Claude Code CLI Environment Variables

# Claude Code CLI Environment Variables
# This file lists all environment variables used in cli.js with explanations

process.env.__CFB - Internal Node.js buffer flag
process.env.__MINIMATCH_TESTING_PLATFORM__ - Testing flag for minimatch library platform detection
process.env.ALACRITTY_LOG - Alacritty terminal emulator log level configuration
process.env.ALIYUN_REGION_ID - Alibaba Cloud region identifier for Chinese cloud services
process.env.ANTHROPIC_API_KEY - Primary API key for authenticating with Anthropic's Claude API
process.env.ANTHROPIC_AUTH_TOKEN - Alternative authentication token for Anthropic services
process.env.ANTHROPIC_BASE_URL - Custom base URL for Anthropic API endpoints
process.env.ANTHROPIC_BETAS - Comma-separated list of beta features to enable
process.env.ANTHROPIC_CUSTOM_HEADERS - Custom HTTP headers for Anthropic API requests (JSON format)
process.env.ANTHROPIC_MODEL - Specifies the default Claude model to use
process.env.ANTHROPIC_SMALL_FAST_MODEL - Specifies a smaller, faster model for quick operations
process.env.ANTHROPIC_SMALL_FAST_MODEL_AWS_REGION - AWS region for small fast model when using Bedrock
process.env.ANTHROPIC_VERTEX_PROJECT_ID - Google Cloud Project ID for Vertex AI integration
process.env.API_TIMEOUT_MS - API request timeout in milliseconds
process.env.APPDATA - Windows application data directory path
process.env.AWS_ACCESS_KEY_ID - AWS access key for Bedrock authentication
process.env.AWS_BEARER_TOKEN_BEDROCK - Bearer token for Bedrock authentication
process.env.AWS_DEFAULT_REGION - Default AWS region for services
process.env.AWS_EXECUTION_ENV - AWS execution environment identifier
process.env.AWS_PROFILE - AWS profile name for credential selection
process.env.AWS_REGION - AWS region for Bedrock service calls
process.env.AWS_SECRET_ACCESS_KEY - AWS secret key for Bedrock authentication
process.env.AWS_SESSION_TOKEN - AWS session token for temporary credentials
process.env.BASH_DEFAULT_TIMEOUT_MS - Default timeout for bash command execution
process.env.BASH_MAX_OUTPUT_LENGTH - Maximum length of bash command output
process.env.BASH_MAX_TIMEOUT_MS - Maximum timeout allowed for bash commands
process.env.BEDROCK_BASE_URL - Custom base URL for AWS Bedrock API
process.env.BROWSER - Default browser executable path
process.env.BUN_INSTALL - Bun JavaScript runtime installation directory
process.env.C - System C drive or temporary variable
process.env.CF_PAGES_COMMIT_SHA - Cloudflare Pages deployment commit SHA
process.env.CHOKIDAR_INTERVAL - File watching polling interval in milliseconds (default: 100ms). Sets how frequently files are checked when CHOKIDAR_USEPOLLING=true. Lower values = more responsive but higher CPU usage. Example: CHOKIDAR_INTERVAL=500 for 500ms polling interval.
process.env.CHOKIDAR_USEPOLLING - Controls file watching method. Values: "true"/"1" (use polling), "false"/"0" (use native events). Default: false (native events). Set to "true" when native filesystem events don't work (network drives, Docker volumes, WSL). Polling is more resource-intensive but more reliable across different environments.
process.env.CLAUBBIT - Internal Anthropic development/debugging flag. Values: "true"/"false". Not intended for end-user configuration. Used for internal testing and feature flags during development.
process.env.CLAUDE_BASH_MAINTAIN_PROJECT_WORKING_DIR - Controls working directory consistency for bash commands. Values: "1"/"true"/"yes"/"on" (maintain project directory), "0"/"false"/"no"/"off" (allow directory changes). Default: false. When enabled, all bash commands execute in the project directory context for consistency.
process.env.CLAUDE_CODE_ACTION - Controls permission mode for Claude Code operations. Values: "acceptEdits" (ask before file changes), "plan" (analysis only, no modifications), "bypassPermissions" (auto-accept all operations), "default" (standard interactive behavior). Use "plan" for safe analysis, "acceptEdits" for careful interactive mode, "bypassPermissions" for automated/CI environments.
