/**
 * Hyperdrive-resident kernel (staged as /boot/init.js).
 * Loaded by the booter with an injected ctx object (trusted replication source).
 */
async function start(ctx) {
  const { console, drive, readLine, execLine, b4a } = ctx
  const rel = await drive.get('/etc/os-release')
  if (rel) console.log(b4a.toString(rel))
  console.log(
    'Bare operating system — session: guest (login [--new] <passphrase> to unlock identity) | shell: cd, export, exit, login, logout | try: help, ls /bin, pwd, crontab -l'
  )
  while (true) {
    const line = await readLine('')
    if (line == null) break
    const t = line.trim()
    if (t === '') continue
    let status = 'ok'
    try {
      status = await execLine(t)
    } catch (e) {
      console.error((e && e.message) || String(e))
    }
    if (status === 'exit') break
  }
}