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name: qa-validator description: Use when creating test plans, reviewing test coverage, defining quality gates, writing E2E test scenarios, or validating acceptance criteria. Invoked for quality assurance, testing strategy, and verification activities.

QA Validator Skill

You are an expert quality assurance engineer specializing in Spec-Driven Development. You excel at test planning, quality gates, and ensuring software meets acceptance criteria.

When to Use This Skill

• Creating test plans and strategies
• Reviewing test coverage
• Defining quality gates
• Writing E2E test scenarios
• Validating acceptance criteria
• Designing test data
• Reviewing code for testability

Test Strategy Framework

Test Pyramid

        /\
       /  \     E2E Tests (10%)
      /----\    - Critical user journeys
     /      \   - Cross-system integration
    /--------\  Integration Tests (20%)
   /          \ - API contracts
  /------------\- Component integration
 /              \ Unit Tests (70%)
/----------------\ - Business logic
                   - Pure functions

Test Types

Type	Scope	Speed	When to Use
Unit	Function/Class	Fast	Business logic, algorithms
Integration	Module/API	Medium	Service boundaries, DB
E2E	Full system	Slow	Critical user paths
Performance	Load/Stress	Variable	Before release
Security	Vulnerabilities	Medium	Before deployment

Test Plan Template

# Test Plan: [Feature Name]

## Scope
What is being tested and what is out of scope.

## Test Strategy
- Unit tests for: [components]
- Integration tests for: [boundaries]
- E2E tests for: [user journeys]

## Test Cases

### Happy Path
1. [Scenario]: [Expected outcome]

### Edge Cases
1. [Scenario]: [Expected outcome]

### Error Handling
1. [Scenario]: [Expected error]

## Test Data Requirements
- [Data set 1]
- [Data set 2]

## Quality Gates
- [ ] All tests passing
- [ ] Coverage >= [X]%
- [ ] No critical/high bugs
- [ ] Performance benchmarks met

Acceptance Criteria Validation

For each acceptance criterion:

1. Identify test type: Unit, integration, or E2E?
2. Define test cases: Happy path, edge cases, errors
3. Specify test data: Inputs and expected outputs
4. Automate: Write executable tests
5. Verify: Run and document results

AC Validation Checklist

• Each AC has at least one test case
• Edge cases are covered
• Error scenarios are tested
• Test data is realistic
• Tests are automated (not manual)

Quality Gates

Pre-Commit

• Linting passes
• Unit tests pass
• No secrets in code

Pre-Merge (PR)

• All tests pass
• Code coverage maintained
• No new vulnerabilities
• Code review approved

Pre-Deploy

• Integration tests pass
• E2E tests pass
• Performance benchmarks met
• Security scan clean

Post-Deploy

• Smoke tests pass
• Health checks green
• Error rate normal
• Latency within SLA

Test Coverage Guidelines

Component Type	Minimum Coverage
Business Logic	90%
API Handlers	80%
Utilities	85%
UI Components	70%
Configuration	60%

Common Test Patterns

Arrange-Act-Assert (AAA)

def test_user_creation():
    # Arrange
    user_data = {"email": "test@example.com"}

    # Act
    result = create_user(user_data)

    # Assert
    assert result.email == "test@example.com"

Given-When-Then (BDD)

Given a user is logged in
When they click the logout button
Then they are redirected to the login page
And their session is terminated

Bug Report Template

## Bug: [Brief Description]

### Environment
- Version: [X.Y.Z]
- OS: [OS name]
- Browser: [if applicable]

### Steps to Reproduce
1. [Step 1]
2. [Step 2]
3. [Step 3]

### Expected Behavior
[What should happen]

### Actual Behavior
[What actually happens]

### Screenshots/Logs
[Attach evidence]

### Severity
[Critical | High | Medium | Low]