process.env.CLAUDE_CODE_API_KEY_HELPER_TTL_MS - Time-to-live for API key helper cache
process.env.CLAUDE_CODE_AUTO_CONNECT_IDE - Boolean flag to automatically connect to IDE
process.env.CLAUDE_CODE_CLIENT_CERT - Path to client certificate for TLS authentication
process.env.CLAUDE_CODE_CLIENT_KEY - Path to client private key for TLS authentication
process.env.CLAUDE_CODE_CLIENT_KEY_PASSPHRASE - Passphrase for encrypted client private key
process.env.CLAUDE_CODE_DISABLE_COMMAND_INJECTION_CHECK - Disables command injection security checks
process.env.CLAUDE_CODE_DISABLE_FINE_GRAINED_TOOL_STREAMING - Disables detailed tool execution streaming
process.env.CLAUDE_CODE_DISABLE_NONESSENTIAL_TRAFFIC - Reduces non-critical network requests
process.env.CLAUDE_CODE_DISABLE_TERMINAL_TITLE - Prevents updating terminal window title
process.env.CLAUDE_CODE_DONT_INHERIT_ENV - Prevents inheriting environment variables
process.env.CLAUDE_CODE_ENABLE_TELEMETRY - Boolean flag to enable telemetry collection
process.env.CLAUDE_CODE_ENTRYPOINT - Custom application entrypoint. Allows specifying alternative entry points or initialization modules for specialized deployments. Values: file paths or module names. Used for custom initialization scenarios.
process.env.CLAUDE_CODE_EXTRA_BODY - Additional JSON data for API requests
process.env.CLAUDE_CODE_GIT_BASH_PATH - Path to Git Bash executable on Windows
process.env.CLAUDE_CODE_IDE_HOST_OVERRIDE - Custom host for IDE communication
process.env.CLAUDE_CODE_IDE_SKIP_AUTO_INSTALL - Skips automatic IDE extension installation
process.env.CLAUDE_CODE_IDE_SKIP_VALID_CHECK - Bypasses IDE validation checks
process.env.CLAUDE_CODE_MAX_OUTPUT_TOKENS - Maximum number of output tokens for responses
process.env.CLAUDE_CODE_MAX_RETRIES - Maximum number of request retries on failure
process.env.CLAUDE_CODE_OAUTH_TOKEN - OAuth token for authentication
process.env.CLAUDE_CODE_OTEL_SHUTDOWN_TIMEOUT_MS - OpenTelemetry shutdown timeout
process.env.CLAUDE_CODE_SHELL_PREFIX - Prefix for shell commands
process.env.CLAUDE_CODE_SKIP_BEDROCK_AUTH - Skips AWS Bedrock authentication
process.env.CLAUDE_CODE_SKIP_VERTEX_AUTH - Skips Google Vertex AI authentication
process.env.CLAUDE_CODE_SSE_PORT - Port for Server-Sent Events communication
process.env.CLAUDE_CODE_SUBAGENT_MODEL - Model to use for sub-agent operations
process.env.CLAUDE_CODE_USE_BEDROCK - Boolean flag to use AWS Bedrock instead of direct API
process.env.CLAUDE_CODE_USE_VERTEX - Boolean flag to use Google Vertex AI
process.env.CLAUDE_CONFIG_DIR - Custom directory for Claude Code configuration files
process.env.CLAUDE_FORCE_DISPLAY_SURVEY - Forces display of user surveys
process.env.CLOUD_ML_REGION - Google Cloud ML region configuration
process.env.CLOUD_RUN_JOB - Google Cloud Run job identifier
process.env.COMMIT_REF - Git commit reference for deployments
process.env.COREPACK_ENABLE_AUTO_PIN - Enables automatic package manager pinning
process.env.CURSOR_TRACE_ID - Cursor IDE trace identifier for debugging
process.env.DEBUG - General debug flag for verbose logging
process.env.DEBUG_AUTH - Enables authentication debugging
process.env.DETECT_GCP_RETRIES - Configures GCP retry detection logic
process.env.DEV - Development mode flag
process.env.DISABLE_AUTOUPDATER - Disables automatic updates
process.env.DISABLE_BUG_COMMAND - Disables bug reporting command
process.env.DISABLE_COST_WARNINGS - Disables API cost warnings
process.env.DISABLE_DOCTOR_COMMAND - Disables diagnostic doctor command
process.env.DISABLE_ERROR_REPORTING - Disables automatic error reporting
process.env.DISABLE_INSTALL_GITHUB_APP_COMMAND - Disables GitHub app installation command
process.env.DISABLE_INTERLEAVED_THINKING - Disables interleaved thinking mode. Values: "1"/"true"/"yes"/"on" (disable interleaved thinking). Interleaved thinking allows reasoning to be interspersed with responses for transparency. Disable for more traditional response patterns or when interleaved thinking causes confusion.
