# Phase Index: CASCADE Fix v1.8.0-alpha.5

**Quick Navigation** | [Overview](#overview) | [Documents](#documents) | [Workflow](#workflow) | [Status](#status)

---

## Overview

**Goal:** Fix CASCADE nesting bug in FraiseQL v1.8.0-alpha.5

**Problem:** CASCADE appears in entity instead of success wrapper
**Solution:** Parse PrintOptim's 8-field `mutation_response` composite type
**Effort:** 4-6 hours
**Impact:** High (fixes critical bug)

---

## Documents

### Core Documents (Start Here)

1. **[README.md](./README.md)** - Phase overview and quick links
   - 📖 Read time: 3 minutes
   - 🎯 Purpose: Understand what this phase does

2. **[03_QUICK_START.md](./03_QUICK_START.md)** - Implementation speedrun
   - 📖 Read time: 5 minutes
   - 🎯 Purpose: Get started immediately
   - ⚡ Best for: Experienced developers who want to ship fast

### Detailed Documents

3. **[00_OVERVIEW.md](./00_OVERVIEW.md)** - Problem analysis & requirements
   - 📖 Read time: 10 minutes
   - 🎯 Purpose: Understand the bug and success criteria
   - 📊 Contains: Problem statement, root cause, acceptance criteria

4. **[01_IMPLEMENTATION_PLAN.md](./01_IMPLEMENTATION_PLAN.md)** - Step-by-step guide
   - 📖 Read time: 20 minutes
   - 🎯 Purpose: Detailed implementation with complete code examples
   - 💻 Contains: RED→GREEN→REFACTOR→QA→COMMIT phases

5. **[02_TESTING_STRATEGY.md](./02_TESTING_STRATEGY.md)** - Comprehensive testing
   - 📖 Read time: 15 minutes
   - 🎯 Purpose: Ensure bug is actually fixed
   - 🧪 Contains: Unit, integration, and E2E test plans

---

## Workflow

### For Implementers

```
START
  ↓
Read: 03_QUICK_START.md (5 min)
  ↓
Implement: Follow quick start steps (3-4 hours)
  ↓
Test: Run test suite (30 min)
  ↓
Verify: Check with PrintOptim (30 min)
  ↓
Release: Publish to PyPI (15 min)
  ↓
DONE ✅
```

### For Reviewers

```
START
  ↓
Read: README.md (3 min)
  ↓
Read: 00_OVERVIEW.md (10 min)
  ↓
Review: Code changes in PR
  ↓
Check: Test coverage report
  ↓
Approve: If all criteria met
  ↓
DONE ✅
```

### For Architects

```
START
  ↓
Read: 00_OVERVIEW.md (10 min)
  ↓
Read: 01_IMPLEMENTATION_PLAN.md (20 min)
  ↓
Review: Design decisions
  ↓
Read: docs/architecture/mutation_pipeline.md
  ↓
Validate: Approach vs alternatives
  ↓
DONE ✅
```

---

## Status Tracking

### Phase Status: 🟡 Ready for Implementation

| Phase | Status | Duration |
|-------|--------|----------|
| Planning | ✅ Complete | N/A |
| Implementation | 🟡 Ready | 4-6 hours |
| Testing | ⏳ Pending | 30 min |
| Review | ⏳ Pending | 1 hour |
| Release | ⏳ Pending | 15 min |

### Checklist

**Planning** ✅
- [x] Problem identified
- [x] Root cause analyzed
- [x] Solution designed
- [x] Documents written

**Implementation** 🟡
- [ ] Feature branch created
- [ ] Parser module created
- [ ] Entry point updated
- [ ] Tests added
- [ ] Tests passing

**Testing** ⏳
- [ ] Rust unit tests pass
- [ ] Python integration tests pass
- [ ] PrintOptim mutations tested
- [ ] CASCADE location verified

**Release** ⏳
- [ ] Version bumped
- [ ] CHANGELOG updated
- [ ] Git commit created
- [ ] Package published

---

## Quick Reference

### Commands

```bash
# Setup
git checkout -b fix/cascade-nesting-v1.8.0a5

# Test
cargo test                    # Rust tests
pytest tests/                 # Python tests

# Build
uv build                      # Build package

# Publish
uv publish                    # Publish to PyPI
```

### Key Files

```
fraiseql_rs/src/mutation/
├── postgres_composite.rs  # NEW: 8-field parser
├── mod.rs                 # UPDATE: Import new module
└── tests.rs               # UPDATE: Add tests
```

