool is rolling out progressively: set to `1` to opt in or `0` to opt out. On Linux, macOS, and WSL, set to `1` to enable it, which requires `pwsh` on your `PATH`. When enabled on Windows, Claude can run PowerShell commands natively instead of routing through Git Bash. See [PowerShell tool](/en/tools-reference#powershell-tool) |293| `CLAUDE_CODE_USE_POWERSHELL_TOOL` | Controls the PowerShell tool. On Windows without Git Bash, the tool is enabled automatically; set to `0` to disable it. On Windows with Git Bash installed, the tool is rolling out progressively: set to `1` to opt in or `0` to opt out. On Linux, macOS, and WSL, set to `1` to enable it, which requires `pwsh` on your `PATH`. When enabled on Windows, Claude can run PowerShell commands natively instead of routing through Git Bash. See [PowerShell tool](/en/tools-reference#powershell-tool) |
294| `CLAUDE_CODE_USE_VERTEX` | Use [Vertex](/en/google-vertex-ai) |294| `CLAUDE_CODE_USE_VERTEX` | Use [Google Cloud's Agent Platform](/en/google-vertex-ai) |
295| `CLAUDE_CONFIG_DIR` | Override the configuration directory (default: `~/.claude`). All settings, session history, and plugins are stored under this path, as are credentials on Linux and Windows; on macOS, credentials are in the system Keychain. Useful for running multiple accounts side by side: for example, `alias claude-work='CLAUDE_CONFIG_DIR=~/.claude-work claude'` |295| `CLAUDE_CONFIG_DIR` | Override the configuration directory (default: `~/.claude`). All settings, session history, and plugins are stored under this path, as are credentials on Linux and Windows; on macOS, credentials are in the system Keychain. Useful for running multiple accounts side by side: for example, `alias claude-work='CLAUDE_CONFIG_DIR=~/.claude-work claude'` |
296| `CLAUDE_DISABLE_ADOPT` | {/* min-version: 2.1.195 */}Set to `1` to stop in-flight background work instead of carrying it over when you background a session by pressing `←` or with [`/background`](/en/agent-view#from-inside-a-session). Claude Code asks you to confirm before backgrounding, then stops the tasks that would otherwise carry over. Requires Claude Code v2.1.195 or later |296| `CLAUDE_DISABLE_ADOPT` | {/* min-version: 2.1.195 */}Set to `1` to stop in-flight background work instead of carrying it over when you background a session by pressing `←` or with [`/background`](/en/agent-view#from-inside-a-session). Claude Code asks you to confirm before backgrounding, then stops the tasks that would otherwise carry over. Requires Claude Code v2.1.195 or later |
297| `CLAUDE_EFFORT` | Set automatically in Bash tool subprocesses and hook commands to the active [effort level](/en/model-config#adjust-effort-level) for the turn: `low`, `medium`, `high`, `xhigh`, or `max`. Ultracode is not a distinct level and reports as `xhigh`. Matches the `effort.level` field passed to [hooks](/en/hooks). Only set when the current model supports the effort parameter |297| `CLAUDE_EFFORT` | Set automatically in Bash tool subprocesses and hook commands to the active [effort level](/en/model-config#adjust-effort-level) for the turn: `low`, `medium`, `high`, `xhigh`, or `max`. Ultracode is not a distinct level and reports as `xhigh`. Matches the `effort.level` field passed to [hooks](/en/hooks). Only set when the current model supports the effort parameter |