process.env.DISABLE_LOGIN_COMMAND - Disables login command
process.env.DISABLE_LOGOUT_COMMAND - Disables logout command
process.env.DISABLE_MICROCOMPACT - Disables microcompact output formatting/compression. Values: "1"/"true"/"yes"/"on" (disable microcompact). Microcompact likely compacts output for efficiency. Disable when you need verbose output or when microcompact causes formatting issues.
process.env.DISABLE_MIGRATE_INSTALLER_COMMAND - Disables installer migration command
process.env.DISABLE_PROMPT_CACHING - Disables prompt caching optimization
process.env.DISABLE_TELEMETRY - Disables telemetry collection
process.env.DISABLE_UPGRADE_COMMAND - Disables upgrade command
process.env.DYNO - Heroku dyno identifier
process.env.EDITOR - Default text editor executable
process.env.FLY_REGION - Fly.io deployment region
process.env.FORCE_CODE_TERMINAL - Forces terminal/CLI mode even in environments that might default to GUI. Values: "true"/"false". Use in headless environments or when you want to ensure CLI behavior regardless of the detected environment.
process.env.FUNCTION_NAME - Cloud function name identifier
process.env.FUNCTION_TARGET - Cloud function target endpoint
process.env.GAE_MODULE_NAME - Google App Engine module name
process.env.GAE_SERVICE - Google App Engine service identifier
process.env.GCE_METADATA_HOST - Google Compute Engine metadata server host
process.env.GCE_METADATA_IP - Google Compute Engine metadata server IP
process.env.GCLOUD_PROJECT - Google Cloud project identifier
process.env.GCP_PROJECT - Google Cloud Platform project ID
process.env.GITHUB_ACTIONS - GitHub Actions environment indicator
process.env.GITHUB_ACTOR - GitHub Actions actor (user/bot) name
process.env.GITHUB_ACTOR_ID - GitHub Actions actor unique identifier
process.env.GITHUB_EVENT_NAME - GitHub Actions triggering event name
process.env.GITHUB_REPOSITORY_ID - GitHub repository unique identifier
process.env.GITHUB_REPOSITORY_OWNER - GitHub repository owner name
process.env.GITHUB_REPOSITORY_OWNER_ID - GitHub repository owner unique identifier
process.env.GITHUB_SHA - GitHub commit SHA that triggered the action
process.env.GNOME_TERMINAL_SERVICE - GNOME terminal service identifier
process.env.GOOGLE_APPLICATION_CREDENTIALS - Path to Google Cloud service account JSON
process.env.GOOGLE_CLOUD_PROJECT - Google Cloud project identifier
process.env.GOOGLE_CLOUD_QUOTA_PROJECT - Google Cloud quota project for billing
process.env.GRACEFUL_FS_PLATFORM - Graceful-fs library platform detection
process.env.GRPC_DEFAULT_SSL_ROOTS_FILE_PATH - gRPC SSL root certificates file path
process.env.GRPC_EXPERIMENTAL_ENABLE_OUTLIER_DETECTION - Enables gRPC outlier detection
process.env.GRPC_NODE_TRACE - Node.js gRPC tracing configuration
process.env.GRPC_NODE_USE_ALTERNATIVE_RESOLVER - Uses alternative gRPC resolver
process.env.GRPC_NODE_VERBOSITY - Node.js gRPC verbosity level
process.env.GRPC_SSL_CIPHER_SUITES - gRPC SSL cipher suites configuration
process.env.GRPC_TRACE - gRPC tracing configuration
process.env.GRPC_VERBOSITY - gRPC verbosity level
process.env.HOME - User home directory path (Unix/Linux/macOS)
process.env.HTTP_PROXY - HTTP proxy server URL
process.env.HTTPS_PROXY - HTTPS proxy server URL
process.env.IBM_CLOUD_REGION - IBM Cloud region identifier
process.env.IS_DEMO - Demo mode flag
process.env.IS_SANDBOX - Sandbox environment flag
process.env.JEST_WORKER_ID - Jest test worker process identifier
process.env.K_CONFIGURATION - Knative configuration name
process.env.K_SERVICE - Knative service name
process.env.KITTY_WINDOW_ID - Kitty terminal window identifier
process.env.KONSOLE_VERSION - KDE Konsole terminal version
process.env.LOCALAPPDATA - Windows local application data directory
process.env.MAX_MCP_OUTPUT_TOKENS - Maximum tokens for MCP server outputs
process.env.MAX_THINKING_TOKENS - Maximum tokens for model thinking steps
process.env.MCP_OAUTH_CALLBACK_PORT - Port for OAuth callback in MCP authentication
process.env.MCP_SERVER_CONNECTION_BATCH_SIZE - Batch size for MCP server connections
process.env.MCP_TIMEOUT - General timeout for MCP operations
process.env.MCP_TOOL_TIMEOUT - Specific timeout for MCP tool execution
process.env.METADATA_SERVER_DETECTION - Controls cloud metadata server detection
