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HomeDocsClaude Code CLI 14 Aug 2026
One change · claude-code

Environment variables changedenv-vars

Nearest release: v2.1.233, published an hour before this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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249249| `CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL` | Set to `1` to disable virtual scrolling in [fullscreen rendering](/docs/en/fullscreen) and render every message in the transcript. Use this if scrolling in fullscreen mode shows blank regions where messages should appear |
250250| `CLAUDE_CODE_DISABLE_WORKFLOWS` | Set to `1` to disable [workflows](/docs/en/workflows#turn-workflows-off). Equivalent to the [`disableWorkflows`](/docs/en/settings#available-settings) setting |
251251| `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](/docs/en/model-config#adjust-effort-level) |
252| `CLAUDE_CODE_ENABLE_APPEND_SUBAGENT_PROMPT` | Set to `1` to enable appending extra text to the end of every [subagent](/docs/en/sub-agents)'s system prompt. The [`--append-subagent-system-prompt`](/docs/en/cli-reference#cli-flags) flag supplies the appended text and sets this variable automatically, so you don't need to set it yourself. Requires Claude Code v2.1.205 or later |
252| `CLAUDE_CODE_ENABLE_APPEND_SUBAGENT_PROMPT` | Set to `1` to enable appending extra text to the end of the system prompt of every [subagent](/docs/en/sub-agents) other than a [forked subagent](/docs/en/sub-agents#fork-the-current-conversation). The [`--append-subagent-system-prompt`](/docs/en/cli-reference#cli-flags) flag supplies the appended text and sets this variable automatically, so you don't need to set it yourself. Requires Claude Code v2.1.205 or later |
253253| `CLAUDE_CODE_ENABLE_AUTO_MODE` | Accepted for compatibility with older releases and has no effect. Auto mode is available by default on every provider, including Amazon Bedrock, Google Cloud's Agent Platform, Microsoft Foundry, and signed-in [Claude apps gateway](/docs/en/claude-apps-gateway) sessions. In v2.1.158 through v2.1.206, setting this to `1` was required to make [auto mode](/docs/en/permission-modes#eliminate-prompts-with-auto-mode) available on those providers |
254254| `CLAUDE_CODE_ENABLE_AWAY_SUMMARY` | Override [session recap](/docs/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`](/docs/en/settings#available-settings) is `false`. Takes precedence over the setting and `/config` toggle |
255255| `CLAUDE_CODE_ENABLE_BACKGROUND_PLUGIN_REFRESH` | Set to `1` to refresh plugin state at turn boundaries in [non-interactive mode](/docs/en/headless) after a background install completes. Off by default because the refresh changes the system prompt mid-session, which invalidates [prompt caching](/docs/en/prompt-caching) for that turn |
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340340| `CLAUDE_CODE_SKIP_MANTLE_AUTH` | Skip AWS authentication for Amazon Bedrock Mantle (for example, when using an LLM gateway) |
341341| `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 |
342342| `CLAUDE_CODE_SKIP_VERTEX_AUTH` | Skip Google authentication for Google Cloud's Agent Platform (for example, when using an LLM gateway) |
343| `CLAUDE_CODE_STOP_HOOK_BLOCK_CAP` | Maximum number of consecutive times a [Stop](/docs/en/hooks#stop) or [SubagentStop](/docs/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
343| `CLAUDE_CODE_STOP_HOOK_BLOCK_CAP` | Maximum number of consecutive times a [Stop](/docs/en/hooks#stop) or [SubagentStop](/docs/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
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