N-ADR-004: (Reserved for Future Node-Scoped Decision)
Reserved ADR slot for future node-scoped architectural decisions.
Metadata
- ADR ID: N-ADR-004
- Title: [Reserved - To be determined]
- Status: Placeholder
- Date: [Not yet proposed]
- Owner: Architecture lead
- Target Decision Date: TBD
- Relates to: [TBD]
Purpose
This ADR slot is reserved for future node-scoped architectural decisions that may emerge as the design evolves.
Examples of Possible Future Topics
- FPGA Reconfiguration Policy: How to update FPGA firmware without service interruption?
- Antenna Failover Strategy: If primary antenna fails, automatic switchover or manual override?
- IPC Message Format: Protobuf, MessagePack, JSON, or custom binary? Versioning strategy?
- Health Monitor Alerting: Which conditions trigger escalation? Email, Slack, syslog, all three?
- Power Management: Node-side power sequencing, battery backup detection, graceful shutdown on power loss?
- Multi-Node Coordination: If scaling to multiple antenna nodes, how do they coordinate? Leader election? Quorum?
- Firmware Update Strategy: Rolling updates, canary deployments, rollback plan?
- Caching Policy: For schema, targets, antenna parameters , when to cache, when to re-fetch from central?
When to Activate This ADR
If the team identifies a significant node-level architectural decision that:
- Affects multiple subsystems (not a single module)
- Has multiple viable approaches with trade-offs
- Requires central team agreement before implementation
- Will be difficult to change once deployed
...then convert this placeholder to a full ADR using the template in ADR-INDEX.
Template for New ADR
Copy the structure from one of the existing ADR documents:
Related ADRs
- N-ADR-001: Schema Validation Strictness
- N-ADR-002: Decoder Backpressure Policy
- N-ADR-003: GNSS Degradation & Timestamp Authority