Environment variables changedenv-vars
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248248| `CLAUDE_CODE_DISABLE_MOUSE` | Set to `1` to disable mouse tracking in [fullscreen rendering](/docs/en/fullscreen). Keyboard scrolling with `PgUp` and `PgDn` still works. Use this to keep your terminal's native copy-on-select behavior |
249249| `CLAUDE_CODE_DISABLE_MOUSE_CLICKS` | Set to `1` to disable click, drag, and hover handling in [fullscreen rendering](/docs/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 |
250250| `CLAUDE_CODE_DISABLE_MTLS_RELOAD_ON_STALE_CONNECTION` | Set to `1` to stop Claude Code from re-reading the [mTLS client certificate and key](/docs/en/network-config#mtls-authentication) when an API request fails with a connection-level error, such as a connection reset or a TLS handshake error. With the reload disabled, Claude Code loads rotated files only when it next applies settings or at the next startup. Requires Claude Code v2.1.232 or later |
251| `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` | Set to any non-empty value, such as `1`, to disable nonessential network traffic: auto-updates, telemetry, error reporting, the `/feedback` command, [Claude-drafted feedback](/docs/en/tools-reference#sendfeedback-tool-behavior), release notes, [gateway model discovery](/docs/en/llm-gateway-connect#add-gateway-models-to-the-model-picker) refreshes, and availability checks such as the [fast mode](/docs/en/fast-mode#use-fast-mode-behind-proxies-and-llm-gateways) check. It also stops the [background runs of plugin `command` sources](/docs/en/plugin-marketplaces#when-claude-code-re-runs-the-command), which are local commands rather than network traffic, because they can trigger dependency installs. **Setting it to `0` or `false` still disables this traffic**, unlike most on/off variables; unset the variable to allow it again. Also disables feature-flag fetching, which makes [Remote Control](/docs/en/remote-control#requirements) and the other [features that need feature-flag fetching](#features-that-need-feature-flag-fetching) unavailable. Official plugin marketplace auto-install isn't covered; disable it with `CLAUDE_CODE_DISABLE_OFFICIAL_MARKETPLACE_AUTOINSTALL` |
251| `CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC` | Set to any non-empty value, such as `1`, to disable nonessential network traffic: auto-updates, telemetry, error reporting, the `/feedback` command, [Claude-drafted feedback](/docs/en/tools-reference#sendfeedback-tool-behavior), release notes, the [PR and MR status badge](/docs/en/interactive-mode#pr-review-status) checks, [gateway model discovery](/docs/en/llm-gateway-connect#add-gateway-models-to-the-model-picker) refreshes, and availability checks such as the [fast mode](/docs/en/fast-mode#use-fast-mode-behind-proxies-and-llm-gateways) check. It also stops the [background runs of plugin `command` sources](/docs/en/plugin-marketplaces#when-claude-code-re-runs-the-command), which are local commands rather than network traffic, because they can trigger dependency installs. **Setting it to `0` or `false` still disables this traffic**, unlike most on/off variables; unset the variable to allow it again. Also disables feature-flag fetching, which makes [Remote Control](/docs/en/remote-control#requirements) and the other [features that need feature-flag fetching](#features-that-need-feature-flag-fetching) unavailable. Official plugin marketplace auto-install isn't covered; disable it with `CLAUDE_CODE_DISABLE_OFFICIAL_MARKETPLACE_AUTOINSTALL` |
252252| `CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK` | Set to `1` to disable the non-streaming fallback when a streaming request fails mid-stream. Streaming errors propagate to the retry layer instead. Useful when a proxy or gateway causes the fallback to produce duplicate tool execution |
253253| `CLAUDE_CODE_DISABLE_NOTIFICATION_PRESENCE_CHECK` | Set to `1` to send the `PushNotification` tool's desktop notification even while you are typing in or focused on the terminal. By default the tool skips both the desktop notification and the [mobile push](/docs/en/remote-control#mobile-push-notifications) when it detects recent keyboard activity or terminal focus. This variable disables only that local check, so the server can still suppress the mobile push when it detects that you are active. Requires Claude Code v2.1.193 or later |
254254| `CLAUDE_CODE_DISABLE_OFFICIAL_MARKETPLACE_AUTOINSTALL` | Set to `1` to disable automatic registration of the official plugin marketplace. Claude Code reads the variable when it is about to register the marketplace, usually during a machine's first interactive launch. If the variable is set at that point, Claude Code skips the registration permanently. Unsetting the variable later doesn't undo the skip. Run `claude plugin marketplace add anthropics/claude-plugins-official` to register the marketplace at any time |
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319319| `CLAUDE_CODE_PACKAGE_MANAGER_AUTO_UPDATE` | Set to `1` to let Claude Code run your package manager's upgrade command in the background when a new version is available. Applies to Homebrew and WinGet installations. Other package managers continue to show the upgrade command without running it. See [Auto updates](/docs/en/setup#auto-updates) |
320320| `CLAUDE_CODE_PERFORCE_MODE` | Set to `1` to enable Perforce-aware write protection. When set, Edit, Write, and NotebookEdit fail with a `p4 edit <file>` hint if the target file lacks the owner-write bit, which Perforce clears on synced files until `p4 edit` opens them. This prevents Claude Code from bypassing Perforce change tracking |
321321| `CLAUDE_CODE_PLUGIN_CACHE_DIR` | Override the plugins root directory. Despite the name, this sets the parent directory, not the cache itself: marketplaces and the plugin cache live in subdirectories under this path. Defaults to `~/.claude/plugins` |
322| `CLAUDE_CODE_PLUGIN_GIT_TIMEOUT_MS` | Timeout in milliseconds for git operations when installing or updating plugins (default: 120000). Incr
322| `CLAUDE_CODE_PLUGIN_GIT_TIMEOUT_MS` | Timeout in milliseconds for git operations when installing or updating plugins (default: 120000).
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