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Design Document:

Status: Draft | In Review | Approved Author(s): Reviewers: Last updated:

1. Overview

1.1 Summary

1.2 Background & Context

1.3 Glossary

2. Goals and Non-Goals

2.1 Goals

2.2 Non-Goals

2.3 Success Metrics

3. Requirements

3.1 Functional Requirements

3.1.1 User-Facing Behavior

3.1.2 Administrative Behavior

3.2 Non-Functional Requirements

3.2.1 Performance

3.2.2 Scalability

3.2.3 Availability & Reliability

3.2.4 Security & Privacy

3.3 Constraints & Assumptions

4. Proposed Design

4.1 High-Level Architecture

4.1.1 Component Diagram

4.1.2 Request Flow

4.2 Data Model

4.2.1 Entities

4.2.2 Schema Changes

4.2.3 Migration Strategy

4.3 API Design

4.3.1 Public Endpoints

4.3.2 Internal Interfaces

4.3.3 Error Handling & Status Codes

4.4 Component Details

4.4.1

4.4.1.1 Responsibilities
4.4.1.2 Interfaces

4.4.2

4.5 Failure Modes and Recovery

5. Alternatives Considered

5.1 Alternative A

5.1.1 Pros

5.1.2 Cons

5.2 Alternative B

5.3 Why the Proposed Design Was Chosen

6. Cross-Cutting Concerns

6.1 Observability

6.1.1 Metrics

6.1.2 Logging

6.1.3 Alerting

6.2 Testing Strategy

6.2.1 Unit Tests

6.2.2 Integration Tests

6.2.3 Load Tests

6.3 Backward Compatibility

6.4 Cost Analysis

7. Rollout Plan

7.1 Phases

7.2 Feature Flags

7.3 Rollback Plan

8. Risks and Open Questions

8.1 Risks

8.2 Open Questions

9. Timeline and Milestones

10. Appendix

10.1 References

10.2 Prior Art

10.3 Revision History