### Key Concepts

- **8-field composite:** PrintOptim's mutation_response type
- **Position 7:** CASCADE field location
- **Position 4:** entity_type field location
- **Fallback:** Simple format for backward compatibility

---

## Navigation

### By Role

**👨‍💻 Developer (Implementing)**
→ Start with [03_QUICK_START.md](./03_QUICK_START.md)

**👀 Reviewer (Reviewing PR)**
→ Start with [00_OVERVIEW.md](./00_OVERVIEW.md)

**🏗️ Architect (Understanding Design)**
→ Start with `docs/architecture/mutation_pipeline.md`

**🧪 QA (Testing)**
→ Start with [02_TESTING_STRATEGY.md](./02_TESTING_STRATEGY.md)

**📊 PM (Tracking Progress)**
→ This file (INDEX.md)

### By Phase

**📖 Planning Phase**
- [00_OVERVIEW.md](./00_OVERVIEW.md) - Problem & requirements
- Design doc: `docs/architecture/mutation_pipeline.md`

**💻 Implementation Phase**
- [03_QUICK_START.md](./03_QUICK_START.md) - Quick reference
- [01_IMPLEMENTATION_PLAN.md](./01_IMPLEMENTATION_PLAN.md) - Detailed guide

**🧪 Testing Phase**
- [02_TESTING_STRATEGY.md](./02_TESTING_STRATEGY.md) - Test plans

**🚀 Release Phase**
- [01_IMPLEMENTATION_PLAN.md](./01_IMPLEMENTATION_PLAN.md) - COMMIT section
- CHANGELOG.md - Release notes template

---

## External References

### Design Documents
- **Main Design:** `docs/architecture/mutation_pipeline.md`
- **Phase Documentation:** See documents in this directory

### Related Projects
- **PrintOptim Migration:** `/home/lionel/code/printoptim_backend_manual_migration/.phases/phase_fraiseql_mutation_response/`
- **GraphQL CASCADE Spec:** `~/code/graphql-cascade/`

### Code Repositories
- **FraiseQL:** `/home/lionel/code/fraiseql`
- **PrintOptim:** `/home/lionel/code/printoptim_backend_manual_migration`

---

## Support

### Troubleshooting

**Issue:** Tests fail
→ See [02_TESTING_STRATEGY.md](./02_TESTING_STRATEGY.md) - Debugging section

**Issue:** Compilation error
→ See [03_QUICK_START.md](./03_QUICK_START.md) - Troubleshooting section

**Issue:** CASCADE still in wrong location
→ See [01_IMPLEMENTATION_PLAN.md](./01_IMPLEMENTATION_PLAN.md) - QA Phase

### Questions

**Q: Where do I start?**
A: Read [README.md](./README.md), then [03_QUICK_START.md](./03_QUICK_START.md)

**Q: How long will this take?**
A: 4-6 hours for focused implementation

**Q: What if I break something?**
A: Fallback ensures backward compatibility. See rollback plan in [README.md](./README.md)

**Q: Do I need PrintOptim running?**
A: For full E2E tests, yes. For unit/integration tests, no.

---

## Metrics

### Code Changes
- **New files:** 1 (~80 lines)
- **Modified files:** 2 (~105 lines)
- **Tests added:** ~100 lines
- **Total changes:** ~285 lines

### Time Estimates
- **Read docs:** 30-60 min
- **Implementation:** 3-4 hours
- **Testing:** 30-60 min
- **Release:** 15-30 min
- **Total:** 4-6 hours

### Success Rate
- **Expected:** 95% success on first attempt
- **Common issues:** Typos, missed imports (easy to fix)
- **Rollback risk:** Very low (backward compatible)

---

## Version History

| Version | Date | Changes |
|---------|------|---------|
| 1.0 | 2025-12-06 | Initial phase documents created |

---

## Next Phase

After v1.8.0-alpha.5 is released:

**Option 1: Stable Release (v1.8.0)**
- Remove alpha status
- Full documentation update
- Production deployment

**Option 2: Enhanced Features (v1.8.1)**
- Advanced CASCADE features
- Additional performance monitoring
- Extended test coverage

**Recommended:** Go with Option 1 (Stable Release)

---

**Last Updated:** 2025-12-06
**Status:** Ready for Implementation
**Owner:** FraiseQL Team

🚀 **Let's fix this bug!**
