Description

Description

Running `nemoclaw  channels add` without specifying a channel name
(slack/telegram/discord) crashes with a full Node.js RequiredArgsError
stack trace instead of a concise "missing argument" message. The --help
output is also misleading: it shows `` at the end of the
description text rather than in the command syntax, making it look
optional.

Device:        DGX Spark (spark-dadc, 10.173.104.110) & MacOS
OS:            Ubuntu (FastOS 7.5.0, kernel 6.17.0-1014-nvidia)
Architecture:  aarch64
Node.js:       v22.22.3
OpenShell CLI: 0.0.39
NemoClaw:      v0.0.44 (latest)
OpenClaw:      2026.4.24

1. nemoclaw my-assistant channels add
   (without specifying channel name)

Concise error message:
  Missing required argument: channel (slack | telegram | discord)
  Usage: nemoclaw  channels add  [--dry-run]

And --help should show the argument in the command syntax:
  nemoclaw  channels add    Save messaging channel credentials and rebuild

Full stack trace dumped to terminal:

  RequiredArgsError: Missing 1 required arg:
  channel  Messaging channel
  See more help with --help
      at validateArgs (.../parser/validate.js:84:19)
      at validate (.../parser/validate.js:272:5)
      ...
      (30+ lines of internal oclif/Node.js stack)

Additionally, --help output is misleading:
  nemoclaw  channels add          Save messaging channel credentials and rebuild 

The  appears at the end of the description, not in the
command syntax column, making it look like part of the description
rather than a required positional argument.

Same issue affects all channels subcommands that require :
  channels add, channels remove, channels stop, channels start

Bug Details

[NVB#6186927]