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4 pages for claude_code_disable_fast_mode.

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Agent SDK reference - TypeScript Claude Code CLI · in the page agent-sdk/typescript …| | `disabled_by_env` | [`CLAUDE_CODE_DISABLE_FAST_MODE`](/docs/en/env-vars) is set… Environment variables Claude Code CLI · in the page env-vars …| | `CLAUDE_CODE_DISABLE_FAST_MODE` | Set to `1` to disable [fast mode](/docs/en/fast-mode)… Speed up responses with fast mode Claude Code CLI · in the page fast-mode …claude-code) Another option to disable fast mode entirely is to set `CLAUDE_CODE_DISABLE_FAST_MODE=1`. See [Environment variables](/docs/en/env-vars). ### Use fast mode behind proxies and LLM gatewa… Claude Code settings reference Claude Code CLI · in the page settings-reference …*Default**: unset, so fast mode is off * **Per-session overrides**: [`CLAUDE_CODE_DISABLE_FAST_MODE`](/docs/en/env-vars) turns fast mode off for one session, and this key can't turn it back on ```jso…