Struct BuiltinSpec 

pub struct BuiltinSpec {
    pub path: &'static [&'static str],
    pub description: Option<&'static str>,
    pub schema_fn: Option<fn() -> Schema>,
}

One built-in command (or sub-command) slot.

Fields

path: &'static [&'static str]

Path from the top-level command name. ["install"], ["libtorch", "download"].

description: Option<&'static str>

One-line description for fdl -h listing. None = hidden (reserved for collision detection but not shown in help).

schema_fn: Option<fn() -> Schema>

Constructor for the command’s schema. None for parent commands that only group sub-commands (e.g. libtorch itself has no args) or for leaves whose argv is parsed by hand (config show, completions, autocomplete).