298| `CLAUDE_ENABLE_BYTE_WATCHDOG` | Set to `1` to force-enable the byte-level streaming idle watchdog, or set to `0` to force-disable it. When unset, the watchdog is enabled by default for direct Anthropic API and [Claude Platform on AWS](/en/claude-platform-on-aws) connections. The byte watchdog aborts a connection when no bytes arrive on the wire for 180 seconds by default on direct Anthropic API connections, 300 seconds on Claude Platform on AWS and when enabled on Bedrock, or for the value of `CLAUDE_STREAM_IDLE_TIMEOUT_MS` when that is set, which is clamped to a minimum of 5 minutes, independent of the event-level watchdog |298| `CLAUDE_ENABLE_BYTE_WATCHDOG` | Set to `1` to force-enable the byte-level streaming idle watchdog, or set to `0` to force-disable it. When unset, the watchdog is enabled by default for direct Anthropic API and [Claude Platform on AWS](/en/claude-platform-on-aws) connections. The byte watchdog aborts a connection when no bytes arrive on the wire for 180 seconds by default on direct Anthropic API connections, 300 seconds on Claude Platform on AWS and when enabled on Amazon Bedrock, or for the value of `CLAUDE_STREAM_IDLE_TIMEOUT_MS` when that is set, which is clamped to a minimum of 5 minutes, independent of the event-level watchdog |
299| `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK` | Set to `1` to enable the byte-level streaming idle watchdog on Amazon Bedrock `vnd.amazon.eventstream` responses. Off by default. Configure the timeout with `CLAUDE_STREAM_IDLE_TIMEOUT_MS` |299| `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK` | Set to `1` to enable the byte-level streaming idle watchdog on Amazon Bedrock `vnd.amazon.eventstream` responses. Off by default. Configure the timeout with `CLAUDE_STREAM_IDLE_TIMEOUT_MS` |
300| `CLAUDE_ENABLE_STREAM_WATCHDOG` | Set to `0` to force-disable the event-level streaming idle watchdog, or set to `1` to force-enable it. {/* min-version: 2.1.196 */}When unset, the watchdog is on by default for all providers. Before v2.1.196, the unset default was server-controlled on the direct Anthropic API and off on other providers. {/* min-version: 2.1.169 */}As of v2.1.169, providers other than the direct Anthropic API and Claude Platform on AWS also have a default-on 5-minute body idle timeout independent of this variable; see `API_FORCE_IDLE_TIMEOUT`. On Bedrock, you can also enable the independent byte-level watchdog with `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK`; the two run together when both are set. Configure the timeout with `CLAUDE_STREAM_IDLE_TIMEOUT_MS` |300| `CLAUDE_ENABLE_STREAM_WATCHDOG` | Set to `0` to force-disable the event-level streaming idle watchdog, or set to `1` to force-enable it. {/* min-version: 2.1.196 */}When unset, the watchdog is on by default for all providers. Before v2.1.196, the unset default was server-controlled on the direct Anthropic API and off on other providers. {/* min-version: 2.1.169 */}As of v2.1.169, providers other than the direct Anthropic API and Claude Platform on AWS also have a default-on 5-minute body idle timeout independent of this variable; see `API_FORCE_IDLE_TIMEOUT`. On Amazon Bedrock, you can also enable the independent byte-level watchdog with `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK`; the two run together when both are set. Configure the timeout with `CLAUDE_STREAM_IDLE_TIMEOUT_MS` |
