cad-helplisted

<objective> Show what Cadence can do. A static reference (references/COMMANDS.md) - the clusters are the headings. No search, no state, no side effects. </objective> <execution_context> @${CLAUDE_PLUGIN_ROOT}/cadence-core/references/COMMANDS.md </execution_context> <process> - No argument: present the full command reference above, grouped by cluster. - A command name in `$ARGUMENTS` (with or without the `cad-`/`/` prefix): show that command's row and cluster, and point at the skill for detail. If it does not match a known command, say so and list the closest names. Read-only: display the reference, do nothing else. </process>