Environment variables changedenv-vars
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271271| `CLAUDE_CODE_ENABLE_PROMPT_SUGGESTION` | Set to `false` to turn off prompt suggestions, the grayed-out predictions that appear in your prompt input. Takes precedence over the [`promptSuggestionEnabled`](/docs/en/settings-reference#promptsuggestionenabled) setting, which is what the **Prompt suggestions** toggle in `/config` writes. Claude Code also [pauses suggestions while your account is close to or at its usage limit](/docs/en/interactive-mode#when-claude-code-skips-suggestions). Set to `true` to keep them on until you reach the limit. Requires Claude Code v2.1.238 or later. See [Prompt suggestions](/docs/en/interactive-mode#prompt-suggestions) |
272272| `CLAUDE_CODE_ENABLE_TASKS` | Selects which task-tracking tools Claude Code provides in [sessions that have them](/docs/en/tools-reference#task-tool-availability). By default, Claude Code provides the Task tools `TaskCreate`, `TaskUpdate`, `TaskGet`, and `TaskList`. Set to `0` to get the legacy `TodoWrite` tool instead. See [Task list](/docs/en/interactive-mode#task-list) |
273273| `CLAUDE_CODE_ENABLE_TELEMETRY` | Set to `1` to enable OpenTelemetry data collection for metrics and logging. Required before configuring OTel exporters. See [Monitoring](/docs/en/monitoring-usage) |
274| `CLAUDE_CODE_ENABLE_TODO_TOOLS` | Set to `1` to get the task-tracking tools on the models listed under [Task tool availability](/docs/en/tools-reference#task-tool-availability), where Claude Code otherwise leaves them out. `CLAUDE_CODE_ENABLE_TASKS` still selects the Task tools or `TodoWrite`. Requires Claude Code v2.1.233 or later |
274| `CLAUDE_CODE_ENABLE_TODO_TOOLS` | Set to `1` to get the task-tracking tools on every model. Without it, Claude Code provides them by default only on the models listed under [Task tool availability](/docs/en/tools-reference#task-tool-availability). `CLAUDE_CODE_ENABLE_TASKS` still selects the Task tools or `TodoWrite`. Requires Claude Code v2.1.233 or later |
275275| `CLAUDE_CODE_EXIT_AFTER_STOP_DELAY` | Time in milliseconds to wait after the query loop becomes idle before automatically exiting. Useful for automated workflows and scripts using SDK mode |
276276| `CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS` | Set to `1` to enable [agent teams](/docs/en/agent-teams). Agent teams are experimental and disabled by default |
277277| `CLAUDE_CODE_EXTRA_BODY` | JSON object to merge into the top level of every API request body. Useful for passing provider-specific parameters that Claude Code doesn't expose directly. A value exported in your shell also applies to the [background sessions](/docs/en/agent-view) you dispatch with `claude agents` or `--bg`. Before v2.1.206, background sessions ignored a shell-exported value and used whatever copy the background supervisor process inherited |
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