301| `CLAUDE_ENV_FILE` | Path to a shell script whose contents Claude Code runs before each Bash command in the same shell process, so exports in the file are visible to the command. Use to persist virtualenv or conda activation across commands. Also populated dynamically by [SessionStart](/en/hooks#persist-environment-variables), [Setup](/en/hooks#setup), [CwdChanged](/en/hooks#cwdchanged), and [FileChanged](/en/hooks#filechanged) hooks |301| `CLAUDE_ENV_FILE` | Path to a shell script whose contents Claude Code runs before each Bash command in the same shell process, so exports in the file are visible to the command. Use to persist virtualenv or conda activation across commands. Also populated dynamically by [SessionStart](/en/hooks#persist-environment-variables), [Setup](/en/hooks#setup), [CwdChanged](/en/hooks#cwdchanged), and [FileChanged](/en/hooks#filechanged) hooks |
302| `CLAUDE_REMOTE_CONTROL_SESSION_NAME_PREFIX` | Prefix for auto-generated [Remote Control](/en/remote-control) session names when no explicit name is provided. Defaults to your machine's hostname, producing names like `myhost-graceful-unicorn`. The `--remote-control-session-name-prefix` CLI flag sets the same value for a single invocation |302| `CLAUDE_REMOTE_CONTROL_SESSION_NAME_PREFIX` | Prefix for auto-generated [Remote Control](/en/remote-control) session names when no explicit name is provided. Defaults to your machine's hostname, producing names like `myhost-graceful-unicorn`. The `--remote-control-session-name-prefix` CLI flag sets the same value for a single invocation |
303| `CLAUDE_STREAM_IDLE_TIMEOUT_MS` | Timeout in milliseconds before the streaming idle watchdog closes a stalled connection. When you set this variable explicitly, the minimum is `300000` (5 minutes); lower values are silently clamped to absorb extended thinking pauses and proxy buffering. When unset, the event-level watchdog defaults to 300 seconds and the byte-level watchdog defaults to 180 seconds on direct Anthropic API connections (300 seconds on Claude Platform on AWS and other providers). The unset 180-second byte-watchdog default is a separate value and is not subject to the 5-minute clamp. The body idle timeout described under `API_FORCE_IDLE_TIMEOUT` applies independently. On Bedrock, also applies when `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK=1` |303| `CLAUDE_STREAM_IDLE_TIMEOUT_MS` | Timeout in milliseconds before the streaming idle watchdog closes a stalled connection. When you set this variable explicitly, the minimum is `300000` (5 minutes); lower values are silently clamped to absorb extended thinking pauses and proxy buffering. When unset, the event-level watchdog defaults to 300 seconds and the byte-level watchdog defaults to 180 seconds on direct Anthropic API connections (300 seconds on Claude Platform on AWS and other providers). The unset 180-second byte-watchdog default is a separate value and is not subject to the 5-minute clamp. The body idle timeout described under `API_FORCE_IDLE_TIMEOUT` applies independently. On Amazon Bedrock, also applies when `CLAUDE_ENABLE_BYTE_WATCHDOG_BEDROCK=1` |
304| `DEBUG` | Set to `1` to enable debug mode, equivalent to launching with [`--debug`](/en/cli-reference#cli-flags). Debug logs are written to `~/.claude/debug/<session-id>.txt`, or to the path set by `CLAUDE_CODE_DEBUG_LOGS_DIR`. Only the truthy values `1`, `true`, `yes`, and `on` enable debug mode, so namespace patterns like `DEBUG=express:*` set for other tools do not trigger it |304| `DEBUG` | Set to `1` to enable debug mode, equivalent to launching with [`--debug`](/en/cli-reference#cli-flags). Debug logs are written to `~/.claude/debug/<session-id>.txt`, or to the path set by `CLAUDE_CODE_DEBUG_LOGS_DIR`. Only the truthy values `1`, `true`, `yes`, and `on` enable debug mode, so namespace patterns like `DEBUG=express:*` set for other tools do not trigger it |
