IDX.LISTList declared indexes with per-index build state and stats.
| Syntax | IDX.LIST |
| Group | index |
| Arity | 1 |
| Since | 3.0.0 |
| Flags | readonly, extension |
| Complexity | Not O(1) — per shard, per index it computes live stats: range/unique O(1), text O(distinct tokens + docs), vector O(nodes + links), agg O(groups + rows) |
| Redis compatibility | kevy-only: nearest is FT._LIST plus FT.INFO combined |