Struct RegisterOptions 

pub struct RegisterOptions<'a> {
    pub provider: &'a str,
    pub model: &'a str,
    pub command: &'a str,
    pub prompt_preview: Option<&'a str>,
    pub session_id: Option<&'a str>,
    pub session_name: Option<&'a str>,
    pub root: Option<&'a str>,
}

Borrowed options for register. Field semantics mirror ProcessEntry one-for-one.

Fields

provider: &'a str

Provider name (e.g. "claude", "codex").

model: &'a str

Effective model string (e.g. "sonnet").

command: &'a str

Subcommand label stored in the entry: "run", "exec", "plan", etc. Used by zag ps for display.

prompt_preview: Option<&'a str>

First ~100 chars of the prompt, if any.

session_id: Option<&'a str>

Session id this process is associated with (zag’s internal session_id, not the provider-native one). Becomes ZAG_SESSION_ID for the child.

session_name: Option<&'a str>

Optional human-friendly session name. Becomes ZAG_SESSION_NAME.

root: Option<&'a str>

Project root passed through to the entry and ZAG_ROOT.