traceability-check

Verify bidirectional traceability from requirements to code to tests.

Triggers

Alternate expressions and non-obvious activations (primary phrases are matched automatically from the skill description):

• "RTM" → Requirements Traceability Matrix check
• "V&V matrix" → Verification & Validation coverage
• "coverage holes" in requirements context → traceability gap analysis
• "are requirements covered" → traceability validation

Purpose

This skill ensures complete traceability across the SDLC by:

• Extracting requirement IDs from documentation
• Scanning code for requirement references
• Mapping tests to requirements
• Identifying coverage gaps
• Detecting orphan artifacts

Behavior

When triggered, this skill uses the aiwg index CLI as its primary backend for artifact discovery, falling back to direct file scanning only when the index is unavailable.

Step 1: Ensure Index Available

# Check if index exists, build if needed
aiwg index stats --json || aiwg index build

Step 2: Query Requirements Inventory

# Get all requirement artifacts from the index
aiwg index query --type use-case --json
aiwg index query --type requirement --json
aiwg index query --type nfr --json

Step 3: Check Dependencies for Each Artifact

# For each requirement, check what depends on it (downstream = code, tests)
aiwg index deps .aiwg/requirements/UC-001.md --direction downstream --json

Step 4: Build Traceability Matrix

Using the dependency graph from aiwg index deps, build:

• Bidirectional mapping: requirement <-> code <-> tests
• Calculate coverage percentages
• Identify gaps in each direction

Step 5: Identify Issues

• Orphan requirements (no downstream code references)
• Untested code (code without test dependents)
• Untested requirements (requirements without test coverage)
• Code without requirements (no upstream requirement references)

Step 6: Generate Report

• Traceability matrix with coverage statistics
• Gap analysis with prioritized recommendations
• Save to .aiwg/reports/traceability-{date}.md

Fallback Behavior

If aiwg index is not available (not installed or index not built), fall back to direct scanning:

• Scan .aiwg/requirements/ for IDs (UC-, REQ-, NFR-*)
• Search source files for requirement ID references
• Search test files for requirement coverage
• Build matrix from raw file scanning results

Traceability Model

┌─────────────────┐     ┌─────────────────┐     ┌─────────────────┐
│  REQUIREMENTS   │────▶│      CODE       │────▶│     TESTS       │
│                 │     │                 │     │                 │
│ UC-001          │     │ auth.ts         │     │ auth.test.ts    │
│ UC-002          │     │ user.ts         │     │ user.test.ts    │
│ REQ-001         │     │ api/routes.ts   │     │ api.test.ts     │
│ NFR-001         │     │ perf/cache.ts   │     │ perf.test.ts    │
└─────────────────┘     └─────────────────┘     └─────────────────┘
         │                      │                       │
         │                      │                       │
         └──────────────────────┴───────────────────────┘
                     TRACEABILITY MATRIX

ID Patterns

Requirement ID Formats

Type	Pattern	Example
Use Case	UC-NNN	UC-001, UC-042
Requirement	REQ-NNN	REQ-001, REQ-123
Non-Functional	NFR-NNN	NFR-001, NFR-015
User Story	US-NNN	US-001, US-089
Feature	FEAT-NNN	FEAT-001

Code Reference Patterns

// In code comments
// Implements: UC-001
// Related: REQ-003, REQ-004

// In JSDoc
/**
 * @requirement UC-001
 * @requirement REQ-003
 */

// In function names
function handleAuthUC001() {}

// In test descriptions
describe('UC-001: User Authentication', () => {
  it('should validate credentials (REQ-001)', () => {});
});

Traceability Matrix Format

Full Matrix

| Requirement | Description | Code Files | Test Files | Status |
|-------------|-------------|------------|------------|--------|
| UC-001 | User login | auth.ts, session.ts | auth.test.ts | ✅ Covered |
| UC-002 | User logout | auth.ts | auth.test.ts | ✅ Covered |
| UC-003 | Password reset | - | - | ❌ Not Implemented |
| REQ-001 | Validate email | user.ts | user.test.ts | ✅ Covered |
| REQ-002 | Hash passwords | auth.ts | - | ⚠️ Untested |
| NFR-001 | < 200ms response | cache.ts | perf.test.ts | ✅ Covered |

Coverage Summary

## Coverage Summary

| Category | Total | Implemented | Tested | Coverage |
|----------|-------|-------------|--------|----------|
| Use Cases | 15 | 14 | 12 | 80% |
| Requirements | 42 | 40 | 35 | 83% |
| NFRs | 8 | 6 | 4 | 50% |
| **Total** | **65** | **60** | **51** | **78%** |

Gap Analysis

Orphan Requirements

Requirements with no code implementation:

### Orphan Requirements (No Implementation)

| ID | Description | Priority | Action |
|----|-------------|----------|--------|
| UC-003 | Password reset | High | Implement in Sprint 5 |
| REQ-015 | Export to PDF | Medium | Backlogged |
| NFR-008 | 99.9% uptime | High | Infrastructure ticket |

Untested Code

Code without test coverage:

### Untested Code

| File | Functions | Linked Requirements | Action |
|------|-----------|---------------------|--------|
| utils/crypto.ts | hashPassword, verifyHash | REQ-002 | Add unit tests |
| api/export.ts | generateReport | REQ-010 | Add integration test |