305| `DISABLE_AUTOUPDATER` | Set to `1` to disable automatic background updates. Manual `claude update` still works. Use `DISABLE_UPDATES` to block both |305| `DISABLE_AUTOUPDATER` | Set to `1` to disable automatic background updates. Manual `claude update` still works. Use `DISABLE_UPDATES` to block both |
306| `DISABLE_AUTO_COMPACT` | Set to `1` to disable automatic compaction when approaching the context limit. The manual `/compact` command remains available. Use when you want explicit control over when compaction occurs |306| `DISABLE_AUTO_COMPACT` | Set to `1` to disable automatic compaction when approaching the context limit. The manual `/compact` command remains available. Use when you want explicit control over when compaction occurs |
312| `DISABLE_FEEDBACK_COMMAND` | Set to `1` to disable the `/feedback` command. The older name `DISABLE_BUG_COMMAND` is also accepted |312| `DISABLE_FEEDBACK_COMMAND` | Set to `1` to disable the `/feedback` command. The older name `DISABLE_BUG_COMMAND` is also accepted |
313| `DISABLE_GROWTHBOOK` | Set to `1` to disable GrowthBook feature-flag fetching and use code defaults for every flag. Telemetry event logging stays on unless `DISABLE_TELEMETRY` is also set |313| `DISABLE_GROWTHBOOK` | Set to `1` to disable GrowthBook feature-flag fetching and use code defaults for every flag. Telemetry event logging stays on unless `DISABLE_TELEMETRY` is also set |
314| `DISABLE_INSTALLATION_CHECKS` | Set to `1` to disable installation warnings. Use only when manually managing the installation location, as this can mask issues with standard installations |314| `DISABLE_INSTALLATION_CHECKS` | Set to `1` to disable installation warnings. Use only when manually managing the installation location, as this can mask issues with standard installations |
315| `DISABLE_INSTALL_GITHUB_APP_COMMAND` | Set to `1` to hide the `/install-github-app` command. Already hidden when using third-party providers (Bedrock, Vertex, or Foundry) |315| `DISABLE_INSTALL_GITHUB_APP_COMMAND` | Set to `1` to hide the `/install-github-app` command. Already hidden when using third-party providers (Amazon Bedrock, Google Cloud's Agent Platform, or Microsoft Foundry) |
316| `DISABLE_INTERLEAVED_THINKING` | Set to `1` to prevent sending the interleaved-thinking beta header. Useful when your LLM gateway or provider does not support [interleaved thinking](https://platform.claude.com/docs/en/build-with-claude/extended-thinking#interleaved-thinking) |316| `DISABLE_INTERLEAVED_THINKING` | Set to `1` to prevent sending the interleaved-thinking beta header. Useful when your LLM gateway or provider does not support [interleaved thinking](https://platform.claude.com/docs/en/build-with-claude/extended-thinking#interleaved-thinking) |
317| `DISABLE_LOGIN_COMMAND` | Set to `1` to hide the `/login` command. Useful when authentication is handled externally via API keys or `apiKeyHelper` |317| `DISABLE_LOGIN_COMMAND` | Set to `1` to hide the `/login` command. Useful when authentication is handled externally via API keys or `apiKeyHelper` |
318| `DISABLE_LOGOUT_COMMAND` | Set to `1` to hide the `/logout` command |318| `DISABLE_LOGOUT_COMMAND` | Set to `1` to hide the `/logout` command |
326| `DISABLE_UPGRADE_COMMAND` | Set to `1` to hide the `/upgrade` command |326| `DISABLE_UPGRADE_COMMAND` | Set to `1` to hide the `/upgrade` command |
