Thanks! Pluggable backends are surely on the radar.

The current implementation is deliberately thin: the stream operations are just xadd/xread/set/get/delete. Abstracting that into a protocol wouldn't be hard, and a model based on stream-per-session, durable and serverless fits the use case well.

Redis was the pragmatic choice for v0 since most teams already have it running and the latency is good for real-time streaming to frontends. But durability is a valid concern, especially if the agent run matters (billing, compliance, debugging), you want it persisted properly, not just in Redis memory.

If S2's self-hostable OSS version lands soon, that'd lower the barrier for people to try it.

Would love to hear if there are other backend preferences out there !