- Added ability for system account to indicate JetStream not enabled, improving CLI interactions.
- Enabled updates to certain consumer attributes and included client IP in WebSocket error messages.
- Fixed several JetStream issues: messages not expiring after restart, stream reset on conditional failures, and incorrect response type on duplicate stream creation.
Release v2.6.4
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Added Leafnodes support with a configurable dial timeout option for high‑latency links
Upgrade to Go 1.25.12 and bump critical dependencies (klauspost/compress v1.19.2, golang.org/x/crypto v0.55.0).
Decoupled Raft transport and increased disk concurrency (now configurable) with several JetStream performance and memory optimizations;