327| `DO_NOT_TRACK` | Set to `1` to opt out of telemetry. Equivalent to setting `DISABLE_TELEMETRY`. Claude Code honors this as the cross-tool convention recognized by many developer CLIs |327| `DO_NOT_TRACK` | Set to `1` to opt out of telemetry. Equivalent to setting `DISABLE_TELEMETRY`. Claude Code honors this as the cross-tool convention recognized by many developer CLIs |
328| `ENABLE_CLAUDEAI_MCP_SERVERS` | Set to `false` to disable [claude.ai MCP servers](/en/mcp#use-mcp-servers-from-claude-ai) in Claude Code. Enabled by default for logged-in users. To disable per-project or per-org, set [`disableClaudeAiConnectors`](/en/settings#available-settings) in settings instead |328| `ENABLE_CLAUDEAI_MCP_SERVERS` | Set to `false` to disable [claude.ai MCP servers](/en/mcp#use-mcp-servers-from-claude-ai) in Claude Code. Enabled by default for logged-in users. To disable per-project or per-org, set [`disableClaudeAiConnectors`](/en/settings#available-settings) in settings instead |
329| `ENABLE_PROMPT_CACHING_1H` | Set to `1` to request a 1-hour [prompt cache TTL](/en/prompt-caching#cache-lifetime) instead of the default 5 minutes. Intended for API key, [Bedrock](/en/amazon-bedrock), [Vertex](/en/google-vertex-ai), [Foundry](/en/microsoft-foundry), and [Claude Platform on AWS](/en/claude-platform-on-aws) users. Subscription users within included usage receive 1-hour TTL automatically. 1-hour cache writes are billed at a higher rate |329| `ENABLE_PROMPT_CACHING_1H` | Set to `1` to request a 1-hour [prompt cache TTL](/en/prompt-caching#cache-lifetime) instead of the default 5 minutes. Intended for API key, [Amazon Bedrock](/en/amazon-bedrock), [Google Cloud's Agent Platform](/en/google-vertex-ai), [Microsoft Foundry](/en/microsoft-foundry), and [Claude Platform on AWS](/en/claude-platform-on-aws) users. Subscription users within included usage receive 1-hour TTL automatically. 1-hour cache writes are billed at a higher rate |
330| `ENABLE_PROMPT_CACHING_1H_BEDROCK` | Deprecated. Use `ENABLE_PROMPT_CACHING_1H` instead |330| `ENABLE_PROMPT_CACHING_1H_BEDROCK` | Deprecated. Use `ENABLE_PROMPT_CACHING_1H` instead |
331| `ENABLE_TOOL_SEARCH` | Controls [MCP tool search](/en/mcp#scale-with-mcp-tool-search). Unset: all MCP tools deferred by default, but loaded upfront on Vertex AI or when `ANTHROPIC_BASE_URL` points to a non-first-party host. Values: `true` (always defer and send the beta header, requests fail on Vertex AI models earlier than Sonnet 4.5 or Opus 4.5, or on proxies that do not support `tool_reference`), `auto` (threshold mode: load upfront if tools fit within 10% of context), `auto:N` (custom threshold, e.g., `auto:5` for 5%), `false` (load all upfront) |331| `ENABLE_TOOL_SEARCH` | Controls [MCP tool search](/en/mcp#scale-with-mcp-tool-search). Unset: all MCP tools deferred by default, but loaded upfront on Google Cloud's Agent Platform or when `ANTHROPIC_BASE_URL` points to a non-first-party host. Values: `true` (always defer and send the beta header, requests fail on Google Cloud's Agent Platform models earlier than Sonnet 4.5 or Opus 4.5, or on proxies that do not support `tool_reference`), `auto` (threshold mode: load upfront if tools fit within 10% of context), `auto:N` (custom threshold, e.g., `auto:5` for 5%), `false` (load all upfront) |
