CLI reference changedcli-reference
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5656| `--add-dir` | Add additional working directories for Claude to read and edit files. Grants file access; most `.claude/` configuration is [not discovered](/docs/en/permissions#additional-directories-grant-file-access-not-configuration) from these directories. Validates each path exists as a directory. To persist these directories across sessions, set [`permissions.additionalDirectories`](/docs/en/settings#permission-settings) in settings | `claude --add-dir ../apps ../lib` |
5757| `--advisor <model>` | Enable the server-side [advisor tool](/docs/en/advisor) for this session with a model alias, `fable`, `opus`, or `sonnet`, or a full model ID. Takes precedence over the `advisorModel` setting for the session. `fable` requires [Fable 5 access](/docs/en/advisor#choose-an-advisor-model) | `claude --advisor opus` |
5858| `--agent` | Specify an agent for the current session (overrides the `agent` setting) | `claude --agent my-custom-agent` |
59| `--agents` | Define custom subagents dynamically via JSON. Uses the same field names as subagent [frontmatter](/docs/en/sub-agents#supported-frontmatter-fields), plus a `prompt` field for the agent's instructions | `claude --agents '{"reviewer":{"description":"Reviews code","prompt":"You are a code reviewer"}}'` |
59| `--agents` | Define custom subagents dynamically via JSON. Accepts the [fields listed for CLI-defined subagents](/docs/en/sub-agents#choose-the-subagent-scope) | `claude --agents '{"reviewer":{"description":"Reviews code","prompt":"You are a code reviewer"}}'` |
6060| `--allow-dangerously-skip-permissions` | Add `bypassPermissions` to the `Shift+Tab` mode cycle without starting in it. Lets you begin in a different mode like `plan` and switch to `bypassPermissions` later. See [permission modes](/docs/en/permission-modes#skip-all-checks-with-bypasspermissions-mode) | `claude --permission-mode plan --allow-dangerously-skip-permissions` |
6161| `--allowedTools`, `--allowed-tools` | Tools that execute without prompting for permission. See [permission rule syntax](/docs/en/settings#permission-rule-syntax) for pattern matching. To restrict which tools are available, use `--tools` instead | `"Bash(git log *)" "Bash(git diff *)" "Read"` |
62| `--append-subagent-system-prompt` | Append custom text to the end of every [subagent](/docs/en/sub-agents)'s system prompt, including nested subagents. Only applies in non-interactive mode with `-p`. Requires Claude Code v2.1.205 or later | `claude -p --append-subagent-system-prompt "Cite file paths in every answer" "query"` |
62| `--append-subagent-system-prompt` | Append custom text to the end of every [subagent](/docs/en/sub-agents)'s system prompt, nested subagents included, apart from a [forked subagent](/docs/en/sub-agents#fork-the-current-conversation), which reuses the conversation's own prompt. Only applies in non-interactive mode with `-p`. Requires Claude Code v2.1.205 or later | `claude -p --append-subagent-system-prompt "Cite file paths in every answer" "query"` |
6363| `--append-system-prompt` | Append custom text to the end of the default system prompt | `claude --append-system-prompt "Always use TypeScript"` |
6464| `--append-system-prompt-file` | Load additional system prompt text from a file and append to the default prompt | `claude --append-system-prompt-file ./extra-rules.txt` |
6565| `--autocompact <auto\|tokens>` | Set the [auto-compact window](/docs/en/model-config#set-the-auto-compact-window) for this session without changing your saved settings. Accepts the same values as `/autocompact`; that section covers the value forms and what overrides the flag. Requires Claude Code v2.1.221 or later | `claude --autocompact 500k` |
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