TDD Orchestrator Examples

Real-world TDD workflow examples demonstrating red-green-refactor discipline, mutation testing, and multi-agent coordination.

Files in This Directory

red-green-refactor-example.md

Complete TDD cycle for implementing user authentication - demonstrates strict red-green-refactor discipline with 19-minute cycle time, 87% coverage, and 91% mutation score.

When to use: Learning core TDD cycle, demonstrating methodology to teams Demonstrates: RED phase validation, GREEN minimal implementation, REFACTOR with confidence Metrics: 5min RED, 8min GREEN, 6min REFACTOR = 19min total

outside-in-tdd-example.md

Feature-first TDD approach for order processing system - starts with acceptance test, works inward through layers (API → Service → Repository → Database).

When to use: Building new features, establishing architectural boundaries Demonstrates: Acceptance tests first, mocking collaborators, layer-by-layer implementation Metrics: 4-day feature, 95% coverage, zero defects in production

mutation-testing-example.md

Mutation testing workflow to validate test quality - identifies weak tests through code mutations, improves from 73% to 94% mutation score.

When to use: Validating test suite quality, finding edge cases Demonstrates: Mutation generation, survivor analysis, test strengthening Tools: mutmut (Python), Stryker (JavaScript)

tdd-rescue-example.md

Recovery protocols for TDD failures - handles test passing unexpectedly, green phase failures, and refactoring breaks.

When to use: Recovering from TDD anti-patterns, training teams on recovery Demonstrates: RED phase failures, GREEN phase debugging, REFACTOR rollback Outcome: 3 failed cycles recovered, methodology restored

Usage Patterns

Learning TDD: Start with red-green-refactor-example.md

Building Features: Use outside-in-tdd-example.md

Improving Test Quality: Follow mutation-testing-example.md

Handling Problems: Reference tdd-rescue-example.md

Quick Reference

TDD Cycle Duration:

RED: 3-10 minutes (write failing test)
GREEN: 5-15 minutes (minimal implementation)
REFACTOR: 5-10 minutes (improve design)
Total: 15-35 minutes per cycle

Coverage Targets:

Line coverage: 80% minimum
Branch coverage: 75% minimum
Critical path: 100% required
Mutation score: 85%+ excellent

Anti-Patterns to Avoid:

Writing implementation before test
Multiple tests before implementation
Skipping refactor phase
Tests that don't fail first
Over-engineering in GREEN phase

Return to tdd-orchestrator agent

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