process.env.MSYSTEM - MSYS2/MinGW system type (Windows)
process.env.NETLIFY - Netlify deployment environment indicator
process.env.NO_PROXY - Domains to exclude from proxy usage
process.env.NODE_DEBUG - Node.js debug modules to enable
process.env.NODE_EXTRA_CA_CERTS - Path to additional Node.js CA certificates
process.env.NODE_OPTIONS - Node.js runtime options
process.env.NODE_V8_COVERAGE - V8 code coverage output directory
process.env.OSTYPE - Operating system type identifier
process.env.OTEL_EXPORTER_OTLP_ENDPOINT - OpenTelemetry OTLP exporter endpoint
process.env.OTEL_EXPORTER_OTLP_HEADERS - OpenTelemetry OTLP exporter headers
process.env.OTEL_EXPORTER_OTLP_INSECURE - OpenTelemetry OTLP insecure connection flag
process.env.OTEL_EXPORTER_OTLP_LOGS_PROTOCOL - OpenTelemetry logs protocol
process.env.OTEL_EXPORTER_OTLP_METRICS_PROTOCOL - OpenTelemetry metrics protocol
process.env.OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE - OpenTelemetry metrics temporality
process.env.OTEL_EXPORTER_OTLP_PROTOCOL - OpenTelemetry OTLP protocol
process.env.OTEL_EXPORTER_PROMETHEUS_HOST - Prometheus exporter host
process.env.OTEL_EXPORTER_PROMETHEUS_PORT - Prometheus exporter port
process.env.OTEL_LOG_USER_PROMPTS - Enables logging of user prompts in telemetry
process.env.OTEL_LOGS_EXPORT_INTERVAL - OpenTelemetry logs export interval
process.env.OTEL_LOGS_EXPORTER - OpenTelemetry logs exporter configuration
process.env.OTEL_METRIC_EXPORT_INTERVAL - OpenTelemetry metrics export interval
process.env.OTEL_METRICS_EXPORTER - OpenTelemetry metrics exporter configuration
process.env.PATH - System executable paths (all platforms)
process.env.PATHEXT - Windows executable file extensions
process.env.PKG_CONFIG_PATH - pkg-config library search paths
process.env.PWD - Present working directory
process.env.REGION_NAME - Generic region name for cloud services
process.env.RUNNER_ENVIRONMENT - CI/CD runner environment type
process.env.RUNNER_OS - CI/CD runner operating system
process.env.SENTRY_BAGGAGE - Sentry baggage header for distributed tracing
process.env.SENTRY_DSN - Sentry Data Source Name for error reporting
process.env.SENTRY_ENVIRONMENT - Sentry environment name
process.env.SENTRY_NAME - Sentry client name identifier
process.env.SENTRY_RELEASE - Sentry release version
process.env.SENTRY_TRACE - Sentry trace header for distributed tracing
process.env.SENTRY_TRACES_SAMPLE_RATE - Sentry performance monitoring sample rate
process.env.SENTRY_USE_ENVIRONMENT - Enables Sentry environment detection
process.env.SESSIONNAME - Windows session name
process.env.SHARP_FORCE_GLOBAL_LIBVIPS - Forces Sharp to use global libvips
process.env.SHARP_IGNORE_GLOBAL_LIBVIPS - Ignores global libvips for Sharp
process.env.SHELL - Default shell executable path
process.env.SSH_CLIENT - SSH client connection information
process.env.SSH_CONNECTION - SSH connection details
process.env.SSH_TTY - SSH terminal device
process.env.STY - Screen/tmux session name
process.env.SWE_BENCH_INSTANCE_ID - SWE-Bench evaluation instance identifier
process.env.SWE_BENCH_RUN_ID - SWE-Bench evaluation run identifier
process.env.SWE_BENCH_TASK_ID - SWE-Bench evaluation task identifier
process.env.SYSTEMROOT - Windows system root directory
process.env.TELEPORT_HEADERS - Teleport proxy headers
process.env.TELEPORT_RESUME_URL - Teleport session resume URL
process.env.TEMP - Temporary directory path (Windows)
process.env.TENCENTCLOUD_APPID - Tencent Cloud application ID
process.env.TENCENTCLOUD_REGION - Tencent Cloud region
process.env.TENCENTCLOUD_ZONE - Tencent Cloud availability zone
process.env.TERM - Terminal type identifier
process.env.TERM_PROGRAM - Terminal program name
process.env.TERMINAL_EMULATOR - Terminal emulator name
process.env.TERMINATOR_UUID - Terminator terminal UUID
process.env.TEST_GRACEFUL_FS_GLOBAL_PATCH - Testing flag for graceful-fs global patch
process.env.TILIX_ID - Tilix terminal session identifier
process.env.UNDICI_NO_FG - Disables undici FastGlob usage
process.env.USE_API_CONTEXT_MANAGEMENT - Controls API context management for better memory handling and context optimization. Values: "true"/"false". Default: likely true. Enable for better context handling and memory management; disable for debugging context issues or reducing complexity.