332| `FALLBACK_FOR_ALL_PRIMARY_MODELS` | Set to any non-empty value to make all models, not only Opus, stop retrying with a repeated-overload error when no fallback model is configured. {/* min-version: 2.1.160 */}As of v2.1.160, a configured [fallback model chain](/en/model-config#fallback-model-chains) triggers on repeated overload errors for any primary model, so this variable does not affect switching to a fallback model |332| `FALLBACK_FOR_ALL_PRIMARY_MODELS` | Set to any non-empty value to make all models, not only Opus, stop retrying with a repeated-overload error when no fallback model is configured. {/* min-version: 2.1.160 */}As of v2.1.160, a configured [fallback model chain](/en/model-config#fallback-model-chains) triggers on repeated overload errors for any primary model, so this variable does not affect switching to a fallback model |
333| `FORCE_AUTOUPDATE_PLUGINS` | Set to `1` to force plugin auto-updates even when the main auto-updater is disabled via `DISABLE_AUTOUPDATER` |333| `FORCE_AUTOUPDATE_PLUGINS` | Set to `1` to force plugin auto-updates even when the main auto-updater is disabled via `DISABLE_AUTOUPDATER` |
334| `FORCE_PROMPT_CACHING_5M` | Set to `1` to force the 5-minute prompt cache TTL even when 1-hour TTL would otherwise apply. Overrides `ENABLE_PROMPT_CACHING_1H` |334| `FORCE_PROMPT_CACHING_5M` | Set to `1` to force the 5-minute prompt cache TTL even when 1-hour TTL would otherwise apply. Overrides `ENABLE_PROMPT_CACHING_1H` |
360| `SLASH_COMMAND_TOOL_CHAR_BUDGET` | Override the character budget for skill metadata shown to the [Skill tool](/en/skills#control-who-invokes-a-skill). The budget scales dynamically at 1% of the context window, with a fallback of 8,000 characters. Legacy name kept for backwards compatibility |360| `SLASH_COMMAND_TOOL_CHAR_BUDGET` | Override the character budget for skill metadata shown to the [Skill tool](/en/skills#control-who-invokes-a-skill). The budget scales dynamically at 1% of the context window, with a fallback of 8,000 characters. Legacy name kept for backwards compatibility |
361| `TASK_MAX_OUTPUT_LENGTH` | Maximum number of characters in [subagent](/en/sub-agents) output before truncation (default: 32000, maximum: 160000). When truncated, the full output is saved to disk and the path is included in the truncated response |361| `TASK_MAX_OUTPUT_LENGTH` | Maximum number of characters in [subagent](/en/sub-agents) output before truncation (default: 32000, maximum: 160000). When truncated, the full output is saved to disk and the path is included in the truncated response |
362| `USE_BUILTIN_RIPGREP` | Set to `0` to use system-installed `rg` instead of `rg` included with Claude Code |362| `USE_BUILTIN_RIPGREP` | Set to `0` to use system-installed `rg` instead of `rg` included with Claude Code |
363| `VERTEX_REGION_CLAUDE_3_5_HAIKU` | Override region for Claude 3.5 Haiku when using Vertex AI |363| `VERTEX_REGION_CLAUDE_3_5_HAIKU` | Override region for Claude 3.5 Haiku when using Google Cloud's Agent Platform |
364| `VERTEX_REGION_CLAUDE_3_5_SONNET` | Override region for Claude 3.5 Sonnet when using Vertex AI |364| `VERTEX_REGION_CLAUDE_3_5_SONNET` | Override region for Claude 3.5 Sonnet when using Google Cloud's Agent Platform |
365| `VERTEX_REGION_CLAUDE_3_7_SONNET` | Override region for Claude 3.7 Sonnet when using Vertex AI |365| `VERTEX_REGION_CLAUDE_3_7_SONNET` | Override region for Claude 3.7 Sonnet when using Google Cloud's Agent Platform |
366| `VERTEX_REGION_CLAUDE_4_0_OPUS` | Override region for Claude 4.0 Opus when using Vertex AI |366| `VERTEX_REGION_CLAUDE_4_0_OPUS` | Override region for Claude 4.0 Opus when using Google Cloud's Agent Platform |
