Struct Cli 

pub struct Cli {

    pub model: Option<String>,
    pub reasoning: Option<ReasoningLevel>,
    pub path: Option<PathBuf>,
    pub verbose: bool,
    pub resume: Option<Option<String>>,
    pub continue_session: bool,
    pub record: Option<PathBuf>,
    pub replay: Option<PathBuf>,
    pub system_prompt: Option<String>,
    pub system_prompt_file: Option<PathBuf>,
    pub append_system_prompt: Option<String>,
    pub append_system_prompt_file: Option<PathBuf>,
    pub config_overrides: Vec<String>,
    pub no_network: bool,
    pub confine_fs: bool,
    pub sandbox: bool,
    pub profile: Option<String>,
    pub command: Option<Commands>,
}

Fields

model: Option<String>

Model to use (e.g., qwen3-coder:30b, ollama/llama3)

reasoning: Option<ReasoningLevel>

Reasoning depth (none, minimal, low, medium, high, max). Overrides the persisted default for this session; the slash command /reasoning <level> and Alt+T can change it at runtime.

path: Option<PathBuf>

Project directory (defaults to current directory)

verbose: bool

Verbose output

resume: Option<Option<String>>

Resume a past conversation. Bare --resume opens a searchable picker (interactive only); --resume <SESSION_ID> loads that session directly and also works headless with mermaid run. Like claude --resume. None = flag absent; Some(None) = bare (picker); Some(Some(id)) = direct load.

continue_session: bool

Resume the most recent conversation in this directory. Like claude --continue.

record: Option<PathBuf>

Append every reducer Msg to a JSONL file at this path for debugging / post-mortem replay. Interactive mode only.

replay: Option<PathBuf>

Replay a --record log through the pure reducer: print the reconstructed session and a determinism verdict. Headless — no model calls, no tool execution, no config reads (the log is self-contained).

system_prompt: Option<String>

Replace Mermaid’s default system prompt for this invocation

system_prompt_file: Option<PathBuf>

Replace Mermaid’s default system prompt with the contents of a file

append_system_prompt: Option<String>

Append extra instructions after Mermaid’s system prompt for this invocation

append_system_prompt_file: Option<PathBuf>

Append extra instructions from a file after Mermaid’s system prompt

config_overrides: Vec<String>

Override a config value: repeatable -c key.path=value applied on top of the config file (value parsed as TOML, so true/3/"x" keep their types; a bare word is a string). Example: -c default_model.max_tokens=8192 -c safety.mode=full_access.

no_network: bool

Deny network access for model-run shell commands this session. On Linux a seccomp kill-switch blocks internet sockets (AF_INET/AF_INET6); a no-op on other platforms. Equivalent to -c safety.network=deny.

confine_fs: bool

Confine model-run shell commands’ writes to the project directory (plus the system temp directory and /dev) this session. Linux Landlock, best-effort; a no-op on other platforms and pre-5.13 kernels. Equivalent to -c safety.filesystem=project.

sandbox: bool

Full OS sandbox for model-run shell commands: shorthand for --no-network --confine-fs.

profile: Option<String>

Apply a named config overlay from [profiles.<name>] in your user config file for this invocation. Profile values beat the user file but lose to a repo’s project config and to -c overrides.

command: Option<Commands>

Implementations

impl Cli

pub fn session_flags(&self) -> SessionFlags

Collect this invocation’s config-shaped flags into the Session config layer’s inputs: the repeatable -c overrides plus the dedicated flags (--no-network/--confine-fs/--sandbox, and run’s --max-tokens/--allow-untrusted-tools). Prompt flags and --reasoning stay outside the layer merge — see apply_prompt_flags.

Trait Implementations

impl Args for Cli

fn group_id() -> Option<Id>

Report the ArgGroup::id for this set of arguments

fn augment_args<'b>(__clap_app: Command) -> Command

Append to Command so it can instantiate Self via FromArgMatches::from_arg_matches_mut

fn augment_args_for_update<'b>(__clap_app: Command) -> Command

Append to Command so it can instantiate self via FromArgMatches::update_from_arg_matches_mut

impl CommandFactory for Cli

fn command<'b>() -> Command

Build a Command that can instantiate Self.

fn command_for_update<'b>() -> Command

Build a Command that can update self.

impl Debug for Cli

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl FromArgMatches for Cli

fn from_arg_matches(__clap_arg_matches: &ArgMatches) -> Result<Self, Error>

Instantiate Self from ArgMatches, parsing the arguments as needed.

fn from_arg_matches_mut( __clap_arg_matches: &mut ArgMatches, ) -> Result<Self, Error>

Instantiate Self from ArgMatches, parsing the arguments as needed.

fn update_from_arg_matches( &mut self, __clap_arg_matches: &ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

fn update_from_arg_matches_mut( &mut self, __clap_arg_matches: &mut ArgMatches, ) -> Result<(), Error>

Assign values from ArgMatches to self.

impl Parser for Cli

fn parse() -> Self

Parse from std::env::args_os(), exit on error.

fn try_parse() -> Result<Self, Error>

Parse from std::env::args_os(), return Err on error.

fn parse_from<I, T>(itr: I) -> Self

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, exit on error.

fn try_parse_from<I, T>(itr: I) -> Result<Self, Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Parse from iterator, return Err on error.

fn update_from<I, T>(&mut self, itr: I)

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, exit on error.

fn try_update_from<I, T>(&mut self, itr: I) -> Result<(), Error>

where I: IntoIterator<Item = T>, T: Into<OsString> + Clone,

Update from iterator, return Err on error.