process.env.USE_BUILTIN_RIPGREP - Controls ripgrep binary selection. Values: "true" (use bundled ripgrep), "false" (use system ripgrep). Enable for consistency across environments; disable to use system-installed ripgrep which may be newer or customized.
process.env.USE_LOCAL_OAUTH - Enables local OAuth flow
process.env.USERPROFILE - Windows user profile directory path
process.env.V - Verbose flag or version indicator
process.env.VERCEL - Vercel deployment environment indicator
process.env.VERCEL_BITBUCKET_COMMIT_SHA - Vercel Bitbucket commit SHA
process.env.VERCEL_GIT_COMMIT_SHA - Vercel Git commit SHA
process.env.VERCEL_GITHUB_COMMIT_SHA - Vercel GitHub commit SHA
process.env.VERCEL_GITLAB_COMMIT_SHA - Vercel GitLab commit SHA
process.env.VERCEL_REGION - Vercel deployment region
process.env.VERTEX_BASE_URL - Custom base URL for Google Vertex AI API
process.env.VERTEX_REGION_CLAUDE_3_5_HAIKU - GCP region for Claude 3.5 Haiku model
process.env.VERTEX_REGION_CLAUDE_3_5_SONNET - GCP region for Claude 3.5 Sonnet model
process.env.VERTEX_REGION_CLAUDE_3_7_SONNET - GCP region for Claude 3.7 Sonnet model
process.env.VERTEX_REGION_CLAUDE_4_0_OPUS - GCP region for Claude 4.0 Opus model
process.env.VERTEX_REGION_CLAUDE_4_0_SONNET - GCP region for Claude 4.0 Sonnet model
process.env.VERTEX_REGION_CLAUDE_4_1_OPUS - GCP region for Claude 4.1 Opus model
process.env.VISUAL - Visual editor executable (fallback to EDITOR)
process.env.VSCODE_GIT_ASKPASS_MAIN - VS Code Git askpass main process
process.env.VTE_VERSION - VTE terminal emulator version
process.env.WEBSITE_SITE_NAME - Azure App Service website name
process.env.WS_NO_BUFFER_UTIL - Disables ws library buffer utilities
process.env.WS_NO_UTF_8_VALIDATE - Disables ws library UTF-8 validation
process.env.WSL_DISTRO_NAME - Windows Subsystem for Linux distribution name
process.env.WT_SESSION - Windows Terminal session identifier
process.env.XDG_CACHE_HOME - XDG cache directory path
process.env.XDG_CONFIG_HOME - XDG configuration directory path
process.env.XDG_DATA_HOME - XDG data directory path
process.env.XDG_STATE_HOME - XDG state directory path
process.env.XTERM_VERSION - Xterm terminal version
process.env.ZDOTDIR - Zsh configuration directory
process.env.ZEIT_BITBUCKET_COMMIT_SHA - Zeit (now Vercel) Bitbucket commit SHA
process.env.ZEIT_GITHUB_COMMIT_SHA - Zeit (now Vercel) GitHub commit SHA
process.env.ZEIT_GITLAB_COMMIT_SHA - Zeit (now Vercel) GitLab commit SHA