Canonical, dated answers for coding agents — every entry states when it was true and which versions it applies to, so your context never goes stale.
Redis Open Source 8.10 (latest 8.10.2, a security release) is current. Since 8.0 it is licensed under RSALv2, SSPLv1 or AGPLv3, and Search/JSON/TimeSeries/Bloom are built in. node-redis 6 and ioredis 6 default to RESP3 and need Node 20+.
Redis 8 folds Search/JSON/TimeSeries/Bloom into core under AGPL, adds Vector Sets for AI workloads, and deprecates the standalone Stack distribution.