Slash-command picker: no way to preview available sub-commands/verbs beyond the one-line description

Problem

Custom slash-command skills that dispatch internally to multiple sub-commands/verbs (e.g. a single /mytool command handling list, add, sync, status, ...) have no way to surface that verb list in the command picker. The picker shows only the name + description frontmatter fields -- no preview-on-focus, no expanded-detail view, and no frontmatter field (verbs:, subcommands:, or similar) that the picker actually reads.

Users have to either invoke the command blind and read its own internal help output, or go read the skill file directly, just to discover what a slash command can do.

Request

Either of these would close the gap:

1. A documented frontmatter field (e.g. verbs: or subcommands:) that the picker displays alongside the description -- even a flat comma-separated list would help.
2. A preview-on-focus/expanded-detail panel in the picker UI, similar to how many editor command palettes show extended info for the focused item.

Context

Encountered this building a personal multi-protocol slash-command system where each command dispatches to 5-9 verbs internally. Confirmed via docs that argument-hint exists but isn't picker-visible (only surfaces in /help), and no verbs:-style field exists today.