Architecture

Design documents for Chronacta subsystems.

Core

• Storage — WAL, segments, recovery
• Compatibility — SemVer, wire vs on-disk versioning
• Transports — gRPC, REST, WebSocket, Admin BFF

High availability

• Replication and HA — leader/follower, quorum, RPO/RTO

Platform

• Security — threat model, production profile, RBAC
• Admin UI — BFF + htmx
• Multi-tenant — isolation, quotas, SSO
• Entitlements — feature flags and limits
• Cloud backup — S3 remote upload

Data lifecycle

• Retention & scavenge
• Physical compaction
• Consumer groups

Operator-facing summary: compatibility policy.