opencode-boilerplate/.opencode/skills/architecture-design/template.md

Architecture Design Document

Technology Stack

Languages and Runtimes

Technology	Version
Node.js	v24.11.0
TypeScript	5.x
npm	11.x

Frameworks and Libraries

Technology	Version	Purpose	Rationale
[name]	[version]	[purpose]	[rationale]
[name]	[version]	[purpose]	[rationale]

Development Tools

Technology	Version	Purpose	Rationale
[name]	[version]	[purpose]	[rationale]
[name]	[version]	[purpose]	[rationale]

Architecture Pattern

Layered Architecture

┌─────────────────────────┐
│   UI layer              │ ← Accepts and displays user input
├─────────────────────────┤
│   Service layer          │ ← Business logic
├─────────────────────────┤
│   Data layer             │ ← Data persistence
└─────────────────────────┘

UI Layer

• Responsibility: Accepting user input, validation, displaying results
• Permitted operations: Calling the service layer
• Prohibited operations: Direct access to the data layer

Service Layer

• Responsibility: Implementing business logic, data transformation
• Permitted operations: Calling the data layer
• Prohibited operations: Depending on the UI layer

Data Layer

• Responsibility: Data persistence and retrieval
• Permitted operations: Access to the file system and databases
• Prohibited operations: Implementing business logic

Data Persistence Strategy

Storage Method

Data type	Storage	Format	Rationale
[data 1]	[method]	[format]	[rationale]
[data 2]	[method]	[format]	[rationale]

Backup Strategy

• Frequency: [e.g., every hour]
• Destination: [e.g., .backup/ directory]
• Generation management: [e.g., retain the latest 5 generations]
• Restoration method: [procedure]

Performance Requirements

Response Time

Operation	Target time	Measurement environment
[operation 1]	[time]	[environment]
[operation 2]	[time]	[environment]

Resource Usage

Resource	Limit	Rationale
Memory	[MB]	[rationale]
CPU	[%]	[rationale]
Disk	[MB]	[rationale]

Security Architecture

Data Protection

• Encryption: [target data and method]
• Access control: [file permissions, etc.]
• Sensitive information management: [environment variables, config files, etc.]

Input Validation

• Validation: [validation items]
• Sanitization: [target and method]
• Error handling: [secure error display]

Scalability Design

Handling Data Growth

• Expected data volume: [e.g., 10,000 tasks]
• Performance degradation countermeasures: [method]
• Archive strategy: [handling of old data]

Extensibility

• Plugin system: [presence/absence and design]
• Configuration customization: [scope of what is possible]
• API extensibility: [methods for future extension]

Test Strategy

Unit Tests

• Framework: [framework name]
• Target: [description of test target]
• Coverage target: [%]

Integration Tests

• Method: [test method]
• Target: [description of test target]

E2E Tests

• Tool: [tool name]
• Scenarios: [test scenarios]

Technical Constraints

Environment Requirements

• OS: [supported OS]
• Minimum memory: [MB]
• Required disk space: [MB]
• Required external dependencies: [list]

Performance Constraints

• [constraint 1]
• [constraint 2]

Security Constraints

• [constraint 1]
• [constraint 2]

Dependency Management

Library	Purpose	Version management policy
[name]	[purpose]	[pinned/range]
[name]	[purpose]	[pinned/range]