Rogue Code

Code with no requirement linkage:

### Code Without Requirements (Potential Rogue Features)

| File | Functions | Notes |
|------|-----------|-------|
| legacy/old-auth.ts | * | Deprecated, remove |
| experiments/feature-x.ts | * | Experimental, document or remove |

Validation Rules

Required Traceability

rules:
  requirements_to_code:
    required: true
    min_coverage: 90%
    exceptions:
      - deferred features
      - infrastructure requirements

  code_to_tests:
    required: true
    min_coverage: 80%
    exceptions:
      - generated code
      - type definitions

  requirements_to_tests:
    required: true
    min_coverage: 80%
    exceptions:
      - manual test procedures

Validation Checks

checks:
  - name: no_orphan_requirements
    description: All requirements must have implementation
    severity: warning

  - name: no_untested_requirements
    description: All requirements must have tests
    severity: warning

  - name: no_rogue_code
    description: All code must trace to requirements
    severity: info

  - name: coverage_threshold
    description: Meet minimum coverage thresholds
    severity: error

Usage Examples

Full Traceability Check

User: "Check traceability"

Skill scans:
1. Extract 65 requirements from .aiwg/requirements/
2. Scan src/ for requirement references
3. Scan test/ for requirement coverage
4. Build matrix

Output:
"Traceability Analysis Complete

Requirements: 65
Implemented: 60 (92%)
Tested: 51 (78%)

Gaps Found:
- 5 orphan requirements (no code)
- 9 untested requirements
- 3 code files with no requirement links

Report: .aiwg/reports/traceability-20251208.md"

Check Specific Requirement

User: "Trace UC-001"

Skill returns:
"UC-001: User Authentication

Implementation:
- src/auth/login.ts (lines 45-120)
- src/auth/session.ts (lines 10-50)

Tests:
- test/auth/login.test.ts (8 test cases)
- test/integration/auth.test.ts (3 scenarios)

Coverage: ✅ Fully traced"

Find Orphans

User: "Find orphan requirements"

Skill returns:
"Orphan Requirements (No Implementation):

1. UC-003: Password reset flow
   Priority: High
   Sprint: Backlog

2. REQ-015: Export to PDF
   Priority: Medium
   Sprint: Backlog

3. NFR-008: 99.9% uptime SLA
   Priority: High
   Type: Infrastructure

Total: 3 orphan requirements"

Report Format

# Traceability Analysis Report

**Date**: 2025-12-08
**Scope**: Full Project
**Tool**: traceability-check skill

## Executive Summary

| Metric | Value | Target | Status |
|--------|-------|--------|--------|
| Requirements Coverage | 92% | 90% | ✅ Pass |
| Test Coverage | 78% | 80% | ⚠️ Below Target |
| Orphan Requirements | 5 | 0 | ⚠️ Action Needed |
| Rogue Code Files | 3 | 0 | ℹ️ Review |

## Traceability Matrix

[Full matrix table...]

## Gap Analysis

### Critical Gaps
- NFR-001 (Performance) has no test coverage
- UC-012 (Payment) missing integration tests

### Action Items
1. Add performance tests for NFR-001
2. Implement UC-003 (Password reset)
3. Add tests for UC-012

## Recommendations

1. **Immediate**: Address critical test gaps
2. **Short-term**: Implement orphan requirements
3. **Process**: Add traceability to PR checklist

Integration

This skill uses:

• aiwg index query: Discover requirement artifacts by type and phase
• aiwg index deps: Navigate upstream/downstream dependency graphs
• aiwg index stats: Check index health and coverage metrics
• artifact-metadata: Get requirement artifact info (fallback)
• project-awareness: Find source and test directories (fallback)

Scanning Configuration

Configure scanning behavior in .aiwg/config/traceability.yaml:

traceability:
  requirements_dir: .aiwg/requirements/
  source_dirs:
    - src/
    - lib/
  test_dirs:
    - test/
    - __tests__/

  id_patterns:
    - "UC-\\d{3}"
    - "REQ-\\d{3}"
    - "NFR-\\d{3}"
    - "US-\\d{3}"

  code_patterns:
    - "// Implements: {id}"
    - "// Related: {id}"
    - "@requirement {id}"
    - "\\b{id}\\b"  # bare reference

  test_patterns:
    - "describe\\(['\"].*{id}.*['\"]"
    - "it\\(['\"].*{id}.*['\"]"
    - "@covers {id}"

  exclusions:
    - node_modules/
    - dist/
    - "*.generated.*"

Output Locations

• Traceability report: .aiwg/reports/traceability-{date}.md
• Traceability matrix: .aiwg/reports/traceability-matrix.csv
• Gap analysis: .aiwg/reports/coverage-gaps.md

References

• Requirements artifacts: .aiwg/requirements/
• Traceability template: templates/management/traceability-matrix-template.md
• @$AIWG_ROOT/agentic/code/frameworks/sdlc-complete/rules/artifact-discovery.md — Agent protocol for index usage
• @$AIWG_ROOT/agentic/code/frameworks/sdlc-complete/skills/artifact-lookup/SKILL.md — Artifact search skill
• @$AIWG_ROOT/src/artifacts/cli.ts — CLI implementation