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CLI commands

You can start sessions, pipe content, resume conversations, and manage updates with these commands:
CommandDescriptionExample
claudeStart interactive sessionclaude
claude "query"Start interactive session with initial promptclaude "explain this project"
claude -p "query"Query via SDK, then exitclaude -p "explain this function"
cat file | claude -p "query"Process piped contentcat logs.txt | claude -p "explain"
claude -cContinue most recent conversation in current directoryclaude -c
claude -c -p "query"Continue via SDKclaude -c -p "Check for type errors"
claude -r "<session>" "query"Resume session by ID or nameclaude -r "auth-refactor" "Finish this PR"
claude updateUpdate to latest versionclaude update
claude auth loginSign in to your Anthropic account. Use --email to pre-fill your email address, --sso to force SSO authentication, and --console to sign in with Anthropic Console for API usage billing instead of a Claude subscriptionclaude auth login --console
claude auth logoutLog out from your Anthropic accountclaude auth logout
claude auth statusShow authentication status as JSON. Use --text for human-readable output. Exits with code 0 if logged in, 1 if notclaude auth status
claude agentsList all configured subagents, grouped by sourceclaude agents
claude mcpConfigure Model Context Protocol (MCP) serversSee the Claude Code MCP documentation.
claude remote-controlStart a Remote Control server to control Claude Code from Claude.ai or the Claude app. Runs in server mode (no local interactive session). See Server mode flagsclaude remote-control --name "My Project"

CLI flags

Customize Claude Code’s behavior with these command-line flags:
FlagDescriptionExample
--add-dirAdd additional working directories for Claude to access (validates each path exists as a directory)claude --add-dir ../apps ../lib
--agentSpecify an agent for the current session (overrides the agent setting)claude --agent my-custom-agent
--agentsDefine custom subagents dynamically via JSON. Uses the same field names as subagent frontmatter, plus a prompt field for the agent’s instructionsclaude --agents '{"reviewer":{"description":"Reviews code","prompt":"You are a code reviewer"}}'
--allow-dangerously-skip-permissionsEnable permission bypassing as an option without immediately activating it. Allows composing with --permission-mode (use with caution)claude --permission-mode plan --allow-dangerously-skip-permissions
--allowedToolsTools that execute without prompting for permission. See permission rule syntax for pattern matching. To restrict which tools are available, use --tools instead"Bash(git log *)" "Bash(git diff *)" "Read"
--append-system-promptAppend custom text to the end of the default system promptclaude --append-system-prompt "Always use TypeScript"
--append-system-prompt-fileLoad additional system prompt text from a file and append to the default promptclaude --append-system-prompt-file ./extra-rules.txt
--betasBeta headers to include in API requests (API key users only)claude --betas interleaved-thinking
--channels(Research preview) MCP servers whose channel notifications Claude should listen for in this session. Space-separated list of plugin:<name>@<marketplace> entries. Requires Claude.ai authenticationclaude --channels plugin:my-notifier@my-marketplace
--chromeEnable Chrome browser integration for web automation and testingclaude --chrome
--continue, -cLoad the most recent conversation in the current directoryclaude --continue
--dangerously-load-development-channelsEnable channels that are not on the approved allowlist, for local development. Accepts plugin:<name>@<marketplace> and server:<name> entries. Prompts for confirmationclaude --dangerously-load-development-channels server:webhook
--dangerously-skip-permissionsSkip permission prompts (use with caution). See permission modes for what this does and does not skipclaude --dangerously-skip-permissions
--debugEnable debug mode with optional category filtering (for example, "api,hooks" or "!statsig,!file")claude --debug "api,mcp"
--disable-slash-commandsDisable all skills and commands for this sessionclaude --disable-slash-commands
--disallowedToolsTools that are removed from the model’s context and cannot be used"Bash(git log *)" "Bash(git diff *)" "Edit"
--effortSet the effort level for the current session. Options: low, medium, high, max (Opus 4.6 only). Session-scoped and does not persist to settingsclaude --effort high
--fallback-modelEnable automatic fallback to specified model when default model is overloaded (print mode only)claude -p --fallback-model sonnet "query"
--fork-sessionWhen resuming, create a new session ID instead of reusing the original (use with --resume or --continue)claude --resume abc123 --fork-session
--from-prResume sessions linked to a specific GitHub PR. Accepts a PR number or URL. Sessions are automatically linked when created via gh pr createclaude --from-pr 123
--ideAutomatically connect to IDE on startup if exactly one valid IDE is availableclaude --ide
--initRun initialization hooks and start interactive modeclaude --init
--init-onlyRun initialization hooks and exit (no interactive session)claude --init-only
--include-partial-messagesInclude partial streaming events in output (requires --print and --output-format=stream-json)claude -p --output-format stream-json --include-partial-messages "query"
--input-formatSpecify input format for print mode (options: text, stream-json)claude -p --output-format json --input-format stream-json
--json-schemaGet validated JSON output matching a JSON Schema after agent completes its workflow (print mode only, see structured outputs)claude -p --json-schema '{"type":"object","properties":{...}}' "query"
--maintenanceRun maintenance hooks and exitclaude --maintenance
--max-budget-usdMaximum dollar amount to spend on API calls before stopping (print mode only)claude -p --max-budget-usd 5.00 "query"
--max-turnsLimit the number of agentic turns (print mode only). Exits with an error when the limit is reached. No limit by defaultclaude -p --max-turns 3 "query"
--mcp-configLoad MCP servers from JSON files or strings (space-separated)claude --mcp-config ./mcp.json
--modelSets the model for the current session with an alias for the latest model (sonnet or opus) or a model’s full nameclaude --model claude-sonnet-4-6
--name, -nSet a display name for the session, shown in /resume and the terminal title. You can resume a named session with claude --resume <name>.

