# Cross-Phase Validation: DISCUSS→DESIGN→DISTILL→DEVELOP Workflow

**Date**: 2026-01-20
**Phase**: End-to-End Integration Testing
**Objective**: Validate complete feature workflow from requirements to production code

## Workflow Path Validation

### DISCUSS Phase → DESIGN Phase

✓ **Requirements Gathering**
- Business context captured in structured format
- Stakeholder alignment documented
- Success criteria defined and measurable

✓ **Transition**: Handoff from business analyst to solution architect
- Requirements document references specific acceptance criteria
- Domain language established and consistent
- Technology constraints documented

### DESIGN Phase → DISTILL Phase

✓ **Architecture Design**
- Hexagonal architecture with clear ports and adapters
- Component boundaries defined with responsibility isolation
- Data flow diagrams showing system integration

✓ **Transition**: Handoff from solution architect to acceptance designer
- Architecture diagrams synchronized with acceptance test structure
- Port definitions align with test doubles policy
- Technology stack validated for ATDD framework

### DISTILL Phase → DEVELOP Phase

✓ **Acceptance Tests Created**
- Given-When-Then scenarios in business language
- One E2E test enabled per development cycle (others marked [Ignore])
- Production service integration patterns specified

✓ **Transition**: Handoff from acceptance designer to test-first developer
- Step method skeleton created with GetRequiredService<T>() pattern
- Test environment configuration matches production architecture
- NotImplementedException scaffolding for business services

### DEVELOP Phase Execution

✓ **Outside-In TDD Implementation**
- Double-loop architecture: ATDD outer loop driving UTDD inner loop
- Red-Green-Refactor cycles with all tests maintained green
- Systematic refactoring (Levels 1-6) applied after each green phase

✓ **Phase Completion Validation**
- 11-phase TDD cycle completion verified per step file
- All unit and acceptance tests passing (100% requirement)
- Business value delivered and measurable

## Integration Checkpoints

| Checkpoint | Validation | Status |
|-----------|-----------|--------|
| Requirements → Architecture | Documented in DESIGN phase | ✓ |
| Architecture → Acceptance Tests | E2E tests match component boundaries | ✓ |
| Acceptance Tests → Implementation | Production services called via DI | ✓ |
| Implementation → Quality Gates | All tests passing, refactoring complete | ✓ |

## Exit Criteria

- [x] Business requirements flow through design to tests to code
- [x] No information loss between phase transitions
- [x] Handoff packages contain all necessary context
- [x] Next phase agent can proceed without re-elicitation
- [x] All quality gates passing at each transition

## Artifacts Generated

- `/docs/cross-phase/cross-01-workflow-integration.md` - This validation document
- Step files with complete TDD phase tracking
- Acceptance tests with production service integration
- Implementation with business-focused naming
- Quality metrics meeting all standards

## Status: VALIDATED

All workflow paths from DISCUSS through DEVELOP confirmed functional and integrated.
