# Claude Code CLI - Integration Specifications

## External System Integrations

### Anthropic API Integration

| Aspect | Specification |
|--------|---------------|
| API Version | Claude AI API v1+ |
| Authentication | OAuth 2.0 |
| Request Format | JSON with context and query |
| Response Format | Structured JSON with actions and text |
| Rate Limiting | Adaptive based on usage patterns |

### Version Control Systems

| System | Integration Level | Capabilities |
|--------|-------------------|--------------|
| Git | Native | Full read/write access, history traversal, branch management |
| GitHub | API-based | PR creation, issue management, review comments |
| GitLab | API-based | MR creation, pipeline management, issue tracking |
| Bitbucket | API-based | PR workflows, repository management |

### Development Toolchains

| Tool Type | Integration Mechanism | Supported Operations |
|-----------|------------------------|----------------------|
| Package Managers | Command execution | Install, update, audit, publish |
| Build Systems | Command execution | Build, clean, incremental builds |
| Test Frameworks | Command execution + output parsing | Run tests, analyze results, debug failures |
| Linters/Formatters | Command execution + file modification | Analyze code, auto-fix issues, apply formatting |

## Extensibility Framework

### Plugin Architecture

- Plugin discovery mechanism
- Registration and lifecycle management
- Capability extension points
- Version compatibility checking

### Custom Command Integration

- Command registration interface
- Parameter definition schema
- Help documentation generation
- Execution permission model

### Tool Adapters

- Adapter interface definition
- Output parser framework
- Error handling patterns
- Configuration schema

## Interoperability

### File Format Support

| Format Category | Supported Formats | Operations |
|-----------------|-------------------|------------|
| Source Code | Multiple languages | Read, write, analyze, refactor |
| Configuration | JSON, YAML, TOML, etc. | Parse, validate, modify |
| Documentation | Markdown, RST, etc. | Generate, update, format |
| Data | CSV, JSON, etc. | Read, transform, validate |

### Protocol Support

| Protocol | Purpose | Implementation |
|----------|---------|----------------|
| HTTP/HTTPS | API communication | Native Node.js |
| SSH | Git operations, remote commands | SSH2 library |
| WebSocket | Real-time communication | ws library |

### IDE Integration

| IDE | Integration Method | Features |
|-----|-------------------|----------|
| VS Code | Extension | Command palette integration, context menu |
| JetBrains | Plugin | Tool window, action system integration |
| Vim/Neovim | Plugin | Command mode integration |

## Authentication Mechanisms

### Service Authentication

- API key management
- OAuth token workflows
- Credential storage security
- Token refresh mechanisms

### Repository Authentication

- SSH key management
- HTTPS credential handling
- Token-based authentication
- Multi-factor authentication support

## Integration Extension Points

### Custom Tool Integrations

- Tool definition interface
- Command output parsing
- Error handling protocol
- Help documentation generation

### Custom AI Services

- Alternative AI provider integration
- Model configuration options
- Response format adaptation
- Context preparation customization

## Integration Configuration

### Configuration File Format

```json
{
  "integrations": {
    "vcs": {
      "provider": "git",
      "settings": {
        // Provider-specific settings
      }
    },
    "packageManager": {
      "provider": "npm",
      "settings": {
        // Provider-specific settings
      }
    },
    "ai": {
      "provider": "anthropic",
      "settings": {
        // Provider-specific settings
      }
    },
    // Additional integration configurations
  }
}
```

### Environment Variable Integration

- Environment variable mapping to configuration
- Secure handling of sensitive values
- Override precedence rules
- Dynamic reconfiguration support