async function run(ctx, argv) {
  const argv0 = argv[0] || 'corestorectl'
  const parsed = bareP2pParseCommonFlags(argv.slice(1))
  const args = parsed.rest
  const opt = parsed.opt
  if (opt.help || args.length === 0) {
    ctx.console.log(
      bareP2pHelpText(
        argv0,
        'Inspect Corestore and Hyperdrive storage plane views from /proc.',
        argv0 + ' status | namespaces | mounts | replication',
        ['status --summary', 'namespaces', 'mounts --json'],
        ['routeview', 'swarmtop']
      )
    )
    if (args.length === 0) ctx.exitCode = 1
    return
  }
  const sub = String(args[0] || '').trim()
  if (sub === 'status') {
    const replication = await bareP2pReadProcJson(ctx, '/proc/bare_os/replication')
    const sparseIndex = await bareP2pReadProcJson(
      ctx,
      '/proc/bare_os/hyperdrive_sparse_index.json'
    )
    const out = {
      schema: 1,
      replicationHealth: replication.health || 'unknown',
      replicatedKeys: Array.isArray(replication.keys)
        ? replication.keys.length
        : null,
      sparseBlocks:
        typeof sparseIndex.blockCount === 'number' ? sparseIndex.blockCount : null
    }
    bareP2pPrint(
      ctx,
      opt.summary ? { health: out.replicationHealth, keys: out.replicatedKeys } : out,
      opt
    )
    return
  }
  if (sub === 'namespaces') {
    const hints = await bareP2pReadProcJson(ctx, '/proc/bare_os/snapshot_hints.json')
    const namespaces = hints.corestoreNamespaces || [
      'system',
      'user',
      'app',
      'service',
      'temporary',
      'test'
    ]
    bareP2pPrint(ctx, { schema: 1, namespaces }, opt)
    return
  }
  if (sub === 'mounts') {
    const union = await bareP2pReadProcJson(ctx, '/proc/bare_os/union.json')
    const out = {
      schema: 1,
      hyperdriveMounts: union.mounts || [],
      note: 'Use /proc/bare_os/union.json and /proc/bare_os/replication for full detail.'
    }
    bareP2pPrint(ctx, out, opt)
    return
  }
  if (sub === 'replication') {
    const replication = await bareP2pReadProcJson(ctx, '/proc/bare_os/replication')
    bareP2pPrint(ctx, replication, opt)
    return
  }
  const sug = bareP2pSuggestSubcommand(sub, [
    'status',
    'namespaces',
    'mounts',
    'replication'
  ])
  bareP2pError(
    ctx,
    argv0,
    'unsupported subcommand' + (sug ? ' (did you mean ' + sug + '?)' : ''),
    argv0 + ' --help',
    opt
  )
}