Function isKnownSubcommand

src/utils/shell/specPrefix.ts:40–48

(arg: string, spec: CommandSpec | null)

// Check if an argument matches a known subcommand (case-insensitive: PS
// callers pass original-cased args; fig spec names are lowercase)
function isKnownSubcommand(arg: string, spec: CommandSpec | null): boolean {
  if (!spec?.subcommands?.length) return false
  const argLower = arg.toLowerCase()
  return spec.subcommands.some(sub =>
    Array.isArray(sub.name)
      ? sub.name.some(n => n.toLowerCase() === argLower)
      : sub.name.toLowerCase() === argLower,
  )
}

// Check if a flag takes an argument based on spec, or use heuristic
function flagTakesArg(