367| `VERTEX_REGION_CLAUDE_4_0_SONNET` | Override region for Claude 4.0 Sonnet when using Vertex AI |367| `VERTEX_REGION_CLAUDE_4_0_SONNET` | Override region for Claude 4.0 Sonnet when using Google Cloud's Agent Platform |
368| `VERTEX_REGION_CLAUDE_4_1_OPUS` | Override region for Claude 4.1 Opus when using Vertex AI |368| `VERTEX_REGION_CLAUDE_4_1_OPUS` | Override region for Claude 4.1 Opus when using Google Cloud's Agent Platform |
369| `VERTEX_REGION_CLAUDE_4_5_OPUS` | Override region for Claude Opus 4.5 when using Vertex AI |369| `VERTEX_REGION_CLAUDE_4_5_OPUS` | Override region for Claude Opus 4.5 when using Google Cloud's Agent Platform |
370| `VERTEX_REGION_CLAUDE_4_5_SONNET` | Override region for Claude Sonnet 4.5 when using Vertex AI |370| `VERTEX_REGION_CLAUDE_4_5_SONNET` | Override region for Claude Sonnet 4.5 when using Google Cloud's Agent Platform |
371| `VERTEX_REGION_CLAUDE_4_6_OPUS` | Override region for Claude Opus 4.6 when using Vertex AI |371| `VERTEX_REGION_CLAUDE_4_6_OPUS` | Override region for Claude Opus 4.6 when using Google Cloud's Agent Platform |
372| `VERTEX_REGION_CLAUDE_4_6_SONNET` | Override region for Claude Sonnet 4.6 when using Vertex AI |372| `VERTEX_REGION_CLAUDE_4_6_SONNET` | Override region for Claude Sonnet 4.6 when using Google Cloud's Agent Platform |
373| `VERTEX_REGION_CLAUDE_4_7_OPUS` | {/* min-version: 2.1.111 */}Override region for Claude Opus 4.7 when using Vertex AI. Added in v2.1.111 |373| `VERTEX_REGION_CLAUDE_4_7_OPUS` | {/* min-version: 2.1.111 */}Override region for Claude Opus 4.7 when using Google Cloud's Agent Platform. Added in v2.1.111 |
374| `VERTEX_REGION_CLAUDE_4_8_OPUS` | {/* min-version: 2.1.154 */}Override region for Claude Opus 4.8 when using Vertex AI. Added in v2.1.154 |374| `VERTEX_REGION_CLAUDE_4_8_OPUS` | {/* min-version: 2.1.154 */}Override region for Claude Opus 4.8 when using Google Cloud's Agent Platform. Added in v2.1.154 |
375| `VERTEX_REGION_CLAUDE_5_SONNET` | {/* min-version: 2.1.197 */}Override region for Claude Sonnet 5 when using Vertex AI. Added in v2.1.197 |375| `VERTEX_REGION_CLAUDE_5_SONNET` | {/* min-version: 2.1.197 */}Override region for Claude Sonnet 5 when using Google Cloud's Agent Platform. Added in v2.1.197 |
376| `VERTEX_REGION_CLAUDE_FABLE_5` | {/* min-version: 2.1.170 */}Override region for Claude Fable 5 when using Vertex AI. Added in v2.1.170 |376| `VERTEX_REGION_CLAUDE_FABLE_5` | {/* min-version: 2.1.170 */}Override region for Claude Fable 5 when using Google Cloud's Agent Platform. Added in v2.1.170 |
377| `VERTEX_REGION_CLAUDE_HAIKU_4_5` | Override region for Claude Haiku 4.5 when using Vertex AI |377| `VERTEX_REGION_CLAUDE_HAIKU_4_5` | Override region for Claude Haiku 4.5 when using Google Cloud's Agent Platform |
378 378
379Standard OpenTelemetry exporter variables (`OTEL_METRICS_EXPORTER`, `OTEL_LOGS_EXPORTER`, `OTEL_EXPORTER_OTLP_ENDPOINT`, `OTEL_EXPORTER_OTLP_PROTOCOL`, `OTEL_EXPORTER_OTLP_HEADERS`, `OTEL_METRIC_EXPORT_INTERVAL`, `OTEL_RESOURCE_ATTRIBUTES`, and signal-specific variants) are also supported. See [Monitoring](/en/monitoring-usage) for configuration details.379Standard OpenTelemetry exporter variables (`OTEL_METRICS_EXPORTER`, `OTEL_LOGS_EXPORTER`, `OTEL_EXPORTER_OTLP_ENDPOINT`, `OTEL_EXPORTER_OTLP_PROTOCOL`, `OTEL_EXPORTER_OTLP_HEADERS`, `OTEL_METRIC_EXPORT_INTERVAL`, `OTEL_RESOURCE_ATTRIBUTES`, and signal-specific variants) are also supported. See [Monitoring](/en/monitoring-usage) for configuration details.
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