Open Decisions

Closed decisions:

• ADR-0004 accepts NATS JetStream as the V1 internal broker.
• Initial interactive authentication uses local username/password login.
• Authentication architecture must remain compatible with future OIDC-compatible identity providers and tenant-specific SSO.

The main open decisions are:

• final Netmore MQTT topic and payload contract,
• MQTT QoS and application-level idempotency strategy,
• password storage, token model, refresh tokens, and service accounts,
• role permission matrix,
• organization access semantics,
• historical device assignment model,
• measurement table shape,
• TimescaleDB Apache-2.0 edition versus Timescale License feature requirements for automated retention, compression, and continuous aggregates,
• export storage and retention,
• backup tooling, RPO, and RTO,
• metrics, logs, dashboard, and alerting stack.

No implementation should hard-code one of these decisions before it is captured in an ADR, contract, or architecture document.