Architecture Decision Records

This section contains Architecture Decision Records (ADRs) that document significant architectural decisions made during the development of ReX.

What is an ADR?

An Architecture Decision Record is a document that captures an important architectural decision made along with its context and consequences. Each ADR describes:

• The architectural decision that was made
• The context and problem statement that motivated the decision
• The decision drivers and constraints considered
• The options that were evaluated
• The resulting consequences, both positive and negative
• The current status of the decision

ADR Index

The following ADRs have been documented:

1. ADR-001: MDX Content System
2. ADR-002: Realtime Content Watching
3. ADR-003: Registry Facade Architecture
4. ADR-004: Reactive Content Streams
5. ADR-005: Content Orchestration Architecture
6. ADR-006: Distributed Content Architecture
7. ADR-007: Compositional Content Architecture
8. ADR-008: Historical Collaborative Content Architecture
9. ADR-009: Unified Type System (Planned)
10. ADR-010: Plugin Architecture (Planned)

ADR Process

For creating new ADRs, follow these steps:

1. Create a new ADR using the ADR template
2. Number it sequentially following the existing pattern
3. Document the architectural decision with all required sections
4. Submit the ADR for review
5. Update the ADR status once reviewed and accepted
6. Add the new ADR to this index

Status Terms

ADRs use the following status terms:

• Proposed: The ADR has been proposed but not yet reviewed
• Accepted: The ADR has been accepted and represents current architecture
• Deprecated: The ADR is no longer relevant but is kept for historical context
• Superseded: The ADR has been replaced by a newer ADR

ADR Lifecycle

ADRs follow a defined lifecycle:

1. Creation: A new architectural decision is identified and documented
2. Review: The proposed decision is reviewed by the team
3. Acceptance: The decision is accepted and implemented
4. Reference: The ADR serves as reference for implementation and future decisions
5. Evolution: The ADR may be superseded by newer decisions as the system evolves

Connections to Implementation

ADRs directly inform:

• Implementation Tasks: Each ADR typically results in implementation tasks
• Design Patterns: ADRs often establish patterns that are reused throughout the system
• Documentation: Conceptual documentation often expands on topics introduced in ADRs
• Code Structure: The codebase structure reflects decisions documented in ADRs