Claude Code - by Anthropic

Installation

# Install with npm
npm install -g @anthropic-ai/claude-code
# update to latest version with npm
npm update -g @anthropic-ai/claude-code

via docs.claude.com/en/docs/claude-code/setup

Get Version

% claude -v    
1.0.117 (Claude Code)

Usage

Usage: claude [options] [command] [prompt]

Claude Code - starts an interactive session by default, use -p/--print for non-interactive output

Arguments:
  prompt                                            Your prompt

Options:
  -d, --debug [filter]                              Enable debug mode with optional category filtering (e.g., "api,hooks" or "!statsig,!file")
  --verbose                                         Override verbose mode setting from config
  -p, --print                                       Print response and exit (useful for pipes). Note: The workspace trust dialog is skipped when Claude is run with the -p mode. Only use this flag in directories you trust.
  --output-format <format>                          Output format (only works with --print): "text" (default), "json" (single result), or "stream-json" (realtime streaming) (choices: "text", "json", "stream-json")
  --include-partial-messages                        Include partial message chunks as they arrive (only works with --print and --output-format=stream-json)
  --input-format <format>                           Input format (only works with --print): "text" (default), or "stream-json" (realtime streaming input) (choices: "text", "stream-json")
  --mcp-debug                                       [DEPRECATED. Use --debug instead] Enable MCP debug mode (shows MCP server errors)
  --dangerously-skip-permissions                    Bypass all permission checks. Recommended only for sandboxes with no internet access.
  --replay-user-messages                            Re-emit user messages from stdin back on stdout for acknowledgment (only works with --input-format=stream-json and --output-format=stream-json)
  --allowedTools, --allowed-tools <tools...>        Comma or space-separated list of tool names to allow (e.g. "Bash(git:*) Edit")
  --disallowedTools, --disallowed-tools <tools...>  Comma or space-separated list of tool names to deny (e.g. "Bash(git:*) Edit")
  --mcp-config <configs...>                         Load MCP servers from JSON files or strings (space-separated)
  --append-system-prompt <prompt>                   Append a system prompt to the default system prompt
  --permission-mode <mode>                          Permission mode to use for the session (choices: "acceptEdits", "bypassPermissions", "default", "plan")
  -c, --continue                                    Continue the most recent conversation
  -r, --resume [sessionId]                          Resume a conversation - provide a session ID or interactively select a conversation to resume
  --model <model>                                   Model for the current session. Provide an alias for the latest model (e.g. 'sonnet' or 'opus') or a model's full name (e.g. 'claude-sonnet-4-20250514').
  --fallback-model <model>                          Enable automatic fallback to specified model when default model is overloaded (only works with --print)
  --settings <file-or-json>                         Path to a settings JSON file or a JSON string to load additional settings from
  --add-dir <directories...>                        Additional directories to allow tool access to
  --ide                                             Automatically connect to IDE on startup if exactly one valid IDE is available
  --strict-mcp-config                               Only use MCP servers from --mcp-config, ignoring all other MCP configurations
  --session-id <uuid>                               Use a specific session ID for the conversation (must be a valid UUID)
  -v, --version                                     Output the version number
  -h, --help                                        Display help for command

Commands:
  config                                            Manage configuration (eg. claude config set -g theme dark)
  mcp                                               Configure and manage MCP servers
  migrate-installer                                 Migrate from global npm installation to local installation
  setup-token                                       Set up a long-lived authentication token (requires Claude subscription)
  doctor                                            Check the health of your Claude Code auto-updater
  update                                            Check for updates and install if available
  install [options] [target]                        Install Claude Code native build. Use [target] to specify version (stable, latest, or specific version)