---

name: musubix-traceability description: Guide for managing traceability between requirements, designs, code, and tests. Use this when asked to verify traceability, create traceability matrices, or perform impact analysis. license: MIT

MUSUBIX Traceability Skill

This skill guides you through maintaining full traceability across the development lifecycle.

Overview

MUSUBIX enforces Article V - Traceability: Complete bidirectional tracing between:

CopyRequirements (REQ-*) ↔ Design (DES-*) ↔ Tasks (TSK-*) ↔ Code ↔ Tests

Traceability Matrix

Creating a Traceability Matrix

Copy# Traceability Matrix

| 要件ID | 設計ID | タスクID | コード | テスト |
|--------|--------|---------|--------|--------|
| REQ-AUTH-001 | DES-AUTH-001 | TSK-001 | src/auth/auth-service.ts | auth.test.ts |
| REQ-AUTH-002 | DES-AUTH-001 | TSK-002 | src/auth/token-manager.ts | token.test.ts |

CLI Commands

Copy# Generate traceability matrix
npx musubix trace matrix

# Impact analysis for a specific requirement
npx musubix trace impact REQ-AUTH-001

# Validate all traceability links
npx musubix trace validate

Traceability in Code

Adding Traceability Comments

Copy/**
 * AuthService - 認証サービス
 * @requirement REQ-AUTH-001
 * @design DES-AUTH-001
 * @task TSK-001
 */
export class AuthService {
  /**
   * ユーザー認証
   * @requirement REQ-AUTH-001
   */
  async authenticate(credentials: Credentials): Promise<Result<Token, AuthError>> {
    // Implementation
  }
}

Test Traceability

Copy/**
 * @requirement REQ-AUTH-001
 * @design DES-AUTH-001
 */
describe('AuthService', () => {
  describe('authenticate', () => {
    it('should return token for valid credentials', async () => {
      // Test implementation
    });
  });
});

Impact Analysis

When a requirement changes, identify all affected artifacts:

Copyflowchart LR
    REQ[REQ-AUTH-001<br/>変更] --> DES[DES-AUTH-001<br/>設計]
    DES --> TSK1[TSK-001<br/>タスク]
    DES --> TSK2[TSK-002<br/>タスク]
    TSK1 --> CODE1[auth-service.ts]
    TSK2 --> CODE2[token-manager.ts]
    CODE1 --> TEST1[auth.test.ts]
    CODE2 --> TEST2[token.test.ts]

Impact Analysis Steps

1. Identify changed requirement (REQ-*)
2. Find linked designs (DES-*)
3. Find linked tasks (TSK-*)
4. Locate affected code files
5. Identify tests to update
6. Update all artifacts

Traceability Storage

Copystorage/traceability/
├── matrix.json           # Full traceability matrix
├── requirements-map.json # REQ -> DES mappings
├── design-map.json       # DES -> TSK mappings
└── code-map.json         # TSK -> Code mappings

Verification Checklist

Before completing any feature:

• All requirements have linked designs
• All designs have linked tasks
• All tasks have linked code
• All code has linked tests
• Traceability comments in code
• Matrix updated

MCP Tool

Use MCP tool for automated validation:

CopyTool: sdd_validate_traceability
Description: Validates bidirectional traceability across all artifacts

Related Skills

• musubix-sdd-workflow - Full SDD workflow
• musubix-ears-validation - Requirements validation
• musubix-test-generation - Generate tests with traceability