Technical Specification

Technical Specification

Create comprehensive technical specifications for software projects.

Specification Template

# Technical Specification: [Feature Name]

## Metadata
- **Status**: Draft | In Review | Approved
- **Author**: [Name]
- **Reviewers**: [Names]
- **Last Updated**: [Date]

## Executive Summary
[2-3 sentences: What problem does this solve? What's the proposed solution?]

## Background & Context
- Current pain points
- Why now?
- Related work

## Goals
### Primary Goals
1. [Measurable goal]

### Non-Goals
- [What this spec explicitly does NOT cover]

## Functional Requirements
| ID | Requirement | Priority |
|----|-------------|----------|
| FR-1 | [Description] | P0 |
| FR-2 | [Description] | P1 |

## Non-Functional Requirements
- **Performance**: Response time < 200ms
- **Scalability**: Support 10K concurrent users
- **Availability**: 99.9% uptime
- **Security**: [Requirements]

## Technical Design

### Architecture
[Diagram or description]

### API Design

POST /api/v1/resource Request: { "field": "value" } Response: { "id": "123", "field": "value" }

### Database Schema

CREATE TABLE resources ( id UUID PRIMARY KEY, field VARCHAR(255) );

## Implementation Plan
| Phase | Timeline | Deliverables |
|-------|----------|--------------|
| 1 | Week 1-2 | Core functionality |
| 2 | Week 3 | API endpoints |
| 3 | Week 4 | Testing & docs |

## Testing Strategy
- Unit tests: 80% coverage
- Integration tests: API endpoints
- E2E tests: Critical flows

## Risks & Mitigations
| Risk | Probability | Impact | Mitigation |
|------|-------------|--------|------------|
| [Risk] | Medium | High | [Plan] |

## Success Criteria
- [ ] All P0 requirements implemented
- [ ] Tests passing
- [ ] Performance targets met
- [ ] Documentation complete

Full Template

See references/template.md for a comprehensive copy-paste template including:

• Complete metadata section
• Success metrics tables
• Architecture diagrams
• Detailed API design sections
• Security threat analysis
• Monitoring & observability
• Risk assessment matrix
• Rollout and rollback plans
• Dependencies tracking
• Open questions section

Best Practices

Do:

• Include measurable acceptance criteria
• Add architecture diagrams
• Define explicit API contracts
• Quantify performance targets
• Document risks and mitigations
• Get stakeholder review before implementation
• Include security considerations
• Define rollback procedures

Don't:

• Use vague requirements ("fast", "scalable")
• Skip non-functional requirements
• Ignore security considerations
• Leave alternatives unexplored
• Omit testing strategy
• Forget dependencies and risks

Technical Specification Template

Copy and customize this template for your feature specifications.

---

Technical Specification: [Feature Name]

Metadata

Executive Summary

[2-3 sentences: What problem are we solving? What's the proposed solution? What's the expected impact?]

Background & Context

Current State

[Describe the current situation and pain points]

Why Now?

[What's driving this work? Business drivers, user feedback, technical debt, etc.]

Related Work

• [Link to related specs]
• [Previous relevant decisions]

Goals

Primary Goals

1. [Specific, measurable goal] 2. [Another goal]

Success Metrics

Non-Goals

• [What this spec explicitly does NOT cover]
• [Out of scope items]

Requirements

Functional Requirements

Non-Functional Requirements

Technical Design

Architecture Overview

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│   Client    │────▶│   API       │────▶│  Database   │
│   (React)   │◀────│   (Node.js) │◀────│  (Postgres) │
└─────────────┘     └─────────────┘     └─────────────┘

Component Design

Component A

• Purpose: [What it does]
• Dependencies: [What it needs]
• Interfaces: [How it communicates]

Data Model

CREATE TABLE feature_table (
    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
    name VARCHAR(255) NOT NULL,
    status VARCHAR(50) DEFAULT 'active',
    created_at TIMESTAMP DEFAULT NOW(),
    updated_at TIMESTAMP DEFAULT NOW()
);

API Design

Create Resource

POST /api/v1/resources
Content-Type: application/json

Request:
{
    "name": "string",
    "description": "string"
}

Response (201):
{
    "id": "uuid",
    "name": "string",
    "createdAt": "datetime"
}

Implementation Plan

Phase 1: Foundation (Week 1-2)

• [ ] Set up database schema
• [ ] Implement core API endpoints
• [ ] Add basic validation

Phase 2: Features (Week 3-4)

• [ ] Implement main feature logic
• [ ] Add authentication
• [ ] Create admin interface

Phase 3: Polish (Week 5)

• [ ] Performance optimization
• [ ] Documentation
• [ ] Testing

Testing Strategy

Security Considerations

Threat Analysis

Security Checklist

• [ ] Input validation implemented
• [ ] Authentication required
• [ ] Authorization checks in place
• [ ] Audit logging enabled
• [ ] Data encrypted at rest

Monitoring & Observability

Key Metrics

• Request latency (p50, p95, p99)
• Error rate by endpoint
• Active users

Alerts

Risk Assessment

Dependencies

External Dependencies

• [Service/API name] - [Purpose]

Team Dependencies

• [Team name] - [What we need]

Rollout Plan

1. Staging - Internal testing 2. Canary - 5% of traffic 3. Progressive - 25% → 50% → 100%

Rollback Plan

[How to rollback if issues arise]

Open Questions

• [ ] [Question 1]
• [ ] [Question 2]

Appendix

References

• [Link to design docs]
• [Link to research]

Glossary