Struct SpawnConfig 

pub struct SpawnConfig {
    pub model: Option<String>,
    pub max_tokens: Option<u32>,
    pub budget_usd: Option<f64>,
    pub permission_mode: Option<PermissionMode>,
    pub env: Vec<(String, String)>,
    pub system_prompt: Option<String>,
    pub reasoning: Option<String>,
}

Configuration for spawning a new session.

Fields

model: Option<String>

Model to use (e.g. “claude-opus-4-6”, “gpt-5-codex”).

max_tokens: Option<u32>

Maximum tokens for responses.

budget_usd: Option<f64>

Budget limit in USD for this session.

permission_mode: Option<PermissionMode>

Permission mode for file/command operations.

env: Vec<(String, String)>

Extra environment variables for the subprocess.

system_prompt: Option<String>

System prompt override.

reasoning: Option<String>

Reasoning effort level (provider-specific).

Trait Implementations

impl Clone for SpawnConfig

fn clone(&self) -> SpawnConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SpawnConfig

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

Formats the value using the given formatter.

impl Default for SpawnConfig

fn default() -> SpawnConfig

Returns the “default value” for a type.