Architecture reference

This series describes the architecture of Nova Audio Agent. Each volume owns one design boundary and links to the implementation concepts that enforce it.

1. Runtime spine
2. Memory
3. Context view
4. Ports
5. Executors
6. Local development
7. Design constraints
8. Roadmap
9. Executor onboarding
10. Vision

The through-line is simple: background capability is useful only when lifecycle, memory, attention, and speech ownership remain explicit.