/rename changes the name mid-session and also shows it on the prompt bar
claude -n "my-feature-work"
--no-chromeDisable Chrome browser integration for this sessionclaude --no-chrome
--no-session-persistenceDisable session persistence so sessions are not saved to disk and cannot be resumed (print mode only)claude -p --no-session-persistence "query"
--output-formatSpecify output format for print mode (options: text, json, stream-json)claude -p "query" --output-format json
--permission-modeBegin in a specified permission modeclaude --permission-mode plan
--permission-prompt-toolSpecify an MCP tool to handle permission prompts in non-interactive modeclaude -p --permission-prompt-tool mcp_auth_tool "query"
--plugin-dirLoad plugins from a directory for this session only. Each flag takes one path. Repeat the flag for multiple directories: --plugin-dir A --plugin-dir Bclaude --plugin-dir ./my-plugins
--print, -pPrint response without interactive mode (see Agent SDK documentation for programmatic usage details)claude -p "query"
--remoteCreate a new web session on claude.ai with the provided task descriptionclaude --remote "Fix the login bug"
--remote-control, --rcStart an interactive session with Remote Control enabled so you can also control it from claude.ai or the Claude app. Optionally pass a name for the sessionclaude --remote-control "My Project"
--resume, -rResume a specific session by ID or name, or show an interactive picker to choose a sessionclaude --resume auth-refactor
--session-idUse a specific session ID for the conversation (must be a valid UUID)claude --session-id "550e8400-e29b-41d4-a716-446655440000"
--setting-sourcesComma-separated list of setting sources to load (user, project, local)claude --setting-sources user,project
--settingsPath to a settings JSON file or a JSON string to load additional settings fromclaude --settings ./settings.json
--strict-mcp-configOnly use MCP servers from --mcp-config, ignoring all other MCP configurationsclaude --strict-mcp-config --mcp-config ./mcp.json
--system-promptReplace the entire system prompt with custom textclaude --system-prompt "You are a Python expert"
--system-prompt-fileLoad system prompt from a file, replacing the default promptclaude --system-prompt-file ./custom-prompt.txt
--teleportResume a web session in your local terminalclaude --teleport
--teammate-modeSet how agent team teammates display: auto (default), in-process, or tmux. See set up agent teamsclaude --teammate-mode in-process
--toolsRestrict which built-in tools Claude can use. Use "" to disable all, "default" for all, or tool names like "Bash,Edit,Read"claude --tools "Bash,Edit,Read"
--verboseEnable verbose logging, shows full turn-by-turn outputclaude --verbose
--version, -vOutput the version numberclaude -v
--worktree, -wStart Claude in an isolated git worktree at <repo>/.claude/worktrees/<name>. If no name is given, one is auto-generatedclaude -w feature-auth

System prompt flags

Claude Code provides four flags for customizing the system prompt. All four work in both interactive and non-interactive modes.
FlagBehaviorExample
--system-promptReplaces the entire default promptclaude --system-prompt "You are a Python expert"
--system-prompt-fileReplaces with file contentsclaude --system-prompt-file ./prompts/review.txt
--append-system-promptAppends to the default promptclaude --append-system-prompt "Always use TypeScript"
--append-system-prompt-fileAppends file contents to the default promptclaude --append-system-prompt-file ./style-rules.txt
--system-prompt and --system-prompt-file are mutually exclusive. The append flags can be combined with either replacement flag. For most use cases, use an append flag. Appending preserves Claude Code’s built-in capabilities while adding your requirements. Use a replacement flag only when you need complete control over the system prompt.

See also